08/2005
510200020-510230020
22/26
Pneumatic Chain Saw 5 1020/5 1021/5 1022/5 1023
MAINTENANCE AND REPAIRS
Bar Condition
Cause
Worn groove
Wear due to long service.
Shallow groove, narrow running surface
Chain tilted. Cutting teeth damaged on one
side. Drive link tongues worn.
Blueish areas on running surface
Groove compressed in the areas.
Friction of drive links has caused heating
and blue coloration.
Reinforcement chipped
Bar used improperly. Saw jammed in the cut.
Log slid over bar.
Running surface scored
Improper use caused extreme lateral pressure
on the running surface at the bar nose. A
common problem most often caused by log
slippage.
Cavities in bar
Impact of the chain behind the reinforced area
of the bar as a result of the insufficient chain
tension. Dull cutting teeth. Extreme pressure
applied to front area of bar.
Sprocket
A damaged sprocket will ruin your chain. Replace a damaged sprocket immediately; the
cost is only ¼ that of a new chain. It is therefore uneconomical to run new chains on old
sprockets.
Avoid the problems caused by damaged sprocket:
1. Check it each time you mount a new chain, and replace it if it shows signs of wear.
2. Always make sure that the chain tension is sufficient.
