MCi Crusader II 1989 Maintenance Manual page 394

Date
1-1-89 ·
Page
12-14
MC-9 MAINTENANCE MANUAL
The air filter and check valve assembly is used at the inlet
port of each height control valve. These filters exclude foreign
matter and the check valve assembly prevents air pressure
from returning to the auxiliary air system. Regular service inter-
vals should be maintained on these assemblies. If the filter
elements become clogged they will retard the airflow in and out
of the system.
REMOVAL AND DISASSEMBLY
1. Install blocks under coach at jacking points and exhaust
air from auxiliary system by opening drain cock on auxiliary air
tank.
2. Remove height control valve link. Do not disturb link
adjustment
3. Move control arm down to exhaust air from air springs
and/or air beams.
4. Disconnect air lines from air filters.
5. Disconnect air lines from filter and check valve
assemblies.
6. Remove filter from control valve.
7. Cover inlet port of control valve to prevent entry of dust
and dirt
8. Clamp filter in vise and remove filter element and gasket
from body. See figure 12-22.
9. Clamp the air filter and check valve in the vise with filter
cover up.
10. Remove coverfrom body and remove filter element Use
end wrench on check valve cap and remove cap from body.
1 1. Lift check valve spring out of body and remove body
· from vise. Check valve is then loose.
Bod
D
Grommet . , , Screen
Figure 12-22. Air Line Filter Components.
INSPECTION
1. Examine bronze filter elements and immerse all parts in
cleaning solvent and wash thoroughly.
2. Blow out all parts
with
compressed air and blow air
through bronze filters. ·
3. Examine check valve seat Seat must be clean and free
from scratches or damage.
4. If seat is damaged, replace body. Always use new gaskets
on reassembly.
REASSEMBLY
1. Clamp air filter body in vise, large end up.
2. Apply Lubriplate to new gasket and at bottom of threads
on filter body.
3. Place on filter element with the small end up and place
spring over filter.
4. Tighten filter cover on to the body firmly.
5. On filter and check valve install filter in same manner into
filter and check valve body. Check valve may then be dropped
into body with Hat side down against seat
6. Place spring over raised center.
7. Install gasket on check valve cap and tighten cap firmly
into the check valve end of the body.
Figure 12-23. Pressure Protection Valve Installation.