Hydraulic Pto Clutch And Gears - wsm STW37 Workshop Manual

STW34, STW37, STW40, WSM

(2) Hydraulic PTO Clutch and Gears

Checking Bearing
• See page 3-S70.
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
(without hole)
Allowable limit
Factory specification
Steel plate wear
(with holes, with holes
and rubber plugs)
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-S69
TRANSMISSION
9Y1211109TRS0073US0
1.70 to 1.90 mm
0.067 to 0.075 in.
1.55 mm
0.061 in.
9Y1211109TRS0074US0
0.95 to 1.05 mm
0.0374 to 0.0413 in.
0.8 mm
0.031 in.
1.15 to 1.25 mm
0.045 to 0.049 in.
1.10 mm
0.043 in.
1.95 to 2.05 mm
0.0768 to 0.0807 in.
1.8 mm
0.071 in.
9Y1211109TRS0075US0
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