Graco AirMax 1310G, Instructions Manual

8 

 Component Identification

SAFETY RELIEF VALVE:  This valve is designed to pre-
vent system failures by relieving pressure from the sys-
tem when the compressed air reaches a predetermined 
level.  The valve is preset by the manufacturer 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 reset.  

PILOT VALVE:  When the toggle is in the upright posi-
tion, all air from the air compressor is vented through 
the discharge muffler.  This gives an easy start feature.  
For normal operation, the toggle is in the 90° position.      

AIR INTAKE FILTER:  This filter is designed to clean air 
coming into the pump.  To ensure the pump continu-
ally receives a clean, cool, dry air supply this filter must 
always be clean and ventilation opening free from ob-
structions.  Replace filter element when necessary.

OIL FILL PORT/VENT:  Pour oil into the Oil Fill Port/Vent 
when required.

OIL SIGHT GLASS:  The Oil Sight Glass displays the oil 
level in the pump.  The oil level should be at the center 
of the Oil Sight Glass.  If low, add SAE 30W non-deter-
gent oil.

AIR COMPRESSOR PUMP (Single Stage):  To compress 
air, the pistons move up and down in the cylinders.  On 
the downstroke, air is drawn in through the air intake 
valves while the exhaust valves remain closed.  On the 
upstroke, air is compressed, the intake valves close 
and compressed air is forced out through the exhaust 
valves, into the discharge line, through the pilot valve 
and into the air tank.

AIR COMPRESSOR PUMP (Two Stage): A two stage 
compressor pump uses two different size cylinders with 
the intake valve of the second smaller cylinder linked 
to the exhaust valve of the first larger cylinder.  On the 
down stroke of the large cylinder, air is drawn through 
the intake valve while the exhaust valve remains closed. 
On the upstroke, air is compressed, the intake valve 
closes and compressed air is forced out through the ex-
haust valve, into the inter cooler and through the intake 
valve of the second smaller cylinder on its down stroke.  
On the upstroke of the smaller cylinder, the intake valve 
closes and the compressed air is compressed a second 
time and forced out the exhaust valve into the discharge 
line, through the tank check valve and into the air tank.

AIR TANK PRESSURE GAUGE:  The air tank pressure 
gauge indicates the reserve air pressure in the air tank (s).

PRESSURE REGULATOR:  The air pressure coming 
from the air tank is controlled by the regulator knob.  
Turn the pressure regulation knob clockwise to increase 
discharge pressure, and counterclockwise to decrease 
discharge pressure.

OUTLET PRESSURE GAUGE:  The outlet pressure 
gauge indicates the air pressure available at the outlet 
side of the regulator.  This pressure is controlled by 
the regulator and is always less or equal to the air tank 
pressure.

AIR TANK DRAIN VALVE:  The drain valve is used to 
remove moisture from the air tank(s) after the air com-
pressor 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 coun-

terclockwise.  

OIL FILL PORT

OIL SIGHT GLASS

Model 1310G

Model 1720G