Bendix Commercial Vehicle Systems TP-3DC TRACTOR PROTECTION VLV 6/07 User Manual
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FIGURE 9 - TP-3DC
™
VALVE EXPLODED VIEW
GUIDE
VALVE
SPRING
PLUNGER
COVER
1/4” HEX/TORX
SCREW
BODY
1
2
3
4
5
6
7
8
9
DISASSEMBLY
The following disassembly and assembly procedures
are for reference only. Always have the appropriate
maintenance kit on hand, and use its instructions in lieu
of those presented here. Refer to Figure 9 throughout the
procedures.
1. Remove the two 1/4" hex/torx head screws that secure
the cover to the body.
2. Remove and discard o-ring(1) from the cover.
3. Remove and discard diaphragm(2).
4. Remove the guide, and remove and discard o-rings
(3 & 4) from the guide.
5. Remove the valve spring from the plunger, then remove
the plunger.
6. Remove and discard o-ring(5) from the plunger.
7. Remove and discard collar(6) and o-ring(7) from the
plunger.
8. Remove and discard o-rings(8 & 9) from the plunger.
CLEANING AND INSPECTION
1. Clean all metal parts in mineral spirits and dry them
completely.
2. Inspect all parts for excessive wear or deterioration.
Inspect valve seats for nicks or burrs. Check the valve
spring for cracks or corrosion.
3. Inspect the bores of the valve housing for deep scuffi ng
or gouges.
Replace all parts that were discarded and any parts not
found to be serviceable during inspection, using only
genuine Bendix replacement parts.
ASSEMBLY
Before assembling the TP-3DC
™
valve, lubricate all o-rings,
o-ring grooves, body bores and rubbing surfaces with
Bendix silicone lubricant (Pc. No. 291126) or equivalent.
NOTE: When using pipe thread sealant during assembly
and installation, take particular care to prevent the
sealant from entering the valve itself. Apply the
sealant beginning with the second thread back
from the end.
1. Install o-rings(8 & 9) onto plunger.
2. Install o-ring(7) onto plunger and then install collar(6)
over o-ring(7). Make sure the collar is fully seated and
fi rmly in place.
3. Install the plunger in the body. Then install the valve
spring into the plunger.
4. Install o-rings(3 & 4) onto the guide.
5. Properly align the guide by orienting its indexing tab
with the corresponding notch in the body, then install
the guide in the body.
6. Place diaphragm(2) onto the guide.
7. Install o-ring(1) onto the cover.
8. Firmly press the guide against spring pressure and
install the cover on the body. Secure with the two hex/
torx head screws. Torque to 30 - 60 in. lbs.
NOTE: BEFORE PLACING THE VEHICLE BACK INTO
SERVICE, PERFORM OPERATIONAL AND
LEAKAGE TESTS.