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ÿþECHNICAL INFORMATION
PRODUCT
T
P 1 / 7
MT240
Models No.
Description
Portable Cut-Off 355mm (14")
CONCEPTION AND MAIN APPLICATIONS
The above product has been added to MAKTEC series tool.
Its features are as follows. H
* Less expensive but service life is as long as existing
MAKITA models.
* Easy-to-repair construction
Dimensions : mm ( " )
Length ( L )
500 (19-3/4)
Height ( H )
620 (24-3/8) W
L
Width ( W )
280 (11)
Specification
Continuous Rating (W)
Voltage (V) Current (A) Cycle (Hz) Max. Output(W)
Input Output
110 15.0 50 / 60 1,650 900 2,500
60
120 15.0 900 2,500
220 9.6 50 / 60 2,000 1,400 3,000
230 9.2 50 / 60
2,000 1,400 3,000
240 8.8 50 / 60 2,000 1,400 3,000
No load speed : min-1= rpm. 3,800
Diameter
355 (14)
Wheel size
Arbor 25.4 (1)
: mm ( " )
Thickness 3 (1/8)
Net weight : Kg ( lbs )
15.9 (35.1) including abrasive cut off wheel
2.0 (6.6) for Australia
Cord length : m (ft )
2.5 (8.2) for other countries
Capacity : mm ( " )
Miter Angle 0° 45°
D 115 (4-1/2) 115 (4-1/2)
W
W : 194 (7-5/8) H : 102 (4)
H : 115 (4-1/2) W : 103 (4-1/16)
H
W : 233 (9-1/8) H : 70 (2-3/4)
Form of
L
materials
L : 119 (4-11/16) L : 106 (4-3/16)
L
S S
S : 137 (5-3/8) T : 10 (3/8) S : 100 (3-15/16) T : 10 (3/8)
T
Standard equipment
* Socket wrench 17 ....................................... 1 pc.
* Switch button for spare ............................... 1 pc. (for the countries which require "Lock off switch"
* Abrasive cut off wheel ............................... 1 pc.
The standard equipment for the tool shown may differ from country to country.
P 2 / 7
Repair
Lubrication
Apply MAKITA grease N. No.1 to the following portions designated with black triangle, to protect
parts and product from unusual abrasion. See Fig. 1.
20. Helical gear 49
57. Gear room of gear housing : approx 25g
77. Pipe 20-128 : approx. 0.1g
Fig. 1
Gear housing
20
57
77
Replacing armature
( 1 ) Remove carbon brushes. Remove handle L by unscrewing three M4x25 pan head screws and
four M5x40 pan head screws. See Fig. 2.
( 2 ) Remove motor housing by unscrewing four M5x40 pan head screws. Then, armature can be removed.
See Fig. 3.
Fig. 2
Fig. 3
Carbon brush
Handle L
Motor housing
Pan Hd.Screw
Armature
Pan Hd.Screw
M5x40 (4 pcs.)
M5x40 (3 pcs.)
Pan Hd.Screw
M4x25 (4 pcs.)
( 3 ) After mounting new armature to gear housing, secure motor housing with 4 pcs. of pan head screws M5x40 as
illustrated in Fig. 3.
( 4 ) Secure handle L with 4 pcs. of pan head screws M4x25 and 3 pcs. of pan head screws M5x40. And mount
carbon brush. See Fig. 2.
P 3 / 7
Repair
Disassembling gear section
( 1 ) Take off hex bolt M10x25, outer flange 90, abrasive cut off wheel, O ring 14, ring 17 and inner flange 90 from
spindle. See Fig. 4.
Fig. 4
Inner flange 90
Abrasive cut off
wheel
Ring 17
Outer flange 90
O ring 14
Hex bolt M10x25
( 2 ) Unscrew four M5x20 pan head screws. Then, safety cover and gear section can be removed from
the machine. See Fig. 5.
Fig. 5
Safety cover
Gear section
Pan head
screws M5x20
( 4 pcs.)
( 3 ) Remove ball bearing 6000ZZ with No.1R269 "Bearing extractor" as illustrated in Fig. 6.
( 4 ) Press spindle with arbor press. Then, helical gear 49 can be removed. See Fig. 7.
Fig. 6 Fig. 7
Ball bearing 6203ZZ
Ball bearing 6000ZZ
Bearing box
Helical gear 49
Spindle
P 4 / 7
Repair
Assembling gear section
( 1 ) Put helical gear 49 on the bearing setting plate and mount spindle to the helical gear 49 by pressing
with arbor press. See Fig. 8.
( 2 ) Put bearing box on the bearing setting plate and mount the helical gear 49 to the bearing box by pressing
with arbor press. And then, mount ball bearing 6000ZZ to spindle. See Fig. 9.
Fig. 8 Fig. 9
Ball bearing
Aligning this flat portion
6000ZZ
Spindle
of spindle with the
flat portion of helical
Bearing box
gear 49, press the spindle
with arbor press.
Helical gear 49
Flat portion of helical
gear 49
Bearing
Bearing
setting plate
setting plate
Removing vise section
( 1 ) Unscrew 2 pcs. of pan head screws M8x30. Then, screw guide can slide on base. See Fig. 10.
( 2 ) Slide the vise section in the direction of arrow. Align the shoulder pin with the assembling hole of base.
See Fig. 11.
( 3 ) Remove vise section from the assembling hole. See Fig. 12.
Fig. 12
Fig. 11
Fig. 10
Pan head screw M8x30
Assembling
Vise screw
hole
Shoulder
Screw guide
pin
Assembling
Vise plate
hole
Base
Base
Base
Removing Motor unit from base
( 1 ) Secure the motor unit with chain as illustrated in Fig. 13.
( 2 ) Remove spark guard from base, and unscrew hex socket head bolt M6x12 and hex nut M6. See Fig. 14.
Fig. 13
Fig. 14
Gear housing
Secure the motor
unit with chain.
Hex socket Hex nut M6
Base
head bolt M6x12
Pan head
Spark guard
screw M6x10
P 5 / 7
Repair
( 3 ) Lay the product. Remove chain with which you secured the motor unit in Fig. 13, from hanger of handle.
See Fig. 15.
( 4 ) Bring the motor unit to the area in which torsion spring does not influence the motor unit any more. See Fig. 15.
( 5 ) Unscrew Hex nut M10-17 and remove spring washer 10, flat washer 10, hex bolt M10-140 and another flat
washer 10. See Fig. 15.
Fig. 15
Hex nut M10-17
Spring washer 10
Flat washer 10
Flat washer 10
Hex bolt M10-140
Remove chain from
hanger of handle.
Bring the motor unit to the area in which torsion spring does not influence
the motor unit any more.
( 6 ) Remove pipe 20-128 by striking with hammer slightly. Then the motor unit can be separated from base.
See Fig. 16.
Fig. 16
No.1R246
Motor unit
Round bar for arbor
Torsion spring 24
Pipe 20-128
P 6 / 7
Circuit diagram
Color index of lead wires
Black
White
Blue
Brown
brown or black
blue or white
1
Switch
2
Insulated
terminal
Brush holder A
Field
Switch
Brush holder B
P 7 / 7
Wiring diagram
Field lead wire (white)
to be connected with
Wiring in motor housing
switch
Field lead wire (black)
to be connected with
Field
terminal block or
Field lead wires
insulated terminal
(black and white) have to be
hold with lead holders as
Lead
illustrated left.
holders
Motor housing
Wiring in handle R
Insulated connecter
Field lead wire
(white)
Field lead wire
(Black)
Pass field lead wires (black and
Switch
white) between rib A and rib B.
Lead wires have to be
so put, that they do not
sag in this area.
Rib A of handle R
Rib B of handle R [ Pobierz całość w formacie PDF ]

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