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Champion Operating Instructions & Parts Manual
Models 3Z180C and 3Z181C
MAINTENANCE (Continued
c. Apply pressure with finger to one belt
at midpoint span. Tension is correct if
belt can be depressed
3/8 to 1/2". Make further adjustments
if necessary.
d. Check the alignment of pulleys.
Adjust if necessary.
e. Tighten mounting hardware to secure
motor on base.
f. Re-install guard and secure
with bolts.
Never operate unit
without belt guard in place. Removal
will expose rotating parts which can
cause injury or equipment damage.
EVERY 90 DAYS OR 500 HOURS
1. Change crankcase oil. Use type and
grade oil as specified in the
section on "Compressor Oil
Specifications
2. Check entire system for air leakage
around fittings, connections, and
gaskets, using soap solution and
brush.
3. Tighten nuts and capscrews
as required.
4. Check and clean compressor
valves, as required. Replace parts
when worn or damaged.
Valves must be
replaced in original position. Valve
gaskets should be re-placed each
time valves are serviced.
5. Pull ring on all pressure relief valves
to assure proper operation.
GENERAL MAINTENANCE NOTES
)
BELTS
Drive belts must be kept tight enough to
prevent slipping. If belts slip or squeak,
see V-belt maintenance in preceding
section.
tight, overload will be put on motor
and motor bearings.
COMPRESSOR VALVES
If compressor fails to pump air or
seems slow in filling up tank, discon-
nect unit from power source, remove
valves, and clean thoroughly, using
compressed air or a soft wire brush.
After cleaning, exceptional care must
be taken that all parts are replaced in
exactly the same position and all joints
must be tight or the compressor will not
function properly. When all valves are
replaced and connections tight, close
hand valve at tank outlet for final test.
Valve gaskets should be replaced each
time valves are removed from pump.
CENTRIFUGAL UNLOADER AND
PRESSURE RELEASE VALVE
The centrifugal unloader is operated
by two governor weights. It is totally
enclosed and lubricated from the
crankcase of the compressor. When
compressor starts the governor
weights automatically open
compressing the main spring,
allowing the unloader release valve to
close. When the compressor stops,
the main spring returns the governor
weights to normal position opening
the pressure release valve and
unloading the compressor.
5
This prevents overloading the motor
when starting. If air continues to escape
through the governor or unloader
pressure release valve while operating,
this is an indication that the release valve
is not closing tightly and may be held
open by foreign substance which has
lodged on the seat. In order to correct
this, remove the governor release valve
If belts are too
cap, giving access to release valve
spring and ball. Clean thoroughly and
return parts in the same order in which
they were removed. Loose drive belts
can also cause unloader to leak by
preventing the compressor from reaching
proper speed. (See "BELTS" above.)
THE INTERSTAGE PRESSURE
RELIEF VALVE
against interstage over pressure and is
factory set for maximum pressure of .
75 PSI.
IMPORTANT: Do not reset.
If the pressure relief valve pops, it
indicates trouble. Shut down the unit
immediately and determine and correct
the malfunction. Inspect the head valves.
Serious damage can result if not
corrected and can lead to complete
destruction of the unit. Tampering with
the interstage pressure relief valve, or
plugging the opening destroys the
protection provided and voids all
warranty.
LUBRICATION OF COMPRESSOR
Fill crankcase to proper level as
indicated by oil sight gauge. Keep
crankcase filled as required by usage.
3Z180C and 3Z181C
is provided to protect
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