HOUSING 2264345 - Caterpillar

Illustration 1 g00378312
Hydraulic System Schematic (1) Priority valve. (2) Torque converter clutch valve group. (3) Oil filter. (4) Lockup clutch solenoid valve. (5) Impeller clutch solenoid valve. (6) Oil pump. (7) Lockup clutch. (8) Magnetic screen. (9) Transmission hydraulic control. (10) Oil cooler. (11) Torque converter. (12) Impeller clutch. (13) Reservoir in output transfer gear case. (14) Outlet line from oil cooler to planetary lubrication. (15) Torque converter outlet relief valve. (A) Pressure tap for lockup clutch. (B) Oil pump output pressure tap P1. (C) Torque converter inlet pressure tap P3. (D) Pressure tap for impeller clutch. (F) Lubrication pressure tap. (G) Torque converter outlet pressure tap.Note: Reduced rimpull is a feature of the 990 Series II Wheel Loader. The 990 Wheel Loader and the 844 Wheel Tractor are not equipped with this feature.
Illustration 2 g00393003
Torque Converter (A) Pressure tap for lockup clutch. (D) Pressure tap for impeller clutch.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. 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 in Caterpillar machines.Dispose of all fluids according to local regulations and mandates.
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.
Park the machine on a smooth level surface.
Shift the STIC transmission direction control to the NEUTRAL position.
Lower the bucket and/or the attachment to the ground. Lower the blade and/or the attachment 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.Note: All tests and all adjustments must be made while the transmission oil is at normal operating temperature.
Table 1
Required Tools    
Part Number     Description     Quantity    
1U-5481     Pressure Gauge Group     1    
1U-5482     Pressure Adapter Group     1    
The drive shaft rotates between the torque converter and the transmission whenever the engine is running. Contact with the rotating shaft can result in personal injury or death.The rotating shaft is located under the implement and steering pumps. Do not allow personnel into the pump bay area behind the cab when the engine is running.
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.To prevent injury or death, make sure that the area around the machine is clear of personnel and obstructions before moving the machine to perform the test that follows.
Note: The default settings for reduced rimpull can be changed in the field. The power train control must be set