Buick LeSabre 1965 Service Manual page 555

BRAKES
POWER BRAKES 9 - 3 3
a. Master Cylinder Group - see Section 9-C
b. Power Piston Group
PART
Power Piston & support plate
& Reaction Retainer.
Reaction Levers or Plates
Floating Control Valve.
Air Valve-Push Rod Assembly.
INSPECT FOR
Cracks, distortion, chipping,
damaged lever seats, pitted or
rough holes.
Worn seal surfaces (tubes).
Rough or uneven floating valve
seat.
Open passages and flow holes.
Cracks, deformation, t e a r s ,
and heavy wear.
Deterioration of r u b b e r or
warped valve face.
Air valve: scratches, dents,
distortion, or corrosion of I.Dt
or O.D. All seats to be smooth
and free of nicks and dents.
Push rod must move freely in
air valve, but must not pull out.
CORRECTIVE ACTION
Cleanup or replace.
Replace.
Clean.
Replace.
Replace.
Do not repair; replace.
If worn, replace air valve-
push rod assembly.
c. Over-All Unit
PART
Front & Rear Half Housing.
Air Filters & Silencer
INSPECT FOR
Scratches, scores, pits, dents
or o t h e r damage affecting
rolling or sealing of diaphragm
or other seals.
Cracks, damage at ears, dam-
aged threads on studs.
Bent or nicked locking lugs.
Loose studs.
Dirty.
CORRECTIVE ACTION
R e p l a c e u n l e s s e a s i l y
repaired.
R e p l a c e u n l e s s e a s i l y
repaired.
R e p l a c e u n l e s s e a s i l y
repaired.
Replace or repair.
Replace.