Section 6
MAINTENANCE
22
5. At this time, clean or replace the element.
6. Reassemble in reverse order of disassembly.
AIR FILTER ELEMENT CLEANING
The a ir filter element is cleanable by one of two
methods. One method is by washing with a mild
household detergent and water. The other method
is using compressor air. The maximum amount of
times that an element should be cleaned is six (6),
however, the element should be used no longer
than a period of one (1) year without changing.
Prior to cleaning an element, check the element for
damage. Damaged elements must be replaced.
When cleaning an element, never exceed the rec-
ommended maximum pressure for water (40 PSIG
[276kPa]) or compressed air (30 PSIG [207kPa]).
DO NOT strike the element against any hard sur-
face to dislodge dust. This will damage t he sealing
surfaces and possibly rupture the element.
DO NOT “ blow” dirt out of the interior of the filter
housing. This may introduce dust downstream of
the filter. Instead, use a clean damp cloth.
DO NOT oil the element.
METHOD 1 -- CLEANING THE ELEMENT B Y
WASHING
When washing the element, NEVER use petroleum
solutions or solvents. Also, never immerse a dirty
element in water or cleaning solution. This will carry
dust onto the “clean s ide” (inside surface) of the
element. Instead, dust must be removed by re-
verse flushing the element. Use clean clear water
with a garden hose at no more that 40 PSIG
(276kPa). Direct the wa ter up and down the pleats
in the filter media from the “clean side” of the ele-
ment until all dust is removed.
If, after washing as described above, the element is
found to be contaminated w ith fluid or greasy dirt, it
should then be agitated in a solution of mild house-
hold detergent and water. Add 4 tablespoons of de-
tergent to one gallon of lukewarm w ater and mix
well. After a sufficient amount of agitation has been
done, rinse thoroughly and carefully shake out ex-
cess w a ter. Lay the element on its side and allow t o
dry before installation. The element should be pro-
tected from dirt and/or freezing while drying. Me-
chanical drying methods can be used, however,
heated air must be well circulated and must not be
over 180_F(82_ C). DO NOT use a light bulb for dry-
ing. Also, compressed air must not be used for dry-
ing, as the pressure will rupture the element when
wet. Regardless of the drying procedure, always in -
spect t he element for damage prior to installation
(see Element Inspection).
METHOD 2 -- CLEANING THE ELEMENT WITH
COMPRESSED AIR
When cleaning the element with compressed air,
never let the air pressure exceed 30 PSI (207kPa).
Reverse flush the element by directing the com-
pressed air up and down the pleats in the filter me-
dia from the “clean side” of the element. Continue
reverse flushing until all dust is removed. Should
any fluid or greasy dirt remain on the filter surface,
the element should then be cleaned by Method 1.
When the element is sufficiently cleaned, inspect
thoroughly prior to installation (see Element In-
spection).
ELEMENT INSPECTION
1. Place a bright light inside t he element to inspect
for damage or leak holes. Concentrated light will
shine through the element and locate any holes.
2. Inspect all gaskets and gasket contact surfaces
of the housing. Should faulty gaskets be evi-
dent, correct the condition immediately.
3. If the clean element is t o be stored for later use, it
must be stored in a clean container.
4. After the element has been installed, inspect and
tighten, if necessary, all air inlet connections
prior to resuming operation.
SEPARATOR ELEMENT REPLACEMENT
Refer t o Figure 6 --- 4. The s eparator elements must
be changed when the maintenance gauge pointer
moves into the red zone, or once a year whichever
comes first. Order separator element kit number
250034---126 (primary) and number 250034---132
(secondary), and follow the procedure explained
below for separator element replacement.
1. Relieve all pressure from the separator and all
compressor lines.
2. Disconnect all piping connected to the separator
cover to allow removal (return lines, service
lines, etc.).
3. Loosen and remove the twelve (12) #@4”x3”hex
head capscrews from the cover plate.
4.Liftthecoverplatefromtheseparator.
5. Remove the primary and secondary separator
elements.
6. Scrape the old gasket material from the cover
and flange on the sump being careful not to let
the scraps fall in the sump.
7. Inspect the separator tank for rust, dirt, etc.
8. Reinsert the separator elements, with gaskets
attached, into the sump taking care not t o dent it
against the tank opening.
9. Clean the underside of the separator tank cover
and remove any rust.
10. Replace the cover plate, washers and caps -
crews. Torque to 55 ft./lbs. (75Nm).
11. Reconnect all piping making sure the return line
tube extends to the bottom or !@4”abovethebot-
tom of the separator element. This will assure
proper fluid return flow to the compressor.
12. Check the return line filter before restarting the
compressor.
CONTROL SYSTEM ADJUSTMENT
Refer t o Figures 6 --- 5 a nd 6 --- 6. Prior t o a dj usting
the control system, it is necessary to determine t he
desired operating pressure range and also the
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