Checking, Disassembling And Servicing; Checking And Adjusting - wsm STW37 Workshop Manual

STW34, STW37, STW40, WSM

4. CHECKING, DISASSEMBLING AND SERVICING

[1] CHECKING AND ADJUSTING

Adjusting Neutral
1. Disengage the front wheel drive lever. (Drive only rear wheels.)
2. Set the range gear shift lever at 3rd speed position.
3. Lift the rear of the tractor so that the rear wheels are off the
ground and operate the engine at low idling and drive only rear
wheels.
4. Slightly loosen the holder shaft mounting screw (1).
5. Rotate the holder shaft (4) clockwise with a screw-driver, so that
the rear wheels turn reverse.
6. Then rotate it counterclockwise until wheels stop completely.
7. Put a mark aligning the groove (2) on neutral holder (Position
"A").
8. Rotate the holder shaft (4) counterclockwise so that the rear
wheels turn forward.
9. Then rotate it clockwise until wheels stop completely.
10. Put mark aligning the groove (2) on neutral holder (Position
"B").
11. Set the holder shaft (4), where it is in the center between the
position "A" and "B", and tighten the holder shaft mounting
screw firmly (Position "N").
NOTE
• Operate the engine at maximum speed when checking, and
operate the engine at low idling speed when adjusting.
• When the wheels tend to turn forward, rotate neutral holder
clockwise.
• When the wheels tend turn reverse, rotate neutral holder
counterclockwise.
Groove angle in neutral
Reference value
"X"
(1) Holder Shift Mounting Screw
(2) Groove
HST Safety Switch
1. After adjusting the HST neutral position, be sure to adjust the
HST safety switch (2).
2. Set the HST at neutral position.
3. Disconnect the connector (3) and remove the HST safety switch
(2) once.
4. Connect the leads of an ohmmeter to the HST safety switch
lead terminal.
5. Screw in the HST safety switch (2) until the ohmmeter begins to
show 0 ohm.
6. Further screw in the HST safety switch 1/2 turn, and tighten the
lock nut (1).
IMPORTANT
• Be sure to check, the ohmmeter indicates infinity when the
speed control pedal is depressed for both forward and
reverse.
(1) Lock Nut
(2) HST Safety Switch
3-S11
TRANSMISSION
Approx.
1.80 rad
103 °
(3) Neutral Holder
(4) Holder Shaft
9Y1211109TRS0006US0
(3) Connector
9Y1211109TRS0007US0
KiSC issued 11, 2014 A