User manual BENDIX TP-3 TRACTOR PROTECTION VALVE

[. . . ] A warranty may be voided if intrusive maintenance is performed during the warranty period. SD-03-3652 1 PP-3TM CONTROL VALVE TC-2TM CONTROL VALVE DOUBLE CHECK TP-3 TRACTOR PROTECTION VALVE TM TRAILER EMERGENCY LINE TRAILER SERVICE LINE BRAKE VALVE COMPRESSOR NO. 2 RESERVOIR FIGURE 2 No two vehicles operate under identical conditions; as a result, maintenance intervals may vary. Experience is a valuable guide in determining the best maintenance interval for air brake system components. At a minimum, the TP-3TM valve should be inspected every 6 months or 1500 operating hours, whichever comes first, for proper operation. [. . . ] Remove date code ring while still holding diaphragm seat in body. Allow seat to rise until valve spring (6) force is no longer present. Remove diaphragm seat assembly, valve spring and plunger assembly. Remove diaphragm seat o-ring (7), Phillips screw (3), washer (8) and diaphragm (9). Remove valve retainer ring (14), valve retainer (10), inlet valve (4), and o-rings (12) and (13) from plunger. 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. EARLY REVISION-OPENING PRESSURE 80 PSI 1. Position preload spring (2) then exhaust diaphragm (5) over stud boss in the diaphragm seat (9). Place washer (8) with lip out on exhaust diaphragm, install and tighten cap screw (3). Install snap-on valve (4) on plunger (13), position and force valve retainer (10) down over valve. Install two (2) plunger o-rings (12) and (13) in their proper grooves. Position valve spring (6) on diaphragm seat (9). Force plunger (3) down into check valve seat until prong of preload spring snaps into inner cut in plunger and holds insert assembly together. Position insert seal ring (3) on seat then place complete insert in TP-3TM valve body. Using Truarc pliers, install insert retainer ring (1) in TP-3TM valve body. Make sure that ring snaps fully into its groove in the valve body. LATE REVISION-OPENING PRESSURE 45 PSI 1. Position and force valve retainer (10) down over inlet valve. Install retainer ring (14) beneath the inlet valve retainer. Install both plunger o-ring (12) and (13) in the proper grooves. Place plunger and valve assembly in valve body. Install Phillips head screw (3), diaphragm washer (8) (cup side up) and diaphragm (5) into diaphragm seat. Place inlet valve (6) spring into plunger. [. . . ] 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. Use only genuine Bendix ® replacement parts, components and kits. Replacement hardware, tubing, hose, fittings, etc. [. . . ]