Dry Type Filter Silencer; Filter Silencer, Dry Type; Piston Rings; Pistons - Champion A Series Operating And Service Manual

type of filter is used, specific instructions for mainte-
nance must be obtained from the manufacturer or
Champion.
DRY TYPE FILTER SILENCER -- Service every 1 to 30
days, as established for existing conditions:
1. Stop compressor and wipe dirt from exterior of fil-
ter.
2. Remove filter and disassemble. Clean cover and
base.
3. Replace dirty filter element with a new element.
See parts list for replacement element part num-
ber.
4. Reassemble filter on compressor.
While servicing filter, examine all
parts for damage. Do not operate unit
with damaged filter parts.
VALVES -- The concentric valves are vital working
parts of the compressor and must be inspected and
cleaned at regular intervals. Factors regulating clean-
ing intervals are filter service, prevailing dust and atmo-
spheric conditions, quality and carbon--forming ten-
dency of oil used, and operating temperature.
Until experience indicates the proper cleaning interval,
inspect and clean the valves every 1000 hours or every
four months, whichever occurs first. If compressor out-
put drops, valves become noisy or hot; stop the unit and
inspect all valves. DO NOT CONTINUE TO RUN THE
UNIT, AS SERIOUS DAMAGE MAY RESULT. Never
operate the unit with a badly worn or broken valve part.
Keep a supply of valve assemblies, valve parts and O--
rings on hand to reduce down time.
One concentric suction and discharge valve is located
in pockets in the head over each cylinder bore. Refer
to parts list for sectional views of various type valve as-
semblies used in these machines. When disassem-
bling the valves note the manner in which the various
parts are arranged to assure proper assembly.
With a screwdriver inserted through the seat porting,
check the disc action for free movement. When instal-
ling the valve assembly in the cylinder head use new
seat and clamp O--rings. A small amount of grease will
hold seat O--ring on valve while lowering into place. The
nut holding the valve assembly together must go up,
away from the piston. Refer to parts list for assembly
views.
SUCTION VALVE UNLOADING MECHANISM -- Un-
loading the compressor is accomplished by a plunger
holding all suction valves off their seats when the pre-
determined air pressure, for which the unloading con-
trol is set, is reached. When air is applied above the
plunger piston, the entire assembly moves as a unit un-
til the valve is forced wide open against the bumper.
When air is released by the control, a spring returns the
plunger to its uppermost position allowing free action of
the valves and loading of the compressor. Refer to
parts list for assembly views.
Never run the compressor with a
valve that does not operate properly
as a leaky valve will cause excessive
temperatures and may cause an
explosion in the air receiver or
discharge line.
Clean and inspect all parts when the valves are serv-
iced. Replace any weak or broken springs. Replace the
"O"--ring on the unloader plunger when worn. The
"O"--ring must be lubricated with a high--temperature
"O"--ring grease.
PISTONS -- When installing pistons in the cylinder
make sure there are no burrs or dirt to affect running
clearances.
PISTON RINGS -- Piston rings must always be proper-
ly installed for proper break--in and controlled oil carry--
over. Rings having a "pip" mark on one side near the
ring gap must be installed and mark up towards the top
of the piston; if rings are installed up--side--down, oil
consumption will result. See parts list for piston ring ar-
rangement.
Cleanliness precautions must be observed when as-
sembling the parts to avoid possible scoring of the
rings, piston and cylinder. Install the rings with care to
avoid burrs and deep scratches. Oil the rings and cylin-
der wall during assembly. Stagger the ring gaps.
At the bottom of the cylinder is a large chamfer to aid
the installation of the rings and piston in the cylinder.
The suggested method of assembly is to have piston
assembled to conn rod with piston pin. Center the rings
on the piston as you guide piston into bottom of cylin-
der. With piston in cylinder, reassemble the cylinder to
the crankcase and then assemble the conn rod to the
crankshaft.
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