Instruction manual

Air Supply:
The air supply must be turned off and all electrics disconnected before making adjustments on the power feed.
A working pressure of 75 PSI (pounds per square inch at 5.4 kg/cm2) is required. An industrial-type compressor
of at least 5 CFM (cubic feet per minute) is recommended. An additional 3 CFM is required for Spray Mists. A
conveniently located valve should be supplied by the user to shut off the air line. Arms should be raised or
lowered by hand when setting up machine. The machine must use clean, filtered air. The speed of descent of
the saw head will vary if the air pressure varies.
FR:
An Air Filter/Regulator installed ahead of the air inlet to the machine. This system helps prevent foreign mate-
rial from entering the system. The FR is comprised of two different components.
1. The Air Filter Bowl is located on the left side and is provided with an automatic drain. This collects and
then releases foreign matter and condensation collected by the air filter.
2. The Pressure Regulator, which is located on top of the air filter, controls the amount of air pressure allowed
into the system. An operating pressure of 75 PSI @ 5.4 kg/cm2 is required. (This is set at the factory.)
All air cylinders on the saw are “Lubed for Life”; and do not require a lubricator. All A500 series miter saws are
equipped with an air cushion beneath the pivot bracket. When the knob in the front right corner of the table base is
switched on, the resulting cushion of air beneath the pivot bracket facilitates movement of the head to different
mitering positions.
Air Filter/Regulator
Trouble Shooting the Pneumatic System for Downfeed of Saw Head:
If the Air Feed no longer has smooth action, check the Hydrocheck oil level. See separate instructions on
Hydrocheck.. If there is no Speed Control, the Hydrocheck may need oil. Consult factory. If air is leaking
from the bottom of the cylinder, replace Cylinder with Part No. B3P306 or P/N B3P308.
4-Way Valve:
The 4-Way Valve is the main control, five port valve located on the Air Feed Unit. If the saw is sticking in the
up or down position, the spool located in the valve probably is not shifting from side to side as necessary. This
condition is caused by unclean air passing through the system. The internal parts become gummed up, and the
air pressure can no longer shift the spool. A broken spring in the valve is another common cause. A 4-Way
Valve Repair Kit, P/N B3P76 is available for the valve.
Air Hold Down Clamps for the Material:
Both Horizontal Air Vises or Vertical Air Clamps are available and can be purchased as an optional accessory.
These clamps pneumatically hold the material in place when the saw blade is cutting the material. If clamps are
not purchased, the operator MUST HAND HOLD THE MATERIAL. The clamps are controlled by a 3-Way Valve
mounted on the bottom of the Power Feed Unit. When the machine is in the rest position, the Upstroke Stud
contacts the 3-Way Valve, LV1. As soon as the Hand Valve is tripped, the clamps move into position. A manual
shut-off for the clamps is provided should you not want to use the clamps for a particular material.
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