3-4 Clutch Clearance

3-4 clutch clearance
1. Measure the 3-4 clutch clearance.
1) Install the 3-4 clutch in the end cover and set the dial gauge.





2) Secure the 3-4 clutch by lightly pressing down with a press, etc.





3) Apply compressed air to the part indicated in the figure and let the 3-4 clutch piston stroke three times.

Air pressure:
392-441 kPa (4.0-4.5 kgf-cm2, 57 -63 psi)

4) Apply compressed air and operate the 3-4 clutch piston. Read the value when the indicator of the dial gauge stops.
5) Release the compressed air and read the dial gauge when the 3-4 clutch piston is not operating.
6) Calculate the 3-4 clutch clearance according to the following formula:
Step (4) value - Step (5) value = 3-4 clutch clearance.





7) Measure the clearances at four locations (90° apart) by following the steps from (3) to (6). Verify that the average value is within the specification below.

3-4 clutch clearance
Drive plate part number: FN11 19 370
1.00-1.30 mm (0.039-0.051 in)
Drive plate part number: FNE1 19 370
1.10-1.40 mm (0.043-0.055 in)

2. If not as specified, replace parts as necessary.