Harbor Freight Tools 37793 - Manual (Page 12)

Page 12 For technical questions, please call 1-800-444-3353. Item 37793
SAFET
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O
PERA
TION
M
AINTENAN
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E
SETUP
Maintenance and Servicing
Procedures not specifically explained in this manual must
be performed only by a qualified technician.
TO PREVENT SERIOUS INJURy TO PREVENT SERIOUS INJUR TO PREVENT SERIOUS INJUR FROM A yy ccIDENTAL OPERATION:
Make sure that the Trigger is in the off-position and unplug the tool from its
electrical outlet before performing any procedure in this section.
TO PREVENT SERIOUS INJURy TO PREVENT SERIOUS INJUR TO PREVENT SERIOUS INJUR FROM TOOL FAILURE: yy
Do not use damaged equipment. If abnormal noise or vibration
occurs, have the problem corrected before further use.
cleaning, Maintenance, and Lubrication
1. BEFORE EAcH USE, inspect the general
condition of the tool. Check for:
• loose hardware,
• misalignment or binding of moving parts,
• damaged cord/electrical wiring,
• cracked or broken parts, and
• any other condition that may
affect its safe operation.
2. AFTER USE, wipe external surfaces
of the tool with clean cloth.
3. If any cracks appear on the
Chip Deflector (53), replace immediately.
4. For bit changing instructions
see Tool Set Up on page 9.
5. WARNING! If the supply cord of this
power tool is damaged, it must be replaced
only by a qualified service technician.
Troubleshooting
Problem Possible causes Likely Solutions
Tool will not start. 1. Cord not connected.
2. No power at outlet.
3. Tool’s thermal reset breaker
tripped (if equipped).
4. Internal damage or wear.
(Carbon brushes or Trigger, for example.)
1. Check that cord is plugged in.
2. Check power at outlet. If outlet is unpowered, turn off tool
and check circuit breaker. If breaker is tripped, make sure
circuit is right capacity for tool and circuit has no other loads.
3. Turn off tool and allow to cool. Press reset button on tool.
4. Have technician service tool.
Tool operates slowly. 1. Forcing tool to work too fast.
2. Extension cord too long or cord diameter
too small.
1. Allow tool to work at its own rate.
2. Eliminate use of extension cord. If an extension cord is needed,
use one with the proper diameter for its length and load.
See Extension Cords in Cords Cords Grounding section on page 6.
Performance decreases
over time.
1. Carbon brushes worn or damaged.
2. Bit dull or damaged. 1. Have qualified technician replace brushes.
2. Keep bits sharp. Replace as needed.
Excessive noise
or rattling.
Internal damage or wear.
(Carbon brushes or bearings, for example.)
Have technician service tool.
Overheating. 1. Forcing tool to work too fast.
2. Bit dull or damaged.
3. Blocked motor housing vents.
4. Motor being strained by long or
small diameter extension cord.
1. Allow tool to work at its own rate.
2. Keep bits sharp. Replace as needed.
3. Wear ANSI-approved safety goggles and
NIOSH-approved dust mask/respirator while blowing
dust out of motor using compressed air.
4. Eliminate use of extension cord. If an extension cord is needed,
use one with the proper diameter for its length and load.
See Extension Cords in Cords Cords Grounding section on page 6.
Follow all safety precautions whenever diagnosing or servicing the tool.
Disconnect power supply before service.