Operation Manual

9
Maintenance schedule
Operating hour
Before
Operation
Daily
(10 h)
25 h 50 h
If
required
Corresponding page
Whole unit Visually inspect for
damaged parts
8
All xing screws and nuts Tighten
8
Chain oil feed port Clean
8
Guide bar Clean the groove and the
chain oil feed port
8
Visually inspect
8
Supply grease to the nose
8
Gear case Supply grease
8
Drive axle Supply grease
8
Sprocket Visually inspect
8
Saw chain Replace or ask for
sharpening
8
Power unit Refer to the instruction manual of the power unit
Troubleshooting
Problem Probable cause Solution
The motor does not start. Refer to the instruction manual of the power unit.
The motor stops soon after its start.
The maximum speed is limited.
The saw chain does not move.
Stop the motor immediately!
The guide bar is bent or damaged. Replace the guide bar.
A twig is caught by the saw chain. Remove the foreign matter.
The drive system does not work properly. Ask Makita authorized service center to
inspect and repair it.
The unit vibrates abnormally.
Stop the motor immediately!
The drive system does not work properly. Ask Makita authorized service center to
inspect and repair it.
The saw chain does not stop.
Stop the motor immediately!
The power unit does not work properly. Refer to the instruction manual of the power
unit.
Chain oil is not supplied. The oil tank is empty. Fill the oil tank with chain oil.
The chain-oil feed port is dirty. Clean the chain-oil feed port on the unit and
guide bar.
The adjusting screw of the chain-oil feed rate
is improperly set.
Set the adjusting screw properly.
Technical data
Model EY401MP
Dimensions (L x W x H) mm 1,166 x 74 x 105
Mass kg 1.0
Guide bar length mm 255 (10”)
Saw chain 91VXL-39E
Chain gauge inch 0.050”
Number of sprocket teeth 7
Chain oil Makita genuine chain oil
Chain oil pump Plunger pump
(Self lubricating type)
Chain oil tank capacity ml 120
Gear ratio (speed increasing) 0.94