BENDIX AH-1B Manual - Página 4

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TECHNICAL SPECIFICATIONS

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AH-1B

Air Hydraulic Intensifier Assembly

Power ratio - 20.2 to 1

Weight - approximately 2-1/2 pounds

Air Actuator

Effective area of diaphragm at 2-1/8 inches of push rod stroke

- approximately 28 sq.in.

Volume at 2-1/8 inches of push rod stroke - approximately

75 cubic inches.

Master Cylinder

Bore diameter - 1.38 inches

Maximum piston stroke - 2-1/8 inches

Maximum fluid displacement - 3.17 cubic inches

Fluid Reservoir

Volume - 33.5 cubic inch to "MAXIMUM" level mark with

cap removed.

PREVENTIVE MAINTENANCE

Every month, after 8,000 miles, or 300 operating hours;

1. Remove accumulated dirt and grime from the area

around the reservoir cover. With the ignition switch in

the on position, remove the cover and hold in an upright

position and allow brake fluid in the tube of the cap to

drain back into the reservoir. Check to see if the low

fluid indicator bulb is operating (in cab of vehicle).

2. If the fluid level is low, fill to proper level indicated on the

side of the reservoir. CAUTION: Fill the reservoir with

type and grade of fluid recommended by the vehicle

manufacturer.

3. Check tightness of the mounting nuts, air and hydraulic

fittings.

4. Make a visual inspection of air and hydraulic lines for

kinking, bending or fraying. Replace as necessary.

Every 12 months; 100,000 miles; or 3,600 operating hours;

1. Perform the operating and leakage tests. Replace or

repair components or assemblies as indicated using

only genuine Bendix parts.

OPERATING AND LEAKAGE TESTS

1. With vehicle air system pressure built to governor cut-out,

make and hold a full brake application. Hold for at least

5 minutes. Using a soap solution, check for air leaks at

fittings and air lines. Tighten and/or replace as necessary.

Apply a soap solution around the actuator clamp ring.

No leakage is permitted. Tighten or replace as necessary.

Apply a soap solution to the actuator non-pressure plate

drain holes. Replace the actuator diaphragm if leakage

is detected.

2. While holding the brake valve in the fully applied position,

check for hydraulic fluid leaks at all fitting connections

and at the hydraulic cylinders in the foundation brake.

Check for fluid leakage at the drain holes of the actuator

non-pressure plate. Repair or replace components as

necessary.

3. With the reservoir filter cap removed apply and fully

release the brakes several times while observing the fluid

in the reservoir. CAUTION: WEAR SAFETY GLASSES

AS FLUID MAY EXIT THE RESERVOIR.

A slight fluid turbulence should be noted at the beginning

of the application and should immediately cease. If

prolonged turbulence is noted, the master cylinder must

be repaired or replaced.

WARNING! PLEASE READ AND FOLLOW

THESE

INSTRUCTIONS

PERSONAL INJURY OR DEATH:

When working on or around brake systems and

components, the following precautions should be

observed at all times:

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

parking brakes, and always block the wheels.

When working around or under the vehicle, stop

the engine and remove the key from the ignition.

Always keep hands away from chambers as they

may apply as system pressure drops. Always wear

safety glasses.

2. 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 the use of those tools.

4. Following

the

recommended procedures, deactivate the electrical

system in a manner that safely removes all

electrical power from the vehicle.

5. If the vehicle is equipped with an air over hydraulic

brake system or any auxiliary pressurized air

system, 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-IS

air dryer system or a dryer reservoir module, be

sure to drain the purge reservoir.

6. Never connect or disconnect a hose or line

containing pressure; it may whip. Never remove a

component or pipe plug unless you are certain all

system pressure has been depleted.

7. Never exceed manufacturer's recommended

pressure.

AVOID

vehicle

manufacturer's

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