Pontiac FIREBIRD 1972 Service Manual page 423

5-20 1972 PONTIAC SERVICE MANUAL
UNDERBODY
UNDERBODY
TO REAR AXLE
-.
REAR CABLE ASM.
FRAME
r
-
INSTRUMENT
(TYPICAL 2 CLIPS)
TYPICAL BOTH SIDES)
SIDE RAIL
VlMlB
(TYPICAL BOTH SIDES)
Fig. 5-18 F Series Parking Brake System
NOTE: I f drums are not scored deeper than
.OZO" or do not exceed maximum out-ofiround
tolerances (see Specifications), they should be
cross-sanded, rather than turned. Cross-sand-
ing of drums may be accomplished using a 90
degree offset l/4" or 3/8" dn7I adapter, with a
I" sanding disc (40 grit). The drums should
show a unifonn finish after cross-sanding. This
method of refinishing drums will allow the
proper drum surface necessary to burnish new
linings.
WARNING: REMOVING MATERIAL FROM
BRAKE DRUM REDUCES THE STRENGTH OF
THE DRUM AND ALSO ITS ABILITY TO DISSI-
PATE HEAT. NEVER REMOVE MORE THAN IS
ABSOLUTELY NECESSARY AND IN NO CASE
REMOVE MORE THAN 0.030" (INCREASING
DIAMETER BY 0.060"). IF IT SHOULD BE DETER-
MINED THAT IT IS NECESSARY TO TURN A
DRUM IN EXCESS OF ,030" (INCREASING
DIAMETER BY .060"), THE DRUM SHOULD BE
REPLACED.
The "Discard" dimension stamped on the drum includes
a wear factor of .030" above the maximum turning dimen-