DISC-CLUTCH 8W9291 - Caterpillar

Illustration 1 g00738516
Hydraulic Schematic for the Torque Converter (1) Priority Valve (2) Modulating Valve for the Lockup Clutch (3) Modulating Valve for the Impeller Clutch (4) Transmission Hydraulic Controls (5) Power Train Oil Filter for the High Pressure Circuit (6) Power Train Oil Filter for the Low Pressure Circuit (7) Torque Converter (8) Lockup Clutch (9) Impeller Clutch (10) Power Train Oil Pump (11) Torque Converter Outlet Relief Valve (12) Torque Converter Bypass Orifice (13) Magnetic Screen (14) Oil Cooler (15) Reservoir in Output Transfer Gear Case (16) Outlet Line from Oil Cooler to Planetary Lubrication (A) Pressure Tap for the Main Relief Valve (B) Pressure Tap for the Priority Valve (C) Pressure Tap for Lockup Clutch (D) Torque Converter Inlet Pressure Tap P3 (E) Pressure Tap for Oil Pump (F) Pressure Tap for Impeller Clutch (G) Lubrication Pressure Tap (H) Torque Converter Outlet Pressure Tap
Illustration 2 g00446991
(D) Torque Converter Inlet Pressure Tap P3.
Personal injury or death can result from sudden machine movement.Sudden movement of the machine can cause injury to persons on or near the machine.Prevent possible injury by performing the procedure that follows before working on the machine.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Move the machine to a smooth, horizontal location that is away from operating machines and away from personnel.Note: Permit only one operator on the machine. Keep all other personnel away from the machine or in the operator's sight.
Move the STIC transmission direction control switch to the NEUTRAL position.
Lower the work tool to the ground.
Engage the parking brake.
Place blocks in front of the wheels and behind the wheels.
Install the steering frame lock.
Allow only authorized personnel on the machine. Keep unauthorized personnel off the machine and in clear sight of the operator.
Do not connect or disconnect hose fittings to or from the quick disconnect nipples when there is pressure in the system. This will prevent damage to the seals that are in the fitting.
Table 1
Required Tools    
Part Number     Description     Quantity    
1U-5481     Pressure Gauge Group     1    
1U-5482     Pressure Adapter Group     1    
Install a hose and a 1400 kPa (200 psi) pressure gauge on pressure tap (D) .
Start the engine and run the engine at high idle.
The pressure on the gauge must not exceed 930 kPa (135 psi) with cold oil.Note: There is no adjustment for this pressure. This pressure depends on P1 oil pressure. The ratio valve in the selector and pressure control valve controls the P1 pressure.