BENDIX TP-3DC TRACTOR PROTECTION VALVE Manual - Page 7

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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

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.

™

valve, lubricate all o-rings,

PLUNGER

BODY

FIGURE 9 - TP-3DC

™

VALVE EXPLODED VIEW

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.

1/4" HEX/TORX

SCREW

COVER

GUIDE

VALVE

SPRING