Bendix Commercial Vehicle Systems A2LS HYD DRUM BRAKES W/PARKING 2/08 - Manual (Page 5)

5
FIGURE 10 - REAR VIEW OF THE BACKING PLATE
(DIRTSHIELD)
CITY DELIVERY
Every 15,000 miles (24,000 km), two months, or 300
operating hours, whichever occurs first, perform the service
checks outlined in this manual.
SERVICE CHECKS
With the vehicle on a level surface, block the wheels to
prevent movement of the vehicle.
1. Remove one or more of the lining inspection plugs.
Check the thickness of the brake linings.
2. Activate the brake pedal. Observe the brake shoes
through the inspection holes and make sure that the
brake shoes move against the drums smoothly and
promptly. Release the brake pedal and make sure the
brake shoes retract promptly and smoothly.
3. Apply the parking brake. Observe the brake shoes
through the inspection hole and make sure the brake
shoes engage the drum.
4. Check all hydraulic fittings and the surface of the
backing plate (dirtshield) for any evidence of hydraulic
fluid leakage.
5. Refer to the vehicle manual for service checks of other
brake related items.
WARNING!
When working on or around brake systems and
components, the following precautions must be
observed:
WARNING! PLEASE READ AND FOLLOW
THESE INSTRUCTIONS TO
AVOID
PERSONAL INJURY OR DEATH:
When working on or around brake systems and
components, the following precautions must be
observed at all times:
1. Park the vehicle on a level surface, apply the
parking brakes, and always block the wheels.
When working around or under the vehicle, stop
the engine and remove the key from the ignition.
Always keep hands away from chambers as they
may apply as system pressure drops. Always wear
safety glasses.
2. When working in the engine compartment, the
engine should be shut off and the ignition key
should be removed. Where circumstances require
that the engine be in operation, extreme caution
should be used to prevent personal injury resulting
from contact with moving, rotating, leaking, heated
or electrically charged components.
3. Do not attempt to install, remove, disassemble or
assemble a component until you have read and
thoroughly understand the recommended
procedures. Use only the proper tools and observe
all precautions pertaining to the use of those tools.
4. Following the vehicle manufacturer’s
recommended procedures, deactivate the electrical
system in a manner that safely removes all
electrical power from the vehicle.
5. If the vehicle is equipped with an air over hydraulic
brake system or any auxiliary pressurized air
system, make certain to drain the air pressure from
all reservoirs before beginning ANY work on the
vehicle. If the vehicle is equipped with an AD-IS
™
air dryer system or a dryer reservoir module, be
sure to drain the purge reservoir.
6. Never connect or disconnect a hose or line
containing pressure; it may whip. Never remove a
component or pipe plug unless you are certain all
system pressure has been depleted.
7. Never exceed manufacturer’s recommended
pressure.
8. Never attempt to disassemble a component until
you have read and understand all recommended
procedures. Some components contain powerful
springs and injury can result if not properly
disassembled. Use only proper tools and observe
all precautions pertaining to use of those tools.
9. Use only genuine Bendix ® replacement parts,
components and kits.
A. Use only components, devices and mounting
and attaching hardware specifically designed
for use in hydraulic brake systems.
B. All replacement hardware, tubing, hose,
fittings, etc. must be of equivalent size, type
and strength as the original equipment.
10. Components with stripped threads or damaged
parts should be replaced rather than repaired. Do
not attempt repairs requiring machining or welding
unless specifically stated and approved by the
vehicle and component manufacturer.
11. Prior to returning the vehicle to service, make
certain all components and systems are restored to
their proper operating condition.
ADJUSTMENT
OPENING