Maintenance - Makita UC3020A Instruction Manual

the trunk diameter. Do not make the scarf too
large. Then make the diagonal cut.
Cut any corrections to the scarf across its entire
width.
006923
Make the back cut a little higher than the base cut
of the scarf. The back cut must be exactly
horizontal. Leave approximately 1/10 of the trunk
diameter between the back cut and the scarf.
The wood fibers in the uncut trunk portion act as a
hinge. Do not cut right through the fibers under
any circumstances, as the tree will otherwise fall
unchecked. Insert wedges into the back cut in time.
Only plastic or aluminum wedges may be used to
keep the back cut open. The use of iron wedges is
prohibited.
Stand to the side of the falling tree. Keep an area
clear to the rear of the falling tree up to an angle of
45 ° either side of the tree axis (refer to the "
felling area " figure). Pay attention to falling
branches.
An escape path should be planned and cleared as
necessary before cuts are started. The escape
path should extend back and diagonally to the rear
of the expected line of fall as illustrated in figure.
1
2
3
2
009202

MAINTENANCE

CAUTION:
Always be sure that the tool is switched off and
•
unplugged before attempting to perform inspection
or maintenance.
Always wear gloves
•
inspection or maintenance.
Never use gasoline, benzine, thinner, alcohol or the
•
like. Discoloration, deformation or cracks may result.
1. Felling direction
2. Danger zone
3. Escape route
3
when performing
Carry out the maintenance work described below at
regular intervals. Warranty claims will be accepted only
if these operations have been performed regularly and
properly.
Only maintenance work described in this instruction
manual may be performed by the user. Any other work
must be carried out by a MAKITA specialist repair shop.
Cleaning the chain saw
Clean the saw regularly with a clean rag. The handles,
in particular, must be kept free of oil.
Checking the plastic housing
Carry out regular visual inspections of all parts of the
housing. Should any parts be damaged, have them
repaired immediately and properly in a MAKITA
specialist repair shop.
Sharpening the saw chain
CAUTION:
Always withdraw the mains plug and wear safety
•
gloves when performing work on the saw chain.
006924
Sharpen the saw chain when:
Mealy sawdust is produced when damp wood is
cut;
The chain penetrates the wood with difficulty, even
when heavy pressure is applied;
The cutting edge is obviously damaged;
The saw pulls to the left or right in the wood. The
reason for this behaviour is uneven sharpening of
the saw chain, or damage to one side only.
Sharpen the saw chain frequently, but remove only
a little material each time.
Two or three strokes with a file are usually sufficient for
routine resharpening. When the saw chain has been
resharpened several times, have it sharpened in a
MAKITA specialist repair shop.
Sharpening criteria:
All cutters must be of equal length (dimension a).
Cutters of differing length prevent the chain from
running smoothly, and may cause the chain to
break.
any
Do not sharpen the chain once a minimum cutter
length of 3 mm has been reached. A new chain
must then be fitted.
15