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SD-03-4516

Bendix

SR-5

™

Trailer Spring Brake Valve

FIGURE 1 SR-5

™

TRAILER SPRING BRAKE VALVE

*SHOWN WITH OPTIONAL ANTI-COMPOUNDING COVER

SR-5

™

VALVE

IDENTIFICATION

HOLE

1/4” NPT TRAILER

SERVICE

1/4” NPT

TRAILER SUPPLY

EXHAUST

COVER*

1/4” NPT

SERVICE

RESERVOIR

(2)

3/8” NPT

DELIVERY (4)

1/2” OR 3/4” NPT

SPRING BRAKE

RESERVOIR

PRESSURE

PROTECTION

VALVE

DESCRIPTION

The 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 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.

1 2 3 4 5 6 7 8 9

Sommario

Pagina 1 - Trailer Spring Brake Valve

1®SD-03-4516Bendix® SR-5™ Trailer Spring Brake ValveFIGURE 1 SR-5™ TRAILER SPRING BRAKE VALVE*SHOWN WITH OPTIONAL ANTI-COMPOUNDING COVERSR-5™ VALVEIDE

Pagina 2

2FIGURE 2 TYPICAL SYSTEM SCHEMATICS WITH SR-5™ TRAILER SPRING BRAKE VALVETWO-TANK SYSTEMTRAILER SERVICESERVICE/SPRING BRAKERESERVOIRTRAILER SUPPLYSERV

Pagina 3 - OPERATION

3FIGURE 3 CHARGING BELOW 70 PSITRAILER SUPPLYSPRINGBRAKECHAMBERTRAILER SERVICE RES.CONTROL PISTONDELIVERYOPERATIONCHARGING BELOW 70 PSI (SEE FIGURE 3)

Pagina 4

4FIGURE 6 PARK RELEASE WITH TRAILER CHARGEDFIGURE 5 PARK APPLICATIONTRAILER SUPPLYSPRINGBRAKECHAMBERTRAILER SERVICE RES.CONTROL PISTONEXHAUSTPASSAGETR

Pagina 5

5Note that pressure protection valve C will open if trailer supplyair is greater than 70 psi. But check valves B and D will notopen unless release pre

Pagina 6 - PERSONAL INJURY OR DEATH:

6FIGURE 8 FAILED TRAILER RESERVOIRPRESSUREPROTECTIONVALVE CSPRINGBRAKECHAMBERTRAILER SERVICE RESERVOIREXHAUSTTRAILER SERVICECHECKVALVE BSERVICE/SPRING

Pagina 7 - INSTALLATION

78. Use only genuine Bendix® replacement parts,components and kits. Replacement hardware,tubing, hose, fittings, etc. must be of equivalentsize, type

Pagina 8 - FIGURE 9 - EXPLODED VIEW

8PIPE PLUGVALVE BODYPIPE PLUG119121017187682554213242316151920212218171413FIGURE 9 - EXPLODED VIEW

Pagina 9 - ASSEMBLY

9DISASSEMBLYThe following procedure is for reference only. Always havethe appropriate maintenance kit on hand, and use itsinstructions in lieu of thos

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BENDIX BW1680 Manuale Utente Pagina 1

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