Chevrolet CHEVY VAN G10 SERIES Service Manual page 319

INTAKE
V A LV E
OPEN
EXHAUST
VALVES
CLOSED
INTAKE
V A LV E
CLOSED
TO
NOZZLES
VALVES
OPEN
Removal of Pump Assembly
1. Raise vehicle hood and disconnect ground cable from
battery.
2. Remove left heater duct attached to engine shroud, for
access.
3. Disconnect washer hoses and electrical connections from
assembly.
4. Remove 3 screws securing washer pump and cover to
wiper assembly. Remove pump from wiper gear box.
Valve Assembly
1. Remove the four (4 ) screws that attach the valve assem­
bly to the pump housing.
C A U T IO N : During re-assembly
between housing and valve plate is properly posi­
SPRING
PISTON
PISTON
SPRING
EXPANDED
Fig. 31 —Cross Section o f Windshield Washer Pump Valve Assembly
be sure gasket
E L E C T R IC A L -B O D Y A N D CHASSIS 12-19
DIRECTION OF T R A V E L
/ / I
- ACTUATOR P LA T E
I N T A K E S T R O K E
DIRECTION OF T R A V E L •
ACTUATO R P L A T E
E X H A U S T
tioned in the housing and valve plate grooves. Also
be sure triple " O " ring is properly installed between
valve and pipe assembly.
2. Assemble washer pump in the reverse order o f disassem­
bly.
LUBRICATION SPECIFICATIONS
Gear Teeth
Gear Shaft
Armature Shaft (Worm Area)
Armature Shaft (Bearing Areas)
^ / / / / \
S T R O K E
T exaco M ultifax N o . 2
or
Sun Oil C o. Prestige N o . 4 2
or equivalent
T exaco M ultifax EP 1
or
equivalent
C H E V Y V A N SH O P M A N U A L