Cleaning The Guide Bar - Makita DUC256 Instruction Manual

— Use a suitable round file so that the proper
sharpening angle is kept against the teeth.
• Chain blade 90PX : 55°
• Chain blade 91PX : 55°
• Chain blade 25AP : 55°
File and file guiding
— Use a special round file (optional accessory)
for saw chains to sharpen the chain. Normal
round files are not suitable.
— Diameter of the round file for each saw
chain is as follows:
• Chain blade 90PX : 4.5 mm (3/16")
• Chain blade 91PX : 4.0 mm (5/32")
• Chain blade 25AP : 4.0 mm (5/32")
— The file should only engage the cutter on
the forward stroke. Lift the file off the cutter
on the return stroke.
— Sharpen the shortest cutter first. Then the
length of this shortest cutter becomes the
standard for all other cutters on the saw chain.
— Guide the file as shown in the figure.
1
2
► 1. File 2. Saw chain
— The file can be guided more easily if a file holder
(optional accessory) is employed. The file holder has
markings for the correct sharpening angle of 30° (align
the markings parallel to the saw chain) and limits the
depth of penetration (to 4/5 of the file diameter).
30
► 1. File holder
1
1/5
— After sharpening the chain, check the height
of the depth gauge using the chain gauge
tool (optional accessory).
— Remove any projecting material, how-
ever small, with a special flat file (optional
accessory).
— Round off the front of the depth gauge again.

Cleaning the guide bar

Chips and sawdust will build up in the guide bar
groove. They may clog the bar groove and impair
the oil flow. Clean out the chips and sawdust every
time when you sharpen or replace the saw chain.
Cleaning the sprocket cover
Chips and saw dust will accumulate inside of the
sprocket cover. Remove the sprocket cover and saw
chain from the tool then clean the chips and saw dust.
19 ENGLISH