Replacing Carbon Brushes; After Use - Makita LS1440 Instruction Manual

1. Gear housing
2. Hex lock nut
3. Arm
1. Limit mark
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2
1. Screwdriver
2. Brush holder cap
Adjusting for smooth handle action
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The hex lock nut which holds the gear housing and the arm
has been factory adjusted to assure smooth handle action up
and down and to guarantee precise cutting. Do not tamper
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with it. Should looseness develop at the gear housing and
arm connection, perform the following adjustment. Work the
handle up and down while tightening the hex lock nut; the
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best position to tighten the hex lock nut is just before the
motor body weight is obvious.
After adjusting the hex lock nut, be sure that the handle
returns automatically to the initial, raised position from any
position. If the hex lock nut is too loose, the cutting accuracy
will be affected; if it is too tight, it will be hard to work the han-
dle up and down. Note that this is a self locking nut. It is a
special type that does not loosen in normal use. It should not
be overtightened or replaced with other types of nuts.

Replacing carbon brushes

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Remove and check the carbon brushes regularly. Replace
when they wear down to the limit mark. Keep the carbon
brushes clean and free to slip in the holders. Both carbon
brushes should be replaced at the same time. Use only iden-
tical carbon brushes.
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Use a screwdriver to remove the brush holder caps. Take out
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the worn carbon brushes, insert the new ones and secure
the brush holder caps.
After replacing brushes, plug in the tool and break in brushes
by running tool with no load for about 10 minutes. Then
check the tool while running and electric brake operation
when releasing the switch trigger. If electric brake is not
working well, ask your local Makita service center for repair.

After use

• After use, wipe off chips and dust adhering to the tool
with a cloth or the like. Keep the blade guard clean
according to the directions in the previously covered
section titled "Blade guard". Lubricate the sliding
portions with machine oil to prevent rust.
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