MCi Crusader II 1989 Maintenance Manual page 170

Date
1-1-89
Page . __
4_-4_o _ _ _
MC-9 MAINTENANCE MANUAL
9. Set the conical spring on top of the perforated plate.
(Large diameter down - small diameter up.)
10. Place the spring retainer on top of the spring (figure
4-53l.
12.
Using the lock nut, draw the assembly together to
approximately half of the spring·s free height. While slowly
turning the cartridge. tap the side of the shell with a plastic
mallet (figure 4-54). This allows the desiccant material to settle
property into place. Continue to tighten the nut, making sure all
items are properly aligned. Tigl:'lten nut firmly using an 11 / 16"
socket or box wrench. ·
Figure 4-53. Installing Spring and Spring Retainer.
REBUILDING END COVER ASSEMBLY
To remove the end cover assembly from the air dryer, follow
steps 1
·6
under the section entitled Removal of Desiccant
Cartridge. Before rebuilding the end cover, clean the exterior
thoroughly using commercial solvent.
DISASSEMBLY OF END COVER ASSEMBLY.
1. Remove and discard the large O-ring around the end
cover assembly.
2. Remove the single No. 6-32 screw securing the exhaust
diaphragm and separate the diaphragm, washer and screw.
Discard the diaphragm. ·
3. Remove the three No. 6-32 screws securing the exhaust
cover and remove the exhaust cover.
Figure 4-54. Tapping To Settle Desiccant.
4. Remove the purge valve assembly, the large hex cap nut,
from the end cover and discard both O-rings around the cap
nut.
5. Using a 7 /16" socket wrench and a large screwdriver.
remove the¼" -20 hex head capscrew which holds the assem-
bly together.
6. Separate capscrew, purge valve, purge valve piston and
the piston return spring.
7. Discard the piston O-ring, the purge valve, and the piston
return spring. Wash all remaining parts in a commercial solvent.
making sure all surfaces, bores, ports and passages are clean
and dry before assembly.
REASSEMBLY OF END COVER ASSEMBLY
1. Lubricate the piston O-ring and install it on the piston.
2. Lubricate and install the piston.
3. Install the purge piston return spring and piston.
4. Install the purge valve in the large cap nut so that the
rubber portion rests on the metal seat of the capnut.
5. Secure the valve to the piston using the ¼-20 capscrew
and lockwasher and torQue to 50 inch lbs. (5.6 Nm).
6. Lubricate and install the two capnut O-rings.
7. Lubricate the capnut threads and the capnut bore of the
end cover and install the capnut, tightening it to
180-250
inch
lbs. (20.3-28.2 Nm) torQue.
8. · Secure the exhaust diaphragm to the exhaust cover using
the No. 6-32 phillips head screw and diaphragm washer.
9. Secure the exhaust cover to the purge valve hex head
capnut using No. 6-32 phillips head screws.
10. Lubricate and install the large diameter O-ring around
the end cover assembly.
CAUTION: The heater and thermostat
assembly in the dryer and cover are non-
serviceable. Do not remove the thermostat
cover. Should this anembly become ct.tec-
tlve, the end cover must be replaced.