HOUSING 1890107 - Caterpillar

If the transmission oil pump pressure at pressure tap (8) is not within the values in Table 7, adjust the spring of the transmission relief valve (10) . Use the following procedure.
Remove cover (11) .
Turn adjustment screw (12) in the proper direction.Turning the adjustment screw clockwise increases pump pressure. Turning the adjustment screw counterclockwise decreases pump pressure. One full turn of the adjustment screw changes pump pressure 160 kPa (23 psi).
Install cover (11) .
Check the transmission oil pump pressure again. Make sure that the transmission oil pump pressure is within the value in Table 7.
Table 6
Transmission Pressure    
Pressure Tap     Specification     Actual Pressure    
Transmission oil pump
HIGH IDLE    
2400 50 kPa (350 10 psi)        Test for the Torque Converter Inlet Pressure
Illustration 6 g01115684
Pressure tap (13) is located on the transmission relief valve. The transmission relief valve is located below the modulating valves.
Install the correct hose assembly from the 1U-5482 Pressure Adapter Group on pressure tap (13) . Attach the opposite end of the hose assembly to the 0 to 2000 kPa (0 to 290 psi) pressure gauge in the 1U-5481 Pressure Gauge Group .
Start the engine and operate the engine at high idle. Observe the pressure gauge. With the oil at normal operating temperature, the torque converter inlet pressure must be below the values in Table 8.
Table 7
Transmission Pressure    
Pressure Tap     Specification     Actual Pressure    
Torque converter inlet
HIGH IDLE    
580 70 kPa (85 10 psi)        Test for the Torque Converter Outlet Pressure
Illustration 7 g00910058
Illustration 8 g00913318
Pressure tap (14) is located on the top of the transmission.
Install the correct hose assembly from the 1U-5482 Pressure Adapter Group on pressure tap (14) . Attach the opposite end of the hose assembly to the 0 to 2000 kPa (0 to 290 psi) pressure gauge in the 1U-5481 Pressure Gauge Group .
Start the engine and operate the engine at high idle. Observe the pressure gauge. With the oil at normal operating temperature, the torque converter outlet pressure must be within the values in Table 9.
Table 8
Transmission Pressure    
Pressure Tap     Specification     Actual Pressure    
Torque converter outlet
HIGH IDLE    
390 165 kPa (56 24 psi)        Transmission Pressures
Table 9
Transmission Pressure    
Pressure Tap     Specification     Actual Pressure    
Modulating valve for clutch 1 (forward low)