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8 4-Inch 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.
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 to use 4" type 27 grinding wheels only. This tool must be operated with the
guard installed on the tool to avoid serious injury. The guard should be positioned so
that the opening in the guard is away from the operator. Any wheel guard that is bent
or damaged must be replaced.
The grinder should be gradually applied to the work surface until the wheel becomes
warm. Make smooth contact with the work and avoid any bumping action or exces-
sive force.
The type 27 grinding wheel is designed to remove material with the face portion of the
wheel. Do not use edge of the wheel to cut material.
This angle grinder is supplied with a lock-off lever to prevent accidental starts. To
begin operation, grip tool and depress the safety lock with thumb then depress throttle
lever.
CAUTION: NEVER OPERATE TOOL WITHOUT GUARD
PROPERLY INSTALLED. DO NOT
OVERTIGHTEN WHEEL NUT OR WHEEL
MAY CRACK.