Servicing; Bi-Speed Hydraulic Clutch Pack And Gears - Kubota WSM STa-30 Workshop Manual

STα-30 · STα-35, WSM

[3] SERVICING

(1) Bi-speed Hydraulic Clutch Pack 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 defect, 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 spec.
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 spec.
Steel plate wear
Allowable limit
Factory spec.
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
Factory spec.
free length
Factory spec.
Piston return spring
tension
Allowable limit
7-S11
BI-SPEED TURN
W1024036
1.915 to 2.085 mm
0.07539 to 0.08209 in.
1.4 mm
0.055 in.
W1024320
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.
W1024487
44 mm
1.73 in.
638.7 N / 26 mm
65.13 kgf / 26 mm
143.6 lbs / 1.02 in.
539.4 N / 26 mm
55 kgf / 26 mm
121.3 lbs / 1.02 in.
W1024789
KiSC issued 11, 2006 A