Chevrolet 1977 10 Series, Repair Manual, Page: 170 / 468

5-4 OVERHAUL MANUAL
Fig. 5 -7 A --R e m oving R e a ctio n P iston and R e action Disc From
S e c o n d a ry P o w e r Piston
Cleaning
Use clean brake fluid to thoroughly clean all reusable
brake parts. Im m erse in the cleaning fluid and brush metal
parts with hair brush to remove foreign m atter. Blow out all
passages, orifices and valve holes. A ir dry and place cleaned
parts on clean paper or lint free clean cloth. If slight rust is
found inside either the front or rear half housing assemblies,
polish clean with crocus cloth or fine emery paper, washing
clean afterwards. D irt is the m ajor cause of trouble and wear
in service. Be sure to keep parts clean until re-assembly. R e­
wash at re-assembly if there is any occasion to doubt
cleanliness-such as parts dropped or left exposed for eight
hours or longer.
CAUTION:
I f there is any suspicion o f
Fig. 5 -8 A ~ P o s itio n in g P rim a ry P o w e r P iston in T o o l J -2 3 1 0 1
(S m all Dia. End Up)
Fig. 5 -9 A ~ L o c k in g o r U n lo c k in g P rim a ry S u p p o rt Plate From
P rim a ry P o w e r P iston
contamination or any evidence o f corrosion,
completely flush the vehicle hydraulic brake
system. Failure to clean the hydraulic brake system
can result in early repetition o f trouble. Use o f
gasoline, kerosene, anti-freeze, alcohol or any other
cleaner, with even a trace o f mineral oil, will
damage rubber parts.
Inspecting Rubber Parts
Wipe fluid from the rubber parts and carefully inspect
each rubber part for cuts, nicks, or o ther damage. These parts
are the key to the control of fluid or air flow. If the unit is
in for overhaul or if there is any question as to the
serviceability of rubber parts, R E P L A C E them.