Page 54 - Vauxhall 20-60 H.P. (R Type) Chassis Shop Manual

VAUXHALL 20-60 SHOP MANUAL

BRAKE SHOES — TO REMOVE

SECTION – Remove front hubs ( Section 59 ), also circular cover plates attached to
265 the dust shields. The bolt holding each floating shoe in position can now
be removed and the shoes taken away.

TO RELINE

SECTION – Remove the old liners and reline in the ordinary way, keeping the whole
266 of the liner in contact with the shoe while riveting. It is advisable to

chamfer the ends of the liners after fitting, to prevent them picking up.

TO REPLACE

SECTION Reverse the operations given for removal ( Section 265 ) .
267 Each brake shoe clamping bolt must be tightened so that the shoe can just

be turned on the bolt by hand.

Before replacing the hub and brake drum assembly, slacken off the brake
adjustment to allow the shoes to clear the drum. Finally, readjust the four
wheel brakes as detailed in ( Section 263 ).

BRAKE SHOE CARRIERS —

TO REMOVE AND REPLACE

SECTION See ( Section 66 and 70 ) respectively.
268
REAR BRAKES

( See Figure 12 )

SECTION Description — The rear brake shoes are retained against the knife edges
269 of the fulcrum bracket by the pull off spring ‘E’ which also retains the
operating lever ‘I’ and thrust pin ‘H’ in position.

Adjustment is provided by means of a hand wheel located on the differential
side of the brake drum, which has the effect of turning through a worm
gear an adjustable thrust piece. Thus the position of the brake shoes can be
adjusted as the liners wear.
The shoes are centralised in relation to the drum by means of a compression
spring fitted through a hole in the rear shoe and operating between the
faces of the shoe guide. The operation of this spring is similar to that used
in the front brakes—the return travel of the rear shoe being limited to the
clearance given between the diameter of the spring and that of the hole
in the shoe.

On cars bearing chassis number R 2551 and onwards a flat spring ‘J’ steadies
the whole assembly when the brake shoes are in the off position, while on
cars bearing chassis number prior to 14 2551 a coil spring ( Fig. 11 ) fitted to
the thrust pin serves a similar purpose.
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