PULLEY 7N8880 - Caterpillar

Test Preparation
Park the machine on a smooth level surface.
Shift the STIC transmission direction control switch 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.
Remove the front axle shafts and rear axle shafts except for stall tests.
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.Test Procedures
Use the following procedure in order to check the pressure of the direction clutch oil, the speed clutch oil, and the oil pump output.
Illustration 3 g03670138
Transmission
(A) Oil pump output pressure tap
(E) Speed clutch pressure tap P1
(F) Direction clutch pressure tap P2
Illustration 4 g00396221
Transmission Control Valve
(E) Speed clutch pressure tap P1
(F) Direction clutch pressure tap P2
(J) Plug for the load piston LP
Install the correct hose assembly from 1U-5482 Pressure Adapter Group on the following pressure taps: (A), (E) and (F). Attach the opposite end of the hose assembly to the 0 to 3400 kPa (0 to 580 psi) pressure gauge in the 1U-5481 Pressure Gauge Group.
Engage the parking brake. Shift the transmission direction control switch to the NEUTRAL position. Shift the transmission upshift switch to the FIRST SPEED position. Start the engine and operate the engine at low idle.
Depress the right service brake pedal and hold the right service brake pedal. Release the parking brake. Watch the pressure gauges. Shift the transmission direction control switch from the NEUTRAL position to the FORWARD position. Increase the engine speed to high idle. Make sure that the transmission oil is at normal operating temperature. The needle on the pressure gauge for the Number 2 clutch should rise. The needle on the pressure gauge for the Number 5 clutch should rise. With the transmission in the FORWARD position, shift through the remaining forward speeds and return to the FIRST SPEED position. Use the transmission upshift switch and the transmission downshift switch in order to change speeds. This checks the pressure of all the speed clutches.
Perform Step 3 for all reverse speeds. The same pressure levels should be noted in all reverse speeds. Lubrication Oil Pressure Test
Use the following procedure to check the pressure of the transmission lubrication oil.
Illustration 5 g00396223
Transmission Cover
(H) Transmission lubrication pressure tap
Install the correct hose assembly from 1U-5482 Pressure Adapter Group on pressure tap (H). Attach the opposite end of the hose assembly to the 0 to 400 kPa (0 to 58 psi) pressure gauge in the 1U-5481 Pressure Gauge Group.
Start the engine and operate the engine at high idle. The oil must be at normal operating temperature. Observe the pressure gauge. The pressure reading for the lubrication oil must match the values that are found in the table above. Adjustment Procedure for the Transmission Pressures
Illustration 6 g01478107
Transmission selector and pressure control valve
(30) Load piston. (31) Spacers.
Table 5
Pressure