9
AIR PReSSuRe AND Volume
The recommended air pressure for this pneumatic angle grinder is 90 PSI.
The most important factor in running this angle grinder is the volume of
air being supplied to the angle grinder. The volume is the air consumption
needed to run this angle grinder at a constant speed under light downward
hand pressure. The volume is measured in CFM (cubic foot per minute (ft
3
/
min)). Alpha
®
recommends running the tool at the maximum flow volume
of 33 CFM to get the full 1.4 HP rating out of the angle grinder.
It is also very important to keep your air cool, dry, and clean, so look for
a compressor with a refrigerated dryer and high-efficiency filter built-in or
purchase a separate air dryer and filter unit rated for your compressor’s
CFM.
(See page 11 for Alpha
®
Filter/Regulator Manifold System)
RuSt PRoteCtIoN (A rust inhibitor oil is used to protect the tool
from rusting when not in use)
PRoPeR CARe AND mAINteNANCe ARe ImPoRtANt FACtoRS IN
PReVeNtING thIS tool FRom RuStING oN the INSIDe WheN
Not IN uSe.
At the end of each workday, place 4-5 drops of rust inhibitor oil (included
with each angle grinder) into the tool using the oil port. Depress the throttle
lever varying the speed from very low to half speed, for thirty seconds. This
will allow the oil to transition into the rotor assembly and coat the inside of
the tool.
CleANING the RotoR ASSembly
Over time, the rotor assembly can fill up with oil sludge, vane dust residue,
and contamination and will need to be cleaned. To accomplish this, remove
the muffler assembly from the tool to allow the waste to exit. You can hold a
paper towel over the exit port to reduce the sound level and catch the exiting
waste. Add 10 to 20 drops of oil to the oil port and run the tool varying the
speed from very slow to half speed, for two to three minutes to allow the
oil to process through the machine. Check the paper towel for exit waste,
continue until there is little to no exit waste.
Run the tool at its slowest speed.
If the tool sounds like it is running with
a variation in speed, this is an indication that one of the vanes is still stick-
ing in the rotor. Repeat the process to see if this will correct the variation
in sound. If the problem continues, contact an authorized Alpha
®
Repair
Center for routine repair and maintenance.
