Troubleshooting Guide - General - Bosch GCM18V-12SD Operating/Safety Instructions Manual

Troubleshooting Guide - General

PROBLEM
Head assembly does not
bevel to desired position.
Blade hits table.
Angle of cut not accurate.
Cannot rotate table to
change miter angle.
Head assembly will not fully
raise or blade guard will not
fully close.
Blade binds, jams, burns
wood.
Rough cuts.
Head assembly slides for-
ward and back when making
a chop cut.
16099221PH GCM18V-12SD OSI 20220506.indd 55
Troubleshooting
CAUSE
1. Bevel detent pin is
engaged and locks bevel
angle at 33.9°.
2. Bevel range selector
knob setting limits move-
ment.
Misalignment.
Angle stops at 0° or 45°
need adjustment.
1. Miter lock knob is tight-
ened.
2. Miter detent lever is
engaged with a detent
(slot) in detent plate.
3. Sawdust accumulation.
1. Head assembly lock pin
is engaged.
2. Sawdust accumulation.
3. Sawdust accumulation.
4. Improper operation.
1. Dull blade.
2. Improper blade.
3. Bent blade.
Slide rail lock knob has
been loosened.
-55-
CORRECTIVE ACTION
1. Pull out 33.9° bevel de-
tent pin, then rotate pin
1/4 turn to keep out.
2. Change the position of
the bevel range selector
knob (Fig. 23 on page
25, 33).
Authorized service.
See "Adjustments" on page
22.
1. Turn miter lock knob
counterclockwise to
loosen.
2. Disengage detent system
from detent slot. See
"Miter Detent Override"
on page 36.
3. Vacuum or blow out
dust around turntable.
Wear eye protection.
1. Pull out the head as-
sembly lock pin, allowing
head assembly to go up.
See "To Disengage the
Head Assembly Lock
Pin" on page 22.
2. Clean head assembly.
3. Authorized service.
1. See "Saw Operations"
starting on page 35.
2. Replace or sharpen
blade.
3. Replace with 12"
(305mm) diameter blade
designed for material
being cut.
4. Replace blade.
Tighten the slide rail lock
knob (Fig. 40 on page 35,
7) by turning it clockwise.
5/6/22 12:16 PM