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BAR MAINTENANCE
The bar is worn as well as the chain. It is necessary to lubricate it and tension the chain properly
for proper operation and long life of the bar. Check that the sprocket rotates freely, that
the lubrication groove and the lubrication hole are not clogged. Clean them in case of clogging.
During the chain a burr is created on the bar which must be removed from time to time with
a flat file.
After each dismantling, turn the bar upside down (the bar label is for advertising purposes only
and does not specify the side of the bar). Lubricate the sprocket in the bar through the lubrication
hole at the tip after rotating it (fig. 16 a).
Note: I
Excessive wear of the bar on the underside, in the area behind the sprocket, is a sign
of a chain that is too loose.
BAR AND CHAIN DISCARDING
The chain must be discarded if its teeth are worn down to a length of less than 4 mm.
The bar is usually discarded with every other worn chain.
SPROCKET
Two types of sprockets can be used in the chainsaw.
• With a solid chain ring which is part of the clutch drum.
• With removable chain ring.
The sprocket must be replaced in case of excessive wear. The exchangeable, chain ring should
be changed every time the chain is replaced.
SPROCKET BEARING
• The sprocket needle bearing should be regularly lubricated with high-quality lubricating
grease.
REGULAR MAINTENANCE (AFTER EACH USE)
1. Check, clean the clutch and safety brake belt
• Remove the clutch cover.
• Remove chips, resin and dirt from the chain brake, clutch drum and its cover. (e.g. by brush)
• Check that the thickness of the brake belt at the most used location is at least 0.6 mm. If
the brake belt is worn (thickness less than 0.6 mm), have it replaced by a specialized service
centre.
2. Guide bar and chain
• Remove the bar and chain.
• Remove sawdust and dirt from the bat groove and from the bar lubrication hole
HECHT_925_R_MANUAL_2022_EN.indd 34HECHT_925_R_MANUAL_2022_EN.indd 34 28.03.2023 11:58:0428.03.2023 11:58:04
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