Manual de instrucciones BENDIX TP-5 TRACTOR PROTECTION VALVE

[. . . ] Should the TP-5TM valve not meet the elements of the operational tests noted in this document, further investigation and service of the valve may be required. A maintenance kit is available under part number 289061. DOUBLE CHECK VALVES The two double check valves in the TP-5TM valve as seen in schematic view Figure 2 serve to pick up the highest pressure service signal from either the tractor front brake circuit, rear brake circuit or TC valve signal, operating the trailer brakes accordingly. The stop light switch port also picks up this signal and actuates the stop light switch. SERVICE LINE QUICK RELEASE VALVE The trailer service line port is located in the cover, pc. This cover also houses a quick release valve. [. . . ] Disconnect the trailer service line hose coupling. Make a trailer hand control valve application. Cover the 1/16 inch vent hole in the service line shut-off valve area of the TP-5TM valve casting. Check for leakage at hose coupling and at exhaust port at the TP-5TM valve. Excessive leakage at either port indicates a faulty inlet valve, item 2 on Figure 4. With hand control valve still applied, turn on ignition and check for stop light function. Release hand control valve application and place tractor protection valve in normal position. Connect the tractor service hose coupling to a test gauge, re-apply the hand control valve and note that there is pressure at the service hose coupling. Check for leakage at the service line QRV. Excessive leakage would indicate a defective diaphragm item 1 Figure 3. With service line pressure still applied through the hand control valve check for leakage at the brake valve exhaust. Excessive leakage indicates a defective double check valve shuttle. Check for leakage at the 1/16 inch vent hole. Leakage indicates either o-ring item no. (The o-ring (5) referred to is obviously the one on the service line shut-off piston (19), although the same o-ring is used on cap nut (10). ) 9. Release the hand control valve application and re-check for leakage at the vent hole. If the leakage continues it is the large o-ring item no. If the leakage stops it was the smaller o-ring item no. Check for leakage at exhaust of hand control valve. Excessive leakage indicates a faulty double check valve shuttle. Release foot brake application, disconnect line from primary service brake circuit at TP-5TM valve delivery port (PCD) and block off the end of the line from the brake valve. Make a foot brake application and observe for leakage at the PCD delivery port. [. . . ] Re-install inlet valve (2) (Figure 4), spring (16) and lock ring (15) in body. Install shuttle guides (14) and shuttles (9) and their respective cap nuts (10) and (11). Install the o-rings (5) and (6) on the service line shut off plunger (19), and install spring (20), plunger and corresponding cap nut (12) with o-ring (7). Position the quick release valve diaphragm in the body (18) and the o-rings (3) and (4) on the cover and install the cover in its cavity in the body (see Figure 3). [. . . ]