an ISO 9001:2008 Registered Company

1967-68 Chevrolet Camaro without Factory Air

Evaporator Kit(561167)

18865 Goll St. San Antonio, TX 78266 Phone: 210-654-7171

Fax: 210-654-3113www.vintageair.com

901167 REV D 01/13/17, PG 1 OF 32

2

www.vintageair.com

901167 REV D 01/13/17, PG 2 OF 32

Thank you for purchasing this evaporator kit from Vintage Air. When installing these components as part of a complete SureFit™ system, Vintage Air recommends working from front to back on the vehicle, installing the condenser kit, hose kit, and compressor first, followed by the wiring, evaporator, and finally the control panel.

Cover..................................................................................................................................Table of Contents.................................................................................................................Packing List/Parts Disclaimer..................................................................................................Information Page..................................................................................................................Wiring Notice.......................................................................................................................Engine Compartment Disassembly, Condenser Assembly and Installation, Compressor and Brackets, Pulleys..........................................................................................Passenger Compartment Disassembly..................................................................................... Dash Frame Modification, Trim Plate Modification......................................................................Center Louver Installation.....................................................................................................Evaporator Mounting Holes, Defrost Duct & Fresh Air Cover Installation..................................... Passenger Side Dash Modification (1967 Models Only), Driver Side Dash Modification (1967 Models Only)............................................................................................................ Driver & Passenger Side Louver Installation, Hose Adapter Installation (1968 Models with OEM Astro Vents Only)...............................................................................................................Fresh Air Cap Installation, Kick Panel Modification................................................................... Firewall Cover Installation, Evaporator Bracket & Evaporator Hardline Installation....................... Evaporator Bracket & Evaporator Hardline Installation (Cont.).................................................. Evaporator Installation........................................................................................................ Center Louver and Hose Adapter Installation, Drain Hose Installation........................................ Firewall Cap Installation, Lubricating O-rings, A/C Hose Installation........................................... Heater Hose & Heater Control Valve Installation......................................................................A/C and Heater Hose Routing...............................................................................................Final Steps, Glove Box Installation........................................................................................Control Panel & Duct Hose Routing........................................................................................ Wiring Diagram..................................................................................................................Gen IV Wiring Connection Instruction....................................................................................Operation of Controls..........................................................................................................Troubleshooting Guide.........................................................................................................Troubleshooting Guide (Cont.)..............................................................................................Evaporator Bracket Template................................................................................................Center Vent Template (Vintage Air Louver Only).....................................................................Passenger Side Louver Template (1967 Models Only)..............................................................Driver Side Louver Template (1967 Models Only)....................................................................Packing List.......................................................................................................................

1 2 3 4 5

6 7 8 910

11

121314151617181920212223242526272829303132

Table of Contents

3

www.vintageair.com

901167 REV D 01/13/17, PG 3 OF 32

FAN

OFF

COLD

OFF

AIR

TEM PERATURE

DEFROST

HOT

ON

DE-ICE

Packing List: Evaporator Kit (561167)

No. 1.2.

Qty.11

Part No.744005781168

DescriptionGen IV 3-Vent Evaporator Sub Case with 204 ECUAccessory Kit

** Before beginning installation, open all packages and check contents of shipment. Please report any shortages directly to Vintage Air within 15 days. After 15 days, Vintage Air will not be responsible for missing or damaged items.

NOTE: Images may not depict actual parts and quantities. Refer to packing list for actual parts and quantities.

1

2

Gen IV 3-Vent Evaporator Sub Case

with 204 ECU744005

Accessory Kit781168

4

www.vintageair.com

901167 REV D 01/13/17, PG 4 OF 32

Important Notice—Please ReadFor Maximum System Performance, Vintage Air Recommends the Following:

New Vintage Air-supplied Sanden Compressor: No additional oil needed (Compressor is shipped with proper oil charge).All Other Compressors: Consult manufacturer (Some compressors are shipped dry and will need oil added).

NOTE: Vintage Air systems are designed to operate with R134a refrigerant only. Use of any other refrigerant could damage your A/C system and/or vehicle, and possibly cause a fire, in addition to potentially voiding the warranties of the A/C system and its components.

Refrigerant Capacities:Vintage Air System: 1.8 lbs. (1 lb., 12 oz.) of R134a, charged by weight with a quality charging station or scale. NOTE: Use of the proper type and amount of refrigerant is critical to system operation and performance.Other Systems: Consult manufacturer’s guidelines.

Lubricant Capacities:

Safety Switches

Service Info:Protect Your Investment: Prior to assembly, it is critical that the compressor, evaporator, A/C hoses and fittings, hardlines, condenser and receiver/drier remained capped. Removing caps prior to assembly will allow moisture, insects and debris into the components, possibly leading to reduced performance and/or premature failure of your A/C system. This is especially important with the receiver/drier. Additionally, when caps are removed for assembly, BE CAREFUL! Some components are shipped under pressure with dry nitrogen.Evacuate the System for 35-45 Minutes: Ensure that system components (Drier, compressor, evaporator and condenser) are at a temperature of at least 85° F. On a cool day, the components can be heated with a heat gun or by running the engine with the heater on before evacuating. Leak check and charge to specifications.

Your Vintage Air system is equipped with a binary pressure safety switch. A binary switch disengages the compressor clutch in cases of extreme low pressure conditions (Refrigerant Loss) or excessively high head pressure (406 PSI) to prevent compressor damage or hose rupture. A trinary switch combines Hi/Lo pressure protection with an electric fan operation signal at 254 PSI, and should be substituted for use with electric fans. Compressor safety switches are extremely important since an A/C system relies on refrigerant to circulate lubricant.

Bolts Passing Through Cowl and/or Firewall:To ensure a watertight seal between the passenger compartment and the vehicle exterior, for all bolts passing through the cowl and/or firewall, Vintage Air recommends coating the threads with silicone prior to installation.

Heater Hose (Not Included With This Kit):Heater hose may be purchased from Vintage Air (Part# 31800-VUD) or your local parts retailer. Routing and required length will vary based on installer preference.

5

www.vintageair.com

901167 REV D 01/13/17, PG 5 OF 32

Important Wiring Notice—Please Read

Some Vehicles May Have Had Some or All of Their Radio Interference Capacitors Removed. There Should Be a Capacitor Found At Each of the Following Locations:

1. On the positive terminal of the ignition coil.2. If there is a generator, on the armature terminal of the generator.3. If there is a generator, on the battery terminal of the voltage regulator.

Most alternators have a capacitor installed internally to eliminate what is called “whining” as the engine is revved. If whining is heard in the radio, or just to be extra cautious, a radio interference capacitor can be added to the battery terminal of the alternator.

It is also important that the battery lead is in good shape and that the ground leads are not compromised. There should be a heavy ground from the battery to the engine block, and additional grounds to the body and chassis.

If these precautions are not observed, it is possible for voltage spikes to be present on the battery leads. These spikes come from ignition systems, charging systems, and from switching some of the vehicle’s other systems on and off. Modern computer-operated equipment can be sensitive to voltage spikes on the power leads, which can cause unexpected resets, strange behavior, and/or permanent damage.

Vintage Air strives to harden our products against these types of electrical noise, but there is a point where a vehicle’s electrical system can be degraded so much that nothing can help.

Radio interference capacitors should be available at most auto and truck parts suppliers. They typically are cylindrical in shape, a little over an inch long, a little over a half inch in diameter, and they have a single lead coming from one end of the cylinder with a terminal on the end of the wire, as well as a mounting clip which is screwed into a good ground on the vehicle. The specific value of the capacitance is not too significant in comparison to ignition capacitors that are matched with the coil to reduce pitting of the points.

Care must be taken, when installing the compressor lead, not to short it to ground. The compressor lead must not be connected to a condenser fan or to any other auxiliary device. Shorting to ground or connecting to a condenser fan or any other auxiliary device may damage wiring, the compressor relay, and/or cause a malfunction.

When installing ground leads on Gen IV systems, the blower control ground and ECU ground must be connected directly to the negative battery post.

For proper system operation, the heater control valve must be connected to the ECU.

•

•

•

6

www.vintageair.com

901167 REV D 01/13/17, PG 6 OF 32

Engine Compartment Disassembly

1.2.3.4.5.6.

7.8.

Disconnect battery.Remove battery and battery tray (retain) (See Figure 1, below).Drain radiator.Remove hood latch and hood latch support assembly (retain) (See Figure 1, below).Remove OEM heater hoses (discard) (See Figure 1, below).Remove OEM blower assembly (discard) (See Figure 1, below). NOTE: To remove the heater blower assembly (under hood) and the air distribution system (under dash), the factory manual recommends doing the following: Remove right lower rocker molding. Remove fender attaching bolts. Remove skirt to fender and skirt to reinforcement screws. Pull out on lower portion of fender, moving the skirt away from the fender flange and firewall. Block the skirt with a 2” x 4” block of wood. To avoid damage to paint and sheet metal, and for ease of removal and replacement of components, Vintage Air recommends that the right fender be removed, and the inner panel lowered (See Figure 1, below).Remove OEM heater wiring/vacuum harness molded grommet (discard) (See Figure 1, below).Install a 1 ½” plug into the firewall (See Figure 1a, below).

NOTE: Before starting the installation, check the function of the vehicle (horn, lights, etc.) for proper operation, and study the instructions, illustrations, & diagrams.Perform the Following:

Figure 1

Condenser Assembly and Installation1.2.

Refer to separate instructions included with the condenser kit to install the condenser.Binary switch installation (Refer to condenser instructions).

Compressor and Brackets1. Refer to separate instructions included with the bracket kit to install the compressor bracket.

Pulleys1. In most instances, the belt lengths will remain the same.

Figure 1a

Hood Latchand Support

Assembly

Radiator

HeaterHoses

Heater HoseClamp

OEMBlower Motor

Assembly OEM HeaterWiring/Vacuum Harness Molded

GrommetOuterFender

Inner Fender

Battery &Battery Tray

1 ½” Plug

7

www.vintageair.com

901167 REV D 01/13/17, PG 7 OF 32

Passenger Compartment Disassembly

1.

2.3.4.5.6.7.8.9.

10.11.12.13.

On 1968 models equipped with astro ventilation, remove the astro vents and door assemblies (Retain dash vents, but discard door assemblies).Remove the front seats (optional, for ease of A/C installation only).Remove the ashtray (retain) (See Figure 2, below).Remove the ashtray slider assembly (retain) (See Figure 2, below).Remove the glove box door (retain) (See Figure 2, below).Remove the glove box (discard, but retain the (3) Tinnerman nuts) (See Figure 2, below).Remove the center dash trim plate (retain) (See Figure 2, below).Remove the radio (retain) (See Figure 2, below).Remove the OEM control panel (retain) (See Figure 2, below).Loosen and lower steering column.Remove the instrument panel assembly (retain).Remove the OEM defrost duct (discard) (See Figure 3, below).Remove the OEM heater assembly (discard) (See Figure 3, below).

Perform the Following:

Figure 2

Figure 3

Astro Ventilation Louver(1968 Models Only)

Astro VentDoor Assembly(Passenger & Driver Side)

Astro Vents(If Equipped)(Passenger & Driver Side)

Instrument PanelAssembly

OEM Control Panel

SteeringColumn

Ashtray Slider Assembly

Ashtray

Center DashTrim Plate

Radio

Glove BoxDoor

Tinnerman Nuts

Glove Box

Defrost Duct

Heater Assembly

8

www.vintageair.com

901167 REV D 01/13/17, PG 8 OF 32

Dash Frame Modification

Trim Plate Modification

1.

1.

2.

3.

Modify the dash as shown in Figure 4, below.

Using the center louver template on Page 29, align the template onto the trim plate as shown in Figure 5, below.Mark the center louver opening and mounting holes on the trim plate. Once the center louver opening and mounting holes are marked, remove the template and carefully cut out the opening in the trim plate (See Figure 5, below).Using a 1/8” drill bit, drill the marked mounting holes on the center trim plate (See Figure 5, below).

Figure 4

Figure 5

Cut Cut Cut

CutCut

Remove Shaded Portion

Center Louver Template

Trim Plate

Mark Opening

Mark 1/8” Mounting

Holes

Drill 1/8”Mounting Holes

Cut Out Opening

9

www.vintageair.com

901167 REV D 01/13/17, PG 9 OF 32

Center Louver Installation1.2.3.

4.

Install the center louver into the trim plate as shown in Figure 6, below.Secure the center louver to the trim plate using (2) #6 x 3/8” pan head screws as shown in Figure 6, below.Using the center louver foam template on Page 29, place the template onto the provide foam strip. Trace the template onto the foam. Cut the foam as shown in Figure 7, below.Peel the paper backing from the foam, and install the foam onto the back side of the trim plate as shown in Figure 7, below.

Figure 6

Figure 7

Center Louver

(2) #6 x 3/8”Pan Head Screw

Foam

10

www.vintageair.com

901167 REV D 01/13/17, PG 10 OF 32

Evaporator Mounting Holes1.

2.

Cut out the evaporator bracket template on Page 28. Place the template onto the inner cowl under the dash by aligning the left side of the template against the dash bracket as shown in Figure 8, below. Fold the template to follow the contour of the inner cowl. Make sure the upper left hand corner of the template aligns with the left side of the defrost opening in the dash as shown in Figure 8, below.Once the template is aligned correctly, mark the mounting holes on the inner cowl. Once holes are marked in the correct location, drill (2) 3/16” holes in the inner cowl for the evaporator front mounting bracket (See Figure 8, below).

Figure 9

Figure 8

Defrost Duct & Fresh Air Cover Installation

1.

2.

Install the defrost ducts under the dash as shown in Figure 9, below. Align each defrost duct with the defrost opening in the dash, and hold in place. Using the bracket as a template, drill a 7/64” hole. Secure each defrost duct using a #10 x 1/2” sheet metal screw (See Figure 9, below).If the vehicle is equipped with astro ventilation, apply a 1/4” bead of silicone to the mating surface, and install the driver and passenger side fresh air covers, securing them using OEM hardware (See Figure 9, below).

FOLD

FOLD

TEMPLATE

Align with Dash Bracket

Align with Opening Top of

DashAlign with Fold in Inner Cowl

Mark Mounting

Holes

Inner Cowl

View ShownThrough Dash

Driver SideFresh Air Cover

498840-VCA Passenger SideFresh Air Cover

498850-VCA

(2) #10 x 1/2” Sheet Metal Screws

Driver SideDefrost Duct626675-VCA

Passenger SideDefrost Duct626675-VCA

Mating Surfaceof Fresh Air

Cover

Silicone

11

www.vintageair.com

901167 REV D 01/13/17, PG 11 OF 32

Passenger Side Dash Modification (1967 Models Only)

Driver Side Dash Modification (1967 Models Only)

1.

2.

1.

2.

Cut out the passenger side louver template on Page 30. Place the template onto the dash, aligning the left side of the template against the glove box edge, and then folding the bottom under the dash, and aligning it with the existing OEM hole as shown in Figure 10, below.Once the template is aligned correctly, use a center punch to mark the hole on the dash. Once the center of the hole is located on the dash, remove the template. Using a 2 ½” hole saw, cut a hole in the dash for the passenger side louver (See Figure 10, below).

Cut out the driver side louver template provided on Page 31. Place the template onto the dash, aligning the right side of the template against the dash to instrument panel parting line, and then folding the bottom under the dash, and aligning it with the existing OEM hole as shown in Figure 11, below.Once the template is aligned correctly, use a center punch to mark the hole on the dash. Once the center of the hole is located on the dash, remove the template. Using a 2 ½” hole saw, cut a hole in the dash for the driver side louver (See Figure 11, below).

Figure 10

Figure 11

TEMPLATE

TEMPLATE

Align with Glove Box Edge

Fold

Fold

Align withExisting OEM

Hole Under Dash

Align withExisting OEM

Hole Under Dash

Center Punchand Drill 2 ½”Diameter Hole

Center Punchand Drill 2 ½”Diameter Hole

Align with Dash to Instrument Panel

Parting Line

12

www.vintageair.com

901167 REV D 01/13/17, PG 12 OF 32

Driver & Passenger Side Louver Installation

Hose Adapter Installation(1968 Models with OEM Astro Vents Only)

1.

1.2.3.4.

Install the louver bezel through the dash opening. From behind the dash, install the hose adapter onto the louver bezel as shown in Figure 12, below.

Cut and modify the OEM astro louvers as shown in Figure 13, below.Install S-clips onto the hose adapters as shown in Figure 13a, below.Install the driver & passenger side hose adapters onto the OEM louvers (See Figure 13a, below).Reinstall the modified astro vents into the dash.

Figure 12

Figure 13a

Figure 13

Driver SideHose Adapter

Passenger SideHose Adapter

Driver SideLouver Bezel

Passenger SideLouver Bezel

OEM AstroLouver

Cut &Discard

OEMLouver

Install(3) S-clips

Hose Adapter49870-VCI

13

www.vintageair.com

901167 REV D 01/13/17, PG 13 OF 32

Figure 14

Figure 15 Figure 15a

Fresh Air Cap Installation

Kick Panel Modification

1.2.

1.2.

3.

Apply a 1/4” bead of silicone around the mating surface of the fresh air cap as shown in Figure 14, below.Attach the fresh air cap to the firewall using a 1/4-20 x 1” bolt and a 1/4” washer as shown in Figure 14, below. NOTE: The fresh air cap installs onto the engine side of the firewall.

Remove the kick panel by removing the (5) #10 x 1” pan head screws.Disconnect the fresh air door from the lever housing. Close the fresh air door assembly in the kick panel and seal the door with a 1/4” bead of silicone around the door as shown in Figure 15, below.Reinstall the kick panel using the (5) #10 x 1” pan head screws as shown in Figure 15a, below.

Fresh Air Cap49864-VCI

1/4-20 x 1” Bolt and 1/4” Washer

Mating Surfaceof Fresh Air

Cap

Silicone

OEMHeater Holein Firewall

Fresh Air Door

1/4” Beadof Silicone

#10 x 1”Pan HeadScrews

Kick PanelOEM LeverHousing

14

www.vintageair.com

901167 REV D 01/13/17, PG 14 OF 32

Evaporator Bracket & Evaporator Hardline Installation

1.2.

3.

On a workbench, install the evaporator rear bracket using (2) 1/4-20 x 1/2” hex bolts (See Figure 18, Page 15).Install the A/C and heater hardlines with properly lubricated O-rings (See Figure 23, Page 18, & Figure 18, Page 15).Install the front mounting bracket onto the evaporator using (2) 1/4-20 x 1/2” hex bolts (See Figure 17, below).

Figure 16

Figure 17

Firewall Cover Installation

1.2.3.4.

Enlarge the (4) mounting holes on the firewall to 5/16” (See Figure 16, below).Install a 3/8” grommet onto the firewall cover (See Figure 16, below).Apply a 1/4” bead of silicone around the mating surface of the firewall cover as shown in Figure 16, below.From the passenger compartment, install the firewall cover onto the firewall. From the engine compartment, secure the firewall cover to the firewall using (4) 1/4-20 x 1” hex bolts and washers as shown in Figure 16, below.

(4) 1/4-20 x 1”Hex Bolts with

WashersSilicone

Mating Surfaceof Firewall Cover

Firewall Cover

648223-FCAEnlarge

(4) Mounting Holes to 5/16”

Engine Sideof Firewall

Passenger Sideof Firewall

Evaporator Rear Bracket Evaporator

Front Bracket643169-FCB

(2) 1/4-20 x 1/2”Hex Bolts

NOTE: To ensure a watertight seal between the passenger compartment and the vehicle exterior, for all bolts passing through the firewall, Vintage Air recommends coating the threads with silicone prior to installation.

3/8” Grommet

ww

w.v

inta

gea

ir.c

om

15 901167 REV D 01/13/17, PG 15 OF 32

Evap

orat

or B

rack

et &

Ev

apor

ator

Har

dlin

e In

stal

lati

on (

Con

t.)

Fig

ure

18

(2)

1/4-

20 x

1/2

” Bol

ts(L

ocat

ed o

n Sub

Cas

e)

Rear

Eva

pora

tor

Bra

cket

6431

70-F

CB

1/4-

20 x

1 ½

”Bol

t w

ith F

lat

Was

her

3/4”

Nyl

onSpa

cer

1804

0-VU

B

1/4”

Pus

h N

utBol

t Re

tain

er#

10 O

-rin

gs

#10

O-r

ing

#6

O-r

ing

Pres

sTa

pe

#10

Har

dlin

e09

151-

PCS

#6

Har

dlin

e09

150-

PCL

Hea

ter

Line

(Eva

pora

tor

to I

ntak

e)09

152-

PCH

Hea

ter

Line

(Eva

pora

tor

to

Wat

er P

ump)

0915

3-PC

H

ECU

Mod

ule

NO

TE:

Aft

er in

stal

ling

th

e #

10

har

dlin

e, w

rap

all

exp

osed

met

al (

fitt

ing

s &

tu

be)

wit

h s

up

plie

d

pre

ss t

ape.

16

www.vintageair.com

901167 REV D 01/13/17, PG 16 OF 32

Evaporator Installation

1.

2.

3.

Lift the evaporator unit up under the dashboard, and secure it loosely to the firewall from the engine compartment using a 1/4-20 nut and a 1/4” washer (See Figure 19, below) . Using (2) #14 x 3/4” sheet metal screws, secure the front evaporator mounting bracket to the inner cowl (See Figure 19, below).NOTE: To ensure proper drainage, it is very important that the evaporator is level, both left-right and fore-aft. Check for level on the flat portions of the case around the drain.Verify that the evaporator unit is level and square to the dash; then tighten all mounting bolts. NOTE: Tighten the bolt on the firewall first. Then tighten the front mounting bracket.

NOTE: To ensure a watertight seal between the passenger compartment and the vehicle exterior, for all bolts passing through the firewall, Vintage Air recommends coating the threads with silicone prior to installation.

Figure 19

1/4-20 Nut and 1/4” Washer

Firewall

Inner Cowl

(2) #14 x 3/4”Sheet Metal

Screws

17

www.vintageair.com

901167 REV D 01/13/17, PG 17 OF 32

Center Louver and Hose Adapter Installation

1.2.

3.

Attach a 24” length of 2 ½” duct hose to the center vent hose adapter as shown in Figure 20, below.Secure the center vent hose adapter to the dash using (2) #8 x 1/2” sheet metal screws as shown in Figure 20, below.Install the trim plate onto the dash (See Figure 20, below).

Figure 20

Figure 21

Drain Hose Installation1.2.

3.

Locate the evaporator drain on the bottom of the evaporator case.In line with the drain, lightly make a mark on the firewall. Measure 1” down, and drill a 5/8” hole through the firewall (See Figure 21, below).Install the drain hose onto the outlet on the bottom of the evaporator unit, and route it through the firewall (See Figure 21, below).

TrimPlate

Duct Hose2 ½” x 24”

Center VentHose Adapter49875-VCI

1” DrainHose

EvaporatorDrain

18

www.vintageair.com

901167 REV D 01/13/17, PG 18 OF 32

Figure 22

A/C Hose Installation

1.

2.

3.

Locate the #8 compressor A/C hose. Lubricate (2) #8 O-rings (See Figure 23, above) and connect the #8 135° fitting with service port to the #8 discharge port on the compressor (See Figure 25, Page 20). Then route the 45° fitting to the #8 condenser hardline coming from under the radiator core support (See Figure 25, Page 20). Tighten each fitting connection as shown in Figure 23, above.Locate the #10 compressor A/C hose. Lubricate (2) #10 O-rings (See Figure 23, above) and connect the #10 135° fitting with service port to the #10 suction port on the compressor (See Figure 25, Page 20). Then route the straight fitting to the #10 evaporator hardline coming through the firewall (See Figure 24, Page 19). Tighten each fitting connection as shown in Figure 23, above.Locate the #6 evaporator hardline. Lubricate (2) #6 O-rings (See Figure 23, above) and connect the hardline to the #6 hardline coming under the radiator core support from the drier (See Figure 25, Page 20). Then route the other end of the hardline with lubricated O-ring to the #6 evaporator hardline coming through the firewall (See Figure 24, Page 19). Tighten each fitting connection as shown in Figure 23, above.

Standard Hose Kit:

1. Refer to separate instructions included with modified hose kit.Modified Hose Kit:

Figure ##

O-ring Installs Over Male Insert to Swaged Lip

O-ring#6 O-ring

#8 O-ring #10 O-ring

O-ring

Supplied Oil for O-rings

Male Insert

Female Nut

Hold With This Wrench

Twist With This Wrench

Lubricating O-rings For a proper seal of fittings: Install supplied O-rings as shown, and lubricate with supplied oil.

NOTE: Standard torque specifications:#6: 11 to 13 ft-lb.#8: 15 to 20 ft-lb.

#10: 21 to 27 ft-lb.

Figure 23

Firewall Cap Installation1.2.

Apply a 1/4” bead of silicone around the mating surface of the firewall cap as shown in Figure 22, below.Pass the lines through the firewall cap, and secure the cap using (3) #10 x 1/2” sheet metal screws (See Figure 22, below).

Mating Surface of

Firewall Cap

SiliconeFirewall Cap648225-FCR

(3) #10 x 1/2”Sheet Metal

Screws

19

www.vintageair.com

901167 REV D 01/13/17, PG 19 OF 32

Heater Hose & Heater Control Valve Installation

1.

2.

3.

Route a piece of heater hose from the lower heater core fitting to the water pump (See Figure 24, below, & Figure 25, Page 20). Secure using hose clamps.Route a piece of heater hose from the intake to the heater control valve, and from the heater control valve to the upper heater core fitting (See Figure 24, below, & Figure 25, Page 20). NOTE: Install the heater control valve in line with the intake manifold (pressure side) heater hose, and secure using hose clamps. Also note proper flow direction. Use #2 and #10 Adel clamps to secure the #6 evaporator/core support hardline and the #10 suction hose to the inner fender as shown in Figure 25, Page 20. Secure the Adel clamps to the inner fender using a 10-32 x 1/2” pan head screw and a 10-32 nut (See Figure 25a, Page 20).

Figure 24

PressTape#10 Hardline

(Insulated)09151-PCS

ExpansionValve

#6 Hardline09150-PCL

Heater Line(Intake)

09152-PCH

Heater Line(Water Pump)09153-PCH

Firewall Cap

Heater ControlValve

#10 O-ring

#6 O-ring

HeaterHoses

NOTE: Flow Direction Follows Molded Arrow on Valve.

#10 Suction Hose

From Heater Control Valve to Evaporator

From Evaporator to Water Pump#6 Hardline

091694-FFL

From Intake Manifold

ww

w.v

inta

gea

ir.c

om

20 901167 REV D 01/13/17, PG 20 OF 32

A/

C a

nd

Hea

ter

Hos

e R

outi

ng

NO

TE:

Vin

tag

e A

ir S

yste

ms

use

5/

8”

hea

ter

con

nec

tion

s. O

n e

ng

ines

eq

uip

ped

wit

h 3

/4

” h

ose

nip

ple

s, t

hes

e w

ill n

eed

to

be

rem

oved

an

d r

epla

ced

wit

h 5

/8

” n

ipp

les

(not

su

pp

lied

). F

or w

ater

p

um

ps

wit

h a

cas

t-in

3/

4”

hea

ter

outl

et,

a 3

/4

” x

5/

8”

red

uce

r fi

ttin

g (

not

su

pp

lied

) w

ill n

eed

to

be

inst

alle

d in

th

e h

eate

r h

ose.

#10

Ade

l Cla

mp

#10

Suc

tion

Hos

e09

1068

#8

Dis

char

ge

Hos

e09

0167

#2

Ade

lCla

mp

Inne

rFe

nder

wel

l10

-32

x 1/

2”Pa

n H

ead

Scr

ewan

d 10

-32

Nut

#6

Evap

orat

orH

ardl

ine

0916

94-F

FL

#6

Evap

orat

orH

ardl

ine

0916

94-F

FL

Hea

ter

Hos

e(H

eate

r Con

trol

Valv

e/In

take

)

#10

Suc

tion

Hos

eH

eate

r H

ose

(Hea

ter

Cor

e/W

ater

Pum

p)

Alte

rnat

orSup

port

#8

Con

dens

er/C

ore

Har

dlin

e35

367-

VCG

#6

Drier

/Fen

derw

ell

Har

dlin

e35

067-

VCG

#6

Con

dens

er/

Drier

Har

dlin

e35

368-

VCG

Com

pres

sor

Saf

ety

Switc

h(B

inar

y Ty

peScr

ew-o

n D

rier

)(R

efer

to

Con

dens

er

Inst

ruct

ions

)Fi

gu

re 2

5

Fig

ure

25

a

InO

ut

21

www.vintageair.com

901167 REV D 01/13/17, PG 21 OF 32

Figure 27

Figure 26

Final Steps1.2.

3.4.

5.6.7.

8.9.

10.

11.12.

Install the duct hoses as shown in Figure 28, Page 22.Route the A/C wires (12 volt/ground/binary switch/heater control valve) through the 3/8” grommet (See Figure 26, below).Install the control panel assembly. Refer to the control panel instructions.Plug the wiring harnesses into the ECU module on the sub case as shown in Figure 28, Page 22. Wire according to the wiring diagrams on Pages 23 & 24.Refer to the instructions below to install the glove box.Reinstall all previously removed items.Fill radiator with at least a 50/50 mixture of approved antifreeze and distilled water. It is the owner’sresponsibility to keep the freeze protection at the proper level for the climate in which the vehicle is operated. Failure to follow antifreeze recommendations will cause heater core to corrode prematurely and possibly burst in A/C mode and/or freezing weather, voiding your warranty.Double check all fittings, brackets and belts for tightness.Vintage Air recommends that all A/C systems be serviced by a licensed automotive A/C technician.Evacuate the system for a minimum of 45 minutes prior to charging, and perform a leak check prior to servicing.Charge the system to the capacities stated on Page 4 of this instruction manual.See Operation of Controls procedures on Page 25.

Glove Box Installation1.

2.

3.

4.

Locate the (3) Tinnerman nuts previously removed from the original glove box shell, and slide them onto the door hinge holes on the dash (See Figure 27, below).Insert the bottom half of the new glove box into the glove box opening, and secure it to the dash with (1) OEM screw on each side of the glove box (See Figure 27, below).Attach the top half of the glove box to the bottom half using (4) #6 x 3/8” pan head screws (See Figure 27, below).Reinstall the glove box door using (3) OEM screws through the Tinnerman nuts (See Figure 27, below).

Glove BoxTop

Glove BoxBottom

OEMScrews

OEMScrews

(3) TinnermanNuts

Grommet

(4) #6 x 3/8”Pan Head Screws

22

www.vintageair.com

901167 REV D 01/13/17, PG 22 OF 32

Figure 28

Control Panel & Duct Hose Routing

Driver SideDefrost Duct

2” x 20”

Passenger SideDefrost Duct

2” x 16”

Center Louver2 ½” x 24”

Passenger SideLouver

2 ½” x 40”

Driver Side Louver

2 ½” x 28”

Plug FromWiring

Harness232600-VUA

Plug FromControl Wiring

Harness232002-VUA

23

www.vintageair.com

901167 REV D 01/13/17, PG 23 OF 32

WHT/GRN

WHT/YELWHT/RED

RED

WHTBACKLIGHT NEG

FAN WIPER

MODE WIPER

TEMP WIPER

5V-SW

GND

BACKLIGHT POS

AC ANNUNCIATOR

PRE-WIRED

GEN IV WIRING DIAGRAMREV D, 5/6/2014

GEN IV ECU

PROGRAM

Wiring Diagram

TEMP

MODE

FAN

A/C(IF USED)

232007-VUR

232002-VUA

** CIRCUITBREAKER30 AMP

*** WIDE OPENTHROTTLESWITCH

(OPTIONAL)

* DASH LAMP(IF USED)

Dash Lamp Is Used Only With Type 232007-VUR Harness.Warning: Always Mount Circuit Breaker As Close to the Battery As Possible. (NOTE: Wire BetweenBattery and Circuit Breaker Is Unprotected and Should Be Carefully Routed to Avoid a ShortCircuit).Wide Open Throttle Switch Contacts Close Only at Full Throttle, Which Disables A/C Compressor.

JF8

BLK

ORA

TAN

VIEWED FROM WIRE SIDE

••

•

HEATERCONTROL VALVE

24

www.vintageair.com

901167 REV D 01/13/17, PG 24 OF 32

RED

CIRCUIT BREAKER30 AMP

+

+

-

BLACK

REDWHITE

RED

CHASSIS GROUND

A/CCOMPRESSOR

RELAY

Ignition Switch:

Dash Light:

NOTE: MOUNT RELAYIN DESIRED LOCATION

UNDER DASH

GREEN

FIREWALL

BLUE

BLUE

RED &

WHITE

VIOLET

(IGNITION HOTTERMINAL)

IGNITION SWITCH

DASH BACK LIGHT+0-12vTAN

GRAY

BLUE

WHITE

WHITE

REDRED

WHITE

COMPRESSOR

BATTERY

NOTE: CONNECT WHITEWIRES DIRECTLY TO

(-) BATTERY TERMINAL

BATRUN

12V

RED GREEN

RED

RED

BLUE

LATCH

BLACK

BINARYSAFETYSWITCH

YELLOW

ORANGE

WIRING HARNESS

Violet 12V Ign Switch Source (Key On Accessory) Position Must Be Switched.

Tan Wire Used Only With Vintage Air Supplied Control Panel With LED Back Light.

Binary: Connect As Shown (Typical Compressor Wiring). Be Sure Compressor Body Is Grounded.

Trinary Switch: Connect According To Trinary Switch Wiring Diagram.

Install With Servo Motor Facing Down, As Shown. Note Flow Direction Arrow Molded Into Valve Body, And Install Accordingly.

White Must Run To (-) Battery. Red May Run To (+) Battery Or Starter. Mount Circuit Breaker As Close to Battery As Possible.

Heater Control Valve:

Binary/Trinary & Compressor:

Circuit Breaker/Battery:

CONTROL WIRING HARNESS

NOTE: YELLOW & ORANGE

COMING FROM HARNESS ARE NOT

USED.

WIRING HARNESS

GRAY WIRE IS USED FOR PROGRAMING CONTROLS

IF APPLICABLE

WIRING HARNESS

Gen IV Wiring Connection Instruction

HEATERCONTROL VALVE

WARNING: ALWAYS MOUNT CIRCUIT BREAKER

AS CLOSE TO THE BATTERY AS POSSIBLE. (NOTE: WIRE BETWEEN BATTERY AND CIRCUIT BREAKER IS UNPROTECTED

AND SHOULD BE CAREFULLY ROUTED TO AVOID A SHORT CIRCUIT).

NOTE: HEATER CONTROL VALVE CONNECTION AND CHASSIS GROUND MAY BE LOCATED ON EITHER SIDE OF THE FIREWALL. ENSURECONNECTOR IS LATCHED

FIRMLY.

25

www.vintageair.com

901167 REV D 01/13/17, PG 25 OF 32

Operation of Controls

Adjust to desiredspeed.

Blower SpeedAdjust to desired

speed.

Adjust to desiredmode position (DASH position recommended).

Adjust to desiredspeed.

Adjust to DEFROST position for maximum defrost, or between FLOOR and DEFROST positions for a bi-level

blend (Compressor is automatically engaged).

Adjust to desired temperature.

For A/C operation, adjust tocoldest position to engage

compressor (Adjust between HOT and COLD to reachdesired temperature).

A/C Operation

Heat Operation

Defrost/De-fog Operation

On Gen IV systems with three lever/knob controls, the temperature control toggles between heat and A/C operations. To activate A/C, move the temperature lever/knob all the way to cold and then back it off to the desired vent temperature. For heat operation, move the temperature lever/knob all the way to hot and then adjust to the desired vent temperature. The blower will momentarily change speed, each time you toggle between operations, to indicate the change. NOTE: For proper control panel function, refer to control panel instructions for calibration procedure.

Blower Speed

Blower Speed

This lever/knob controlsblower speed, from

OFF to HI.

This lever/knob controls the mode positions,from DASH to FLOORto DEFROST, with a blend in between.

This lever/knob controlsthe temperature,

from HOT to COLD.

Blower Speed

Mode Control

Temperature Control

Temperature Control

Temperature Control

Temperature Control

Mode Control

Mode Control

Mode Control

For maximum heating, adjust to hottest position (Adjust between HOT and COLD to reach desired temperature).Adjust to desired

mode position(FLOOR position recommended).

DASH

DASH

DASH

HOT

HOT

HOT

HI

HI

HI

DASH

HOT

HI

Blower Speed

TemperatureControl

ModeControl

ww

w.v

inta

gea

ir.c

om

26 901167 REV D 01/13/17, PG 26 OF 32

Sym

pto

m

C

on

dit

ion

C

heck

s

Act

ion

s

N

ote

s

Blo

wer

sta

ys o

n

hig

h s

pee

d w

hen

ig

nitio

n is

on.

1a.

No o

ther

funct

ions

work

.

Chec

k fo

r dam

aged

pin

s or

wires

in c

ontr

ol hea

d p

lug.

Ver

ify

that

all

pin

s ar

e in

sert

ed into

plu

g.

Ensu

re t

hat

no

pin

s ar

e ben

t or

dam

aged

in E

CU

.

Chec

k fo

r dam

aged

gro

und

wire

(white)

in c

ontr

ol hea

d

har

nes

s.

Ver

ify

continuity

to c

has

sis

gro

und w

ith w

hite

contr

ol

hea

d w

ire

at v

ario

us

poin

ts.

Loss

of gro

und o

n t

his

wire

render

s co

ntr

ol hea

d

inoper

able

.

All

oth

er f

unct

ions

work

.Chec

k fo

r dam

aged

blo

wer

sw

itch

or

pote

ntiom

eter

and

asso

ciat

ed w

irin

g.

Blo

wer

sta

ys o

n

hig

h s

pee

d w

hen

ig

nitio

n is

on o

r off.

Unplu

g 3

-wire

BSC c

ontr

ol

connec

tor

from

ECU

. If

blo

wer

sh

uts

off,

ECU

is

eith

er

impro

per

ly w

ired

or

dam

aged

.

Be

sure

the

smal

l, 2

0 G

A w

hite

gro

und w

ire

is c

onnec

ted

to t

he

bat

tery

gro

und p

ost

. If

it

is,

repla

ce t

he

ECU

.

Unplu

g 3

-wire

BSC c

ontr

ol

connec

tor

from

ECU

. If

blo

wer

st

ays

runnin

g,

BSC is

eith

er

impro

per

ly w

ired

or

dam

aged

.

Chec

k to

ensu

re t

hat

no B

SC w

irin

g is

dam

aged

or

short

ed t

o v

ehic

le g

round.

The

BSC o

per

ates

the

blo

wer

by

gro

und s

ide

puls

e w

idth

modula

tion s

witch

ing.

The

posi

tive

wire

to t

he

blo

wer

will

alw

ays

be

hot.

If th

e “g

round”

side

of

the

blo

wer

is

short

ed t

o c

has

sis

gro

und,

the

blo

wer

will

run o

n H

I.

Rep

lace

BSC (

This

will

req

uire

rem

oval

of

evap

ora

tor

from

veh

icle

).N

o o

ther

par

t re

pla

cem

ents

sh

ould

be

nec

essa

ry.

Com

pre

ssor

will

not

turn

on

(All

oth

er funct

ions

work

).

2.

Sys

tem

is

not

char

ged

.Sys

tem

must

be

char

ged

for

com

pre

ssor

to e

ngag

e.Char

ge

syst

em o

r byp

ass

pre

ssure

sw

itch

.

Dan

ger:

Never

byp

ass

sa

fety

sw

itch

wit

h

en

gin

e r

un

nin

g.

Seri

ou

s in

jury

can

resu

lt.

Sys

tem

is

char

ged

.

1b

.

Tro

ub

lesh

oo

tin

g G

uid

e

Chec

k fo

r fa

ulty

A/C

pote

ntiom

eter

or

asso

ciat

ed

wirin

g (

Not

applic

able

to 3

-pot

contr

ols

).

Chec

k fo

r dis

connec

ted o

r fa

ulty

ther

mis

tor.

Chec

k co

ntinuity

to g

round o

n w

hite

contr

ol hea

d w

ire.

Chec

k fo

r 5V o

n r

ed c

ontr

ol hea

d w

ire.

Chec

k 2-p

in c

onnec

tor

at E

CU

housi

ng.

To c

hec

k fo

r pro

per

pot

funct

ion,

chec

k vo

ltag

e at

w

hite/

blu

e w

ire.

Voltag

e sh

ould

be

bet

wee

n 0

V a

nd

5V,

and w

ill v

ary

with p

ot

leve

r posi

tion.

Dis

connec

ted o

r fa

ulty

ther

mis

tor

will

cau

se

com

pre

ssor

to b

e dis

able

d.

Red

wire

at A

/C p

ot

should

hav

e ap

pro

xim

atel

y 5V

with ignitio

n o

n.

White

wire

will

hav

e co

ntinuity

to

chas

sis

gro

und.

White/

Blu

e w

ire

should

var

y bet

wee

n 0

V a

nd 5

V w

hen

le

ver

is m

oved

up o

r dow

n.

3. Com

pre

ssor

will

not

turn

off

(A

ll oth

er funct

ions

work

).

Chec

k fo

r fa

ulty

A/C

pote

ntiom

eter

or

asso

ciat

ed

wirin

g.

Chec

k fo

r fa

ulty

A/C

rel

ay.

Rep

air

or

repla

ce p

ot/

contr

ol w

irin

g.

Rep

lace

rel

ay.

See

blo

wer

sw

itch

chec

k pro

cedure

.

ww

w.v

inta

gea

ir.c

om

27 901167 REV D 01/13/17, PG 27 OF 32

Sym

pto

m

C

on

dit

ion

Ch

eck

s

Act

ion

s

N

ote

s

Sys

tem

will

not

turn

on,

or

runs

inte

rmitte

ntly.

4.

Work

s w

hen

engin

e is

not

runnin

g;

shuts

off w

hen

en

gin

e is

sta

rted

(T

ypic

ally

ear

ly G

en I

V,

but

poss

ible

on a

ll ve

rsio

ns)

.

Nois

e in

terf

eren

ce f

rom

either

ig

nitio

n o

r al

tern

ator.

Inst

all ca

pac

itors

on ignitio

n c

oil

and a

lter

nat

or. E

nsu

re

good g

round a

t al

l poin

ts.

Rel

oca

te c

oil

and a

ssoci

ated

w

irin

g a

way

fro

m E

CU

and E

CU

wirin

g.

Chec

k fo

r burn

edor

loose

plu

g w

ires

.

Ver

ify

connec

tions

on p

ow

er

lead

, ig

nitio

n lea

d,

and b

oth

white

gro

und w

ires

.

Ver

ify

pro

per

met

er f

unct

ion b

y ch

ecki

ng t

he

conditio

n o

f a

know

n g

ood b

atte

ry.

Ignitio

n n

ois

e (r

adia

ted o

rco

nduct

ed)

will

cau

se t

he

syst

em t

o s

hut

dow

n d

ue

tohig

h v

oltag

e sp

ikes

. If

this

is s

usp

ecte

d,

chec

k w

ith a

qual

ity

osc

illosc

ope.

Spik

esgre

ater

than

16V w

ill s

hut

dow

n t

he

ECU

. In

stal

l a

radio

cap

acitor

at t

he

posi

tive

post

of th

e ig

nitio

nco

il (S

ee r

adio

cap

acitor

inst

alla

tion b

ulle

tin).

A

faulty

alte

rnat

or

or

worn

out

bat

tery

can

als

o r

esult

in t

his

conditio

n.

Will

not

turn

on u

nder

an

y co

nditio

ns.

Ver

ify

bat

tery

voltag

e is

gre

ater

than

10 v

olts

and les

sth

an 1

6.

Loss

of m

ode

door

funct

ion.

No m

ode

chan

ge

at a

ll.Chec

k fo

r dam

aged

mode

switch

or

pote

ntiom

eter

and

asso

ciat

ed w

irin

g.

Part

ial fu

nct

ion o

f m

ode

doors

.

Typic

ally

cau

sed b

y ev

apora

tor

housi

ng

inst

alle

d in a

bin

d in t

he

vehic

le.

Be

sure

all

mounting loca

tions

line

up

and d

on’t h

ave

to b

e fo

rced

in

to p

osi

tion.

Blo

wer

turn

s on

and o

ff r

apid

ly.

6.

Bat

tery

voltag

e is

at

leas

t 12V.

Chec

k fo

r at

lea

st 1

2V a

t ci

rcuit b

reak

er.

Ensu

re a

ll sy

stem

gro

unds

and p

ow

er c

onnec

tions

are

clea

n a

nd t

ight.

Bat

tery

voltag

e is

les

s th

an 1

2V.

5.

Tro

ub

lesh

oo

tin

g G

uid

e (

Co

nt.

)

Chec

k fo

r fa

ulty

bat

tery

or

alte

rnat

or.

Char

ge

bat

tery

.

Sys

tem

shuts

off b

low

er a

t 10V.

Poor

connec

tions

or

wea

k bat

tery

can

cau

se

shutd

ow

n a

t up t

o 1

1V.

7. When

ignitio

n is

turn

ed o

n,

blo

wer

m

om

enta

rily

co

mes

on,

then

sh

uts

off.

This

occ

urs

with t

he

blo

wer

sw

itch

in

the

OFF

posi

tion.

This

is

an indic

ator

that

the

syst

em h

as b

een r

eset

. Be

sure

the

red p

ow

er w

ire

is o

nth

e bat

tery

post

, an

d n

ot

on a

sw

itch

ed s

ourc

e. A

lso,

if

the

syst

em is

pulle

d b

elow

7V f

or

even

a s

plit

sec

ond,

the

syst

em w

ill r

eset

.

Run r

ed p

ow

er w

ire

direc

tly

to b

atte

ry.

Chec

k fo

r posi

tive

pow

er a

t hea

ter

valv

e gre

en w

ire

and

blo

wer

red

wire.

Chec

k fo

r gro

und o

n c

ontr

ol hea

d w

hite

wire.

Chec

k fo

r obst

ruct

ed o

r bin

din

g m

ode

doors

.

Chec

k fo

r dam

aged

ste

pper

m

oto

r or

wirin

g.

Err

atic

funct

ions

of

blo

wer

, m

ode,

te

mp,

etc.

Chec

k fo

r dam

aged

sw

itch

or

pot

and a

ssoci

ated

wirin

g.

Rep

air

or

repla

ce.

8.

28

www.vintageair.com

901167 REV D 01/13/17, PG 28 OF 32

NO

TE:

Du

e to

pri

nti

ng

var

ian

ces,

mea

sure

th

e lin

e b

elow

bef

ore

usi

ng

th

is t

emp

late

. If

te

mp

late

is s

cale

d p

rop

erly

, th

e lin

e sh

ould

mea

sure

6 in

ches

.

Evaporator Bracket Template

Fold

Dot

ted

Line

Fold

Dot

ted

Line

Cut

Alo

ng

Dot

ted

Line

Cut

Alo

ng

Dot

ted

Line

4 13⁄

16”3

½”

Mar

k &

Drill

3/16

” H

oles

29

www.vintageair.com

901167 REV D 01/13/17, PG 29 OF 32

Center Vent Template (Vintage Air Louver Only)

Mar

k &

Drill

3/16

” H

oles

4-1

1/1

6"

NO

TE:

Du

e to

pri

nti

ng

var

ian

ces,

mea

sure

th

e lin

e b

elow

bef

ore

usi

ng

th

is t

emp

late

. If

te

mp

late

is s

cale

d p

rop

erly

, th

e lin

e sh

ould

mea

sure

6 in

ches

.

1 ⅝”

Center Vent

Center VentCut Out onDotted Line

Cut Out onDotted Line

Cut Out on Dotted Line and Place on Face of Trim Plate.Mark and Cut Hole.

Top

FoamTemplate

Template for Cutting Hole in Trim Plate for Vintage Air Center Louver Installation

Cut Supplied Foam to Match Template. Peel the Protective Backing and stick onto the Back Side

of the Trim Plate.

30

www.vintageair.com

901167 REV D 01/13/17, PG 30 OF 32

Passenger Side Louver Template (1967 Models Only)

NOTE: Due to printing variances, measure the line below before using this template. If template is scaled properly, the line should measure 6 inches.

Glove BoxEdge

Cut

Cut

Fold Under Dash at Dotted Line

Center Punchand Drill 2 ½”Diameter Hole

Passenger Side

Align withExisting

OEM HoleUnder Dash

31

www.vintageair.com

901167 REV D 01/13/17, PG 31 OF 32

Driver Side Louver Template (1967 Models Only)

Center Punchand Drill 2 ½”Diameter Hole

Align withExisting

OEM HoleUnder Dash

NOTE: Due to printing variances, measure the line below before using this template. If template is scaled properly, the line should measure 6 inches.

Cut

Cut

Fold Under Dash at Dotted Line

Align this Edgewith the Dash toInstrument Panel

Parting Line

Driver Side

32

www.vintageair.com

901167 REV D 01/13/17, PG 32 OF 32

FAN

OFF

COLD

OFF

AIR

TEM PERATURE

DEFROST

HOT

ON

DE-ICE

Packing List: Evaporator Kit (561167)

No. 1.2.

Qty.11

Part No.744005781168

DescriptionGen IV 3-Vent Evaporator Sub Case with 204 ECUAccessory Kit

NOTE: Images may not depict actual parts and quantities. Refer to packing list for actual parts and quantities.

1

2

Accessory Kit781168

Checked By:Packed By:

Date:

Gen IV 3-Vent Evaporator Sub Case

with 204 ECU744005