Maintenance - DeWalt DCST922 Instruction Manual

20v max* brushless string trimmer
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ENglish
Keep trimmer tilted toward the area being cut; this is the
best cutting area.
The trimmer cuts when passing the unit from the left to
right. This will avoid throwing debris at the operator.
Avoid trees and shrubs. Tree bark, wood moldings, siding,
and fence posts can easily be damaged by the string.

MAINTENANCE

Your D
WALT power tool has been designed to operate
e
over a long period of time with a minimum of maintenance.
Continuous satisfactory operation depends upon proper tool
care and regular cleaning.

WARNING: To reduce the risk of serious personal
injury, turn appliance off and remove battery
before making any adjustments or removing/
installing attachments or accessories. An
accidental start‑up can cause injury.
The charger and battery pack are not serviceable
Maintenance Treatments (Fig. L)
.
Keep the air intake slots 
Your trimmer line can dry out over time. To keep your
line in top condition, store spare line in a plastic, sealable
bag with a tablespoon of water.
Plastic parts may be cleaned by using a mild soap and a
damp rag.
The line cutter on the edge of the guard can dull over
time. It is recommended you periodically touch-up the
sharpness of the blade with a file.
Reloading the Cutting Line (Fig. A, M–O)

WARNING: To reduce the risk of serious personal
injury, turn unit off and remove the battery pack
before making any adjustments or removing/
installing attachments or accessories, when
replacing line, or prior to cleaning. An accidental
start‑up can cause injury.

CAUTION:Use only D
and line. Using any other manufacturer's line can
reduce performance, damage the trimmer or cause
personal injury.
Your trimmer uses 2.0 mm diameter line that is spiral‑
shaped with smooth round edges. Do not use other size
lines. This can degrade performance, cause damage to
the unit or injury.

CAUTION: To avoid appliance damage, if the cutting
line protrudes beyond the trimming blade, cut it off so
that it just reaches the blade.
Use only D
WALT replacement line.
e
1. Remove battery pack 
2. Cut a max of 6 m length of of 2.0 mm trimmer line.
3. Align spool housing eyelets 
the spool grip cover 
 29 
4. Thread one end of the trimmer line through an eyelet.
Guide the line through to the second eyelet and
continue to pull the line through until there are equal
32
clean to avoid overheating.
 22 
WALT replacement spools
e
 12 
.
 26 
with the arrow 
as shown in Figure M.
lengths of string on each side of the spool housing as
shown in Figure N.
5. Secure the spool cap from moving with one hand.
Using your other hand, wind the string onto the spool
by rotating the spool grip cover counterclockwise as
shown in Fig. O. Continue winding until 130 mm of string
remain on each side of the spool housing.
Replacing Spool Assembly (Fig. A, P)
1. Rotate the spool housing 
spindle plate 
housing. Insert a screwdriver through the notch and into
the hole, to prevent the spindle from turning.
2. Unscrew and remove the spool housing by turning the
spool grip cover 
NoTE: Do not try to remove the spool housing by
turning the spool housing.
3. Remove spindle plate 
Remove any dirt and grass from the motor housing and
spindle plate.
4. Install spindle plate 
double D shaped retaining nut on the spindle sits inside
the base of the spindle plate.
5. Align the spindle plate hole and notch, insert a
screwdriver back into the hole and thread the new spool
housing counterclockwise. Securely tighten the new
spool housing onto the spindle 
Replacing Guard (Fig. Q)

WARNING: Never operate appliance without guard
firmly in place.
1. Remove the four guard screws 
2. Attach the new guard as described in the Attaching
Guard section.
Folding for Storage or Transportation (Fig. R)
The string trimmer can be folded for storage or
transportation. To put the string trimmer in the folded
position, please refer to Extending and Folding the Pole.
Cleaning

WARNING: Blow dirt and dust out of all air vents with
clean, dry air at least once a week. To minimize the
risk of eye injury, always wear approved eye 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.
Accessories
 27 
on

WARNING: Since accessories, other than those
offered by D
product, use of such accessories with this tool could
be hazardous. To reduce the risk of injury, only
D
WALT‑recommended accessories should be used
e
with this product.
 10 
until the hole 
 19 
aligns with notch 
 28 
clockwise.
 29 
 19 
before installing a new spool.
onto the spindle 
 19 
 18 
.
 21 
.
WALT, have not been tested with this
e
 25 
in the
in the motor
, so the
 18 

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