The oil filter must be replaced every 500 hours
Piping systems operating at less than 150 psi
of operation. On new or overhauled units,
(1050 kPa) may use a special nylon tubing. The
replace the element after the first 50 and 150
associated fittings are also of a special "push-
hours of operation; thereafter, service the oil
in" design. If so, features are as follows:
filter every 500 hours.
Pulling on the tubing will cause the inner sleeve to
To service the oil filters it will first be necessary to
withdraw and compress, thus tightening the
shut the unit down. Wipe off any external dirt and oil
connection. The tubing can be withdrawn only while
from the exterior of the filter to minimize any
holding the sleeve against the fitting. The tubing
can be removed and replaced numerous times
Proceed as follows:
without losing its sealing ability.
To install the nylon tubing, make a mark (with tape
or grease pencil) approximately 7/8 inch from the
end of the tubing. Insert the tubing into the sleeve
High pressure air can cause severe injury or
and "push-in" past the first resistance to the bottom.
death from hot oil and flying parts. Always
The mark should be approximately 1/16 inch from
relieve pressure before removing caps, plugs,
the sleeve, for the 3/8 inch O.D. tubing; 1/8 inch for
covers or other parts from pressurized air
the 0.25 inch O.D. tubing. This will ensure that the
tubing is fully engaged in the sealing mechanism.
1. Open the service air valve(s) to ensure that
system is relieved of all pressure. Close the
includes dual spin-on, throw away type oil filters,
2. Turn the spin-on filter element counterclockwise
each with an internal bypass valve. With a clean,
to remove it from the filter housing. Inspect the filter
new filter element, all of the oil flows through the full
element and then discard.
element area, from the outside/inside. As each
Note: If there is any indication of formation of
element becomes contaminated with dirt, a pressure
varnishes, shellacs or lacquers on the oil filter
differential is created in the filter housing between
element, it is a warning the compressor lubricating
the oil inlet and outlet ports. As this differential
oil has improper characteristics and should be
approaches 25 psi (175 kPa), the bypass valve
starts to open, thus permitting a small quantity of oil
3. Inspect the oil filter head to be sure the gasket
build up, more and more of the oil bypasses the filter
was removed with the oil filter element. Clean the
gasket seal area on the oil filter head.
This bypass does not provide any filtration but does
Installing a new oil filter element when the old
allow a maximum flow of compressor lubricating and
gasket remains on the oil filter head will cause an oil
cooling oil to preclude any possible damage from
leak and can cause property damage.
loss of oil. Also the design of the filter prevents any
4. Lubricate the new filter gasket with the same oil
washing-off of any dirt during oil bypassing.
being used in the machine.
5. Install new filter by turning element clockwise
until gasket makes initial contact. Tighten an
additional 1/2 to 3/4 turn.
6. Start unit and allow to build up to rated
pressure. Check for leaks before placing unit back