Craftsman CMHT77629, User Manual

14

E

Maintenance

• When the laser is not in use, clean the exterior parts 

with a damp cloth, wipe the laser with a soft dry cloth 
to make sure it is dry, and then store the laser in the 
kit box provided.

• Although the laser exterior is solvent resistant, NEVER 

use solvents to clean the laser.

• Do not store the laser at temperatures below -5 ˚F 

(-20 ˚C) or above 140 ˚F (60 ˚C).

• To maintain the accuracy of your work, check the laser 

often to make sure it is properly calibrated.

• Calibration checks and other maintenance repairs may 

be performed by CRAFTSMAN service centers.

Troubleshooting

The Laser Does Not Turn On

• Check the AA batteries to make sure:

• Each battery is installed correctly, according to (+) 

and (–) listed inside the battery compartment.

• The battery contacts are clean and free of rust or 

corrosion.

• The batteries are new, high-quality, name brand 

batteries to reduce the chance of battery leakage.

• Make sure the AA batteries are in proper working 

condition. If in doubt, try installing new batteries.

• When using rechargeable batteries, make sure the 

batteries are fully charged.

• Be sure to keep the laser dry.
• If the laser has been stored in extremely hot 

temperatures, allow it to cool. The laser level will not 
be damaged by using the Power/Transport Lock switch 
before cooling to its proper operating temperature.

The Laser Beams Flash

When in self-leveling mode, the lasers are designed 
to self-level up to an average of 4° in all directions. If 
the laser is tilted so much that the internal mechanism 
cannot level itself (or the laser is not level when in 
manual mode), the laser beams will flash indicating that 
the tilt range has been exceeded.

THE FLASHING BEAMS CREATED BY THE LASER ARE 
NOT LEVEL OR PLUMB AND SHOULD NOT BE USED 
FOR DETERMINING OR MARKING LEVEL OR PLUMB. Try 
repositioning the laser on a more level surface.

The Laser Beams Will Not Stop Moving

The laser is a precision instrument. Therefore, if it is 
not positioned on a stable (and motionless) surface, 
the laser will continue to try to find level. If the beam 
will not stop moving, try placing the laser on a more 
stable surface. Also, try to make sure that the surface is 
relatively flat and level, so that the laser is stable.

Service and Repairs

Note:

Disassembling the laser level will void all 

warranties on the product.

To assure product SAFETY and RELIABILITY, repairs, 
maintenance and adjustment should be performed by 
authorized service centers. Service or maintenance 
performed by unqualified personnel may result in a risk 
of injury. To locate your nearest CRAFTSMAN service 
center, go to 

www.CRAFTSMAN.com

.

Warranty

Go to www.CRAFTSMAN.com for the latest warranty 
information.