Forward Clutch: Inspection

INSPECT PISTON STROKE OF FORWARD CLUTCH

Using a dial indicator (long type pick or SST), measure the forward clutch piston stroke while applying and releasing compressed air (392 to 785 kPa, 4 to 8 kgf*cm² , 57 to 114 psi).

SST 09350-32014 (09351-32190)

Piston stroke:

1.41 to 1.81 mm (0.0555 to 0.0713 in.)

If the piston stroke is non-standard, select another flange.

HINT:

There are 5 different thickness for the flange.

Flange thickness: mm (in.)

Fig 1: Measuring Forward Clutch Piston Stroke

THICKNESS CHART

Thickness	Thickness
3.00 (0.1181)	3.80 (0.1496)
3.20 (0.1260)	4.00 (0.1575)
3.40 (0.1338)	4.20 (0.1654)
3.60 (0.1417)	4.40 (0.1732)

INSPECT FORWARD CLUTCH PISTON SUB-ASSEMBLY
1. Check that the check ball is free by shaking the forward clutch piston sub-assembly.
2. Check that the valve does not leak by applying low-pressure compressed air.
  
  Fig 2: Applying Low-Pressure Compressed Air
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT FORWARD MULTIPLE DISC CLUTCH, CLUTCH DISC
1. Check if the sliding surfaces of the discs, plates and flanges are worn or burnt. If necessary, replace them.
  HINT:
  - If the lining of the disc is peeling off or discolored, or even if a part of the printed numbers are defaced, replace all discs.
  - Before assembling new discs, soak them in ATF for at least 15 minutes.
    
    Fig 3: Identifying Printed Number
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002