Astro Pneumatic 29 Gallon Belt Driven Air Compressor 68127 - Manual (Page 16)

MAINTENANCE
A WARNING:
When servicing, use only identical Harbor Freight Tools
replacement parts. Use of any other parts may create a
hazard or cause product damage.
dk WARNING:
Always wear safety goggles or safety glasses with side
shields during power tool operation or when blowing
dust. If operation is dusty, also wear a dust mask.
dk WARNING:
Always release all pressure, disconnect from power
supply, and allow unit to cool to the touch before
cleaning or making repairs on the air compressor.
GENERAL MAINTENANCE
Humidity in the air causes condensate to form in the air
tank. This condensate should be drained daily and/or
every hour, using the instructions found in Draining the
Tank .
The safety valve automatically releases air if the air
receiver pressure exceeds the preset maximum. Check
the safety valve before each use following the instructions
found in Checking the Safety Valve .
Inspect the tank yearly for rust, pin holes, or other
imperfections that could cause it to become unsafe.
Avoid using solvents when cleaning plastic parts. Most
plastics are susceptible to damage from various types of
commercial solvents and may be damaged by their use.
Use clean cloths to remove dirt, dust, oil, grease, etc.
dk WARNING:
Do not at any time let brake fluids, gasoline, petroleum-
based products, penetrating oils, etc., come in contact
with plastic parts. Chemical can damage, weaken or
destroy plastic which may result in serious personal
injury. Electric tools used on fiberglass material, wall­
board, spackling compounds, or plaster are subject
to accelerated wear and possible premature failure
because the fiberglass chips and grindings are highly
abrasive to bearings, brushes, commutators, etc.
Consequently, we do not recommend using this tool for
extended work on these type of materials. However, if
you do work with any of these materials, it is extremely
important to clean the tool using compressed air.
CHECK THE OIL LEVEL AT REGULAR INTERVALS
See Figure 13.
Place the compressor on a level and straight surface. The
oil level must be between the two marks MAX and MIN on
the oil sight glass (fig. 13).
Changing the oil: use SAE 40 oil (for cold climates,
SAE 20 is recommended). Do not mix different grade
oils. If the oil changes color (whitish = presence of water;
dark = overheated), it is good practice to replace the oil
immediately.
It should be refilled for the first time after 100 hours of
operation. Thereafter the oil should be drained and refilled
after every 300 hours in service.
CHANGING THE OIL
See Figures 13 - 14.
Switch off the engine and pull the mains plug out of the
socket. After releasing any air pressure you can unscrew
the oil drain plug (fig. 13) from the compressor pump. To
prevent the oil from running out in an uncontrolled manner,
hold a small metal chute under the opening and collect the
oil in a vessel. If the oil does not drain out completely, we
recommend tilting the compressor slightly.
Dispose of the old oil at a drop-off point for old oil.