BEARING-ROLLER 4826738 - Caterpillar

Illustration 1 g02699096
Hydraulic system schematic
(1) Priority valve
(2) Lockup clutch solenoid valve (if equipped)
(3) Impeller clutch solenoid valve
(4) Transmission hydraulic controls
(5) Oil filter
(7) Torque converter
(8) Lockup clutch (if equipped)
(9) Impeller clutch
(10) Oil pump
(11) Torque converter outlet relief valve
(12) Flow control orifice
(13) Magnetic screen
(14) Oil cooler
(15) Reservoir in output transfer gear case
(16) Outlet line from oil cooler to planetary lubrication
(A) Oil pump output pressure tap P1
(B) Pressure tap for oil pump
(C) Pressure tap for lockup clutch (if equipped)
(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 Note: Reduced rimpull is a feature of the 992K Wheel Loader. The 854K Wheel Tractor is not equipped with this feature.
Illustration 2 g00107979
992G Wheel Loader Torque Converter Cover
(C) Pressure tap for lockup clutch (if equipped)
(F) 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 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, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products.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 to the default settings for reduced rimpull before a test of the three reduced rimpull settings can be performed.Reference: Refer to the Service Manual module for Systems Operation, Testing and