BRAKE INSTRUCTIONS
DESCRIPTION-THE GIRLING DISC BRAKE
Front Disc Diameter II
-tV.
Rear Disc Diameter
Wi".
The Girling Disc Brake is of simple construction consisting basically
of
a
disc made from high quality cast iron and a cast iron caliper mounted
on a support bracket.
The disc, which is attached to and rotates with the hub, is straddled
by the caliper, held by two studs on the stub axle flange. On each side of
the caliper the cylinders contain a rubber sealing ring positioned in a
groove in the body and a piston protected by a dust cover. Inserted
between the piston and the disc is the segmental lining pad bonded to a
steel plate which is held in the body by retaining pins or plates.
Upon application of the brake pedal the hydraulic pressure generated
in the system causes the co-axially aligned pistons to apply equal and
opposite pressure by the friction pads on the rotating discin direct propor-
tion to the foot effortapplied to the pedal.
When the pressure is released and the compression on the disc
relieved, the pads and the pistons remain in a relaxed position with the pad
just touching the disc ready for the next application. In this manner
adjustment for lining wear is automatic and no manual adjustment is
required.
The present disc brake has friction segments whichoperate on a small
area of the braking surface leaving a large proportion of the disc exposed
to the atmosphere, allowing maximum dissipation of heat.
Girling disc brakes fitted to the Cobra are self compensating and
require no adjustment whatsoever. The hand brake from chassis
CSX2I88 is self adjusting and requires little attention.
RUNNING ADJUSTMENTS
CYLINDER MAINTENANCE
In order to replace the rubber rings or seals, it isnecessary to remove
the caliper assembly from the vehicle. The brake segments should be
removed in the manner described and instead of pushing the pistons to the
bottom of the bore withdraw them fro.n the caliper body taking care not (
to damage the surfaces. The sealing rings may then be removed by
inserting a blunt tool under the seals and prising out, taking care not to
damage the locating
-grooves,
Examine the bores and pistons carefully
for any signs of abrasion or "scuffing".
It is important that in cleaning the components no petrol, paraffin,
trichlorethylene or mineral fluid of any kind should be used. Clean with
methylated spirits, allow to vaporize leaving the components clean and
dry.
After cleaning and examining, lubricate the working surfaces of the
bores and pistons with clean genuine Castrol Girling Brake and Clutch
Fluid Crimson.
28
To Next Page
Loading...