Air Cleaner Service; Cartridge Removal; Cartridge Installation - Hobart 90 C 20 Operation And Maintenance Manual

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5. Air Cleaner Service

The air cleaner is a dry type with replaceable filter cartridges. A definite time schedule for changing the
filter cartridge cannot be determined because of varying operating conditions. Change the filter cartridge
when the red indicator "flag" reaches the top of the viewing chamber and locks in that position. Change
the cartridge as follows:
A. Cartridge Removal (See Fig. 4)
(1) Open canopy door and remove clamp assembly (3) from air cleaner
(2) Remove baffle assembly (7).
(3) Remove primary element (4), and replace with new element.
Caution: Do not clean or re-use cartridge.
(4) Inspect the interior of the cleaner housing (1). Make certain it is free from all foreign material.
B. Cartridge Installation (See Fig. 4)
(1) Carefully install the new cartridge into the housing. Avoid bumping the cartridge tubes against the
housing sealing flange. Seat the cartridge properly within the housing. Press all edges and corners of
the cartridge firmly with fingers to effect a positive air seal against the sealing flange of the housing.
Caution: Under no circumstances should the cartridge be pounded or struck
in the center to effect a seal.
(2) Lock the cartridge in place by installing the baffle assembly (7) and clamp assembly (3) with cup
assembly (8) in place. Tighten clamp (3) down in place.
1. Body Assembly
2. "O" Ring
3. Clamp Assembly
4. Primary Element
November 18/91 Revised
Air Cleaner Cartridge Replacement
Figure 4
5. Washer Gasket
6. Wing Nut
7. Baffle Assembly
8. Cup Assembly
OM-2031
2-1
Page 5

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