Maintenance; Replacing Carbon Brushes; Lower Blade Guard; Lubrication - Craftsman 137.212150 Operator's Manual

MAINTENANCE
DANGER
Never put lubricants on the blade while it is spinning.
To avoid fire or toxic reaction, never use gasoline,
naphtha acetone, lacquer thinner or similar highly
volatile solvents to clean the miter saw.
To avoid injury from unexpected starting or electrical
shock, unplug the power cord before working on the
saw.
For your safety, this saw is double-insulated. To avoid
electrical shock, fire or injury, use only parts identical to
those identified in the parts list. Reassemble exactly as
the original assembly to avoid electrical shock.
REPLACING CARBON BRUSHES (FIG. GG)
The carbon brushes furnished will last approximately 50
hours of running time, or 10,000 ON/OFF cycles.
Replace both carbon brushes when either has less than
1/4" length of carbon remaining, or if the spring or wire
is damaged or burned. To inspect or replace brushes,
first unplug the saw. Then remove the black plastic cap
(1) on the side of the motor (2). Remove the cap
cautiously, because it is spring-loaded. Then pull out
the brush and replace. Replace the other side in the
same manner. To reassemble, reverse the procedure.
The ears on the metal end of the assembly go in the
same hole the carbon part fits into. Tighten the cap
snugly, but do not overtighten.
NOTE: To reinstall the same brushes, first make sure
the brushes go back in the way they came out. This will
avoid a break-in period.
Fig. GG
LOWER BLADE GUARD
Do not use the saw without the lower blade guard. The
lower blade guard is attached to the saw for your
protection. Should the lower guard become damaged,
do not use the saw until the damaged guard has been
replaced. Develop a regular check to make sure the
lower guard is working properly. Clean the lower guard
of any dust or buildup with a damp cloth.
CAUTION: Do not use solvents on the guard. They
could make the plastic "cloudy" and brittle.
When cleaning the lower guard, unplug the saw from
the power source receptacle to avoid unexpected
startup.
SAWDUST
Periodically, sawdust will accumulate under the work
table and base. This could cause difficulty in the
movement of the worktable when setting up a miter cut.
Frequently blow out or vacuum up the sawdust.
If blowing sawdust, wear proper eye protection to keep
debris from entering eyes.
LUBRICATION
All the motor bearings in this tool are lubricated with a
sufficient amount of high grade lubricant for the life of
the unit under normal operating conditions; therefore,
no further lubrication is required.
Lubricate the Following as Required:
Chop pivot: light machine oil or aerosol will penetrate
from the ends of the junction points. A qualified service
technician can remove the pivot upstop to relieve
tension, and the 2 metric set screws holding the shaft,
in order to drive the shaft about 3/4" right. Exposed
surfaces are lubricated with automotive type oil.
Central pivot of plastic guard: Use light household oil
(sewing machine oil ) on metal-to-metal or
metal-to-plastic guard contact areas as required for
smooth, quiet operation. Avoid excessive oil, to which
sawdust will cling.
Link: (which actuates the lower guard movement) may
be oiled at the rear pivot, greased at ball bearing
contact, and oiled where the link actuates the acetyl
roller of the lower guard, if the down chop motion is
hard to start.