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For technical questions, please call 1-800-444-3353.
SKU 67501/68740
Checking the Oil
1. Check the oil level before operation. Fill the
Pump Crankcase (39) with premium quality SAE
30-weight, non-detergent air compressor oil.
IMPORTANT: Running the Air Compressor with the
incorrect amount of oil will cause damage
to the equipment and void the warranty. To
prevent damage, do not use with overlled or
low oil. Slowly ll to full line, wait 2 minutes and
ll back up to full line. Compressor has small
passages that will ll slowly.
2.
Oil Sight Glass (33)
Crankcase Cover (31)
Tank (70)
OVERFILL
LOW
FULL
OIL LEVEL
Figure 5
The oil level should be at the center of the “full”
level on the oil level sight glass, as shown in Figure
5. Add oil as needed to maintain this level. Do not
let the oil level go below the center dot (LOW as
shown above) and do not overll the oil so that it is
above the center dot (OVERFILL as shown above)
on the sight glass.
3. To add oil:
a. Remove the Oil Plug (37).
b. Using a funnel to avoid spills, pour enough oil into
the Pump Crankcase (39) to reach the “full” level
in the Oil Sight Glass (33).
c. Replace the Oil Plug.
Cold Weather Operation
Premium quality 30-weight, non-detergent air
compressor oil (sold separately) is recommended
for use with this compressor. Start compressor in
heated area if outdoor temperatures drop below
32° F. If this is not practical, drain out the old
pump oil and use SAE 10W Non-detergent Air
Compressor Oil in the pump crankcase instead
whenever the compressor’s temperature will fall
below 40°. Do not use multi-viscosity oil (such
as 10W-30), they leave carbon deposits on pump
components and lead to accelerated failure. Heavy
operation may require heavier viscosity oil.
4. If uncertain which oil to use for this compressor,
please call Harbor Freight Tools customer service
at 1-800-444-3353 for assistance.
5. Change the compressor oil after the rst hour
of use to remove any debris.
WARNING! To prevent serious injury from burns: Do not
add or change the oil while the compressor is in
operation. Allow the compressor to cool before
replacing oil.