Servicing; Bi-Speed Hydraulic Clutch And Gears - wsm STW37 Workshop Manual

STW34, STW37, STW40, WSM

[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.
Clutch Disc Wear
1. Measure the clutch disc thickness with vernier calipers.
2. If the thickness is less than the allowable limit, replace it.
Factory specification
Clutch disc wear
Allowable limit
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.
Factory specification
Steel plate wear
Allowable limit
Factory specification
Pressure plate wear
Allowable limit
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.
Piston / return spring free
Factory specification
length
Factory specification
Piston return spring
tension
Allowable limit
3-S67
TRANSMISSION
9Y1211109TRS0066US0
1.915 to 2.085 mm
0.0754 to 0.0821 in.
1.4 mm
0.055 in.
9Y1211109TRS0067US0
0.95 to 1.05 mm
0.0374 to 0.0413 in.
0.8 mm
0.031 in.
1.95 to 2.05 mm
0.0768 to 0.0807 in.
1.8 mm
0.071 in.
9Y1211109TRS0068US0
44.0 mm
1.73 in.
638.7 N / 26 mm
65.13 kgf / 26 mm
143.6 lbf / 1.02 in.
539.4 N / 26 mm
55 kgf / 26 mm
121.3 lbf / 1.02 in.
9Y1211109TRS0069US0
KiSC issued 11, 2014 A