DeWalt DHS790 - MAINTENANCE; Safety Warnings for Maintenance

15
ENGLISH
Fig. FF
Blade
CORRECT
Fence
INCORRECT
Fig. GG
Blade
Fence
Bowed Material (Fig. HH, II)
When cutting bowed material always position it as shown in Figure HH and never like that
shown in Figure II. Positioning the material incorrectly will cause it to pinch the blade near the
completion of thecut.
Fig. HH
CORRECT
Fig. II
INCORRECT
Cutting Plastic Pipe or Other Round Material
Plastic pipe can be easily cut with your saw. It should be cut just like wood and CLAMPED OR
HELD FIRMLY TO THE FENCE TO KEEP IT FROM ROLLING. This is extremely important when
making anglecuts.
Cutting Large Material (Fig. JJ)
Occasionally you will encounter a piece of wood a little too large to fit beneath the lower guard.
If this occurs, simply place your right thumb on the upper side of the guard and roll the guard up
just enough to clear the workpiece, as shown in Figure JJ. Avoid doing this as much as possible,
but if need be, the saw will operate properly and make the bigger cut. NEVER TIE, TAPE, OR
OTHERWISE HOLD THE GUARD OPEN WHEN OPERATING THISSAW.
Fig. JJ
MAINTENANCE

WARNING: To reduce the risk of serious personal injury, turn tool off and remove
the battery packs or power supply before transporting, making any adjustments,
cleaning, repairing, or removing/installing attachments or accessories. An accidental
start-up can causeinjury.

WARNING: To reduce the risk of serious personal injury, DO NOT touch the sharp
points on the blade with fingers or hands while performing anymaintenance.
DO NOT use lubricants or cleaners (particularly spray or aerosol) in the vicinity of the plastic
guard. The polycarbonate material used in the guard is subject to attack by certainchemicals.
• All bearings are sealed. They are lubricated for life and need no furthermaintenance.
• Periodically clean all dust and wood chips from around AND UNDER the base and the
rotary table. Even though slots are provided to allow debris to pass through, some dust
willaccumulate.
Removing and Replacing Belt (Fig.A, KK)
The belt is designed to last the life of the tool. However, abuse of the tool could cause the belt
tofail.
If the blade does not turn when the motor is running, the belt has failed. To inspect or replace
the belt, remove the belt cover screws. Remove the belt cover. Inspect the ribs of the belt for
wear or failure. Check belt tension by squeezing the belt. The belt halves should almost touch
when squeezing firmly with the thumb and index finger. To adjust the tension, loosen, but do not
remove, the four crosshead screws
62
. Then rotate the set screw
63
on the top of the motor
plate casting until the proper tension is achieved. Tighten the four screws securely and replace
the beltcover.
NOTICE: Overtightening the belt will cause premature motorfailure.
Fig. KK
62
63
Cleaning

WARNING: Blow dirt and dust out of all air vents and guard mechanisms (if applicable) with
clean, dry air at least once a week. To minimize the risk of eye injury, always wear approved
eye protection and respiratory protection when performingthisprocedure.

WARNING: Never use solvents or other harsh chemicals for cleaning the non-metallic parts
of the tool. These chemicals may weaken the plastic materials used in these parts. Use a
cloth dampened only with water and mild soap. Never let any liquid get inside the tool; never
immerse any part of the tool into aliquid.