Description
279000-G - TP-3 TRACTOR PROTECTION VALVE - 4 PORT
PART NUMBER(S):
Fleet Products: 279000-G | Replaces OE: Bendix: 279000, 280830, 280932, 288055, 801512, | Automann: 170.279000 | Haldex: KN34060 | Navistar: 288906C91, 776407C91 | Mack: 20QE377 | Volvo: 79201-0001, 79201-3401 | Freightliner: 524220 | Meritor: R955279000N, RKN34060 | Velvac: 034068 | PAI: EM35910
DESCRIPTION:
Model: Bendix TP-3 Tractor Protection Valve
Vehicles: Heavy-duty tractors using compatible two-line tractor-trailer air brake systems
• Valve Type: Two-line tractor protection valve
• Tractor Service Port: One 3/8" NPT
• Tractor Emergency Port: One 1/4" NPT
• Trailer Service Port: One 1/2" NPT
• Trailer Emergency Port: One 1/2" NPT
• Opening Pressure: 45-60 PSI
• Closing Pressure: 20-45 PSI
• Actuation: Pneumatic, spring and diaphragm operated
• Mounting: Rear-cab two-hole flange mount
• Function: Isolates tractor air after trailer line failure
• System Use: Compatible dash-controlled trailer air circuits, protect the tractor air system if a trailer service or emergency line fails, separates, or develops a major leak. The valve closes the trailer air connections while preserving tractor reservoir pressure for continued braking control.
CROSS-REFERENCE(S):
KN34060N, KN34060X, 08600, 110747, 110748, 12354, 170.KN27900, 20-QE-2101, 20-QE-377, 20QE39303, 213-910-R, 288-906-C, 300479EE, 30905, 320052, 39300586, 401223, 46806, 5396-KN27900, 80-1001, A279000, AC67930, N4304, N4304AD, N4304AE, N4304AG, N4304AK, N4304BA, PL-279000, RB-279000, S-8932, S8666, TPV3, 11669272, 14030, 14444, 1484601210, 3507144, 35910, 401025, 401228, 4820-00-436-3033, 53100511, 56929AX, 776-407-C, 776407C, 932060, B8887GRP, BW280830, BW801512, BX279000, BX279000N, BX280830, BX801512, BXW279000, FC279000, FLTBV000, S-8887, S8887, TR279000, TV279000, WM57, BH279000
A cross-reference listing means this part may be a suitable replacement for the listed part numbers. Always verify fitment before installation.
IMPORTANT INSTALLATION NOTES:
✔ Confirm the 3/8" tractor service, 1/4" tractor emergency, and two 1/2" trailer connections.
✔ Mount securely at the rear of the cab using the two-hole flange.
✔ Route the service and emergency lines according to the tractor air brake schematic.
✔ Apply air-system-compatible sealant without allowing sealant inside the valve.
✔ Test trailer line isolation, opening pressure, closing pressure, and leak-free operation.
Warranty Information
