Depth Adjustment; Operation; Maintenance - Makita DFS440 Instruction Manual

Reversing switch action
► Fig.6: 1. Reversing switch lever
This tool has a reversing switch to change the direction
of rotation. Depress the reversing switch lever from the
A side for clockwise rotation or from the B side for coun-
terclockwise rotation.
When the reversing switch lever is in the neutral posi-
tion, the switch trigger cannot be pulled.
CAUTION:
Always check the direction of rotation
before operation.
CAUTION:
Use the reversing switch only after
the tool comes to a complete stop. Changing the
direction of rotation before the tool stops may dam-
age the tool.
CAUTION:
When not operating the tool, always
set the reversing switch lever to the neutral position.

Depth adjustment

► Fig.7: 1. Locator
The depth can be adjusted by turning the locator. Turn
it in "B" direction for less depth and in "A" direction for
more depth. One full turn of the locator equals 1.5 mm
change in depth.
Adjust the locator so that the distance between the tip
of the locator and the screw head is approximately 1
mm as shown in the figures. Drive a trial screw into your
material or a piece of duplicate material. If the depth is
still not suitable for the screw, continue adjusting until
you obtain the proper depth setting.
► Fig.8: 1. Locator
► Fig.9: 1. Locator
ASSEMBLY
CAUTION:
• Always be sure that the tool is switched off and
the battery cartridge is removed before carrying
out any work on the tool.
Installing or removing the bit
To remove the bit, pull the locator. Then grasp the bit
with a pair of pliers and pull the bit out of the magnetic
bit holder. Sometimes, it helps to wiggle the bit with the
pliers as you pull.
► Fig.10: 1. Locator
To install the bit, push it firmly into the magnetic bit
holder. Then install the locator by pushing it firmly back.
► Fig.11: 1. Locator 2. Bit 3. Magnetic bit holder
Bit storage
► Fig.12
Fit the bit into the protrusion at the tool.
Carry hook
The carry hook is convenient for temporarily hooking
the tool. It can be installed on either side of the tool.
When removing the carry hook, widen it by pressing its
right ends ON BOTH SIDES in the directions of arrow
(1) and raise it in the direction of the arrow (2).
► Fig.13: 1. Hook

OPERATION

Screwdriving operation
► Fig.14
Fit the screw on the point of the bit and place the point
of the screw on the surface of the workpiece to be fas-
tened. Apply pressure to the tool and start it. Withdraw
the tool as soon as the clutch cuts in. Then release the
switch trigger.
CAUTION:
• When fitting the screw onto the point of the bit,
be careful not to push in on the screw. If the
screw is pushed in, the clutch will engage and
the screw will rotate suddenly. This could dam-
age a workpiece or cause an injury.
• Make sure that the bit is inserted straight in the
screw head, or the screw and/or bit may be
damaged.

MAINTENANCE

CAUTION:
• Always be sure that the tool is switched off and
the battery cartridge is removed before attempt-
ing to perform inspection or maintenance.
• Never use gasoline, benzine, thinner, alcohol
or the like. Discoloration, deformation or cracks
may result.
Replacing carbon brushes
► Fig.15: 1. Limit mark
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 identical carbon brushes.
Use a screwdriver to remove two screws then remove
the front cover.
► Fig.16: 1. Front cover 2. Screws
Raise the arm part of the spring and then place it in the
recessed part of the housing with a slotted bit screw-
driver of slender shaft or the like.
► Fig.17: 1. Spring 2. Arm 3. Recessed part
Use pliers to remove the carbon brush caps of the
carbon brushes. Take out the worn carbon brushes,
insert the new ones and replace the carbon brush caps
in reverse.
8 ENGLISH