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Dolmar PS-420 User Manual

Page 23

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2

6

8

2

9

3

2 10

STOP

2

4

Pull the chain (6) around the sprocket nose (8) of the guide

bar in the direction of the arrow.

Replace the sprocket guard (3).

IMPORTANT:
Lift the saw chain over the chain catcher (9).

Tighten the nuts (2) only hand-tight to begin with.

Tensioning the saw chain

Turn the QuickSet chain tensioner (10) to the right (clockwise)

using the combination tool, until the saw chain guide elements

engage in the guide groove on the bottom of the guide bar (if

necessary, pull the chain into position slightly).
Raise the tip of the guide bar slightly and turn the chain tensioner

(10) further until the saw chain is flush against the bottom of the

guide bar (see circle).
While still holding up the tip of the guide bar, tighten the retaining

nuts (2) with the universal wrench.
NOTE: If the guide bar has been turned over, turn the chain

tensioner to left (i.e. counter-clockwise) to tighten the chain.

Checking the chain tension

The tension of the chain is correct if the chain rests against

the bottom side of the guide bar and can still be easily turned

by hand.
While doing so the chain brake must be released.
Check the chain tension frequently - new chains tend to get

longer during use!
When checking the chain tension the engine must be switched

off.
NOTE: It is recommended to use 2- chains alternatively.
In order to guarantee uniform wear of the guide bar the bar

should be turned over whenever replacing the chain.

Retensioning the saw chain

Use the combination tool to loosen the fastening nuts (2)

about one turn. Raise the tip of the guide bar slightly and turn

the QuickSet chain tensioner (10) to the right (clockwise) until

the saw chain is again flush against the bottom of the guide

bar (see circle).
While still holding up the tip of the guide bar, tighten the retaining

nuts (2) with the universal wrench.