MECHANICAL BRAKES
Read all of Section B and this section before attempting any procedure. Pay particular attention to all Notes, Cautions and Warnings
directly over the brake mechanism. Use a small straight
blade screwdriver to raise the adjuster arm
just above
the star wheel.
Loosen the star wheel to retract the brake shoes and
remove the brake drum.
I
NOTE
I
Pay particular attention to the location of the
-
- inner brake drum washer (6) inside the brake
drum, which may be on the axle shaft or attached to the rear of
the drum hub. This washer must be reinstalled when the brake
is reassembled.
To install the brake drum, clean the axle shaft and the
splines on the brake drum to remove dirt, grease and for
eign matter. Apply a small amount of anti-seize com
pound to the axle spline. Install the inner brake drum
washer (6) and slide the brake drum (5) into place.
Check to ensure the nose of drum hub is beyond the end
of the axle splines. If not, remove drum and install one
additional inner brake drum washer (total of 2) to obtain
required spacing.
_AWARNING_A
Do not back off nut to
install cotter pin.
Install the remaining hardware and tighten the nut to 80-
90 ft. lbs. (108 - 122 Nm) torque. Continue to tighten
until a new cotter pin can be installed through the castel
lated nut and the hole in the axle. Maximum torque is
140 ft. lbs. (190 Nm).
Wheel Brake Service
Wheel brake service consists of disassembly, cleaning,
inspection, lubrication and re-assembly of the wheel
brake. Worn or damaged components must be replaced.
Wheel brake service is required periodically as a preven
tive maintenance measure (see Periodic Service Sched
ule in Section A). The wear rate of brake shoes and
required service intervals will vary based on usage, ter
rain and other conditions. It is recommended that wheel
brake service be performed periodically on a sample of
vehicles within the service fleet to establish the most effi
cient and effective service interval.
Remove the brake drum as described in 'Brake Drum
Removal and Installation'.
_AWARNING_A
Wear eye protection and
a mask when cleaning
brake components. Do
not use compressed air to remove brake dust from
brake assembly.
CAUTION
Do NOT use a commercial brake clean
er unless the entire brake has been dis-
assembled.
Remove any accumulated brake dust with a brush.
Remove the brake shoes. See 'Brake Shoe and Adjuster
Replacement' on page M-17.
Clean backing plate with a commercial brake cleaner.
Allow to dry completely.
CAUTION
It is important that the friction areas
between the backing plate and the
brake shoes be lubricated. Be careful not to allow lubricant to
contact the braking portion of the brake shoes or the friction sur
face of the brake drum. Use only recommended lubricants.
Lubricate the backing plate friction points of the shoes
and moving anchor with Multi Purpose Grease (MPG)
lubricant (Ref Fig. 22 on page M-16).
Lubricate
(3) Bosses
Each Side
Backing Plate
Lubricate Surfaces In and Around
Slots and Plastic Slide Plate
Lubricate
(3) Bosses
Each Side
Fig. 22 Wheel Brake Lubrication Points
Page M-16
Repair and Service Manual
Summary of Contents for FLEET 1999
Page 6: ...TABLE OF CONTENTS Notes __________________________ _ Page iv Repair and Service Manual...
Page 10: ...SAFETY INFORMATION Notes _________________________ _ Page viii Repair and Service Manual...
Page 26: ...SAFETY Notes _ _ ___________________________ _ Page B ii Repair and Service Manual...
Page 48: ...BODY Notes _ _ ___________________________ _ Page C ii Repair and Service Manual...
Page 56: ...WHEELS AND TIRES Notes __________________________ _ Page D ii Repair and Service Manual...
Page 72: ...SPEED CONTROL Notes _ _ ________________________ _ Page F ii Repair and Service Manual...
Page 80: ...ENGINE Notes _ _ __________________________ _ Page G ii Repair and Service Manual...
Page 94: ...FUEL SYSTEM Notes _ _ _________________________ _ Page H ii Repair and Service Manual...
Page 110: ...ELECTRICAL Notes _ _ _________________________ _ Page K ii Repair and Service Manual...
Page 120: ...ACCESSORY WIRING Notes __________________________ _ Page L ii Repair and Service Manual...
Page 148: ...REAR SUSPENSION Notes __________________________ _ Page N ii Repair and Service Manual...
Page 154: ...REAR AXLE Notes _ _ ___________________________ _ Page P ii Repair and Service Manual...
Page 158: ...PAINT Notes _ _ ___________________________ _ Page Q ii Repair and Service Manual...
Page 162: ...TROUBLESHOOTING Notes _ _ ________________________ _ Page R ii Repair and Service Manual...
Page 170: ...LIMITED WARRANTY Notes __________________________ _ Page S ii Repair and Service Manual...
Page 176: ...LIMITED WARRANTY Notes __________________________ _ Page S 6 Repair and Service Manual...
Page 178: ...GENERAL SPECIFICATIONS Notes _________________________ _ Page T ii Repair and Service Manual...