Section 7
MAINTENANCE
26
prior to resuming operation.
AIR FILTER MAINTENANCE (200-250HP/ 150-
187KW)
Refer to Figure 7-4. Air filter (P/N 048456) mainte-
nance should be performed when the air filter main-
tenance indicator shows red. The maintenance indi-
cator is located on the filter outlet. The air filter is
equipped with a primary element and a secondary
element. As previously stated, the restriction indica-
tor will alert you as to when primary element main-
tenance is necessary. When removing the primary
element, always check the secondary element for
visible dirt, grease or damage. The secondary ele-
ment must be changed after every third element
change or once a year, whichever comes first.
DO NOT reconnect the secondary element once it
is removed.
ELEMENT REMOVAL
1. Clean the exterior of the air filter housing.
2. Remove the cover assembly by loosening the
wingnut securing the cover clamp.
3. Remove the element assembly from the hous-
ing by unscrewing the wingnut.
4. Clean the interior of the housing by using a
damp cloth. DO NOT blow dirt with compressed
air as this may introduce dust downstream.
5. Inspect the secondary element restriction indi-
cator. Replacement element if necessary.
6. To remove the secondary element, unscrew the
secondary restriction indicator from the thread-
ed rod running through the element. Pull the ele-
ment out of the housing.
7. Install the new secondary element and replace
the restriction indicator.
8. With the secondary element in place, replace
the primary element.
ELEMENT INSPECTION
1. Place a bright light inside the element to inspect
for damage or leak holes. Concentrated light will
shine through the element and disclose any
holes.
2. Inspect all gaskets and gasket surfaces of the
housing. Should faulty gaskets be evident, cor-
rect the condition immediately.
3. If the clean element is to be stored for later use,
it must be stored in a clean container.
4. After the element has been installed, inspect
and tighten all air inlet connections prior to
resuming operation.
PRIMARY ELEMENT REPLACEMENT
1. Place the element in position on the cover and
replace the lockring to secure the cover and ele-
ment.
2. Install the cover/element assembly and replace
the wingnut. Tighten the wingnut so to fully seat
the element gasket.
SEPARATOR ELEMENTS REPLACEMENT
Refer to Figure 7-5. The separator elements must
be changed when the maintenance gauge is show-
ing red, or once a year whichever occurs first. Order
separator elements no. 250034-121 (primary) and
no. 250034-134 (secondary). Follow the procedure
explained below for separator element replace-
ment.
1. Disconnect all piping connected to the separator
cover to allow removal (return lines, service
lines, etc.).
Figure 7-5 Separator Elements
*Replacement Element P/N 250034-121(primary)
**Replacement Element P/N 250034-133 (secondary)
Relieve all pressure from the separator and all
compressor lines prior to disconnecting any
pipes, tubing, etc.
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