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Bendix SR5 Spring Brake Valve
The Bendix® SR‑5™ valve is a reservoir‑mounted trailer valve that can control up to four spring brake actuators during parking or emergency applications. It has the following capabilities:
• Automatically applies trailer spring brakes in the event
of a breakaway or trailer supply line failure.
• Protects trailer reservoir(s) air pressure in the event of
a breakaway or trailer supply line failure.
• Allows no automatic trailer spring brake application with
air pressure loss in trailer reservoir(s).
• Allows the trailer spring brakes to be applied and released
repeatedly with a failed trailer reservoir(s):
• Optional anti‑compounding prevents an overriding
service brake signal while the trailer supply line is at
atmospheric pressure.
• Does not allow service system charging if a failure occurs
in the parking brake circuit.
Ports
1 ‑ 1/2" or 3/4" NPT Spring Brake Reservoir Mounting
(SPR BK RES)
1 ‑ 1/4"‑18 NPT Trailer Supply (TRL SUP)
1 ‑ 1/4"‑18 NPT Trailer Service (TRL SER)
4 ‑ 3/8"‑18 NPT Delivery (DEL)
2 ‑ 1/4"‑18 Service Reservoir (SERV RES)
1 ‑ Exhaust (EXH)
The SR‑5 valve appears very similar to the Bendix® SR‑2™ valve. Both valves consist of a die‑cast aluminum body and cover, pressure protection valve, and reservoir‑mounting nipple. However, Figure 1 notes the distinguishing characteristic of the SR‑5 valve–a hole drilled into the flat surface between the pressure protection valve and the body.
Cross Reference:
Midwest WA65437, Automann 170.065437, Keene K065437, BWP M-65437, Bendix 65437, Bendix 065437, K033086, 109615, Euclid E-BN065437N, Dayton AV065437, Newstar S-A142. Replaced By Bendix K033221 For New, Bendix 109615 For Reman
| Spring Brake Reservoir Supply Port: | 3/4-14 NPT (with Check Valve) |
| Thread Sealant: | No Sealant |
| Trailer Supply Port: | 1/4-18 NPT |
| Trailer Service Port: | 1/4-18 NPT |
| Service Reservoir Port 1: | 1/4-18 NPT |
| Service Reservoir Port 2: | 1/4-18 NPT |
| Delivery Port 1: | 3/8-18 NPT |
| Delivery Port 2: | 3/8-18 NPT |
| Delivery Port 3: | 3/8-18 NPT |
| Delivery Port 4: | 3/8-18 NPT |
| Exhaust Port: | Dust Shield |
| Brake Charging Priority: | Spring Brake Priority |
| Closing Pressure: | 70 PSI |
| Anti-Compounding: | Yes |
| Regulatory Compliance: | FMVSS 121 |
| Maximum Operating Temp: | 93 °C |
| Minimum Operating Temp: | -40 °C |