BENDIX ST-1 ST-3 SAFETY VALVE Handmatig - Pagina 2

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DISASSEMBLY: ST-1

1. Clamp lower wrench flat in vise (flat nearest pipe thread).

2. Using upper wrench flat, unscrew lock nut. Unscrew and

remove spring cage from body of valve.

3. Remove ball valve, spring and release pin from spring

cage.

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DISASSEMBLY: ST-3

1. Clamp spring cage in soft jawed vise.

2. Using wrench flat, unscrew body from spring cage.

3. Remove ball valve, spring and release pin from spring

cage.

CLEANING AND INSPECTION

Clean all parts in mineral spirits. Inspect all parts. All parts

not considered serviceable should be replaced with genuine

Bendix replacement parts.

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ASSEMBLY: ST-1

ADJUSTABLE VALVE

1. Place the ball valve in body.

2. Install spring and release pin in spring cage with adjusting

screw.

3. Position the release pin overball valve. Screw body with

ball into the spring cage. Tighten securely.

4. Adjust for proper setting (see "Adjustment" section).

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ASSEMBLY: ST-3

NON-ADJUSTABLE VALVE

1. Install spring, release pin in spring cage.

2. Position ball valve in body and screw spring cage onto

body.

3. Hold spring cage in soft jawed vise and tighten body

securely.

TO RAISE PRESSURE SETTING

1. Loosen lock nut.

2. Turn adjusting nut clockwise to obtain correct pressure

setting.

3. Tighten lock nut.

TO LOWER PRESSURE SETTING

1. Loosen lock nut.

2. Turn adjusting nut counter clockwise to obtain correct

pressure setting.

3. Tighten lock nut.

TESTING OF REBUILT SAFETY VALVES:

Perform operating and leakage checks.

ADJUSTMENT OF SAFETY VALVE

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NOTE: The ST-3

safety valve is not adjustable.

The pressure setting of the safety valve is stamped on the

cover wrench flat (closest to the pipe thread). The vehicle

manual may also provide the proper pressure setting. If

setting is not known, determine governor cutout pressure

setting and adjust safety valve so that the safety valve closes

at a pressure setting somewhat above governor cutout

pressure setting (See "Operation" section).

ADJUSTABLE VALVE

NON-ADJUSTABLE VALVE

ADJUSTING

NUT

SPRING

CAGE

BALL

VALVE

PIPE

THREAD

SPRING

CAGE

BODY

PIPE

THREAD

To adjust, the safety valve must be connected to an air

system with air pressure in excess of desired setting. It is

important that an accurate gauge be used to check pressure

settings while making adjustments.

WARNING! PLEASE READ AND FOLLOW

THESE

INSTRUCTIONS

PERSONAL INJURY OR DEATH:

When working on or around a vehicle, the following

general precautions should be observed at all times.

1. Park the vehicle on a level surface, apply the park-

ing brakes, and always block the wheels. Always

wear safety glasses.

2. Stop the engine and remove ignition key when

working under or around the vehicle. When work-

ing 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 electri-

cally charged components.

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

assemble a component until you have read and

thoroughly understand the recommended proce-

dures. Use only the proper tools and observe all

precautions pertaining to use of those tools.

RELEASE

LOCK

NUT

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ST-1

SAFETY

SPRING

VALVE

BODY

RELEASE

SPRING

BALL

VALVE

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ST-3

SAFETY

VALVE

AVOID