Section 4 -- Maintenance 4-8
© 2008, Satake USA Inc.
(ALL RIGHTS RESERVED)
4.8.1 SERVICING THE PREFILTER (See Figure 4-2)
The PREFILTER is designed to remove most of the liquid and solid particles from the
compressed air. This filter uses a clear plastic bowl so that the filter element is
clearly visible to monitor dirt buildup. The PREFILTER is serviced as follows:
A. Turn off the air to the machine and reduce the air pressure in the bowl to
zero.
B. Remove the drain line.
C. Remove the clear polycarbonate plastic bowl by turning counter-clockwise.
D. Wash the bowl in warm water with NO detergent.
NOTE
: The bowl can be damaged and possibly burst if exposed to certain
solvents, strong alkalizes, compressor oils containing ester-based
additives, or synthetic oils. If this is a problem, the plastic bowl can be
replaced with the metal bowl as used on the Oil Removal Filter. This
bowl is directly interchangeable between the two filters. (See Section
4.8.2)
E. Remove the filter element by turning the baffle counter-clockwise. Remove
the louver section by pulling downward.
F. Wash the filter element, baffle, louver section, and o-rings in warm water and
soap. Rinse and dry these parts. Using clean, dry compressed air, blow
through the filter element from the inside to the outside to dislodge surface
contaminants. If the filter element has become clogged to the point that it
cannot be cleaned effectively, it must be replaced.
G. Blow out the internal passages in the body with clean, dry compressed air.
H. Inspect all parts and replace any that are not in good condition.
I. Apply a coat of Dow Corning 44 grease (or equivalent) to the o-rings.
J. Reassemble the filter according to Figure 4-2. Make certain that all o-rings
are installed in the correct location. Ensure that the filter element is
centered within the louver section before tightening the baffle. Install the o-
ring on the top lip of the bowl before rotating the bowl into place.
K. Return the filter to operation by turning on the air and checking for leaks.
4.8.2 SERVICING THE OIL REMOVAL FILTER (See Figure 4-3)
The OIL REMOVAL FILTER coalesces oil mist into larger droplets. The oil droplets
are collected by a porous foam sock around the outer surface of the filter element.
The droplets then drain downward into the bottom of the bowl. The filter element
also removes very small solid particles.
A service life indicator on the top of the OIL REMOVAL FILTER is normally green. As
the filter element collects particles, a pressure drop will gradually develop between
the inlet and outlet sides of the filter. As the pressure drop increases, red will start
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