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8

DISASSEMBLY

BRAKE SHOES

Bendix brake shoes and linings are available as sets with
new factory lining installed. If the brake shoes are in good
condition, neither worn nor bent, new lining may be installed
on the old brake shoes. For lining installation procedures,
and brake shoe inspection procedures, refer to Bendix
publication; The Brake Block Manual Part 11, Form No.
BW-1257R.

WHEEL CYLINDER DISASSEMBLY

Before proceeding, clean the exterior of the wheel cylinder
and make sure the work area, tools, and hands are clean.
Place a clean sheet of paper on the work bench surface.

1. Clamp the wheel cylinder unit in a bench vise with padded

jaws.

FIGURE 17 - EXPANDER UNIT

FIGURE 16 - REMOVAL OF PIN FROM WEDGE

PIN

SPRING

FERRULE

PIN

SPRING & LOCATOR

HYDRAULIC SEALS

ROLLER TAPPET/

PISTON

INPUT TAPPET/

PISTON

HOUSING

TAPPET SEAL

STOP PIN

ABUTMENT TAPPET

GASKET

WEDGE ASSEMBLY

WEDGE SEAL- &

RETAINING RING

ASSEMBLY

CIRCLIP (SNAP RING)

FERRULE

DUST BOOT

WASHER

BLEED

SCREW

RETURN SPRING

DUST BOOT

Содержание A2LS

Страница 1: ...nch 44 5mm diameter bore depending upon vehicle brake requirements The units are hydraulically connected together with a bridge pipe or crossover tube The single web brake shoes are located by slots i...

Страница 2: ...ng contacts the drum the shoes are forced around sliding on the abutments in the direction Of drum rotation In the forward direction Figure 3 the torque load from one shoe is taken by the wheel cylind...

Страница 3: ...e Each wheel cylinder piston has an adjuster mechanism screwed into it Figure 6 The rotation of this adjuster relative to the piston adjusts the brake shoes according to the amount of lining wear The...

Страница 4: ...etrimental effect will result and no attempt should be made to standardize these clearances MANUAL OVERRIDE MECHANISM The manual override mechanism is used to override the automatic adjuster to set th...

Страница 5: ...m 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 th...

Страница 6: ...intenance manual 3 Un adjust the vehicle brake shoes as follows A Remove the rubber grommets from the manual override access holes marked ADJ in the backing plate dirtshield and insert a blunt screwdr...

Страница 7: ...one complete turn after fully un adjusting the pistons 10 Inspect the wheel cylinder unit and expander unit for leaks Lift the dust boots at their inner diameters from the tappets and pistons If flui...

Страница 8: ...LINDER DISASSEMBLY Before proceeding clean the exterior of the wheel cylinder and make sure the work area tools and hands are clean Place a clean sheet of paper on the work bench surface 1 Clamp the w...

Страница 9: ...pet piston from the housing in the direction of the input tappet piston Figure 17 Note Do not slide the roller tappet piston past the wedge turret 8 Remove the bleed screw 9 Using a small screwdriver...

Страница 10: ...grease or brake fluid REASSEMBLY ASSEMBLE EXPANDER UNIT Each Bendix drum brake repair kit contains a tube of synthetic based grease that is recommended for all internal expander parts abutment tappet...

Страница 11: ...d screw 10 Install the expander to the backing plate dirtshield using a new gasket Figure 1 and secure in place with fixing bolts 11 Refer to the vehicle service manual and stall the parking brake cha...

Страница 12: ...re for the other wheel cylinder 6 Install the wheel cylinder unit to the backing plate dirtshield using a new gasket Figure 1 and secure in place with fixing bolts Install the bridge pipe and hydrauli...

Страница 13: ...g 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...

Страница 14: ...4 Bleed system refer to vehicle service manual 5 Weak brake hoses 5 Refer to vehicle service manual 6 Drums out of round 6 Refinish or replace if wear exceeds limits 3 Hard pedal 1 Grease or brake fl...

Страница 15: ...everal times to dry linings 8 Sticking wheel cylinder piston 8 Replace or repair wheel cylinder 9 Faulty suspension parts 9 Refer to vehicle service manual 6 Noise and chatter 1 Bent damaged or incorr...

Страница 16: ...Defective wheel cylinder 3 Repair or replace wheel cylinder 4 Bent or distorted brake shoe 4 Replace brake shoes in axle sets 10 Parking brake will 1 Defective expander unit 1 Repair or replace expand...

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