NMC-WOLLARD 2021Truax Blvd., Eau Claire, WI 54703, Phone (715) 835-3151, Fax (715) 835-6625
M140 Tow Tractor Manual No. 46054
PAGE 1-40
CHAPTER 2 MAINTENANCE
1 SERVICING
AUGUST 31, 2008
1.7 SHIFT INHIBITOR ADJUSTMENT
1. Place the shift selector in neutral, wheel, transmission is in neutral.
Do not unhook the cable connection.
3. Remove the deck plate to gain access to the transmission area.
4. Check that the solenoid engages the locking slot on the locking swing arm
freely, without binding, when in neutral. Loosen the solenoid mounting slight
and move the solenoid as required if adjustment is needed. Retighten the
mounting. The locking swing arm is located on the transmission selector shaft.
5. When adjusting the inhibitor the objective is to set the pressure contact point
within the switch (located in the brake line) so the green light never lights when
pressing on the brake pedal until the vehicle is completely stopped. If the
vehicle is almost stopped when the green light comes on, even as slow
as1-2mph, the light will indicate that the inhibitor is unlocked. Transmission
damage may occur if the operator shifts the transmission through neutral to
change vehicle direction while the tractor is still moving.
6. The following procedure is recommended for correctly adjusting the switch,
best done by two people:
a. Without moving the vehicle but with the engine running, press down
enough to stop the vehicle aggressively.
b. Unscrew the phillips screw holding the white nylon cap and remove the
cap and screw. Turn the exposed allen head screw clockwise to increase
the required brake pressure and counter clockwise to decrease the
pressure (1/4 turn equals approximately 50 psi).
c. Stop adjusting when the green light comes on.
d. Drive the vehicle and make several aggressive stops, similar to an
operator driving too fast. If the green light lights before the vehicle comes
to a complete stop, the switch is adjusted too low. Repeat the adjustment
pedal after the vehicle has come to a complete stop.
e. Replace the nylon cap
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