Forward Clutch Preinspection

Forward Clutch Preinspection

Clutch operation
1. Set the forward clutch onto the oil pump.

Caution: Applying compressed air to the assembled clutch pack for longer than 3 s at a time will damage the seal. Do not apply compressed air for more than the aforementioned time when testing the system.





2. Inspect the clutch operation by applying compressed air through the fluid passages shown.
Air pressure 392 kPa (4.0 kgf/cm2, 57 psi) max.
3. If not as specified, replace parts as necessary.

Clutch clearance





1. Measure the forward clutch clearance.
(1) Install the forward clutch in the oil pump, and set the dial gauge.
(2) Secure the forward clutch by lightly pressing down with a press, etc.





(3) Apply compressed air to the part indicated in the figure and let the forward 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 forward 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 forward clutch piston is not operating.
(6) Calculate the forward clutch clearance according to the following formula: Step (4) value - Step (5) value = Forward 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.
Forward clutch clearance 1.50 - 1.80 mm (0.059 - 0.071 inch)
2. If not as specified, replace parts as necessary.