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• To avoid injury from an accidental start, turn the switch OFF and remove the plug from the power source before making
any adjustments.
• All electrical or mechanical repairs should be done only by qualified service technicians. Contact Hitachi Authorized
Service Center.
GENERAL
English
– 19 –
TROUBLESHOOTING GUIDE
PROBABLE CAUSE
1. Incorrect belt tension.
2. Loose spindle pulley.
3. Loose motor pulley
1. Incorrect speed.
2. Chips not coming out of hole.
3. Dull drill bit.
1. Hand grain in wood or lengths of cutting
flutes and/or angles not equal.
2. Bent drill bit..
1. No backup material under workpiece.
1. Not supported or clamped properly.
1. Workpiece pinching drill bit, or excessive
feed pressure.
2. Improper belt tension.
1. Bent drill bit.
2. Worn bearings.
3. Drill bit not properly installed in chuck.
4. Chuck not properly installed.
1. Spring has improper tension.
1. Dirt, grease, or oil on the tapered inside
surface of chuck or on the spindle’s
tapered surface.
1. The batteries have become uncharged.
PROBLEM
Noisy operation
Drill bit burns.
Run out of drill bit point - drill
hole not round.
Wood splinters on underside.
Workpice torn loose from hand.
Drill bit binds in workpiece.
Excessive drill bit runout or
wobble.
Quill returns too slow or too
fast.
Chuck will not stay attached to
spindle. It falls off when trying
to install.
The LASER GUIDE will not
turn on.
REMEDY
1. Adjust tension. See DRILL PRESS
ADJUSTMENTS section, BELT TENSION.
2. Check tighteness of retaining nut on pulley, and
tighten if necessary
3. Tighten set screw in motor pulley.
1. Change speed. See BASIC DRILL PRESS
OPERATIONS section, SPEEDS AND BELT
PLACEMENT.
2. Retract drill frequently to clear chips.
3. Resharpen drill bit.
1. Resharpen drill bit correctly.
2. Replace drill bit.
1. Use backup material. See BASIC DRILL PRESS
OPERATIONS section.
1. Support workpiece or clamp it. See BASIC DRILL
PRESS OPERATIONS section.
1. Support workpiece or clamp it. See BASIC DRILL
PRESS OPERATIONS section.
2. Adjust tension. See DRILL PRESS
ADJUSTMENTS section, BELT TENSION.
1. Replace drill bit.
2. Replace bearings.
3. Install drill properly. See BASIC DRILL PRESS
OPERATIONS section, INSTALLING DRILL BIT.
4. Install chuck properly. See ASSEMBLY
INSTRUCTIONS section, INSTALLING THE
CHUCK.
1. Adjust spring tension. See ASSEMBLY
INSTRUCTIONS section, QUILL RETURN
SPRING.
1. Using a household detergent, clean the tapered
surface of the chuck and spindle to remove all dirt,
grease and oil. See ASSEMBLY INSTRUCTIONS
section, INSTALLING THE CHUCK.
1. See ASSEMBLY INSTRUCTIONS section,
INSTALLING BATTERY FOR LASER GUIDE.
WARNING