Zenoah GZ4350, Operator'S Manual

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If the chain lubrication system is still not working after
carrying out the steps above and associated measures,
contact your servicing dealer.
Chain drive sprocket
The clutch drum is fitted with one of the following drive
sprockets:
• Spur sprocket (the chain sprocket is welded on the
drum) (A)
• Rim sprocket (replaceable) (B)
A B
Perform the following maintenance on the chain drive
sprocket:
• Regularly do a visual check of the degree of wear on
the drive sprocket. Replace the chain drive sprocket
if the wear is excessive.
• Replace the drive sprocket whenever you replace
the saw chain.
To lubricate the needle bearing
Both versions of sprockets have a needle bearing on the
drive shaft, which has to be greased regularly (once a
week).
A B
1. Disengage the chain brake by pulling the front hand
guard against the front handle.
2. Unscrew the two bar nuts and remove the clutch
cover.
3. Lay the product on its side with the clutch drum
facing upwards.
4. Remove the clutch drum and lubricate the needle
bearing using a grease gun. Use a high-quality
bearing grease or engine oil.
To examine the cutting equipment for
wear
Do a visual check of the saw chain daily.
1. Make sure that there are no visible cracks in rivets
and links.
2. Examine wheather the saw chain is stiff.
3. Compare the existing saw chain with a new saw
chain to decide wheather the rivets and links are
badly worn.
4. Replace the saw chain if it exhibits any of the
conditions above.
5. Replace the saw chain when the length of the cutting
teeth has worn down to only 4 mm.
To do a check of the guide bar
Do a check of the guide bar regularly.
1. Examine whether there are burrs on the edges of the
bar. Remove burrs with a file if necessary.
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