BLOCK 2777576 - Caterpillar

Table 4
Shims For The Pressure Control Valve
Pressure Change Per Shim
Station(1) A B C D(2) E F G
Engaged
Clutch 2 1 3 - 4 5 6
Thickness of Shim Pressure Change Pressure Change Pressure Change Pressure Change Pressure Change Pressure Change Pressure Change
5J-2721 Shim
0.13 mm (0.005 inch) 20 kPa (2.9 psi) 17 kPa (2.5 psi) 20 kPa (2.9 psi) 12 kPa (1.7 psi) 17 kPa (2.5 psi) 14 kPa (2.0 psi) 19.5 kPa (2.83 psi)
6J-3993 Shim
0.25 mm (0.010 inch) 41 kPa (5.9 psi) 33 kPa (4.8 psi) 41 kPa (5.9 psi) 25 kPa (3.6 psi) 35 kPa (5.1 psi) 28 kPa (4.1 psi) 38.5 kPa (5.58 psi)
4M-1751 Spacer
0.41 mm (0.016 inch) 65 kPa (9.4 psi) 53 kPa (7.7 psi) 65 kPa (9.4 psi) 39 kPa (5.7 psi) 56 kPa (8.1 psi) 45 kPa (6.5 psi) 62 kPa (9.0 psi)
5J-1036 Shim
0.80 mm (0.031 inch) 125 kPa (18.2 psi) 103 kPa (14.9 psi) 125 kPa (18.2 psi) 76 kPa (11.0 psi) 109 kPa (15.8 psi) 87 kPa (12.6 psi) 120 kPa (17.4 psi)
(1) Station "H" is not used.
(2) Station "D" does not control a clutch. Station "D" controls the dual stage relief valve for the system pressure.Use Illustration 3, Table 2, Table 3, and Table 4 for the following problems.Problem: The primary pressure is correct, but the maximum pressure is not correct.
Probable Cause
Wrong inner spring (7) and/or outer spring (8) is installed in the load piston.
Inner spring (7) and/or outer spring (8) in the load piston is weak or broken.
Load piston orifice (4) is plugged.Problem: The pressure at one clutch is 0 kPa (0 psi).
Probable Cause
There is a leak in the piston seal.
The supply port is not receiving oil from the selector spool.
Selector piston plug (2) is not installed.
The selector piston (10) is stuck.
The modulation reduction valve (3) is stuck.Problem: The primary pressures at all the clutches are 0 kPa (0 psi).
Probable Cause
The probable cause is the pilot pressure. Perform the test in the Testing and Adjusting, "Transmission Hydraulic Control Pilot Pressure - Test and Adjust".
The operation of the neutralizer valve in the selector and pressure control valve is not correct. Disassemble the selector and pressure control valve. Check for any foreign material or for any parts that are damaged or worn. Be certain that the orifice and/or the ball check valve of the neutralizer valve are free of any debris.
There is a restriction in the screen in the rotary selector spool.Problem: The primary pressures at all the clutches are too low.
Probable Cause
There is a problem with the transmission gear pump. Perform the test in the Testing and Adjusting, "Gear Pump (Transmission Charging) Pressure - Test and Adjust".
There is a restriction in the screen in the rotary selector spool.Problem: The primary pressure at one clutch is too low.
Probable Cause
Load piston (9) and/or selector piston (10) is stuck.
Inner spring (7) is weak or broken, and/or outer spring