Bendix Commercial Vehicle Systems ATR-1 ANTILOCK TRACTION RELAY 02/11 - Manual (Page 9)

9
INSTALLATION
1. Install the assembled unit on the vehicle.
2. Reconnect all air lines and wire harnesses to the unit
using the identifi cation made during REMOVAL step 1.
3. After installing the unit, perform the OPERATION &
LEAKAGE TESTS for the air valve before placing the
vehicle in service.
DISASSEMBLY
PREPARATION FOR DISASSEMBLY
1. Remove all air fi ttings and plugs from the valve.
2. Mark the relationship of the valve cover(3) to the
body(4) and, if the valve is equipped with a mounting
bracket(15), mark the relationship of the bracket to the
cover and body(4).
3. Mark the relationship of the electronic controller(1) to
the cover(3).
DISASSEMBLY
The following disassembly and assembly procedure
is presented for reference purposes only. Instructions
packaged with repair and maintenance kits should always
be followed instead of the instructions presented here.
CAUTION: The valve may be lightly clamped in a bench
vise during disassembly, however, over clamping will
result in damage to the valve and result in leakage
and/or malfunction. If a vise is to be used, position
the valve so that the jaws bear on the supply ports on
opposing sides of the valve body.
1. Remove and retain the four cap screws(2) that secure
the electronic controller(1) to the cover(3), then
separate and retain the controller(1), from the cover(3).
Note: In some instances a controller, Item 1, will not be
present and only a cover plate will be noted. Remove
the cover plate in the same manner described for the
controller.
2. While holding the exhaust cover(6), remove the
retaining ring(5) that secures it to the body(4).
3. Remove the exhaust cover(6) along with both o-rings(7
& 8).
4. Remove the valve spring(9), valve retainer(10), and the
valve assembly(11) from the body(4).
5. Remove and retain the two long cap screws(12) and
nuts(13) that secure the cover(3) to the body(4).
6. Remove and retain the two cap screws and lock
washers(14) that secure the bracket(15) to the cover(4),
then remove and retain the bracket.
7. Remove and retain the two short cap screws(16) that
secure the cover(3) to the body(4).
8. Separate the cover(3) from the body(4), then remove
the sealing ring(17) and o-ring(18).
9. Remove the relay piston(19) and relay piston spring(20)
from the body(4). NOTE: The relay piston spring, item
14 is not used in all valves.
10. Remove the o-ring(21) from the relay piston(19).
11. Remove the retaining ring(22).
Then, depending on the internal confi guration:
12a. Remove check valve seat(23), with o-rings(27 &
28). Remove o-rings(27 & 28) from the check valve
seat. Then remove the check valve(24), guide(25),
and spring(26).
OR,
12b. Remove plug(35), with o-ring(34).
13. Remove the inlet seat(29) with o-rings(30 & 31), then
remove o-rings(30 & 31) from the inlet seat(29).
14. Remove the blend back piston(32) from the valve
cover(3). Remove both o-rings(33 & 34) and the piston
stop ring(35). Note: The piston stop ring may have to be
removed from the cover(3) rather than the piston(32).
15. Do not disassemble the ATR-1 ™ valve any further than
described here.
CLEANING & INSPECTION
1. Using mineral spirits or an equivalent solvent, clean and
thoroughly dry all metal parts. Do not damage bores
with metal tools.
2. Wash all retained, nonmetallic components in a soap
and water solution making certain to rinse and dry
thoroughly.
3. Inspect the interior and exterior of all metal parts that
will be reused for severe corrosion, pitting and cracks.
Superfi cial corrosion and/or pitting on the exterior
portion of the body(4) and cover(3) is acceptable.
Replace the entire valve if the interior of the body or
cover exhibit signs of corrosion or pitting.
4. Inspect each nonmetallic component for cracks, wear or
distortion. Replace the entire valve if these conditions
are found.
5. Inspect the bores of both the body(4) and cover(3) for
deep scuffi ng or gouges. Replace the entire valve if
either are found.
6. Make certain the air channel running between the top
surface of the body(1) and its supply port is clear and
free of obstruction.
7. Make certain all air channels and exhaust passages in
the valve cover(3) are clear and free of obstruction.
8. Inspect the pipe threads in the body(4) and valve
cover(3). Make certain they are clean and free of thread
sealant.