BENDIX A2LS Handmatig - Pagina 12

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GREEN ON LH

BRAKE YELLOW

ON RH BRAKE

FIGURE 24 - POSITION OF BRAKE SHOE RETURN SPRINGS

2. Lubricate the adjuster shaft with DOT 4 brake fluid and

screw the adjuster shaft fully into the piston assembly,

then unscrew one full turn, Figure 22.

3. Install the spring and locator assembly into the adjuster

shaft assembly. Lubricate the piston assembly with new

DOT 4 brake fluid and install the piston assembly into

the cylinder housing. Fit the dust boot onto the housing.

4. Install a new retainer into the override wheel and install

the override wheel and tappet head onto the piston. On

™

old style A2LS

drum brakes, the override wheel had an

internal retainer ring which also locates in a groove in

the neck of the piston, Figure 23. The latest override

wheel still uses the retainer ring but it is positioned further

up the override wheel. The groove in the piston neck has

been deleted.

FIGURE 25 - USING TOOL TO ATTACH SPRING

Note: A new design piston may be used to replace the piston

LEFT HAND

BRAKE ASSEMBLY

RED ON LH &

RH BRAKES

IMPORTANT: Do not turn the manual override wheel.

5. Repeat the above procedure for the other wheel cylinder.

6. Install the wheel cylinder unit to the backing plate

7. Install the brake shoes following procedures under Brake

BRAKE SHOE INSTALLATION

High temperature grease should be used on those external

parts that require lubrication (slots on the pistons and

tappets, and on the steady posts).

Always install new brake shoes in axle sets. When installing

new brake shoes also install new shoe return springs.

1. Lightly smear the abutment ends of the brake shoes

Note: The color of the spring identifies its position in the

INSPECTION

SPRING TOOL

(REFER

FIGURE 13)

BRAKE LINING

FIGURE 26 - BRAKE SHOE INSPECTION HOLE

in older style brakes but the override wheel must also

be changed. Although it would be permissible to fit an

old style piston into a new style brake, it would be a

retro-grade step and is not recommended. Ensure that

the tappet head assemblies are located securely on

the piston necks.

(dirtshield) using a new gasket, Figure 1, and secure in

place with fixing bolts. Install the bridge pipe and

hydraulic brake hose.

Shoe Installation in this manual. Refer to the vehicle

service manual for procedures to bleed the air from the

brake system. After bleeding, manually readjust the

brake shoe to drum clearance as necessary. Refer to

Brake Shoe Adjustment in this manual.

and steady posts with high temperature grease. Keep

the grease away from all hydraulic components and

the shoe linings. Refer to Figure 24 for correct position

of the replacement brake shoes and shoe return springs.

brake assembly.

LINING

HOLE