wsm STW37 Workshop Manual page 269

STW34, STW37, STW40, WSM
Port Block and Charge Relief Valve
1. Separate the port block (2) after removing the mounting screws.
2. Remove the spring (3) and poppet L (4).
3. Remove the gasket (1) and the pipe (5).
(When reassembling)
• Tighten the port block (2) mounting screws diagonally.
• Be sure to fix the O-ring.
• Apply transmission oil to the O-ring and poppet L.
Tightening torque Port block mounting screw
(1) Gasket
(2) Port Block
(3) Spring
Valve Plates for Pump and Motor
1. Remove the valve plates (1), (3).
(When reassembling)
• Set the grooves (2) of valve plates to spring pins (5) firmly.
IMPORTANT
• Valve plates (1), (3) are not interchangeable. Valve plate (1)
of pump has two fish tails (4) and the valve plate (3) of
motor has not it.
(1) Valve Plate (Pump)
(2) Grooves
(3) Valve Plate (Motor)
Cylinder Block
1. Pull out the cylinder block (2) with piston (1) as a unit.
IMPORTANT
• Make alignment mark on the piston and cylinder when
removing the piston from cylinder block.
(When reassembling)
• Apply transmission oil to the thrust plate (3) and pistons.
• Be sure to align the marks when assembling pistons to the
cylinder block.
(1) Piston
(2) Cylinder Block (Pump)
Pump Shaft and Motor Shaft
1. Remove the internal snap ring (5) then remove the oil seal (4).
2. Remove the external snap ring (3) and draw out the pump shaft
(1).
3. Draw out the motor shaft (2).
(When reassembling)
• Apply transmission oil to the oil seal.
• Replace oil seal with new one.
(1) Pump Shaft
(2) Motor Shaft
(3) External Snap Ring
3-S55
TRANSMISSION
39.3 to 44.1 N·m
4.0 to 4.5 kgf·m
29.0 to 32.5 lbf·ft
(4) Poppet L
(5) Pipe
9Y1211109TRS0050US0
(4) Fish Tail
(5) Spring Pin
9Y1211109TRS0051US0
(3) Thrust Plate
(4) Cylinder Block (Motor)
9Y1211109TRS0052US0
(4) Oil Seal
(5) Internal Snap Ring
9Y1211109TRS0053US0
KiSC issued 11, 2014 A