John Deere HR1-20E - Manuel (Page 10)

0 Electric Air Compressor Manual
OIL DIPSTICK: The dipstick will indicate the amount of oil in the
pump. Oil level should be checked on a daily basis to ensure it
does not exceed the maximum notch or fall below the minimum
notch on the dipstick.
AIR TANK DRAIN VALVE: The drain valve is used to remove mois-
ture from the air tank after the air compressor is shut off. NEVER
attempt to open the drain valve when more than 10 PSI of air
pressure is in the air tank! To open the drain valve, turn the knob
counterclockwise. Keep the air compressor in such a position that
all water condensation will flow out.
AIR COMPRESSOR PUMP: To compress air, the piston moves up
and down in the cylinder. On the downstroke, air is drawn in through
the air intake valve while the exhaust valve remains closed. On the
upstroke, the intake valve closes, air is compressed and forced out
through the exhaust valve, into the discharge line, through the tank
check valve and into the air tank.
AIR COMPRESSOR FEATURES
TANK CHECK VALVE: This valve prevents the compressed air in
the tank from re-entering the pump discharge line.
EASY START VALVE: This valve relieves a portion of the com-
pressed air which allows the motor to start easier. The valve auto-
matically closes at a preset pressure which allows the full volume
of compressed air to go into the air tank.
It is recommended this air compressor not be operated at more than
a 50% duty cycle. This means an air compressor that pumps air
longer than 50% of one hour is considered misuse. Maximum air
compressor pumping time per hour is 30 minutes.
SAFETY RELIEF VALVE: This valve is designed to prevent system
failures by relieving pressure from the system when the compressed
air reaches a predetermined level. The valve is preset by the manu-
facturer and must not be modified in any way. To verify the valve
is working properly, pull on the ring. Air pressure should escape.
When the ring is released, it will reseat.
PUMP OIL DRAIN: The removal of the drain plug will allow the air
compressor lubricants to be changed. To remove drain plug, turn
counterclockwise.