PRETUL 28113, Manual

8

Maintenance

ENGLISH

• We recommend lubricating the tool transmission every 

carbon brush change in a                                 Authorized 

Service Center.

• To guarantee adequate motor cooling, always keep slots 

clean and free of obstructions.

• Regularly inspect all the mounting screws. Double-check 

they are properly tighten. If any screw is loose tighten 

immediately.

• Service should only be made in a                                

Authorized Service Center. Service and maintenance 

performed by non-qualified people may be dangerous and 

lead to personal injuries. It also makes the product 

Warranty void.

Lubrication

Cleaning and care

Carbon brush replacement

Service

• Carbon brushes should be checked periodically.

• When one or both carbon brushes show signs of wear go 

to a                                 Authorized Service center to have 

both carbon brushes replaced. When replaced, see if the 

new carbon brushes move freely in the carbon brush 

housing. Ask to turn on the tool during five minutes to 

make the contact in the carbon brushes and the commuter 

even.

• Use only original                                 spare carbon 

brushes, designed specifically with the right strength and 

electric resistance for each type of motor. Carbon brushes 

with different specifications may damage the motor.

• When replacing carbon brushes, always change both.

Spin Selector Lever

in the Reverse Position

Vise

Phillips

Screwdriver

• Remove the auxiliary handle.

• Open the chuck jaws all the way.

• Using a screwdriver remove the left-threaded safety 

screw with a clockwise movement.

• Fit the long side of an “L” (not included) Allen key in a 

vise.

• Insert the short side of the “L” (not included) Allen key to 

the chuck.  Close the jaws.

• Move the spin selector lever into the reverse position 

(page 7). Fasten the drill firmly and activate the drill. The 

chuck will be released with the turn.

• Set the new chuck turning it into the hammer drill thread 

until it stops.

• Open the jaws fully and thread the screw in a 

counterclockwise position. Tighten with a screwdriver.

Chuck Replacement