Maintenance; Storage - Craftsman 921.164780 Owner's Manual

Maintenance
NOTE:
Any service procedure not covered in the
maintenance schedule should be performed by
qualified service personnel.
The air compressor should be turned off, unplugged
from the power source, air bled from the tank and
allowed time to cool before any maintenance is
performed.
Check the safety valve by performing these three steps:
1. Plug the compressor in and run until shut-off
pressure is reached.
2. Wearing safety glasses, pull out on the safety valve
ring to release pressure from the tank.
3. The safety valve should close automatically at
approximately at 40-50 PSI. If the safety valve does not
allow air to be released when you pull out on the ring, or
does not close automatically, it must be replaced.
Do not attempt to remove or adjust the safety valve.
From time to time, the air filter needs to be removed and
cleaned.
1. Turn the air compressor off.
2. Unplug the air compressor.
3. Turn the air filter cover counterclockwise to remove.
4. Remove air filter from air filter housing.
5. Blow compressed air through the air filter for
10-15 seconds.
items to Check/Change
Check Tank Safety Valve
Overall Unit Visual Check
Check Air Filter
Drain Tank
i Check Power Cord for Damage
Change Oil
i Check Oil Level
Before each use
or daily
X
X
X
X
X
after first 50 hours
after every 100 hours
X
NOTE: The motor will automatically restart without
warning if the unit is left plugged in to an outlet with the
Auto/Off switch in the on position.
To ensure efficient operation and longer life of the
air compressor unit, a routine maintenance schedule
should be followed. The following schedule is geared
toward a consumer whose compressor is used in a
normal working environment on a daily basis.
This compressor is equipped with an automatic reset
thermal overload protector which will shut off motor if it
becomes overheated. If the thermal overload protector
is actuated, the motor must be allowed to cool down
before start-up is possible.
For more details, see Troubleshooting Guide (page 7).
Storage
For storing the air compressor, be sure to do the following:
1. Turn the unit off and unplug the power cord from the
receptacle.
2. Remove all air hoses, accessories, and air tools from
the air compressor.
3. Perform the daily maintenance schedule.
4. Open the drain valve to bleed all air from the tank.
5. Close the drain valve.
6. Store the air compressor in a clean and dry location.