wsm STW37 - Hydraulic PTO Clutch and Gears

TRANSMISSION
STW34, STW37, STW40, WSM
3-S69
(2) Hydraulic PTO Clutch and Gears
Checking Bearing
• See page 3-S70.
9Y1211109TRS0073US0
Clutch Disc Wear
1. Measure the clutch disc thickness with vernier calipers.
2. If the thickness is less than the allowable limit, replace it.
9Y1211109TRS0074US0
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.
9Y1211109TRS0075US0
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
1.70 to 1.90 mm
0.067 to 0.075 in.
Allowable limit
1.55 mm
0.061 in.
Steel plate wear
(without hole)
Factory specification
0.95 to 1.05 mm
0.0374 to 0.0413 in.
Allowable limit
0.8 mm
0.031 in.
Steel plate wear
(with holes, with holes
and rubber plugs)
Factory specification
1.15 to 1.25 mm
0.045 to 0.049 in.
Allowable limit
1.10 mm
0.043 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