Chevrolet 10 series 1973, Руководство по капитальному ремонту

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5 -4 BRAKES
5. Remove the power piston seal from the rear
housing.
Power Piston Group (Fig. 6A)
CAUTION:
Care should be used in handling
the diaphragm o f the power piston assembly.
The diaphragm should be protected from
grease, oil, foreign matter and from nicks,
scratches and gouges.
1. Remove the air filter from the neck of the power
piston.
2. Remove the lock ring from the power piston by
prying one of the ends out from under the large
divided locking lug, and then pull it out from under
the remaining two small lugs.
3. Remove the reaction retainer, piston rod, reaction
plate, three reaction levers, air valve spring(s), small
reaction bumper, and air valve spring retainer.
4. Place square shank of Tool J-21524 in a vise and
position the assembly down on the tool so that the
three lugs on the tool fit into the three notches in
the power piston.
5. Pull the diaphragm edges away from the support
1 2 3 4 5 6 7
8 9 10 11 12 13 14 15 16 17 18
1. Air Filter
10.
Air Valve Sp rin g
2. L im ite r Washer
Retainer
(Except Chevelle) 11. Reaction Bum per
3.
Floating Control
12.
A ir Valve Spring(s)
Valve C up
13. Reaction Levers
4.
Floating Control
14. Reaction Plate
Valve A sse m b ly
15.
Reaction Retainer
5. " 0 " R ing
16. " 0 " R ing
6.
D iap h ragm
17.
M a ste r C y lin d e r
7.
Su p p o rt Plate
Piston Rod
8.
Pow er Piston
18.
Master
Ring
9. S n a p Ring
plate and grip the steel support plate by hand, press
down and rotate counterclockwise to separate the
plate from the power piston (fig. 7A).
6. Remove the diaphragm from the support plate and
lay both parts aside.
7. Position the power piston in a vise padded with
shop-towels, with the tube down (fig. 8A).
8. Using Snap Ring Pliers J-4880, remove the snap
ring from the air valve.
9. Place the power piston (tube down) in an arbor
press. Using a rod not exceeding 1/2" in diameter,
press the air valve assembly from the power piston
(fig. 9A).
10. Push the master cylinder piston rod from the
reaction retainer and remove the "O" ring from the
rod.
CAUTION:
The air valve-floating control valve-
push rod assembly is serviced as a complete
Fig. 7 A -S e p a ra tin g Power Piston fro m Support Plate
Fig. 6A-Pow er Piston and C om ponents Fig. 8A--Removing A ir Valve Snap Ring
C A U T IO N :
D O N O T C L A M P TIGHT
O N P O W ER PISTO N.
OVERHAUL MANUAL