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8 1/4-Inch Right Angle Grinder Operator's Manual
Maintenance
LUBRICATION:
An automatic in-line filter-regulator-lubricator is recommended as it increases tool life
and keeps the tool in sustained operation. The in-line lubricator should be regularly
checked and filled with John Deere AT-4003 air tool oil. Proper adjustment of the in-line
lubricator is performed by placing a sheet of paper next to the exhaust ports and
holding the throttle open approximately 30 seconds. The lubricator is properly set when
a light stain of oil collects on the paper. Excessive amounts of oil should be avoided.
In the event that it becomes necessary to store the tool for an extended period of time
(overnight, weekend, etc.), it should receive a generous amount of lubrication at that
time. The tool should be run for approximately 30 seconds to ensure oil has been
evenly distributed throughout the tool. The tool should be stored in a clean and dry
environment.
Recommended lubricants: Use John Deere AT-4003 air tool oil or any other high
grade turbine oil containing moisture absorbent, rust inhibitors, metal wetting agents
and an EP (extreme pressure) additive.
NOTE: The right angle gear assembly needs to be lubricated with an all purpose
grease such as John Deere AT-4003. The fill plug is located on the side of
the angle head assembly. Overfilling will slow down tool and also result in
grease leakage around the head.
Operation
PRE-OPERATION:
Before the tool is connected to the air supply, clear the air hose of accumulated dust
and moisture. Before removing a tool for service or changing accessories, make sure
the air line is shut-off and drained of air. This will prevent the tool from operating if the
throttle is accidentally engaged.
OPERATION:
Designed for use with mounted stones and burrs with a 1/4" mandrel rated at 25,000
RPM or higher. This tool has a lock-off lever throttle and an internal regulator. To
begin operation, grip tool and depress safety lock while engaging throttle. The built-in
regulator is located opposite the throttle lever, and will rotate fully and allows speed
adjustment of the tool.
To mount stones and other accessories, use the wrenches supplied with the tool.
Always disconnect air supply before changing any accessories. Hold spindle with one
wrench (11mm), while using the other wrench (19mm) to turn collet nut. Fully insert
mandrel into chuck and tighten until secured in collet.
Daily, before use, with no accessory, check spindle speed. Tighten spindle attach-
ments securely. The grinder should be gradually applied to the work surface until the
stone or burr becomes warm. Make smooth contact with the work and avoid any
bumping action or excessive force.
CAUTION: ONLY USE MOUNTED GRINDING STONES
OR BURRS RATED AT TOOL RPM OR
HIGHER. NEVER OPERATE TOOL
WITHOUT WEARING PROPER
PROTECTIVE GEAR.