Craftsman 137.21236 Maintenance, Replacing Carbon Brushes FIG. BB, Lower Blade Guard

MAINTENANCE

MAINTENANCE

!DANGER

To avoid injury, never put lubricants on the blade while it is spinning.

!WARNING

To avoid fire or toxic reaction, never use gasoline, naphtha acetone, lacquer thinner or similar highly volatile solvents to clean the miter saw.

!WARNING

To avoid injury from unexpected starting or electrical shock, unplug the power cord before working on the saw.

!WARNING

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. BB)

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. BB

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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.

!WARNING

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.

!WARNING

If blowing sawdust, wear proper eye protection to keep debris from blowing into eyes.

LUBRICATION (FIG. CC)

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. CC

Central pivot of plastic guard

Chop pivot

2

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