Kress SC-330T Slab Carrier

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Kress SC-330T Slab Carrier Overview1. Machine Envelope

• Proposed Carrier Layout

• Existing Carrier Layout

• Carrier Overlay

2. Structural Improvements• Kress Design Process/FEA

• Mainframe Structure

• Tong Structures

• Gooseneck

3. Product Updates• CAT 631G Engine/Powertrain

• Operator Cab

• Electrical System

• Hydraulic System

• Braking System

• Cab Visibility Tilt Function

• Emergency Lower

4. Maintenance/Accessibility

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Proposed Carrier Layout

Overall Carrier Size•Length: 54’-1.7” (16502mm)

•Width: 17’-10.2” (5441mm)

•Height: 17’-10.5” (5448mm) [20’-7.2” (6278mm) at Max Lift]

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Existing Carrier Layout

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Carrier Overlay

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Siemens NX6• Advanced solid modeling package that utilizes

full 3D design and assembly

NX Nastran• FEA solver package

Altair HyperWorks1. Analysis software for FEA results2. Provides mode and displacement analysis for

any given point on a part or structure

Kress Design/Analysis Process

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Kress carriers are fully designed and assembled in the NX6 3D Modeling Software for complete accuracy. All assemblies are rigorously checked and inspected to insure proper fit, function,and clearance prior to being released for production.

Design Process

All Kress rear frames and structures undergo a rigorous FEA analysis prior to final design release. All structure analysis are subject to 3G type loading to simulate impact and fatigue loading over the life of the carrier.

High stress concentrations in members and joints are subject to a design validation.

Areas that do pass the required design criteria are subject to aredesign and will undergo further FEA analysis. Once the structure has been validated, all components will be released for production.

Design Analysis

Kress Design/Analysis Process

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Mainframe Structure

Additional plating and updated design to the rear frame reduces stress concentrations and prevents failures due to fatigue.

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Tong Structures

Redesigned ear profile provides additional strength at the cylinder mount area

Internal support bars reinforce the tong structure at the pivot area

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Gooseneck Structure

Gussets provide additional strength where the casting is welded to the side plates

Thicker bottom wrapper plate and additional interior plating reduce stress and prevent excessive flex

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Kress Dual Control Operator Cab

Features and Enhancements•Modern look and feel

•Greatly improved visibility for the operator

•Ergonomically designed hand and foot controls

•Well positioned and highly visible instrument clusters

•Electro-hydraulic controls

•Idle sound pressure < 85 dba at the operator

•Training seat (Standard)

•Fully adjustable operator seat with air suspension, 180ºseat rotation, and seat mounted control pod

•Integrated HVAC system with well balanced airflow front and rear

•Cab tilts rearward for ease of access to underneath components

•Shock mounted for noise and vibration reduction

•Front steering column features telescope and tilt adjustments

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Kress Dual Control Operator Cab

Operator and Training Seat

Operator seat• 180 degree swivel• Mounted below floor level• Includes two switches to detect seat

position

Seat mounted controls• SMC pod on right side• Armrest only on left side

Training seat mounted in theleft rear corner of the cab

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Kress Dual Control Operator Cab

Front and Rear Instrument Clusters

Front Rear

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Kress Dual Control Operator Cab

Front and Rear Instrument Cluster ID

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20-22

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25-32

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Front

Rear

1 2

3

4

5

67-10

11-13

15

14

16 17

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1. Speed / Tach Module2. Quad Gauge Module3. EMS Module4. Fuel Gauge5. Air Pressure Gauge6. Hydraulic Oil Temp Gauge7. Headlight Switch8. Strobe Light Switch9. Floodlight Switch10. Fog Light Switch11. EMS Mode Switch12. Coolant Pump Switch13. Optional Switch Location14. Indicator Lights :

high beam, left/right turn, gear hold, diff lock, retarder, [seat] direction

15. Indicator Lights :carry height, low brake oil press

16. Ignition Switch17. Cigarette Lighter18. 2-Way Radio (space claim)19. HVAC Control (RH sill)

20. Single Axis Joystick21. Single Axis Joystick22. Single Axis Joystick23. IQAN Display24. Rear Wiper / Washer

Control (not shown)25.-32. Rocker Switches33. Camera Monitor (space

claim)

34. Transmission Shifter, with Gear Hold Button

35. Park Brake Switch

PURPLE = Optional Items

Front Rear

Seat Mounted (not shown)

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Kress Dual Control Operator Cab

Front Interior View

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Kress Dual Control Operator Cab

Rear Interior View

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CAT 631G EngineThe CAT C18 Electronically Controlled Unit Injection (EUI) diesel engine powers the tractor. With dual horsepower capability, it provides high power and torque rise for excellent lugging in tough loading conditions. The C18 is designed for long hours of continuous operation with high displacement and low RPM ratings.

The ACERT technology reduces emissions during the combustion process by using advanced technology in air and fuel systems, in conjunction with integrated electronics. Caterpillar meets emission regulations at the combustion source rather than recycling exhaust gases.

336 kw450 hpNet Power, 1900 rpm – Gears 1-2

145 mm5.71 inBore

183 mm7.20 inStroke

18.1 liters1.106 cu. in.Displacement

358 kw480 hpGross Power, 1900 rpm – Gears 1-2

387 kw519 hpGross Power, 1900 rpm – Gears 3-8

362 kw485 hpNet Power, 1900 rpm – Gears 3-8

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CAT 631G EngineFeatures of the CAT C18 ACERT Engine:

•ADEMThe ADEM controls engine speed by adjusting the fuel duration, resulting in quicker starts in hot and cold weather, better fuel economy, better operator response, and automatic compensation for altitude and filter plugging.

•Electronic Control Module (ECM)The ECM utilizes advanced engine management software to monitor, control and protect the engine. The ECM maintains an active electronic fault log that aids in troubleshooting. Input from sensors allows the ECM to monitor and control injection, timing, injection pressure, engine cooling fan speed, ether starting aid and hydraulic pumps to adjust to any operating conditions.

•Air-to-Air Aftercooling (ATAAC)Reduces air inlet temperature for enhanced combustion efficiency, reduced emissions levels, higher altitude capability, and more power.

•Diagnostic CapabilityElectronic Technician (Cat ET) is used to display real-time pressures, temperatures, fuel settings and diagnostic messages as well as historical information such as engine over-speeds, overheating, low oil pressure and air filter restriction events.

•Fuel EconomyElectronic controls yield a fuel savings by optimizing the timing setting for varying conditions. The ECM matches timing to the load on the engine, engine speed and temperature.

•MaintenanceEUI engines have virtually no mechanically controlled parts to wear or adjust. These have been replaced by electronic controls, reducing maintenance costs and increasing machine availability.

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CAT 631G Powertrain

Electronically controlled Caterpillar planetary power shift transmission with eight forward and one reverse speed. Gears 1 and 2 operate in converter drive for increased torque capability. Gears 3-8 operate in direct-drive for drivetrain efficiency during the haul. Reverse gear operates in converterdrive.

Gear selection choices are 1st, 2nd and Drive.

Transmission

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CAT 631G Powertrain

TransmissionFeatures of the CAT Transmission:

•Electronic ControlProvides smooth, consistent shifts through the synchronization of engine and transmission speeds.

•Directional Shift ManagementReduces driveline torque and transmission clutch energy when attempting directional shifts or shifts from neutral during high engine rpm. This helps prevent excessive transmission wear and increases drive train life.

•Control Throttle Shifting (CTS)Automatically synchronizes engine speed to transmission speed when shifting gears. CTS reduces powertrain stress and increases component life, as well as providing a smoother ride for the operator.

•Programmable Top Gear SelectionAllows the operator to manually set the top gear (3rd – 8th) available to match conditions or the hauling speed of the fleet to specific job-site needs.

•Transmission HoldAllows the operator to maintain converter drive, or hold the current gear for enhanced control.

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CAT 631G Powertrain

Outboard-mounted, planetary design final drives reduce torque loads on the other powertrain components, and provide larger contact area between gears than countershaft transmissions for greater load carrying capacity.

Large capacity, double-row roller bearings and Caterpillar Duo-Cone seals deliver exceptional reliability in the toughest applications.

Planetary/Final Drive

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Electronic Control/Monitoring

Parker IQAN Control SystemThe IQAN control system consists of an operator interface 6.5 inch color display monitor with user interface buttons and control modules which monitor and control the carrier function.

•Hardware designed for mobile equipment – DC powered

•Controls all Kress hydraulic rear carrier control functions

•Diagnostic capability of all inputs and outputs

•Pop-up alarms and warnings for easier diagnostics

•View logged alarms with time/date stamp

•Monitors critical machine functions

•Features set-up and configuration screens with password protection

•Remote diagnostic and troubleshooting capabilities via cellular modem

•Ability to update/flash machine programs via laptop with IQAN software

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Electronic Control/Monitoring

If a fault occurs, a window will pop-up on the display screen with a description of the fault and a location of the wire. These faults will be logged in the System Log.

Alarm Screen

Drag Link Extend Pressure

Brake Pressure Drag Link Retract Pressure

Front Clamp PressureLift Pressure

Rear Clamp Pressure

Main Display Screen

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Hydraulic SystemThe Kress SC-330T rear carrier Lift and Clamp functions are controlled by the new Caterpillar/Kress Electro-Hydraulic Control Valve.

The Lift and Clamp hydraulic circuits are regulated proportionally by the electronic joystick signals from within the operator cab.

Auxiliary hydraulic functions of the carrier (Drag Link, Cushion Hitch, Cab Tilt, Quick Function) are either mechanically or electronically actuated rather than air piloted.

Lift/Clamp Control

(Joystick)

Auxiliary Functions

(Switches)

Drag Link Auto-Clamp

Electro-Hydraulic Control Valve

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Hydraulic System

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Hydraulic Braking SystemThe Caterpillar pneumatic actuated braking system is replaced with a Kress custom hydraulic actuated braking system. The internal braking components on the Caterpillar tractor (drum, shoe, slack adjuster, linkage) remain the same.

The Kress hydraulic braking system replaces the air actuators with hydraulic actuators and adds a Brake Control Manifold to control the park and service brake functions.

The hydraulic braking system is fully integrated into the IQAN control system and the Caterpillar transmission ECM to monitor functionality and ease troubleshooting.

The addition of the hydraulic braking system (along with the full electro-hydraulic function control) eliminates the need for air on the carrier. This eliminates the cold weather operating issue of air lines becoming clogged with frozen moisture condensation.

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Hydraulic Braking System

Hydraulic Brake ActuatorBrake Control Manifold

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Hydraulic Braking System

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Cab Visibility Tilt FunctionA tilt function is incorporated into the cab mount to provide additional visibility for the operator when picking up or setting down slabs.

The mechanism utilizes a hydraulic cylinder to tilt the cab 10° rearward. The hydraulic circuit is dampened in order to maintain operator comfort throughout the entire function.

The system is actuated from within the operator cab by a rocker switch located on the rear dash. The tilt function will remain ON until the operator depresses the switch to the OFF position. When the tilt function is in the OFF position, hydraulic pressure will hold the cab in the down position so not to cause excessive vibration to the operator.

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Emergency LowerIn the event the carrier loses all hydraulic and electrical controls while operating with a suspended load, a manual “Emergency Lower” system has been incorporated into the hydraulic circuit to safely lower the load to the ground.

The manual controls (needle valves) are located just outside the operator cab door on the rear LH handrail of the cab platform.

To lower the suspended load, the operator will slowly open the needle valve labeled “Lower” until the load is on the ground. The operator will then open the needle valve labeled “Unclamp” to relieve the hydraulic pressure in the clamp cylinders.

Once the system has been fully activated, the carrier can be towed away from the load.

Lower

Unclamp

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Maintenance/Accessibility

Operator Cab AccessThe operator cab is accessed from the front LH side of the machine.

Once on the operator cab platform, access is available to all sides of the operator cab.

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Maintenance/Accessibility

Operator Cab MaintenanceThe operator cab is mounted to a pivoting frame to provide access to the components underneath.

The tilt mechanism is actuated by an electrically powered hydraulic pump. The controls are located just outside the operator cab door on the rear LH handrail of the cab platform.

Once the cab is fully tilted, a safety link is pinned between the pivoting frame and the cab access platform to prevent the cab from lowering.

Cab Tilt Pump

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Maintenance/Accessibility

Rear Carrier MaintenanceThe rear carrier features side ladders for ease of access to rear frame components.

These access points eliminate the need for portable ladders and/or powered hoists in certain areas of the rear frame.

Tong table platforms provide additional access to the tong cylinders and cables.