Daily Maintenance; Weekly Maintenance - Champion 3Z172 Instructions D'utilisation Et Manuel De Pièces

Champion Operating Instructions & Parts Manual
Champion Single-Stage Air
Compressor Pump
Operation (Continued)
IMPORTANT: This compressor has a
maximum operating pressure of 120 PSIG.
Do not alter pressure settings on control
components above this limit.
CONSTANT SPEED UNLOADING &
PILOT VALVE (FOR THE COMPRESSOR
E
EQUPPED WITH OPTIONAL HEAD
N
UNLOADER VALVE)
G
L
The pilot valve is designed to act as an
I
automatic ON and OFF air switch. When in
S the ON position it allows air to flow from
the tank through the valve to the
H
compressor head unloader mechanism, thus
actuating it. In the OFF position this valve
stops the flow of air through the valve and
releases the pressure in the line to the head
unloader.
The pilot valve works as follows: Tank air
pressure acts on the bottom of the valve.
When pressure is great enough to
overcome spring force holding valve down
on lower seat, it lifts off seat and allows air
to flow around valve and out through side
opening in pilot valve. When valve lifts off
lower seat it moves up and seats on upper
seat where it is held by tank pressure.
When pressure in tank and on valve drops,
spring forces valve back down on lower
seat. Air in line to device being actuated
can then escape through upper seat and
out vent hole. The pressure at which the
pilot valve is ON or OFF is controlled by the
spring which has been installed at the
factory. A small adjustment can be made in
the field by changing the spring force by
compressing the spring more or less with
the adjusting screw provided on the pilot
valve.
COMPRESSOR PILOT VALVE
PRESSURE ADJUSTMENT
Refer to Figure 2.
Proceed with the following instructions
while compressor is running:
1.
Loosen locknut (Ref. No. 4) and
back off several turns. Do not turn
differential adjuster (Ref. No. 3).
2. Check reading on the tank pressure
gauge. Set the compressor pressure at
95 PSIG. Turn threaded cap
(Ref. No. 1)
clockwise to increase pressure or
counterclockwise to decrease
differential pressure.
3.
After pressure is set, tighten locknut
(Ref. No. 2). Be careful not to move
threaded cap (Ref. No. 1).
COMPRESSOR PILOT VALVE
DIFFERENTIAL PRESSURE
ADJUSTMENT
Proceed with the following instructions
while compressor is running:
1. Loosen locknut (Ref. No. 2) and back
off several turns.
2. Check reading on the tank pressure
gauge. Set the pressure to 20 PSIG
differential (unload at 95 PSIG
reload at 75 PSIG). Turn nut
(Ref. No. 3) clockwise to increase
differential pressure or
counterclockwise to decrease
differential pressure.
3. After pressure is set, tighten locknut
(Ref. No. 2). Be careful not to move
nut (Ref. No. 3).
Pilot Valve
Assembly Part No. Pressure Range
M2855 75 - 95 PSIG
M2854 90 – 120
B-980-B
(Ref. Drawing)
Figure 2 – Adjusting Pilot Valves
Maintenance
To obtain reliable and satisfactory service,
this unit requires a consistent preventive
maintenance schedule.
A maintenance schedule form is included to
aid in keeping the proper records.
Before performing any
maintenance function, switch main
disconnect switch to OFF position to assure
no power is entering unit. Lock out or tag
out all sources of power. Be sure all air
pressure in unit is relieved. Failure to do
this may result in injury or equipment
damage.
4

DAILY MAINTENANCE

1.
Check oil level of both compressor and
engine if so equipped. Add quality
lubricating oil as required. See section on
"Compressor Oil Specifications".
2.
Drain moisture from tank by opening
tank drain cock located in bottom of
tank. Do not open drain valve if tank
pressure exceeds 25 PSIG.
3.
Turn off compressor at the end of each
day's operation. Turn off power
supply at wall switch.

WEEKLY MAINTENANCE

1.
Clean dust and foreign matter from
cylinder head, motor, fan blade, air
lines, intercooler and tank.
2.
Remove and clean intake air filters.
Do not exceed 15 PSIG
nozzle pressure when cleaning element
parts with compressed air. Do not direct
compressed air against human skin. Serious
injury could result. Never wash elements in
fuel oil, gasoline or flammable solvent.
3.
Check V-belts for tightness.
The V-belts must be tight enough to
transmit the necessary power to the
compressor. Adjust the V-belts as
follows:
a.
Remove bolts and guard to access
compressor drive.
b.
Loosen mounting hardware which
secures motor to base. Slide motor
within slots of baseplate to desired
position.
3Z172