Makita DUC304 - Cleaning the Guide Bar

18
ENGLISH
30
30
55
55
Fig.25
— The sharpening angle of 30° must be
the same on all cutters. Di󰀨erent cutter
angles cause the chain to run roughly and
unevenly, accelerate wear, and lead to
chain breaks.
— Use a suitable round le so that the proper
sharpening angle is kept against the teeth.
• Chain blade 90PX : 55°
Chain blade 80TXL : 55°
File and le guiding
— Use a special round le (optional accessory)
for saw chains to sharpen the chain. Normal
round les are not suitable.
— Diameter of the round le for each saw
chain is as follows:
• Chain blade 90PX : 4.5 mm (3/16″)
Chain blade 80TXL : 4.0 mm (5/32″)
— The le should only engage the cutter on
the forward stroke. Lift the le o󰀨 the cutter
on the return stroke.
— Sharpen the shortest cutter rst. Then the
length of this shortest cutter becomes the
standard for all other cutters on the saw
chain.
— Guide the le as shown in the gure.
1
2
Fig.26
► 1. File 2. Saw chain
—
The le can be guided more easily if a le holder
(optional accessory) is employed. The le 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 le diameter).
30
1/5
1
Fig.27
► 1. File holder
— After sharpening the chain, check the height
of the depth gauge using the chain gauge
tool (optional accessory).
Fig.28
—
Remove any projecting material, however small,
with a special at le (optional accessory).
— Round o󰀨 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 ow. Clean out the chips and sawdust every
time when you sharpen or replace the saw chain.
Fig.29