Chevrolet 1980 Light Duty Truck Repair Manual page 145

VALVE POPPET
POPPET RETAINER
VALVE ROD SPRING
SILENCER
SILENCER RETAINER
10. A pply talcum powder to inside w all o f rear housing
and silicone lubricant to the scalloped cutouts o f front
housing and to seal in rear housing. A ssem ble diaphragm
and plate assembly into rear housing by carefully guiding
rear plate hub through seal in rear housing. Bosses on center
plate m ust be aligned between lances in rear housing for
reassembly. W ork outer rim o f front diaphragm into rear
housing with screwdriver blade so that it is under lances in
housing.
11. A ttach base o f H olding Fixture J-22805 to front
housing w ith nuts and washers and draw down tight to
elim inate bending or damage to studs.
REAR DIAPHRAGM,
REAR DIAPHRAGM RETAINER
REAR SHELL
RONT DIAPHRAGM
CENTER PLATE
F ig . 5 - 5 B ~ D ia p h r a g m a n d P la te s
on arbor press plate by a suitable m eans (fig. 5-4B).
housing. U se three washers and nuts to attach w rench to
housing. Place a suitable piece o f pipe (approxim ately two
inch I.D . and approxim ately three inches in length) over
plastic diaphragm plate hub. Place a piece o f flat stock steel
over end o f pipe.
o f spring is against front housing.
SQUARE SECTIONED O-RING
VALVE RETURN SPRING
VALVE PLUNGER
REAR DIAPHRAGM PLATE,
SPRING
REACTION DISC
FRONT DIAPHRAGM PLATE
12. Secure front housing and H olding Fixture J-22805
13. Place Spanner W rench J-9504 over studs on rear
14. Install diaphragm return spring so that sm all end
BRAKES 5-9
FRONT SHELL
O V E R H A U L M A N U A L