Bosch 4212L - Manual (Page 34)

34.
Troubleshooting
Electrical Troubleshooting Guide
of these are: gasoline, carbon tetrachloride, chlori-
nated cleaning solvents, ammonia and household
detergents that contain ammonia.
Care of Blades
Blades become dull even from cutting regular lumber.
If you find yourself forcing the saw forward to cut
instead of just guiding it through the cut, chances are
the blade is dull or coated with wood pitch.
When cleaning gum and wood pitch from blade,
unplug the saw and remove the blade. Remember,
blades are designed to cut, so handle carefully. Wipe
the blade with kerosene or similar solvent to remove
the gum and pitch. Unless you are experienced in
sharpening blades, we recommend you do not try.
Tool Lubrication
Your Bosch tool has been properly lubricated and is
ready to use. It is recommended that tools with gears
be regreased with a special gear lubricant at every
brush change.
Periodically lubricate moving parts with a silicone, or
light oil spray. Do not use grease because it tends to
attract and hold sawdust.
Bearings
All bearings in this tools are lubricated with a suffi-
cient amount of high grade lubricant for the life of the
unit under normal operating conditions. No further
lubrication is required.
PROBLEM
Brake does not stop blade in
about 5 seconds
Motor does not start.
Flash of light from motor endcap
when switch is released.
CAUSE
1. Brushes not seated or lightly
sticking or worn.
2. Motor overheated from use
of dull blade/too heavy of a
blade, not recommended
accessory or rapid on/off
cycling.
3. Blade bolt loose.
4. Other
1. Check that unit is plugged in.
2. Power source fuse or
time delay fuse.
3. Brushes worn.
4. Handle not in usable position.
5. Other.
Normal - brake working properly.
CORRECTIVE ACTION
- Inspect/clean or replace
brushes (see Maintenance
Section).
- Use sharp blade.
- Use a recommended blade.
- Let saw cool down.
- Tighten blade bolt.
- Authorized service
- Plug unit in. Use different
outlet.
- 15-Amp time delay fuse or
circuit breaker.
- See Brush Replacement in
the Maintenance and
Lubrication section.
- Lock handle into one of the
four usable positions.
- Authorized service.