Bendix Commercial Vehicle Systems R-8P PRESSURE EQUALIZING PILOTRELAY - Manual (Page 3)

3
FIGURE 5 - SCHEMATIC OF TYPICAL DOLLY SYSTEM
CONTROL FROM
TOWING TRAILER
SUPPLY FROM
TOWING
TRAILER
S = SUPPLY
SUPPLY TO
SECOND TRAILER
RE-6 ™ RELAY
EMERGENCY
VALVE
SV-1 ™
SYNCHRO VALVE
SC-1 ™ SINGLE
CHECK VALVE
CONTROL TO
SECOND TRAILER
R-8P ™
RELAY VALVE
OPERATION AND LEAKAGE TEST
1. Block the wheels and fully charge the air system. Adjust
the brakes.
2. Apply and release the service brakes several times and
check for prompt response of the brakes at all appropriate
wheels.
3. With the air system fully charged, apply a soap solution
to the exhaust of the R-8P ™ valve. Leakage of a 1" bubble
in 5 seconds is permissible.
4. Make and hold a full brake application and again apply a
soap solution to the R-8P ™ valve exhaust. Leakage of a
1" bubble in 3 seconds is permissible.
5. With the brakes still applied, apply a soap solution around
the valve where the cover meets the body. No leakage at
this point is permitted. If the valve is unable to pass
these operation and leakage tests, repair or replace it
with a new or genuine Bendix remanufactured unit,
available at any authorized parts outlet.
WARNING! PLEASE READ AND FOLLOW
THESE INSTRUCTIONS TO AVOID
PERSONAL INJURY OR DEATH:
When working on or around a vehicle, the following
general precautions should be observed at all times.
1. Park the vehicle on a level surface, apply the
parking brakes, and always block the wheels.
Always wear safety glasses.
2. Stop the engine and remove ignition key when
working under or around the vehicle. 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 use of those tools.
4. If the work is being performed on the vehicle’s air
brake system, or any auxiliary pressurized air
systems, 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.
5. Following the vehicle manufacturer’s
recommended procedures, deactivate the electrical
system in a manner that safely removes all
electrical power from the vehicle.
6. Never exceed manufacturer’s recommended
pressures.
7. Never connect or disconnect a hose or line
containing pressure; it may whip. Never remove a
component or plug unless you are certain all
system pressure has been depleted.
8. Use only genuine Bendix ® replacement parts,
components and kits. Replacement hardware,
tubing, hose, fittings, etc. must be of equivalent
size, type and strength as original equipment and
be designed specifically for such applications and
systems.
C = CONTROL
D = DELIVERY
E = EXHAUST
EM = EMERGENCY