Dolmar PS-7900 - Manuel (Page 30)

30
12
16
15
14 13
17
Replacing the saw chain
CAUTION: Use only chains and guide bars designed for
this saw (see the Extract from the spare-parts list)!
Check the sprocket before mounting a new chain.
Worn out sprockets (12) may damage the new chain and must
therefore be replaced.
Remove the sprocket guard (1) (See "PUTTING INTO OPE-
RATION" figs. B).
Remove the chain and guide bar.
Remove circlip (13).
CAREFUL: The circlip will jump out of the groove unless you
hold it down with your thumb while removing it.
Remove thrust washers (14 and 15).
Replace the old sprocket (12) with a new one (16). For the part
number consult the “Extract from the spare parts list”.
Assemble the new sprocket, thrust washers and circlip.
For replacing the guide bar, chain, and sprocket see "PUTTING
INTO OPERATION A-H".
NOTE:
New chains stretch, so check the chain tension frequently (see
“Checking the chain tension”).
D
C
Replacing the fuel filter
The felt filter (17) can become clogged. It is recommended to
replace the fuel filter once every three months in order to ensure
unimpeded fuel flow to the carburetor.
To remove the fuel filter for replacement, pull it out through
the tank filler neck using a piece of wire. Bent wire at one end
to form a hook.
E
Cleaning the guide bar
CAUTION: Protective gloves must be worn.
Regularly inspect the bearing surfaces of the guide bar for
damage, and clean them with a suitable tool.