GOGGLES, IMAGE INTENSIFIED, GENERAL PURPOSE, CASED Ll A2 · 2019. 10. 17. · the image intensifier tube (ht) contained in the goggles may retain a potential of up to 10 kv between

ARMY EQUIPMENT lift-FIEST-RteT-ED- 5855-G-100-523 2nd Edition May 1997

(Superseding 1st Edition February 1984) SUPPORT PUBLICATION

1

CONDITIONS OF RELEASE

2 Thie--infeffitectieti must be-sccarded-tbe-same-degree-et-seetnity-mieetten-as-tnet•

neeenied-therete-by-the-414-Gevennnent.

3 This-infarmation-nray-be-disetesed-only-within-the-Defenee-Depattment-et-the-feetpient

Government-extept-as-etnerwiee-euthefited-by-tne-MInistny-sf7Defenee-(Annyi.

This information may be subject to privately owned rights.

GOGGLES, IMAGE INTENSIFIED, GENERAL PURPOSE,

CASED Ll A2

FAILURE DIAGNOSIS

REPRINTED INCORPORATING AMDT 1

TI I IS DOSUfs1 lB 1-1E-PROPEIR-121-9P-14Eft-1341:PANNIG MAJESTYS GOVERNMEN,

arrct- issued- far- ifTe- information- of- such-persons-only-es-need-te-knew--ite mom* In

the-eebrse-ef--their (4%W-duties: A-ny- persdn--ftnding-this-deetnnent-sheutel--blindit- is

to-a-British fees tinit-te-to-a-poliee---statiort-fer-its-safe-return-te-the-MINISTFW-GF

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its eentents-are-clistioseel-only-te-autherirefl-pereptnq ,

BY COMMAND OF THE DEFENCE COUNCI

Ministry of Defence Issued by

ARMY TECHNICAL SUPPORT AGENCY DIRECTORATE OF TECHNICAL SERVICES

141E-REST-MG-T-ED- Page (i)/(i0

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ARMY EQUIPMENT SUPPORT PUBLICATION

UK RESTrlICTED 5855-G-100-523 2nd Edition

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AMENDMENT RECORD

Amdt No.

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ARMY EQUIPMENT 5855-G-100-523

SUPPORT PUBLICATION CONTENTS

Preliminary material Page

Title page (i)/(ii)

Amendment record (iii)/(iv)

Contents (this page) (v)

Warnings (vi)

Cautions (vii)/(viii)

Para

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1 Special tools and test equipment 2 Adhesives, sealants and solvents

Dismantling 3 Neutral density fitter 4 Objective lens assembly 5 Image intensifier tube housing (WARNING) 6 Image intensifier tube 7 Switch assembly 8 Collimator 9 Rubber eyecup

10 Eyepiece 11 Focus grip 12 Battery cap spring 13 Cantilever sub assembly 14 Faceframe sub assembly 15 Facepad 16 Infra red emitting diode sub assembly 17 Light emitting diode

Cleaning and examination 18 Cleaning (CAUTION)

Examination 20 Objective assembly 23 Image intensifier tube housing 28 Collimator 31 Eyepiece

Repair and replacement 32 General 33 Focus grip 34 Objective lens assembly 37 Image intensifier tube housing 52 Image intensifier tube 53 Eyeguard 54 Eyepiece assembly 60 Collimator sub assembly 63 Switch knob 65 Switch 71 Infra red light emitting diode sub assembly 72 Light emitting diode 73 Battery cap spring 74 Tests after reassembly 75 Adjustments

(continued)

Nov 2000 (Arndt 1) UK RESTRICTED Page (v)

5855-G-100-523 UK RCSTRICTCD ARMY EQUIPMENT SUPPORT PUBLICATION

CONTENTS (continued)

Table Page

1 Special tools and test equipment 1 2 Adhesives, sealants and solvents 1 3 Shim selection 13

Fig Page

1 Goggles with interface (LH view) 2 2 Goggles with interface (RH view) 3 3 Objective assembly 3 4 IIT housing (front view) 4 5 Collimator wiring 5 6 IIT housing (sectional view) 5 7 Switch assembly 6 8 Eyepiece 7 9 Headmount 8

10 Shim selection diagram 12 11 IIT and connector 14 12 Switch and knob orientation 15 13 LED wiring 16 14 Wiring diagram 17 15 Eyepiece adjustment 18

ANNEXES

Annex

A Detailed repair policy - repair charts

WARNINGS

(1) TOXIC GASES. THESE BATTERIES ARE CAPABLE OF GENERATING TOXIC GASES AT HIGH PRESSURE AND MAY BURST IF THEY ARE SUBJECT TO EXCESSIVE HEAT, SHORT CIRCUIT OR IF DISCHARGED WELL BEYOND THEIR NORMAL WORKING LIFE.

(2) DISCHARGED BATTERIES. BATTERIES WHICH HAVE BEEN DISCHARGED SO THAT THEY WILL NO LONGER OPERATE MUST BE PROMPTLY REMOVED AND RETURNED TO STORES. THEY MUST NOT BE BURIED, BURNED, PLACED ON A FIRE, OR PLACED IN ANY RECEPTACLE SUPPLIED FOR ANY OTHER WASTE.

(3) PERSONNEL HAZARD. LITHIUM BATTERIES MUST NOT BE OPENED.

(4) BATTERY DISPOSAL. UNSERVICEABLE BATTERIES MUST BE RETURNED THROUGH STORES CHANNELS FOR DISPOSAL. THEY MUST BE SO PACKED AS TO PREVENT ACCIDENTAL SHORT CIRCUITING. THE PACKAGE AND ACCOMPANYING CORRESPONDENCE MUST BE CLEARLY MARKED 'UNSERVICEABLE LITHIUM BATTERIES FOR DISPOSAL'.

(5) HIGH VOLTAGE. THE IMAGE INTENSIFIER TUBE (IIT) CONTAINED IN THE GOGGLE MAY RETAIN A POTENTIAL OF UP TO 10 kV BETWEEN INPUT AND OUTPUT WINDOWS. THE TUBE ASSEMBLY MUST NOT BE REMOVED UNTIL THE GOGGLE HAS BEEN SWITCHED OFF FOR AT LEAST 15 MINUTES. WHEN REMOVED THE TUBE ASSEMBLY SHOULD BE HANDLED WITH CARE AND SHOULD NOT BE DISCHARGED BY SHORTING THE TWO TUBE CONTACTS TOGETHER.

Page (vi) UK ncsTrucTED Nov 2000 (Amdt 1)

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ARMY EQUIPMENT -1i4E-REST-RIG-T-E49 5855-G-100-523

SUPPORT PUBLICATION 2nd Edition

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CAUTIONS

(1) SEALED INSTRUMENT. The equipment is a sealed instrument and the user must not

tamper with, or strip the equipment, in excess of that shown in AESP 5855-G-100-201.

(2) CLEANING DAMAGE. Dirt or moisture entering the equipment will badly affect its

performance. Great care must be taken to avoid scratching the glass surfaces during cleaning.

No attempt should be made to wipe off mud or grit in a dry state. DO NOT use petroleum spirit

to clean glass surfaces.

(3) BRIGHT LIGHT. The photocathode or UT may be damaged if bright light either natural

or artificial, is allowed to enter the objective system. In daylight and when the equipment is

not in use the Neutral Density (ND) filter must be fitted.

(4) DISCHARGED BATTERIES. Remove discharged batteries from the equipment and return

the batteries to stores. Remove batteries from the equipment before returning to stores; return

the batteries to stores.

(5) BATTERY LIFE. Continuous use of the infra-red light source will reduce the life of the

battery.

(6) LIGHT SOURCE. Inadvertent switching on of the infra-red light source could reveal the

position of an operator to the enemy.

(7) EQUIPMENT DAMAGE. Lithium batteries used in this equipment must not be recharged.

May 97 4114-RiST-RIG-T-E9- Page (vii)/(viii)

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SPECIAL TOOLS AND TEST EQUIPMENT

1 The Special Tools and Test Equipment (SITE) required to carry out the repairs detailed in this

category are listed at Table 1.

TABLE 1 SPECIAL TOOLS AND TEST EQUIPMENT

Serial (1)

Catalogue No. (2)

Designation

(3)

Qty (4)

1 6650-99-782-4465/66 Collimator, General Purpose, L2A1/L2A2 1

2 6685-99-962-5713 Leak Detector Kit 1

3 4440-99-965-7190 Dehydrator Desiccant Electric 28V Series 7 Mk 2 1

OR

4440-99-964-8511 Dehydrator Desiccant Electric Series 3 Mk 3 1

4 5855-99-967-0246 Spanner, Wrench 1

5 5855-99-967-0417 Diode Insertion Tool 1

6 4931-99-965-2409 Telescope Dioptre Setting 1

7 5210-99-955-1730 Gauge, Depth Micrometer 0-3in. 1

8 3649-99-206-3694 Bench, Laminair 1

9 5180-99-130-2083 Tool Kit, Instrument Technician Basic 1

ADHESIVES, SEALANTS AND SOLVENTS

2 Adhesives, sealants and solvents required to carry out the repairs detailed in this category are listed

at Table 2.

TABLE 2 ADHESIVES, SEALANTS AND SOLVENTS

Serial (1)

Catalogue No. (2)

Designation (3)

Qty (4)

1 6810-99-220-0965 Isopropyl Alcohol As reqd

2 6640-99-961-6291 Lens Cleaning Tissue As reqd

3 5510-99-122-3709 Cotton Wool As reqd

4 5805-99-447-3053 Pegwood As reqd

5 6810-99-220-0984 Methylated Spirit Absolute As reqd

6 6810-99-220-0481 Acetone As reqd

7 8030-99-224-1397 Silcoset 105 As reqd

8 8030-99-225-0471 Silcoset 153 As reqd

9 9150-99-910-0610 Grease XG271 (Aeroshell No.6) As reqd

10 8030-99-220-2370 Universal Jointing Compound As reqd

11 8010-99-942-8917 Varnish, Red, Anti Tracking As reqd

12 8030-99-225-1104 RTV 732 As reqd

May 97 -411C-RESTRICTEB- Page 1

5855-G-100-523 -0K-REST-Rfe-T-ED ARMY EQUIPMENT SUPPORT PUBLICATION

DISMANTLING

Neutral density filter

3 To remove the Neutral Density (ND) fitter (Fig 1(10)) proceed as follows:

3.1 Push the filter housing forward out of the focus grip (9).

Objective lens assembly

4 To remove the objective lens assembly (Figs 2 and 3) proceed as follows:

4.1 Remove purging screw and bonded seal (Fig 2(1)). This is a red headed screw.

4.2 Remove the three M2.5 countersunk screws (2).

4.3 Withdraw the objective lens assembly from the Image Intensifier Tube (IIT) housing by pulling the objective lens assembly forward, away from the IIT housing.

4.4 The roof seal (Fig 3(2)) may now be removed if necessary, by carefully lifting it out of its groove.

Page 2

GPG/004

1 Cantilever sub assembly 6 Battery cap 2 Screws (4 off) 7 Tube housing 3 Strap, neck 8 Screws (3 off) 4 Eyepiece 9 Focus grip 5 Collimator 10 ND filter

Fig 1 Goggles with interface (LH view)

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tite-REST-Rte-TED- 5855-G-100-523

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1 Purging screw 2 Screw, (3 off)

Fig 2 Goggles with interface (RH view)

1 Focus grip 2 Roof seal

3 Stop pin 4 Focus ring

Fig 3 Objective assembly

PPE 8304-135K

PPE 8304-134C

-WE -RESTRICTED- Page 3

5855-G-100-523 4114-RESTRIGTE-434- ARMY EQUIPMENT SUPPORT PUBLICATION

Image intensifier tube housing

5 To remove the IIT housing (Figs 4, 5 and 6) proceed as follows:

WARNING

HIGH VOLTAGE. THE IMAGE INTENSIFIER TUBE (HT) CONTAINED IN THE GOGGLES MAY RETAIN A POTENTIAL OF UP TO 10 kV BETWEEN INPUT AND OUTPUT WINDOWS. THE TUBE ASSEMBLY MUST NOT BE REMOVED UNTIL THE GOGGLES HAVE BEEN SWITCHED OFF FOR AT LEAST 15 MINUTES. WHEN REMOVED THE TUBE ASSEMBLY SHOULD BE HANDLED WITH CARE AND SHOULD NOT BE DISCHARGED BY SHORTING THE TWO TUBE CONTACTS TOGETHER.

5.1 Remove the battery from the goggles.

5.2 Remove the four screws (Fig 4(1)), which secure the IIT housing to the collimator. this allows the IIT housing to be parted from the collimator, care must be taken not to pull sharply on the electrical wires between the two assemblies.

5.3 Disconnect the wires by pulling connectors (Fig 5(1 and 2)) apart.

5.4 Fully separate the two assemblies.

5.5 Lift off the shim (Fig 6(1)), and the '0' ring (2).

Image intensifier tube

6 To remove the IIT (Fig 6) proceed as follows:

6.1 Remove the IIT housing assembly as described at Para 5.

6.2 Remove the IIT from the housing by pushing gently on the objective end of the tube. Use tissue paper to avoid scratching the input window. DO NOT remove by pulling on supply wires.

1

Page 4

Screws (4 off)

1

2

2 Infra red light emitting diode

Fig 4 IIT housing (front view)

-0K-REST-RICTED-

PPE 8309-25

May 97

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421lec-RESTRICT-ED 5855-G-100-523

GPG/005

1 HT connector 3 Light emitting diode

2 Light emitting diode connector 4 Terminal screw

Fig 5 Collimator wiring

6.3 Remove the plastic seating ring (6) from the housing.

CAUTION

EQUIPMENT DAMAGE. Protect the input window from bright light, eg sunlight or bench

lamps and protect surface from scratching.

May 97

PPE 8309-24

1 Shim 4 ITT

2 '0' ring 5 IRLED sealing

3 Hole in shim 6 Seating ring

Fig 6 ITT housing (sectional view)

UK RESTRICTED Page 5

5855-G-100-523 4K-REST-R4CTED— ARMY EQUIPMENT SUPPORT PUBLICATION

Switch assembly

7 To remove the switch assembly proceed as follows:

7.1 Remove the IIT housing as detailed at Para 5.

7.2 Remove the switch knob by slackening the two screws (Fig 7(5)) and pulling the knob off.

7.3 Partially remove the switch flange and switch assembly by removing the three countersunk screws (2).

7.4 Unsolder the green wire from the tag board and the blue wire from the battery supply.

7.5 Unscrew the solder tag retaining screw.

7.6 Completely remove the switch assembly and the switch flange from the goggles.

7.7 Remove the switch assembly from the switch flange by unscrewing the switch retaining nut (3).

Page 6

PPE 8304-135J

1 Switch mounting plate 4 Switch 2 Screw (3 off) 5 Screw (2 off) 3 Switch retaining nut 6 Switch knob

Fig 7 Switch assembly

-14K-RESTRIG-TED- May 97

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ARMY EQUIPMENT 14K—RES-Thie-T-EB- 5855-G-100-523

SUPPORT PUBLICATION

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Collimator

8 To remove the collimator (Fig 5) proceed as follows:

8.1 Remove the IIT housing as described at Para 5.

8.2 Remove both of the eyepieces as described at Para 10.

Rubber eyecup

9 To remove the rubber eyecup pull the eyecup (Fig 8(3)) off the eyepiece (4).

Eyepiece

10 To remove an eyepiece proceed as follows, the procedure detailed is suitable for either eyepiece.

10.1 Remove the purging screw from the collimator housing, (Fig 2(1)). This is a red screw with

a bonded seal.

10.2 Unscrew the eyepiece bearing ring (Fig 8(1)), using the 'C' spanner - torque wrench assembly

(Table 1 Serial 4).

10.3 Withdraw the eyepiece from the collimator housing.

10.4 Remove the '0' ring (2).

May 97

1 Bearing ring 2 '0' ring

3 Eyecup 4 Eyepiece

Fig 8 Eyepiece

-14K-RES-TRICTED.

PPE 8304-135G

Page 7

5855-G-100-523 -LIX-RESTRIQT-C-0- ARMY EQUIPMENT SUPPORT PUBLICATION

Focus grip

11 To remove the focus grip (Fig 1(9)) proceed as follows:

11.1 Cut across the rubber with a sharp knife - take care not to scratch the glass surfaces.

11.2 Peel the rubber away from the metal housing.

11,3 Scrape off any adhesive remaining on the objective housing.

Battery cap spring

12 To remove the battery spring proceed as follows:

12.1 Remove the battery cap (6) from the goggles.

12.2 Pull the spring out of the cap.

Cantilever sub assembly

13 To remove the cantilever sub assembly. Remove the four screws (2), lift the cantilever (1) away from the goggles.

Faceframe sub assembly

14 To remove the faceframe sub assembly press out the five keyhole connectors which connect the faceframe assembly to the skull cap.

Facepad

15 To remove the facepad (Fig 9(1)) from the faceframe pull the. facepad material from around the periphery of the faceframe.

Page 8

1 Facepad

Fig 9 Headmount

tilec-RESTRIGTE9

PPE 8304-134E

May 97

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U14-RES-T-4416-TED 5855-G-100-523

Infra red light emitting diode sub assembly

16 To remove the Infra Red Light Emitting Diode (IRLED) sub assembly proceed as follows:


16.2 Remove the IIT assembly as detailed at Para 6.

16.3 Remove the potting compound (Fig 6(5)) from around the IRLED and withdraw the IRLED sub

assembly.

Light emitting diode

17 To remove the Light Emitting Diode (LED) proceed as follows:


17.2 Unsolder the LED leads from the LED tag board.

17.3 Carefully remove the LED from the collimator optics.

CLEANING AND EXAMINATION

Cleaning

CAUTION

CLEANING DAMAGE. Dirt or moisture entering the equipment will badly affect its

performance. Great care must be taken to avoid scratching the glass surfaces during cleaning.

No attempt should be made to wipe off mud or grit in a dry state. DO NOT use petroleum spirit

to clean glass surfaces.

18 Extreme care must be taken when cleaning the goggles. Glass surfaces must be cleaned in

accordance with instructions contained in EMER Inst A 274. Light losses caused by dirty optical surfaces

and internal reflections will seriously impair the goggles performance, and finger marks, grease or moisture

will encourage short circuiting of the IIT supply. If the fixed lenses within the collimator assembly require

cleaning, the following procedures must be carried out.

18.1 Remove the housing.

18.2 Remove both eyepieces.

18.3 Clean all traces of grease from both eyepiece recesses of the collimator using isopropyl

alcohol (Table 2 Serial 1) and tissue (Table 2 Serial 2). Care must be taken not to allow any grease

onto the lens surface.

18.4 Remove dust particles from within the collimator housing and from the glass surface using a

low pressure air blower.

18.5 Using a piece of pegwood (Table 2 Serial 4) with a small piece of cotton wool (Table 2

Serial 3) on the end, carefully clean any marks on the glass surface immediately adjacent to the

eyepiece recess. The cotton wool should be wetted with isopropyl alcohol.

May 97 -141(--RC-STRICT-ED Page 9

5855-G-100-523 -0K-REST-RIC-T-EB- ARMY EQUIPMENT SUPPORT PUBLICATION

18.6 If the small circular lens requires cleaning its surface should be carefully wiped with a tissue dampened with isopropyl alcohol.

18.7 if the inner surfaces of the doublet lens are contaminated by grease or water stains they cannot be cleaned without removing the lens assembly from the housing. Refitting of the lens assembly is a factory process, therefore if these surfaces are contaminated the collimator must be replaced.

19 The ND fitter can be washed in soap and plenty of water and then dried with a clean cloth or tissue; or it can be cleaned with Methylated Spirit Absolute (Table 2 Serial 5) and dried with a tissue.

Examination

Objective assembly

20 If any of the optical components are damaged or misplaced the objective assembly must be renewed.

21 The seal (Fig 3(2)) must be examined and if the sliding surface is damaged in any way the seal, must be renewed.

22 The stop pin (3) must be examined for damage. If the pin or the focus ring (4) is damaged the objective assembly must be renewed.


23 With the tube removed, the inside of the housing must be examined for any damage or dirt. If dirt is present it must be wiped out using a clean cloth and Methylated Spirit Absolute. Traces of jointing compound should be removed from the mating surfaces using acetone (Table 2 Serial 6).

24 If the housing is physically damaged in any way, it must be renewed, since any damage can cause misalignment of the optical axes of the assemblies fixed to the tube housing.

25 If the IR light source has failed, it can be replaced using diode insertion tool (Table 1 Serial 5) and sealing compound Silcoset 105 (Table 2 Serial 7) or similar.

26 Special care must be taken to avoid scratching or touching the fibre optic input and output windows of the IIT. solvents, such as methylated spirit or acetone, should not be used as they may remove the anti-reflection coating which is deposited on the IIT input and output windows. If necessary clean with 'Glenklene' and cotton wool to remove grease/stains.

27 Overall equipment luminous performance is to be tested using the Assessor, Night Sight as detailed in Category 513 of this AESP.

Collimator

28 If the housing of the collimator is damaged sufficiently to affect the optical performance the collimator assembly must be renewed

29 If the optical components have become misplaced the collimator assembly must be renewed because the optical components must be accurately located to ensure the perfcinnance of the goggles.

30 If the visible LED has failed it can be replaced using RTV 732 (Table 2 Serial 12) or equivalent.

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Eyepiece

Virt-14E6T-RIG-T-E6- 5855-G-100-523

31 If an eyepiece is to be re-used ensure that the optical surfaces are clean, that the bearing ring is

unworn and that the eyepiece housing is undamaged. The aperture in the collimator into which the

eyepiece fits must be clean and free of damage. If the optics of an eyepiece are misted internally, it must

be leak tested and purged (Para 56).

REPAIR AND REPLACEMENT

General

32 The repair policy for the goggles is for all defective sub assemblies to be renewed. Therefore repair

information is not required for sub assemblies and only replacement procedures are described.

Focus grip

33 Replace the focus grip as follows:

33.1 Remove the focus grip as detailed at Para 11.

33.2 Prise the lip of the focus grip (Fig 1(9)) over the front of the objective housing and adhere to

the objective housing using sealing compound Silcoset 153 (Table 2 Serial 8).

Objective lens assembly

34 Replace the objective lens assembly as follows:

34.1 Remove objective lens assembly as detailed at Para 4.

34.2 Inspect the assembly as detailed at Pares 20 to 22.

34.3 Ensure that the front face of the IIT is clean and free from dust. Remove dust with a soft

brush. If moisture or water has entered the IIT housing (Fig 1(7)), it will require dismantling for

cleaning. When the IIT and housing are clean, fit the new objective lens assembly. Ensure that the

outer glass surfaces are clean. Slightly smear the outer surface of the seal, (Fig 3(2)) with Grease

XG 271 (Table 2 Serial 9) and insert the objective into the IIT housing.

35 Replace the three screws (Fig 1(8)) sealing the threads of the screws with Varnish, Red, Anti Tracking

(Table 2 Serial 11).

36 Leak test and desiccate the unit using the purging screws on the collimator housing and tube housing.

Replace purging screws and bonded seals. The leak rate should be no greater than a pressure drop of

0.65 kPa (0.1 IbUin2) in 10 minutes at an initial pressure of 17.23 kPa (2.5 Ibf/1n2).


37 Remove the objective lens assembly, IIT housing and IIT as detailed at Pares 4 to 6.

38 Examine the IIT housing as detailed at Pares 23 and 24.

39 Ensure that ail internal surfaces and the flange of the new IIT housing are clean.

May 97 4M-IilESTRICT-612- Page 11

5855-G-100-523 UK RESTRICTED ARMY EQUIPMENT-SUPPORT PUBLICATION

40 Fit the seating ring into the new IIT housing.

41 Fit the IIT into the IIT housing.

42 Using the Depth Gauge Micrometer 0-3 in (Table 1 Serial 7) measure the distance from the output face of the IIT to the mounting flange of the tube housing, (dimension 1 in Fig 10). Refer to Table 3 and select the appropriate shim to be fitted.

43 Smear the face of the collimator flange with sealing compound, Universal Jointing compound (Table 2 Serial 10).

44 Fit a new '0' ring into the tube housing (Fig 6(2)). Smear Jointing compound onto the tube housing flange face.

45 Feed the four wires (two tube and two IR diode) through the hole in the shim and place the shim onto the tube housing flange.

46 Align the four holes in the shim with the bolt holes on the tube housing flange.

47 Connect the electrical leads from the tube housing onto the terminals in the collimator, ensuring that the leads are correctly connected, ie lead 1 to lead 1 and lead 2 to lead 2.

48 Remount the IIT housing onto the collimator using four M3 x 8.0mm screws. Seal the threads of the screws with Varnish, Red, Anti Tracking (Table 2 Serial 11).

X X X

PPE 8209-200

1 Dimension 1 2 IIT

Fig 10 Shim selection diagram

Page 12 _ -LIK-REISTRICTED- May 97

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-0K-FIEGT-RIGTES 5855-G-100-523

49 Replace the objective lens assembly as detailed at Paras 34 and 35.

50 Leak test and desiccate the unit using the purging screws in the collimator housing and tube housing.

The leak rate should not exceed a pressure drop of 0.65 kPa (0.1 lbf/in2) in 10 minutes at an initial

pressure of 17.23 kPa (2.5 Ibf/in2).

TABLE 3 SHIM SELECTION

Measured dimension 1 mm

Shim thickness required mm

Part No. Identification mark

10.36 to 10.45 1.69 027273 G

10.46 to 10.55 1.59 027272 F

10.56 to 10.65 1.49 027271 E

10.66 to 10.75 1.39 027270 D

10.76 to 10.85 1.29 027269 C

10.86 to 10.95 1.19 027268 B

10.96 to 11.05 1.09 027267 A

51 Rep ace the purging screws and bonded seals.

Image intensifier tube

52 To replace the IIT proceed as follows:

52.1 Proceed as detailed at Paras 4 to 6.

52.2 Remove the HT (Fig 11(6)) by sliding the insulating sleeves (4) along the wires (5) and

unsoldering the solder joint thus exposed. Remove the Insulating sleeves.

52.3 Cut the lengths of the wires of the replacement IIT or those of the connector (3), so as to

achieve a finished wire length from IIT to connector (point (1) to point (7)) of 75 ± 2mm (3 in ± 0.1 in).

52.4 Cut the lengths of the new insulating sleeves to suit, these should be of sufficient length to

completely cover the solder joint, ie approximately 12mm long. Slide these onto the wires (5).

52.5 Strip the insulation from the end of the cut wires for a length of approximately 5mm from each

cut end.

52.6 Solder the connector wires onto the IIT wires, taking care to ensure that the red wire of the

IIT goes to the red wire of the connector and the black wire of the IIT goes to the black wire of the

connector.

52.7 Slide the insulating sleeves over the solder joints.

52.8 Proceed as detailed at Paras 39 to 51.

May 97 -14K-RESTRICT-61)- Page 13

5855-G-100-523 -UK-RESTRICTED- ARMY EQUIPMENT SUPPORT PUBLICATION

GPG/006

1 Outer end of connector 5 IIT wires 2 Connector 6 Iii 3 Connector wiring 7 End of wires at IIT 4 Insulating sleeves

Fig 11 IIT and connector

Eyeguard

53 PUsh the new eyeguard over the retaining ridge on the eyepiece housing.

Eyepiece assembly

54 Remove the eyepiece as detailed at Para 10. Inspect as detailed at Para 31 and clean the glass as s detailed at Para 18. Ensure that the recess enclosing the sealing ring is clean.

55 If the sealing ring is damaged, fit a new sealing ring using a light application of grease XG 271 (Table 2 Serial 9).

56 If the eyepiece optics are misted internally, leak test the eyepiece and desiccate. The leak rate should not exceed a pressure loss of 0.18 kPa (0.026 lbf/in2) after 6 hours at an initial pressure of 17.23 kPa (2.5 lbf/in2)

57 Fit the eyepiece assembly into the recess and screw in the bearing ring until its shoulder butts up against the collimator housing. Tighten the bearing ring using the 'C' spanner torque wrench assembly, (Table 1 Serial 4), to 20 Nm ± 1.3 Nm (15 lbf in. ± 1 Ibf in.).

58 Refit the eyeguard as detailed at Pam 53.

59 Leak test and desiccate the unit using the purging screws in the collimator housing and tube housing. Replace the purging screws and bonded seals. The leak rate should be no greater than a pressure drop of 0.65 kPa (0.1 lbffin2) in 10 minutes, at an initial pressure of 17.23 kPa (2.5 lbffin2).

Collimator sub assembly

60 To remove the collimator proceed as detailed at Para 8.

61 Inspect the collimator sub assembly as detailed at Paras 28 and 29.

62 Replace both eyepieces as detailed at Paras 54 to 59.

Page 14 -UK-RESTRICTED- May 97


UK RESTRICTED 5855-G-100-523

Switch knob

63 Remove the knob as detailed at Para 7.

64 Place a new knob (Fig 7(6)) on the switch shaft (4) and secure by tightening the screw (5).

Switch

65 Remove the switch as detailed at Para 7 and remove all traces of jointing compound from the mating

surfaces using acetone (Table 2 Serial 6).

66 Replace the switch assembly onto the switch flange assuring correct orientation (Fig 12).

67 Reconnect the wires and replace the switch flange in the reverse order to that detailed at Paras 7.3

to 7.5.

68 Refit the IIT housing to the collimator assembly as detailed at Para 43 to 51.

1 Switch mounting plate 2 Switch shaft

Fig 12 Switch and knob orientation

69 Refit the switch knob as detailed at Para 64.

PPE 8209-201

3 Knob outline

70 Leak test and desiccate the unit using the purging screws on the collimator housing and tube housing.

The leak rate should not exceed a pressure drop of 0.65 kPa (0.1 lbf/in2) in 10 minutes, at an initial

pressure of 17.23 kPa (2.5 lbf/in2). Replace the purging screws and bonded seals.

Infra red light emitting diode sub assembly

71 To replace the IRLED sub assembly proceed as follows:

71.1 Remove the IRLED as detailed at Para 16.

May 97 UK-1464-TRIGT-ED- Page 15

5855-G-100-523 -UK RESTRICTED ARMY EQUIPMENT SUPPORT PUBLICATION

71.2 Using the Diode Insertion Tool (Table 1 Serial 5) put the new IRLED sub assembly into the IIT housing using sealing compound Silcoset 105 (Table 2 Serial 7) ensuring that the IRLED is flush to under-flush with its housing. Allow time for the sealing compound to set.

71.3 Refit the UT housing to the collimator as detailed at Paras 39 to 50.

Light emitting diode

72 To replace the LED proceed as follows:

72.1 Remove the LED as detailed at Para 17.

72.2 Adhere the new LED into the groove in the collimator optics using adhesive RN 732 (Table 2 Serial 12), ensuring the correct orientation (Fig 13).

72.3 Solder the LED leads onto the LED tag board.

72.4 Replace the IIT housing as detailed at Paras 39 to 50.

PPE 8209-199

1 Green wire 4 LED tag board 2 Black wire 5 LED 3 Earthing screw 6 Collimator lens

Page 16

Fig 13 Light emitting diode wiring

M4E-REST-MGT-ED- May 97


•

I

5855-G-100-523

PPE 8308-146

1 IIT connector S1 Switch

2 IRLED connector R1 Resistor

B1 Battery R2 Resistor

D1 LED I NT

D2 IRLED

Fig 14 Wiring diagram

Battery cap spring

73 Install the new spring in the cap by pressing the spring into the cap.

TESTS AFTER REASSEMBLY

74 Tests to be carried out after reassembly are those diagnostic tests relating to optical and operational

performance which are detailed in Category 513 of this AESP.

May 97 -ttk-REST-RICTED- Page 17

5855-G-100-523 -LIK-RESTRIGTEB- ARMY EQUIPMENT SUPPORT PUBLICATION

ADJUSTMENTS

75 The following adjustments can be made should the Goggle fail the convergence and supravergence diagnostic tests detailed in Category 513 of this AESP. The adjustment should first be made to the left eyepiece and if the specification still cannot be achieved then the same adjustments can be made to the right eyepiece.

75.1 Carefully remove the sealing compound from around the eyepiece lens.

75.2 Slacken the clamp ring securing the lens until the lens can be rotated.

75.3 Rotate the lens slowly until the convergence or supravergence is within specification.

75.4 Retighten the clamp ring and recheck to make sure the specification is still achieved.

75.5 Clean the lens thoroughly with Isopropyl Alcohol Table 2 Serial I and re seal the eyepiece lens by applying a bead of RTV 732 Table 2 Serial 12 around the edge of the lens.

75.6 Leak test and desiccate the eyepiece as detailed in pars 56.

PPE 8308-150

1. Clamp ring 2. Eyepiece lens 3. Left hand eyepiece

Fig 15 Eyepiece adjustment

Page 18 --1144-RESTR4C-T4D- Nov 2000 (Amdt 1)

5855-0-100-523

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Page 3

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•'

Documents

GOGGLES, IMAGE INTENSIFIED, GENERAL PURPOSE, CASED Ll A2 · 2019. 10. 17. · the image intensifier tube (ht) contained in the goggles may retain a potential of up to 10 kv between