Cushman MINUTE MISER, Technician'S Repair And Service Manual

Page: 84 / 119

BRAKES
Page J-3
Repair and Service Manual
Read all of Section B and this section before attempting any procedure. Pay particular attention to all Notes, Cautions and Warnings
strap permit the brake levers to release fully when the
brake pedal is in the released position.
Fig. 3 Wheel Brake Adjustment
How the Parking Brake Works
Depressing the brake pedal moves the latch arm against
the catch bracket. As the brake pedal is depressed, the
brake is applied until the notch in the latch arm engages
with the catch bracket. The brake pedal is held in the
applied (down) position by the catch bracket. The latch
arm is held in position by the tension in the brake linkage.
The Brake can be released by depressing the brake,
which permits the spring loaded Brake pedal to return to
its original position, disengaging the latch arm from the
catch bracket. This is the preferred method which mini-
mizes wear on components.
BRAKE DRUM AND SHOE REMOVAL
Brake Drum Removal
Tool List Qty. Required
Hydraulic floor jack ...................................................... 1
Jack stands ................................................................. 4
Chocks ........................................................................ 4
Plastic faced hammer.................................................. 1
Wear a dust mask
and eye protection
whenever working
on wheel brakes. Do not use pressurized air
t o b l o w d u s t f r o m b r a k e a s s e m b l i e s .
Replace both brake shoes on both wheels if
one or more shoes is worn below .06" (1.5
mm) thickness at any point.
To remove the brake drums, lift the entire vehicle and
support on jack stands. Tap the brake drum lightly with a
plastic faced hammer to loosen the drum. If the drum will
not come off, it will be necessary to loosen the adjusting
screw.
Remove the brake drum.
D o n o t m a c h i n e
d r u m s i n o r d e r t o
true up the braking
surface.
Slight scores in the drum brake surface may be removed
by lightly polishing with a fine emery cloth. An extensively
scored drum will cause excessive brake lining wear and
must be replaced with a new drum. An out-of-round drum
makes accurate brake adjustment impossible due to its
eccentric action. A drum that is more than .010 inch out-
of-round on the inside diameter should be replaced with
a new drum.
Gasoline or kerosene should not
be used as there is a danger that
a portion of the diluted oily substrate may be left on
Brakes adjust only while the vehicle is moving.
When the brake pedal is depressed, the brake lever (not
shown in picture) moves toward the front of the vehicle.
The other end of the brake lever moves to the rear of the
vehicle where it contacts the brake adjusting arm, causing
it to move.
The brake adjuster arm moves away from the star wheel.
The amount of adjuster travel is limited by the amount of
brake shoe travel required to contact the brake drum. The
amount of travel increases as the brake shoe lining wears.
When the brake pedal is released, the adjuster spring
retracts the brake adjuster arm which contacts the star
wheel. Note that adjustment only takes place when the
brake pedal is released while the vehicle is in motion.
If the brake shoes have worn far enough to permit the
brake adjuster arm to contact the next tooth of the star
wheel, the star wheel will be advanced by the tension
applied to the adjuster arm by the adjuster spring.
If the brake shoes have not worn enough to permit the
brake adjuster arm to contact the next tooth of the star
wheel, the brake adjuster arm will move on the flat of the
star wheel. The star wheel does not rotate and no
adjustment occurs.
Star Wheel
Adjusting Screw
Brake Adjusting Spring