MCi Crusader II 1989 Maintenance Manual page 112

Date 1-1-89 .
Page _· __
3_-3_1 _ _
MC-9 MAINTENANCE MANUAL
WINDSHIELD WIPER CONTROL VALVE
Windshield wipers are controlled by two small knobs situ-
ated at the lower right side of the instrument panel. Each knob
controls its corresponding windshield wiper.
To operate wipers, tum control knob for wiper desired
toward direction indicating ON until required speed is reached.
To stop wipers, turn knob to OFF position.
REMOVAL
Individual wiper motor control motor valves (figure 3-37)
can be removed from the vehicle for cleaning or repair if
necessary. Before removing valve assembly, vent air pressure
from system.
Remove the four screws (11) which attach cover (3) to the
body
(1 ).
Separate cover from the body.
Pull parking valve stem
(4)
with O-ring from the valve body
(1 ).
Remove valve spring
(5).
Using pliers with a small, thin nose, pull pressure regulat-
ing ram
(9)
with guide washer
(10)
from the valve body
(1).
Remove pressure regulating coil spring
(8).
NOTE: Do not disassemble valve further if
not necessary.
1. Body Assembly
2. Cam
3. Cover Cap
4. Parking Valve Stem Assembly
5. Spring
6. Valve Stem
7. O-Ring Retainer
8. Spring
9. Pressure Regulating Ram
10.
Guide Washer
11.
Screw
12. Plastic Knob
13. Cam Rod
14. O-Ring
15. Nut
Clean all parts in solvent; then, applying air pressure into
valve body ports, blow any dirt and solvent from valve body.
Using a soft material object. force valve seat and retainer
(7
and
8)
back and forth within the body; then repeat cleaning
procedure.
NOTE: If retainer, valve seat assembly
appear to be damaged, repair or replace
entire hand control valve assembly.
Apply small quantity of wiper motor lubricant to valve sur-
faces and rubber rings. Install valve and check operation.
WINDSHIELD WIPER.TROUBLESHOOTING
1. MOTOR WILL NOT OPERATE
Inadequate air supply to motor
Solution: Check the air compressor operation and air
lines leading to the control valve for contamination. breakage or
leaks.
Defective control valve
Solution: Check the control valve knob for sticky condi-
tions. or check intake and feeder ports for blocked operations.
Also check O-rings in control valve tor leaks. and air lines
leading from control valve to motor for air leaks, contamination
or
breaks.
C?fr,'~~
I
9
a
10
6
1
Figure 3-37. Wiper Control Valve.