TRANSMISSION
STW34, STW37, STW40, WSM
3-S47
Separating Clutch Housing Case from Hydrostatic
Transmission (HST)
1. Place a disassembly stand under the clutch housing (2) and
HST (1).
2. Support the clutch housing (2) with the lift strap.
3. Remove the clutch housing mounting screws and nuts to
separate the clutch housing (2) from the HST (1).
4. Remove the 3P delivery pipe (3).
(When reassembling)
• Apply liquid gasket (Three Bond 1206C or equivalent) to the
joint face of the clutch housing and HST.
9Y1211109TRS0033US0
(4) Separating HST (Hydrostatic Transmission)
Trunnion Wheel
1. Remove the trunnion wheel mounting screw (2).
2. Pull out the trunnion wheel (1) by using two jack screws M12 ×
1.25 (3).
9Y1211109TRS0034US0
Separating HST (Hydrostatic Transmission)
1. Place a disassembly stand under the HST (2) and mid case (1).
2. Remove the HST mounting screw and nuts to separate the HST
(2) from the mid case (1).
• Do not pull out the front drive shaft (3) when you do not
separate the mid case (1).
(When reassembling)
• Apply liquid gasket (Three Bond 1206C or equivalent) to the
joint face of the HST and mid case.
9Y1211109TRS0035US0
Tightening torque
Clutch housing mounting
screw and nut
39.3 to 44.1 N·m
4.0 to 4.5 kgf·m
29.0 to 32.5 lbf·ft
(1) HST (Hydrostatic Transmission)
(2) Clutch Housing
(3) 3P Delivery Pipe
(1) Trunnion Wheel
(2) Trunnion Wheel Mounting Screw
(3) Jack Screw
Tightening torque
HST mounting screw and
nut
39.3 to 44.1 N·m
4.0 to 4.5 kgf·m
29.0 to 32.5 lbf·ft
(1) Mid Case
(2) HST
(3) Front Drive Section
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