GreenWorks 20612, Руководство пользователя, Страница: 25 / 36

25
MAINTENANCE
REPLACING THE BAR AND CHAIN (See Figure 16-19)
W A R N I N G
To avoid possible serious injury, stop the motor and remove the battery from the pole saw
before replacing the bar, chain, or performing any maintenance operation.
•
Remove the lock bolt and drivecase cover.
•
The bar contains a bar stud slot that fits over the bar stud. The bar also contains a chain
tensioning pin hole which fits over the chain tensioning pin.
• Place the bar onto the bar stud so that the chain tensioning pin fits into the chain tensioning
pin hole.
•
Fit the chain over the sprocket and into the bar groove. The cutters on the top of the bar
should face toward the bar tip, in the direction of the chain rotation.
• Replace the drivecase cover and install the lock bolt. Tighten the bar nut finger tight only. The
bar must be free to move for tension adjustment.
•
Remove all slack from chain by turning the chain tensioning screw clockwise, assuring that
the chain seats into the bar groove during tensioning.
•
Lift the tip of the bar up to check for sag. Release the tip of the bar, and turn the chain
tensioning screw 1/2 turn clockwise.
•
Repeat this process until sag does not exist.
•
Hold the tip of the bar up and tighten the lock bolt securely.
•
Chain is correctly tensioned when there is no slack on the underside of the bar, the chain is
snug, but it can be turned by hand without binding.
NOTE: If chain is too tight, it will not rotate. Loosen the bar nut slightly and turn adjusting screw 1/4 turn coun-
terclockwise. Lift the tip of the bar up and retighten lock bolt.
Fig. 16
Fig. 17
Fig. 19
Fig. 18
Drivecase
Cover
Drivecase
Cover
Chain
Bar
Lock
Bolt
Chain
Tensioning Pin
Bar Stud
Bar Stud Slot
Lock Bolt
Chain
Tensioning
Pin Hole
Sprocket
Lock Bolt
Chain Rotation
Sprocket
Chain
BAR
Chain Tensioning
Screw