wsm STW37 - Servicing; Bi-Speed Hydraulic Clutch and Gears

TRANSMISSION
STW34, STW37, STW40, WSM
3-S67
[4] SERVICING
(1) Bi-speed Hydraulic Clutch and Gears
Checking Bearing
1. Hold the inner race, and push and pull the outer race in all
directions to check for wear and roughness.
2. Apply transmission fluid to the bearing, and hold the inner race.
Then, turn the outer race to check rotation.
3. If there is any problem, replace it.
9Y1211109TRS0066US0
Clutch Disc Wear
1. Measure the clutch disc thickness with vernier calipers.
2. If the thickness is less than the allowable limit, replace it.
9Y1211109TRS0067US0
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.
9Y1211109TRS0068US0
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.
9Y1211109TRS0069US0
Clutch disc wear
Factory specification
1.915 to 2.085 mm
0.0754 to 0.0821 in.
Allowable limit
1.4 mm
0.055 in.
Steel plate wear
Factory specification
0.95 to 1.05 mm
0.0374 to 0.0413 in.
Allowable limit
0.8 mm
0.031 in.
Pressure plate wear
Factory specification
1.95 to 2.05 mm
0.0768 to 0.0807 in.
Allowable limit
1.8 mm
0.071 in.
Piston / return spring free
length
Factory specification
44.0 mm
1.73 in.
Piston return spring
tension
Factory specification
638.7 N / 26 mm
65.13 kgf / 26 mm
143.6 lbf / 1.02 in.
Allowable limit
539.4 N / 26 mm
55 kgf / 26 mm
121.3 lbf / 1.02 in.
KiSC issued 11, 2014 A