STV32 · STV36 · STV40, WSM TRANSMISSION
3-S50
Steel Plate and Pressure Plate Wear
1. Measure the steel plate thickness with vernier calipers.
2. Measure the pressure plate thickness with vernier calipers.
3. If the thickness is less than the allowable limit, replace.
Piston Return Spring Free Length and Tension
1. Measure the free length of the piston return spring with vernier
calipers.
2. Place the piston return spring on a spring compression tester
and compress to the specified length, and read the gauge.
3. If the measurement is less than the allowable limit, replace.
Clearance between Counter Shaft B and 27T Gear
1. Measure the counter shaft B O.D. with an outside micrometer.
2. Measure the 27T gear I.D. with an inside micrometer, and
calculate the clearance.
3. If the clearance exceeds the allowable limit, replace.
Steel plate wear
Factory spec.
0.95 to 1.05 mm
0.0374 to 0.0413 in.
Allowable limit
0.8 mm
0.031 in.
Pressure plate wear
Factory spec.
1.95 to 2.05 mm
0.0768 to 0.0807 in.
Allowable limit
1.8 mm
0.071 in.
0000007723E
Piston / return spring
free length
Factory spec.
44.0 mm
1.73 in.
Piston return spring
tension
Factory spec.
638.7 N / 26 mm
65.13 kgf / 26 mm
143.6 lbs / 1.02 in.
Allowable limit
539.4 N / 26 mm
55 kgf / 26 mm
121.3 lbs / 1.02 in.
0000007724E
Clearance between
counter shaft B and 27T
gear
Factory spec.
0.040 to 0.082 mm
0.00157 to 0.00323 in.
Allowable limit
0.1 mm
0.004 in.
Counter shaft B O.D. Factory spec.
24.959 to 24.980 mm
0.98264 to 0.98346 in.
27T gear I.D. Factory spec.
25.020 to 25.041 mm
0.98504 to 0.98587 in.
(1) 27T Gear (2) Counter Shaft B
0000007725E
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