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Model G0471 3 HP Air Compressor
-21-
Figure 15. Oil drain cap screw.
5. Replace the oil drain cap screw and
remove the oil breather fill plug shown
in Figure 16.
Symptom Possible Cause Possible Solution
Air leaks from pressure
switch.
1. Faulty check valve.
2. Faulty pressure switch.
1. Repair the check valve
(see Page 22).
2. Replace pressure switch.
Air is dirty or has exces
-
sive moisture.
1. Tank is not drained.
2. Delivery pipes are dirty.
1. Open drain valve and
make certain all the water
is drained out.
2. Remove delivery pipes,
clean out and replace.
Changing Oil
Change the oil in the air compressor pump
after the initial 50 hours, or 30 days of use;
and every 300 hours, or 3 months after the
first oil change. Use compressor oil or ISO
100/SAE 30W, non-detergent type oil.
To change the oil:
1. Unplug the air compressor and drain
all the air from the tank.
2. Place a container on the floor to catch
the oil, then tip the compressor so the
cap screw shown in Figure 15 is over
the container.
3. Use a hex wrench to remove the oil
drain cap screw shown in Figure 15.
4. Drain all of the oil from the crank case
then tip the compressor upright.
Oil Drain
Cap Screw
6. Fill the crank case with oil until the oil
level is in the center of the sight glass,
then replace the oil breather fill plug.
Figure 16. Oil breather fill plug.
Oil Breather
Fill Plug