Rev 34.7/3-20
29
MR1611LDC: #35050
A
IR
F
ILTER
M
AINTENANCE
−
L
ARGE
(For 4.4 oz bowl size filters)
Filter Function and Conditions Requiring Service
An air filter prevents solid particles and liquid from contaminating components in the vacuum
system.
CAUTION: Examine air filter regularly and empty when necessary.
Liquid must not contact any portion of the filter element; remove trapped liquid regularly.
Replace the element if it has an overall dirty appearance, or if there is a noticeable increase in
the time required to attain full vacuum. (Refer to REPLACEMENT PARTS LIST for filter element
kit.)
Filter Service Procedures
1) Unscrew the threaded collar (8) from the body
(1). Support the body while twisting the collar, to
protect the vacuum line fittings from being
damaged. Then remove the bowl guard (7) and the
bowl (6).
2) Determine whether the filter element (3) needs to
be replaced (see Conditions Requiring Service
preceding).
If so, proceed to step 3.
If not, remove any liquid or contaminates from the
bowl; clean the old bowl seal (5) with mild soap and water; and skip to step 7.
3) Unscrew the baffle (4), and remove the element and deflector (2).
4) Discard the element and the bowl seal (5).
5) Clean all internal parts and the bowl, using mild soap and water only. Do
not use any other
cleaners.
6) Install the deflector and a new filter element; then screw the baffle back on (tighten gently,
finger-tight) to hold the element in place.
7) Lubricate the new or cleaned bowl seal, using a mineral base oil or grease (such as the
lubricant furnished in the filter element kit). Do
not use synthetic oils, such as esters, or
silicones.
8) Place the bowl seal around the rim of the bowl. Then install the bowl on the body, taking care
to avoid contaminating the filter element with lubricant.
9) Install the bowl guard and the collar, tightening it only hand-tight (28-32 in-lbs [316-362 N-
cm] torque).
10) Test the vacuum system to make sure the air filter does not leak (see V
ACUUM
T
EST
preceding,
if applicable).
WARNING: When the air filter is being used on a vacuum system, rather than with
pressure, using the twist drain to remove liquid from the bowl is
not recommended. Never
disturb the twist drain, as contaminants could lodge in the drain seal and cause a vacuum leak.
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