Troubleshooting Guide - General - Bosch GCM12SD Operating/Safety Instructions Manual

2610051827 GCM12SD 08-18.qxp_GCM12SD 9/19/18 2:52 PM Page 60
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
forward and back when
making a chop cut.
Bevel angle is not securely
held when bevel lock lever is
pushed.
Glide mechanism is difficult
to move forward and back.
60
Troubleshooting

Troubleshooting Guide - General

CAUSE
1. Bevel detent pin is en-
gaged and locks bevel
angle at 33.9°.
2. Bevel range selector knob
setting limits movement.
Misalignment.
Angle stops at 0° or 45° need
adjustment.
1. Miter lock knob is tight-
ened.
2. Miter detent lever is en-
gaged with a detent (slot)
in detent plate.
3. Sawdust accumulation.
1. Head assembly lock pin is
engaged.
2. Cover plate not tightened
after replacing blade.
3. Sawdust accumulation.
4. Sawdust accumulation.
1. Improper operation.
2. Dull blade.
3. Improper blade.
4. Bent blade.
Mechanism lock lever is
disengaged.
Bevel lock lever needs
tension adjustment.
Glide movement controller
is set too tight.
CORRECTIVE ACTION
- Pull out 33.9° bevel detent
pin, then rotate pin 1/4 turn
to keep out.
- Change bevel range selector
knob position (see page 45).
- Authorized service.
- See Adjustments section
(pages 20-29).
- Turn miter lock knob coun-
terclockwise to loosen.
- Pull up on miter detent lever
to disengage from detent
slot (see page 38).
- Vacuum or blow out dust
around turntable; wear eye
protection.
- Pull out lock pin, allowing
head assembly to go up
(see page 21).
- See Removing and Installing
Blades on pages 16-17.
- Clean head assembly.
- Authorized service.
- See Saw Operations
section.
- Replace or sharpen blade.
- Replace with 12" diameter
blade designed for material
being cut.
- Replace blade.
Pull up on mechanism lock
lever tab to engage
(see page 21).
Increase bevel lock lever
force by adjusting tension nut
(see page 28).
Loosen two screws on the
movement controller (see
page 20).