FAN GP-BLOWER 2Y9055 - Caterpillar

Adjustment for the Transmission Clutch Pressure
The transmission clutches 1 and 3 should have the same pressures. If the pressure readings are not within the values in table 4, calibration for the transmission clutch engagement must be performed. Refer to Testing and Adjusting, "Fill Time for the Transmission Clutch - Calibrate" for the proper calibration procedure.The transmission clutches 2, 4, 5, and 6 should have the same clutch pressure. If the pressure readings for all of the transmission clutches are not within the values that are in Table 4, the main transmission relief valve may need to be adjusted. Refer to "Adjustment for the Transmission Oil Pump Pressure" for the proper adjustment procedure. If one of the transmission clutch pressures are not within the specification, check that the modulating valve for that clutch is operating correctly.Remote Pressure Taps
Illustration 3 g00925414
Remote Pressure Tap Location (9) Transmission lubrication pressure tap (10) Pressure tap for torque converter inlet pressure tap (11) Torque converter outlet pressureSome machines are equipped with remote pressure taps for the power train system. The remote pressure taps are located on the left side of the machine inside the ladder.Test for the Lubrication Oil Pressure
Table 5
Transmission Pressure    
Pressure     Specification (High Idle)     Actual Pressure    
Lubrication Oil Pressure    
265 50 kPa (38 7 psi)        
Illustration 4 g00283697
Inlet for Transmission Lubrication OilThe inlet for transmission lubrication oil is located above the parking brake beneath the cab.
Illustration 5 g00925857
Inlet for Transmission Lubrication Oil (12) 6V-7946 Plate Assembly . (13) 6V-4249 Bolt .
Install the 6V-7946 Plate Assembly with the 6V-4249 Bolts .
Attach the correct hose to 6V-7946 Plate Assembly (12) . Attach the opposite end of the hose to the 1U-5481 Pressure Gauge Group .
Start the engine and operate the engine at high idle. With the oil at normal operating temperature, the pressure reading must be within the values in Table 5.Test for the Transmission Oil Pump Pressure
Attach the correct hose to pressure tap (8) for the transmission oil pump pressure. Attach the opposite end of the hose to the 1U-5481 Pressure Gauge Group .
Start the engine and operate the engine at high idle. With the oil at normal operating temperature, the pressure reading must be within the values in Table 6.Adjustment for the Transmission Oil Pump Pressure
The transmission relief valve (16) is located below the modulating valves.
Illustration 6 g00925862
If the transmission oil pump pressure at pressure tap (8) is not within the values in Table 6, adjust the spring of the transmission relief valve (16) . Use the following procedure.
Remove cover (17) .
Turn adjustment screw (18) 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 (17) .
Check the transmission oil pump pressure again at pressure tap (8) . Make sure that the transmission oil pump pressure is within the value in Table 6.
Table 6
Transmission Pressure    
Pressure