Oregon Qualcast PC40 Operation And Maintenance Manual page 18

Maintenance
Maintenance instructions
TO LUBRICATE SPROCKET TIP:
WARNING: Wear heavy duty work gloves when handling the bar and chain.
1. Press the STOP switch down.
NOTE: It is not necessary to remove the saw chain to lubricate the guide bar sprocket tip. Lubrication
can be done on the job.
2. Clean the guide bar sprocket tip.
3. Using the Lube Gun (optional), insert needle nose into the lubrication hole and inject grease until it
appears at outside edge of sprocket tip (Fig. 20).
4. Rotate saw chain by hand. Repeat lubrication procedure until the entire sprocket tip has been
greased.
Fig. 20
GUIDE BAR MAINTENANCE:
Most guide bar problems can be prevented merely by keeping the chainsaw well maintained.
Insuf cient guide bar lubrication and operating the saw with chain that is TOO TIGHT will contribute to
rapid bar wear.
To help minimize bar wear, the following guide bar maintenance procedures are recommended.
WARNING:
maintenance when the engine is hot.
CHAIN SHARPENING:
Chain sharpening requires special tools to ensure that cutters are sharpened at the correct angle and
depth. For the inexperienced chainsaw user, we recommend that the saw chain be professionally
sharpened by the nearest professional Service Center. If you feel comfortable sharpening your own
saw chain, special tools are available from the professional Service Center. For non-experienced
users of the chainsaw, we recommend to have the chain sharpened by a specialist in any authorised
service centre.
WARNING: An incorrectly sharpened chain increases the risk of kickback.
1. To sharpen the saw chain, use the suitable sharpening tools:
- Round chain le ø5/32"(4mm).
- File leading
- Chain measuring calibre.
These tools can be bought in any specialsed stores.
2. To gain well shaped sawdust particles, use sharp chain. If there appears wooden powder, you
must sharpen the saw chain.
WARNING: All cutting teeth must be of a similar length. Different length of the teeth can cause rough
run of the chain or its rupture, as well.
3. Minimum length of the teeth must be 4mm. If they are shorter, remove the saw chain.
4. Angles, which the teeth are under, must be followed.
5. To sharpen the chain basically, make 2 to 3 pulls of the le from the inside out.
WARNING: After you have sharpened the cutter teeth 3 to 4 times, have the saw chain sharpened by
an authorised dealer. They will also sharpen the depth of the limiter , which provides the distance.
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Always wear protective gloves during maintenance operations. Do not carry out
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