DeWalt DCCS621 - Assembly and Adjustments; Battery Pack; Sprocket Cover

ENGLISH
8
Replacement chain and bar are available from your
nearest
DeWALT servicecenter.
• DCCS621 requires replacement 12” (30cm) chain:
DWO1DT612, service part number N580237.
• DCCS621 requires replacement 12” (30cm) bar:
DWZCSB12, service part numberNA599492.
Replacing the Saw Chain (Fig. A, D, G)

CAUTION: Sharp chain. Always wear protective gloves
when handling the chain. The chain is sharp and can cut you
when it is notrunning.

WARNING: Sharp moving chain. To prevent accidental
operation, ensure the battery is removed from the tool before
performing the following operations. Failure to do this could
result in serious personalinjury.
1. To remove the saw chain
5
, place the saw on a flat,
firmsurface.
2. Remove sprocket cover
6
as described in Installing the
Guide Bar and Saw Chainsection.
3. Rotate the chain tension screw
9
using the flat
screwdriver end of thewrench
17
. Turning the screw
counterclockwise allows the guide bar
4
to recede and
reduces the tension on the chain so that it may beremoved.
4. Wearing protective gloves, grasp the saw chain and lift
the worn saw chain out of the groove in the guidebar.
5. Flip guide bar over every time you replace the chain to
ensure evenwear.
6. Place the new chain in the slot of the guide bar, making
sure the saw teeth are facing the correct direction by
matching the arrow and graphic of the saw chain on the
sprocket cover
6
shown in Fig.F.
7. Follow instructions for Installing the Guide
BarandSawChain.
Adjusting Chain Tension (Fig. A, D–F)
NOTE: Saw chain tension should be adjusted regularly
before eachuse.
1. With the saw still on a firm surface check the saw
chain
5
tension. The tension is correct when the saw
chain snaps back after being pulled 1/8" (3 mm) away from
the guide bar
4
with light force from the middle finger
and thumb as shown in Fig.E. There should be no “sag”
between the guide bar and the saw chain on the underside
as shown in Fig.E.
2. To adjust saw chain tension, loosen bar lock nut
8
.
3. Rotate the chain tension screw
9
located on
the sprocket cover using the flat screwdriver end of
thewrench
17
.
4. Check saw chain tension, adjust ifneeded.
5. Do not over-tension the saw chain as this will lead to
excessive wear and will reduce the life of the guide bar and
sawchain.
6. Once saw chain tension is correct, tighten bar lock
nut
8
untiltight using 6ft. lbs. (8 Nm) oftorque .
7. A new chain stretches slightly during the first few hours
of use. It is important to check the tension frequently (after
removing the battery pack) during the first twohours ofuse.
Installing the Guide Bar and Saw Chain
(Fig. A, B–F)

CAUTION: Sharp chain. Always wear protective gloves
when handling the chain. The chain is sharp and can cut you
when it is notrunning.

WARNING: Sharp moving chain. To prevent accidental
operation, ensure that battery is removed from the tool before
performing the following operations. Failure to do this could
result in serious personalinjury.
If the saw chain
5
and guide bar
4
are packed separately
in the carton, the chain has to be attached to the bar, and
both must be attached to the body of thetool.
1. Place the saw on a flat, firmsurface.
2. Rotate the bar lock nut
8
counterclockwise with the
wrench
17
provided.
3. Remove sprocket cover
6
, and bar lock nut
8
.
4. Wearing protective gloves, grasp the saw chain
5
and
wrap it around the guide bar
4
, ensuring the teeth are
facing the correct direction (Fig.F).
5. Ensure the chain is properly set in the slot around the
entire guidebar.
6. Place the saw chain around the sprocket
18
. While
lining up the slot on the guide bar with chain tensioning
pin
19
, and the bolt
20
, on the base of the tool as shown
in Fig.C.
7. Once in place, hold the bar still, replace sprocket
cover
6
. Install the rear of the sprocket cover first, rotate
it down and make sure the bolt hole on the cover lines up
with the bolt
20
, on the mainhousing.
8. Install the bar lock nut
8
and rotate clockwise with the
wrench
17
provided until snug , then loosen nut one full
turn, so that the saw chain can be properlytensioned.
9. Rotate the chain tensioning screw
9
clockwise to
increase tension as shown in Fig.D. Make sure the saw
chain
5
is snug around the guide bar
4
. Tighten the bar
lock nut
8
untilsnug .
10. Follow the instructions in the section Adjusting
ChainTension.
ASSEMBLY AND ADJUSTMENTS

WARNING: To reduce the risk of serious personal
injury, turn unit off
, set the brake and remove the
battery pack
before making any adjustments or
removing/installing attachments or accessories. An
accidental start‑up can causeinjury.
............. Wear respiratory
protection
............. Wear eye protection
............. Wear hearing
protection
............. Read all documentation
CSPM .......... Cut strokes per minute
............. Do not leave in rain
............ Tip contact can cause
the guide bar to move
suddenly upward and
backward, which can
cause serious injury
............ Contact of the guide
bar tip with any object
should be avoided
........... Rotational direction of
the saw chain
...... Always use two hands
when operating the
chainsaw