Maintenance, Danger, Warning – Craftsman 137.21241 User Manual

Page 24

MAINTENANCE

To avoid injury, 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. DD)

Replace both carbon brushes when either has

less than 1/4 in. 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 springloaded. Then pull out the

brush and replace. Replace for the other side.

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 exactly the way they

came out. This will avoid a break-in period that

reduces motor performance and increases wear.

Fig. DD

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.

EMPTYING SAWDUST BAG

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 blowing into

eyes.

LUBRICATION (FIG. EE)

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 bearing

lubrication is required.
Lubricate the following as necessary:
Chop pivot: Apply light machine oil to points

indicated in illustration.
Chop and Central pivot: Apply light machine oil

to points indicated in illustration.

Fig. EE

DANGER

WARNING

Chop pivot

Chop and

central pivot