Clutch Air Pressure Tests
Inoperative clutches can be located using a series of tests by substituting air pressure for fluid pressure using (special tool #10383, Plate, Clutch Pressure Test).
The clutches may be tested by applying air pressure to their respective passages. The valve body must be removed. To make air pressure tests, proceed as follows:
The compressed air supply must be free of all dirt and moisture. Use a pressure of 5-8 bar (73-116 psi).
Remove the valve body. Refer to VALVE BODY, REMOVAL AND INSTALLATION . Install (special tool #10383, Plate, Clutch Pressure Test) and tighten bolts to 6 N.m (50 in. lbs.). When testing is finished install valve body. Refer to VALVE BODY, REMOVAL AND INSTALLATION . Fill the transmission. Refer to TRANSMISSION FILL AFTER SERVICE .
If any clutch does not appear to be functioning with the air, add some 8HP transmission fluid and try the test again. Some circuits will not operate without fluid.