BENDIX A2LS Руководство - Страница 13

Просмотреть онлайн или скачать pdf Руководство для Автомобильные запчасти BENDIX A2LS. BENDIX A2LS 17 страниц. Hydraulic drum brakes w/parking

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RED - Park brake expander end on both LH and RH brakes.

GREEN - Wheel cylinder end on LH brakes.

YELLOW - Wheel cylinder end on RH brakes.

2. Remove the elastic bands from around the wheel cylinder

used to retain the pistons for assembly.

3. Push the abutment ends of the brake shoes into the

slots on the piston and tappets.

4. Attach the swan neck end, end opposite the loop in the

spring, of each return spring to the brake shoe web as

shown in Figure 25. Using the tool, Figure 13, hook the

other end of the return spring into the shoe web.

5. Install the brake drums.

6. Repeat with opposite wheel.

7. Ensure that the wedge stem is centralized.

8. Fit spring brake chambers to brakes per vehicle service

manual.

9. If new wheel cylinders or expander units were installed,

or the brake system drained, refer to the vehicle service

manual and bleed the brake system.

BRAKE SHOE ADJUSTMENT

1. Manually adjust both wheel cylinders through the

adjusting holes, Figure 10, until the shoe to drum

clearance is less than .76 mm (.030"). Check the shoe

to drum clearance by using a feeler gauge through the

lining inspection holes, Figure 26.

2. Apply the foot brake pedal to centralize the brake shoes

and release. Recheck the shoe to drum clearance; if

not 0.51 to 0.76 mm (0.020" to 0.030") manually adjust

the wheel cylinder until those dimensions are reached.

3. Replace all rubber grommets previously removed from

the backing plate (dirtshield).

Note: Due to manufacturing tolerances, it is unlikely that all

shoes on an axle will run at the same drum clearances.

No detrimental effects will result from this condition,

and no attempt should be made to standardize the

clearance.

4. Correct and full adjustment will only occur with the drum

rotating; i.e., with the vehicle moving. Pumping the brake

pedal with the vehicle stationary will not achieve proper

adjustment.

5. Refit road wheels.

IMPORTANT: Run engine and release park brake. Wind

the park brake chamber spring release bolts in place

until they bottom firmly in the unit. They should be

torqued

the

recommendations.

vehicle

manufacturer's

6. Rotate each wheel to insure that the hydraulic system

has fully released parking brakes.

7. Apply parking brake and check that the wheels cannot

be rotated by hand.

8. Jack down vehicle. Run engine and release parking

brakes. Drive vehicle slowly and check service and

parking brakes, finally road test.

FINAL CHECK

IMPORTANT! PLEASE READ:

Before test driving any vehicle, first check the hydraulic

fluid level in the master cylinder.

1. Check the hydraulic fluid level of the brake master

cylinder. If the fluid level is more than 1/4 inch (6,35 mm)

from the top of the reservoirs, fill the reservoirs with DOT

4 heavy duty hydraulic brake fluid.

2. Depress the brake pedal several times to seat the brake

shoes against the drums. Recheck the fluid level of the

master cylinder reservoirs.

3. Check the brake pedal travel by pushing the brake pedal

as far down as possible. If the brake pedal free play

exceeds recommended dimensions, or brake warning

light is lit, refer to the vehicle service manual.

4. With the vehicle on a level surface in a parking or service

area, start the engine and apply the parking brake; test

for operation.

5. With the vehicle moving at slow speed, make a series of

light snubs and follow with a series of normal service

stops before making a panic stop. Make sure the service

brakes stop the vehicle in an even and straight line,

without any pulling to either side.

6. Accelerate the vehicle to a speed of 20 mph (32 km/h)

then apply the service brakes. A 30 ft. (92,4 m) stop with

the service brake from 20 mph (32 km/h) is recognized

as being satisfactory.