MAINTENANCE
CHAIN MAINTENANCE
See Figure 20.
WARNING:
The chain is very sharp; always wear protective gloves when performing maintenance to the chain.
Use only the replacement low kickback chain specified for this unit.
For smooth and fast cutting, the chain needs to be maintained properly. The chain requires sharpening when the wood chips are small and powdery, the chain must be forced through the wood during cutting, or the chain cuts to one side. During maintenance of the chain, consider the following:
Improper filing angle of the side plate can increase the risk of a severe kickback.
� Depth gauge (or raker clearance) setting determines the height the cutter enters the wood and the size of the wood chip that is removed. Too much clearance increases the potential for kickback. Too little clearance decreases the size of the wood chip thus decreasing the chain’s cutting ability.
If cutter teeth have hit hard objects such as nails and stones, or have been abraded by mud or sand on the wood, have service dealer sharpen chain.
HOW TO SHARPEN THE CUTTERS
See Figures 21 - 24.
WARNING:
Improper chain sharpening increases the potential of kickback. Failure to replace or repair damaged chain can cause serious injury.
Be careful to file all cutters to the specified angles and to the same length, as fast cutting can be obtained only when all cutters are uniform.
Tighten the chain tension enough that the chain does not wobble. Do all of your filing at the
Use a 5/32 in. diameter round file and holder.
Keep the file level with the top plate of the tooth. Do not let the file dip or rock.
Using light but firm pressure, stroke towards the front corner of the tooth. Lift file away from the steel on each return stroke.
Put a few firm strokes on every tooth. File all left hand cutters in one direction. Then move to the other side and file the right hand cutters in the opposite direction. Occa- sionally remove filings from the file with a wire brush.
DEPTH GAUGE SETTING
Fig. 20
PARTS OF A CUTTER
CUTTING CORNER
TOP PLATE | SIDE PLATE | |
| ||
RIVET HOLE | DEPTH GAUGE | |
| ||
HEEL | TOE | |
GULLET | ||
Fig. 21 |
Fig. 22
Fig. 23
LEFT HAND
CUTTERS
RIGHT HAND
CUTTERS
Fig. 24
14
