Brakes
Adjust the rear brakes to prevent improper operation of
the automatic slack adjusters, premature lining wear and
reduced brake performance.
Failure to properly adjust brakes
could cause reduced braking performance.
Brake linings contain non-asbestos
bers. Breathing brake dust may cause respiratory
or other health hazards.
When working on brake drums and linings, use the
following precautions:
• Avoiding creating dust.
• DO NOT remove brake drums and linings without
wearing proper protective equipment.
• DO NOT sand, grind, chisel, le, hammer or alter brake
linings without wearing proper protective equipment.
For safe and effective braking, adjust the brakes using
the following procedure:
1. Grease the cam bracket and spider ttings prior to
brake shoe installation.
DO NOT allow grease to come into
contact with brake linings to prevent reduction in
braking performance that can result in serious injury
or death.
2. Adjust the brake slack adjuster until the brake lining
comes into contact with the brake drum. (Figure
5-31)
Brake Slack
Adjusters
Figure 5-31. Brake Slack Adjusters
3. Apply the brakes using normal operating pressure
(the average line pressure should be 90 PSI).
Hydraulic brake pressure in excess
of 130 PSI can result in failure of the spring brake
chamber, which could result in serious injury or
death.
4. Check the amount of push rod travel. The optimum
push-rod travel should be 2.5 inches (6.35 cm).
5. Check the angle between the slack adjuster and
push rod. With the brakes applied, the angle should
be 90 degrees (+/- 5°).
6. Apply pressure to brakes and check for lining to
drum contact. Using a .010-inch (.25 mm) feeler
gauge, the lining to drum contact should range from
60 to 100 percent during brake application. Ensure
the lining is inside the drum during application.
7. Rapidly release air pressure from the brakes and
conrm that all brakes release quickly to the normal
relaxed position.
A brake drum exceeding its maximum
wear diameter is should be replaced immediately
to prevent serious injury or even death. If in doubt,
contact the brake drum manufacturer.
Lighting
Inspect lights for proper operation daily. If a light or
group of lights does not function:
• Check the circuit breaker box panel for a blown fuse.
• Examine all visible wiring connections, ensuring they
are not frayed or damaged, and securely fastened.
• Check lighting mounts for proper ground.
• Remove light lens or casing and check bulb. Replace
if needed.
• Inspect wiring harness for damage (see Schematics
in Section 6).
If broken wires are found, solder together and cover with
a shrink-wrap type of plastic covering (preferred) or
electrician’s tape to prevent contamination of the solder
joint by moisture.
If you make any repairs to the wiring harness on the
broom, always replace or repair the protective loom
covering the wiring to prevent future damage to the
wiring harness. Examine the routing of the harness and
ensure it is not subjected to excessive movement, which
often causes broken wiring.
Maintenance
Rosco CSV Variable Width Chip Spreader5-24
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