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radiator frequently in extremely dusty and dirty
conditions.
Note: If engine shuts off due to overheating,
first check the radiator and screen for excessive
buildup of debris.
Clean the radiator as follows:
1. Remove the screen.
2. Working from the fan side of the radiator, blow
with low pressure (25 psi) compressed air (do
not use water). Repeat the step from the front
of the radiator and again from the fan side.
3. After the radiator is thoroughly cleaned, clean
out debris that may have collected in the
channel at the radiator base.
4. Clean and install the screen.
Brake Maintenance
Adjusting the Parking Brake
Interlock Switch
1. Turn the engine off and remove the ignition
key. Do not engage the parking brake.
2. Remove the knob from parking brake rod
and screws from the steering tower cover
(Figure 56).
Figure 56
1. Steering tower cover
2. Parking brake knob/rod
3. Slide the cover up the steering shaft to expose
the parking brake switch (Figure 57).
4. Loosen the screws and nuts securing the
parking brake switch to the left side of the
steering tower (Figure 56).
3. Switch mounting screws
4. Cover mounting screws
5. Align the parking brake rod paddle with the
switch plunger (Figure 57)
Figure 57
1. Parking brake interlock
switch
6. Press down on the parking brake rod and push
up on the switch until the compressed length of
the switch plunger is 0.030 inches (Figure 57,
inset) . This is the distance between the brake
rod paddle and the switch plunger housing.
7. Tighten the switch mounting screws and nuts.
8. With the parking brake disengaged, the switch
circuit should have continuity. If there is no
continuity, move the switch down slightly until
there is continuity.
9. Check the adjustment as follows:
A. Engage the parking brake.
B. Press the traction pedal while the engine is
running and the PTO lever is disengaged.
The engine should stop within 2 seconds.
If engine stops, the switch is operating
correctly; thus, continue operation. If
engine does not stop, there is a malfunction
in the interlock system that must be
corrected.
10. Install the steering tower cover and brake rod
knob.
Adjusting the Service Brakes
Adjust the service brakes when there is more than
one inch (25 mm) of "free travel" of the brake
pedals, or when the brakes do not work effectively.
50
2. Parking brake rod paddle
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