Book 22091102 (12/01)
33
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SECTION 6 -- MAINTENANCE
GENERAL
In addition to periodic inspections, many of the compo-
nents in these units require periodic servicing to pro-
vide maximum output and performance. Servicing
may consist of pre--operation and post-- operation pro-
cedures to be performed by the operating or mainte-
nance personnel. The primary function of preventive
maintenance is to prevent failure, and consequently,
the need for repair. Preventive maintenance is the
easiest and the least expensive type of maintenance.
Maintaining your unit and keeping it clean at all times
will facilitate servicing.
SCHEDULED MAINTENANCE
The maintenance schedule is based on normal opera-
tion of the unit. This page can be reproduced and used
as a checklist by the service personnel. In the event
unusual environmental operating conditions exist, the
schedule should be adjusted accordingly.
COMPRESSOR OIL LEVEL
The oil level is most consistent when the unit is RUN-
NING AT FULL LOAD and should be checked at this
time.The optimum operating level is midway of the
sight tube on the side of the receiver tank. See the de-
cal beside the sight tube. If the oil level is not in the
”OK” range, make appropriate corrections (Add or
Drain). A totally filled sight tube in which the level is
not visible indicates an over--full condition and re-
quires that oil be drained.
AIR CLEANER
This unit is equipped with an AIR FILTERS RE-
STRICTED lamp on the instrument panel, covering
both the engine and the compressor.
This should be checked daily during operation. If the
lamp glows (red) with the unit operating at full speed,
servicing of the cleaner element is necessary. Also
weekly squeeze the rubber valve (precleaner dirt
dump) on each air cleaner housing to ensure that they
are not clogged.
NOTE:
Holes or cracks downstream of the air cleaner
housing will cause the restriction indicators to be
ineffective.
The air filters restricted sensor will automatically reset
after the main power switch is flipped to “OFF.”
To service the air cleaners on all units proceed as fol-
lows:
1.
Loosen outer wing nut and remove with outer
element. Inspect red window on special inner
wing nut to find small dot. If dot is not visible, re-
move cotter pin and special wing nut and inner
(safety) element.
2.
Inspect air cleaner housing for any condition
that might cause a leak and correct as neces-
sary.
3.
Wipe inside of air cleaner housing with a clean,
damp cloth to remove any dirt accumulation,
especially in the area where the element seals
against the housing.
4.
Inspect element by placing a bright light inside
and rotating slowly. If any holes or tears are
found in the paper, discard this element. If no
ruptures are found, the element can be cleaned
by one of the following procedures.
5.
If a new air filter element is to be used check it
closely for shipping damage. To reset the sig-
nal indicator in the special wing nut, apply suc-
tion to the red window.
6.
Install cleaned or new elements in the reverse
order to the above. Tighten wing nuts firmly and
replace cotter pin.
7.
Inspect to ensure that the end cap seals tightly
360 degrees around the air cleaner body.
In the event that the filter element must be reused im-
mediately, compressed air cleaning (as follows) is rec-
ommended since the element must be thoroughly dry.
