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Monthly Preventive Maintenance Requirements
Figure 4.3: Air Filter Canisters
CHRISTIE INC. - 35/70 Service/PM Manual
July, 1997
Replace the element for ANY of the following reasons:
•
Pleated media is cut, torn, worn, or uncleanable.
•
Metal end caps (if so equipped) are bent out of flat.
•
Perforated metal bent into pleated media.
•
Gasket is cut, deformed, or damaged in any manner.
4 : P e r i o d i c M a i n t e n a n c e
Table 4.4 contains the monthly preventive maintenance
checklist/log sheet.
1.
Check the belt tension on all four belts (see Figure 4.1).
This check is accomplished by pushing the center of one
side of the belt with moderate pressure and ensuring that the
belt deflects approximately ¼" (6 mm).
2. Service the air filter canister:
a.
Remove the wing nut on top of the air filter canister.
(See Figure 4.3.) It is not necessary to remove the hose
clamp.
b.
Carefully lift off the top cover of the canister, taking
care not to kink the flexible hose. Then slide the
cylindrical shell of the canister up and set it aside.
c. Unscrew the nut on top of the filter to free the filter from
the threaded center post, and slide the filter off.
d.
If replacement is not necessary, clean the element:
1) Blow dry compressed air (30 PSI or less) through
the element from the clean side.
2) If necessary, wash the element in warm (120° F or
less) water solution with household detergent.
Rinse thoroughly. Examine pleated media
carefully to determine that the media has not been
damaged.
e.
Reassemble the filter canister in reverse order, using a
new filter.
3.
Remove all four cleaner brushes with snap-ring pliers and
clean the brushes with compressed air outside of the
projection booth.
4.
Visually inspect the entire projection system for loose
connections.
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