BENDIX SS-1 SHUT OFF VALVE Manual - Page 3

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mode. When using the SS-1

manner, the control signal ramp rate should be limited

by oriﬁ cing or other methods. Please contact Bendix

Engineering with speciﬁ c application requirements.

PREVENTIVE MAINTENANCE

Important: Review the Bendix

performing any intrusive maintenance procedures.

The warranty may be voided if intrusive maintenance

is performed during the warranty period.

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 SS-1

valve should be inspected every 6 months or

1500 operating hours, whichever comes ﬁ rst, for proper

operation.

™

Should the SS-1

valve not meet the elements of

the operational tests noted in this document, further

investigation and service of the system or valve may be

required.

If the SS-1

™

valve fails to function as described or leakage

is excessive, it should be replaced with a genuine Bendix

service unit of the same part number, available at Bendix

authorized parts outlets.

WARNING!

PLEASE READ AND FOLLOW THESE INSTRUCTIONS

TO AVOID PERSONAL INJURY OR DEATH:

When working on or around a vehicle, the following general

precautions should be observed at all times. Always wear

safety glasses.

1. Park the vehicle on a level surface, apply the parking

brakes, and always block the wheels.

2. Stop the engine and remove ignition key when working

under or around the vehicle. When working in the engine

compartment, the engine should be shut off and the

ignition key should be removed. Where circumstances

require that the engine be in operation, EXTREME

CAUTION should be used to prevent personal injury

resulting from contact with moving, rotating, leaking,

heated or electrically charged components.

3. Do not attempt to install, remove, disassemble or

assemble a component until you have read and

thoroughly understand the recommended procedures.

Use only the proper tools and observe all precautions

pertaining to use of those tools.

4. If the work is being performed on the vehicle's air brake

system, or any auxiliary pressurized air systems, make

certain to drain the air pressure from all reservoirs

before beginning ANY work on the vehicle. If the

vehicle is equipped with an AD-lS

™

shut-off valve in this

Warranty Policy before

air dryer system or

a dryer reservoir module, be sure to drain the purge

reservoir.

5. Following the vehicle manufacturer's recommended

procedures, deactivate the electrical system in a

manner that safely removes all electrical power from

the vehicle.

6. Never exceed manufacturer 's recommended

pressures.

7. 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.

8. Use only genuine Bendix

components and kits. Replacement hardware, tubing,

hose, ﬁ ttings, etc. must be of equivalent size, type

and strength as original equipment and be designed

speciﬁ cally for such applications and systems.

9. Components with stripped threads or damaged parts

should be replaced rather than repaired. Do not

attempt repairs requiring machining or welding unless

speciﬁ cally stated and approved by the vehicle and

component manufacturer.

10. Prior to returning the vehicle to service, make certain all

components and systems are restored to their proper

operating condition.

11. For vehicles with Antilock Traction Control (ATC),

the ATC function must be disabled (ATC indicator

lamp should be ON) prior to performing any vehicle

maintenance where one or more wheels on a drive

axle are lifted off the ground and moving.

OPERATING AND LEAKAGE TESTS

OPERATING TESTS

General

Two accurate air gauges are necessary to perform these

tests. Depending upon installation, it may be necessary to

remove the valve to properly test it. When testing valves

installed in an automatic application the correct opening

pressures of the valve should be known before beginning

tests; consult vehicle manual. Refer to ﬁ gure 3 and use the

appropriate Operational test.

Pilot

1. Install an accurate gauge in the supply line and the

other gauge in the delivery line.

2. With full system pressure present at the supply port of

™

the SS-1

valve, apply and release full system pressure

to the control port and note that delivery pressure

increases to supply port pressure with no perceptible

lag.

replacement parts,