Graco G Series User Manual

8 307026
Operation
Corrosion Protection for Pump Lubrication
If you are not using an accessory air line lubricator,
manually lubricate the motor daily. Disconnect the air
regulator, place about 15 drops of light machine oil in the
pump air inlet, reconnect the regulator and turn on the air
supply to blow oil into the motor.
Troubleshooting
1. Relieve the pressure.
2. Check all other possible remedies before
disassembling the pump.
CAUTION
Water, or even moist air, can cause your pump to
corrode. To help prevent corrosion, NEVER leave the
pump filled with water or air. After normal flushing, flush
the pump again with mineral spirits solvent (also called
white spirits) or oil-based solvent, relieve pressure, and
leave the mineral spirits solvent (also called white
spirits) in the pump. Be sure to follow the Pressure
Relief Procedure Warning at left.
WARNING
To reduce the risk of serious injury whenever you are
instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 7.
PROBLEM CAUSE SOLUTION
The pump fails to operate. Dirty or worn air motor. Clean, service; see the separate
motor manual 307851.
Inadequate air supply or restricted
lines.
Clean lines or increase the air supply
(see Technical Data).
Closed or clogged air valves. Open or clear the valves.
Clogged fluid hose or valve. Clear the hose or valves.
Worn or damaged valves or seals. Service the valves or seals.
The pump operates, but the output is
low on both strokes.
Clogged fluid hose or valve. Clear the hose or valves.
Exhausted fluid supply. Refill the fluid supply and reprime the
pump.
Worn or damaged valves or seals. Service the valves or seals.
The pump operates, but the output is
low on the downstroke.
Held open or worn intake valve. Clear or service the valve.
Worn or damaged valves or seals. Service the valves or seals.
The pump operates, but the output is
low on the upstroke.
Held open or worn piston valve. Clear or service the valve.
Worn or damaged valves or seals. Service the valves or seals.
Erratic or accelerated operation. Exhausted fluid supply. Refill the fluid supply and reprime the
pump.
Broken air motor compression spring. Replace the spring.

Graco G Series Specifications

General

Series	G Series
Mounting Type	DIN Rail
Input Voltage	24 V DC
Enclosure Rating	IP20
Type	Controller
Communication	Ethernet