SPECIAL AR 2894410 - Caterpillar

Personal injury or death can result from sudden machine movement.Sudden movement of the machine or release of oil pressure can cause injury to persons on or near the machine.To help prevent possible injury or death, refer to the information in Testing and Adjusting, "Machine Preparation for Troubleshooting".
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 Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Note: Make sure that the filters and the screens are clean before you test any pressures. The transmission oil must be cold when you perform this test.Procedure
Note: This procedure will also alter the setting of the modulation relief valve.
Table 1
Spacer Chart for the Selector and Pressure Control Valve    
Part No. for the Spacers     Thickness of the Spacers     Change in Pressure as a Result of One Spacer    
5M-9624 Spacer    
0.25 mm (0.01 inch)    
5 kPa (0.73 psi)    
5M-9623 Spacer    
0.90 mm (0.035 inch)    
18 kPa (2.61 psi)    
5M-9622 Spacer    
1.60 mm (0.063 inch)    
32 kPa (4.64 psi)    
Park the machine on a hard level surface. Stop the engine, engage the parking brake and block the wheels.
Illustration 1 g01058388
(1) Cover for the selector and pressure control valve
Remove cover (1) .
Illustration 2 g01058704
Section view of the selector and pressure control valve (2) Spacers (3) Load piston (4) Cover
Personal injury can result from parts and/or covers under spring pressure.Spring force will be released when covers are removed.Be prepared to hold spring loaded covers as the bolts are loosened.
Note: Care must be taken when removing cover (4). Be prepared to hold the spring loaded cover as bolts are loosened.
Remove cover (4) and load piston (3) .Note: Before an adjustment is preformed, be certain that the valve springs are not weak or broken.
To increase the pressure add to spacers (2). Refer to Table 1.
To decrease the pressure subtract from spacers (2). Refer to Table 1.
Install load piston (3) and cover (4) .
Install cover (1) .