wsm STW37 Workshop Manual page 273

STW34, STW37, STW40, WSM
(Continued)
1. Remove the internal snap ring (31) and remove the pressure
plate (28), steel plate (30) and clutch disc (29).
2. Hydraulic clutch pack can be disassembled as shown in figure.
(When reassembling)
• Apply transmission oil to the clutch disc (22), (29).
• Apply transmission oil to the D-ring and O-ring on the piston
(25).
• Replace the D-ring and O-ring with new one.
• Install the internal snap rings (14), (31) with their catches fitting
the groove of the clutch case (6). Be sure also that the sharp
edges come outside.
• Do not confuse the 3 types of steel plates, one is steel plate,
another is steel plate with holes, and the remainder is the plate
with holes and rubber plugs.
• Install the steel plates in order of "steel plate with holes", "steel
plate with holes and rubber plugs", "steel plate with holes",
"steel plate with holes and rubber plugs" and "steel plate without
hole" from the inside.
• The hole position should not correspond to the hole position of
adjacent plate. (See figure.)
• After finishing reassembling, feed compressed air (about
2
5 kgf/cm ) through the counter shaft to see if the piston (25)
moves smoothly.
(Reference)
• Thickness of steel plate and pressure plate
Steel plate (20), (30):
1.0 mm (0.039 in.)
Steel plate (with hole), (21):
1.2 mm (0.047 in.)
Pressure plate (15), (28):
2.0 mm (0.079 in.)
(6) Clutch Case
(14) Internal Snap Ring
(15) Pressure Plate
(17) External Snap Ring
(18) Spring
(19) Collar
(20) Steel Plate
(21) Steel Plate (with Holes)
(22) Clutch Disc
3-S59
TRANSMISSION
(23) Rubber Plug
(24) D-ring
(25) Piston
(26) D-ring
(27) O-rings
(28) Pressure Plate
(29) Clutch Disc
(30) Steel Plate
(31) Internal Snap Ring
9Y1211109TRS0056US0
KiSC issued 11, 2014 A