(2) Brake shoe removal. Remove brake shoes
(a) Jack up the axle on the side of the wheel to
be worked on, and block the axle so that the wheel is
supported off the ground. Be sure the machine is
adequately blocked to prevent tipping.
Remove the brake drum nuts shown in the illustration
and remove the brake drum.
spring, remove the "C" washers from guide pins and
anchor pins, and remove the brake shoes.
install brake shoes.
j. Windshield Wiper.
(1) Motor replacement. Figure 7-49 shows the
location of the windshield wiper motor. Before replacing
a wiper motor which is apparently not operating properly,
check system air pressure. Air pressure in the reservoir
which supplies the wiper motor must be above 95 psi, or
there will be no air available for running the wiper motor,
since this is a low air condition. To remove the wiper
motor, remove the wiper arm nut, disconnect the two air
(1) Adjustment. Adjustment of all service brakes is
supply lines and the vent line, remove the motor bolts,
the same, regardless of which wheel is involved. Adjust
and remove the wiper motor.
service brakes as follows:
(a) Jack up the wheel at which the brake is to be
remove the blade nut, and replace the windshield wiper
adjusted so that it does not contact the ground.
k. Low Air Pressure Valve. Figure 7-49 shows the
(b) Spin the wheel and keep it spinning through
position of the low air pressure valve when air pressure
step (c) below.
is below safe operating pressure. To remove the low air
pressure valve, disconnect the air line and remove the
attaching nut and washer.
sleeve and turn the adjusting screw until the brake shoe
just makes contact with the brake drum. This point will
7-47. Engine Manifold
be apparent, since this is the point at which the wheel will
a. Intake Manifold.
slow down. Use an open end or socket wrench to turn
(1) Inspection. Inspect the intake manifold for
the adjusting screw and hold the locking sleeve in as far
loose nuts, leaks, cracks, or other physical damage.
as it will go.
(d) Back off on the adjusting screw until the
remove and replace the intake manifold.
wheel just turns freely. Allow the locking sleeve to return
to the upper (locking) position in order to maintain the
Repair the intake manifold by
adjustment just made.
replacing any damaged intake manifold components.