Compressor Oil Fill, Level, And Drain; Changing The Air Intake Filter; Changing The Hydraulic Oil Cooler; Piston Ring Replacement - Boss BA440 PISTON Product Manual

Compressor Oil Fill, Level, and
Drain
Before adding or changing compressor oil, make sure
that the compressor is completely relieved of pressure.
Oil is added at the fill cap on a pipe on the rear of the
crankcase. A drain line is located on the rear panel of
the machine. Proper oil level is to the "FULL" line
on the dipstick, when the unit is shut down and has
had time to settle. The machine must be level when
checking the oil. DO NOT OVERFILL. The oil
capacity is given in "Compressor Specifications".

Changing the Air Intake Filter

The air intake filter is a heavy-duty dry type high
efficiency filter designed to protect the compressor
from dust and foreign objects.
Frequency of maintenance of the filter depends on
dust conditions at the operating site. The filter
element must be serviced when clogged. A clogged
air filter element will reduce compressor performance
and cause premature wear of components.
Maintenance

Changing the Hydraulic Oil Cooler

The interior of the oil cooler should be cleaned when
the pressure drop across it at full flow exceeds 25 PSI.
First, remove the cooler. Then, circulate a suitable
solvent to dissolve and remove varnish and sludge.
Then flush the cooler generously with hydraulic oil.
Reinstall the cooler. Once the cooler is reinstalled,
fill the hydraulic system with the proper fluid to their
appropriate levels.

Piston Ring Replacement

Shut down the machine and allow to cool for
approximately 10 minutes. Next, verify entire system
pressure is relieved before proceeding. Then,
disconnect air inlet system tubes. Now disconnect
3/4" discharge jumper hose and 3/4" discharge hose.
Unscrew the head nuts and remove the heads.
Remove the cylinder bolts and tap the sides of the
cylinder several times to break it loose from the
gasket. Next, rock the cylinder back and forth and lift
until it is free. Lift it off of the pistons. To remove the
old gasket material, just a single edged razor blade or
putty knife.
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