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............. 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
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.
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
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
wrench
provided.
17
3. Remove sprocket cover
4. Wearing protective gloves, grasp the saw chain
wrap it around the guide bar
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
lining up the slot on the guide bar with chain tensioning
pin
, and the bolt
19
20
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
, on the main housing.
20
8. Install the bar lock nut
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
increase tension as shown in Fig. D. Make sure the saw
chain
5
is snug around the guide bar
lock nut
8
until snug.
10. Follow the instructions in the section Adjusting
Chain Tension.
8
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
4
are packed separately
8
counterclockwise with the
6
, and bar lock nut
8
.
4
, ensuring the teeth are
18
. While
, on the base of the tool as shown
8
and rotate clockwise with the
9
clockwise to
4
. Tighten the bar
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
tension. The tension is correct when the saw
5
chain snaps back after being pulled 1/8" (3 mm) away from
the guide bar
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
3. Rotate the chain tension screw
the sprocket cover using the flat screwdriver end of
the wrench
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
until tight using 6 ft. lbs. (8 Nm) of torque.
8
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.
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
firm surface.
2. Remove sprocket cover
Guide Bar and Saw Chain section.
3. Rotate the chain tension screw
5
and
screwdriver end of the wrench
counterclockwise allows the guide bar
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
7. Follow instructions for Installing the Guide
Bar and Saw Chain.
Replacement chain and bar are available from your
nearest D
e
• DCCS621 requires replacement 12" (30 cm) chain:
DWO1DT612, service part number N580237.
• DCCS621 requires replacement 12" (30 cm) bar:
DWZCSB12, service part number NA599492.
4
with light force from the middle finger
9
.
17
, place the saw on a flat,
5
as described in Installing the
6
9
17
. Turning the screw
6
shown in Fig. F.
WALT service center.
.
8
located on
using the flat
4
to recede and
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