Hitachi CR 12DA User manual

PRODUCT NAME
10.8 V Cordless Reciprocating Saw
Model CR 12DA
REPAIR GUIDE ----------------------------------------------------------------------------------------------------------------- 1
1. Precautions on disassembly and reassembly ----------------------------------------------------------- 1
• Disassembly -------------------------------------------------------------------------------------------------- 1
• Reassembly -------------------------------------------------------------------------------------------------- 3
• Tightening torque ------------------------------------------------------------------------------------------- 6
• Checking after reassembly ------------------------------------------------------------------------------- 6
• No-load current value -------------------------------------------------------------------------------------- 6
• Connecting diagram ---------------------------------------------------------------------------------------- 6
CONTENTS Page
C
CONFIDENTIAL
Jul. 2020
Overseas Sales Management Dept.
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Fig. 2 • For China, UAE, Thailand, Singapore, Malaysia, and India
[14]
[7]
[10]
[5]
[4]
[1]
WARNING: Be sure to remove the battery from the main body before starting repair or maintenance
work. If the switch is activated inadvertently with the battery still mounted on the main
body, the motor may turn unexpectedly and could cause serious injury.
1. Precautions on disassembly and reassembly
[Bold] numbers in the description below correspond to the item numbers in the parts list and exploded
assembly diagram for the Model CR 12DA.
First, be sure to remove the saw blade from the main body to prevent damage to the cutting edges of the
saw blade and avoid personal injury due to the saw blade.
1. Removal of the base
(1) Remove the base while pressing the base lock button.
2. Disassembly of housing (A).(B) set
(1) Loosen nine Tapping Screws (W/Flange) D3 x 16 [4] and remove housing (B) of Housing (A).(B) Set
[14].
(2) Remove the DC-Speed Control Switch [10], Pushing Button (A) [7], Gear Box [1], and Locking Knob
[5] from housing (A) of Housing (A).(B) Set [14].
REPAIR GUIDE
Disassembly
Fig. 1
Base lock button
Base
Housing (A)
Housing (B)
[6]
[2]
Motor
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Fig. 4 • Removal of the battery terminal
[14]
[7]
[10]
[5]
[4]
[1]
Fig. 3 • For Europe and UK
[8]
3. Disassembly of the power supply unit
(1) To disconnect the red and black internal wires of the motor in the Gear Box [1] from the DC-Speed
Control Switch [10], use a soldering iron to unsolder them.
NOTE: Do not disassemble the DC-Speed Control Switch [10].
(2) Remove the Battery Terminal [12] from the DC-Speed Control Switch [10]. Pull the internal wire toward
“A” as shown in the figure below while pressing the claw of the faston terminal to remove the faston
terminal.
A
Faston terminal
Claw
[12]
Housing (A)
Housing (B)
[9]
Motor
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Fig. 5 • Connecting the internal wires to the battery terminal
Perform reassembly by reversing the disassembly procedure, but note the following.
1. Reassembly of the power supply unit and its vicinity
NOTE: Perform wiring correctly according to Figs. 6 and 9 being careful of the internal wiring and
the connecting directions.
(1) Connect each internal wire to the Battery Terminal [12] securely until the faston terminal clicks into place.
• Insert the red internal wire into the "+" terminal of the Battery Terminal [12].
• Insert the blue internal wire into the "D" terminal of the Battery Terminal [12].
• Insert the black internal wire into the "-" terminal of the Battery Terminal [12].
• Insert the green internal wire into the "LD" terminal of the Battery Terminal [12].
• After inserting the internal wires, check that the internal wires are securely connected by pulling the
internal wires lightly.
(2) Perform the following steps (a) and (b) being careful of the colors of the internal wires and the terminals
when soldering the internal wires to the motor and the DC-Speed Control Switch [10]. (See Fig. 6.)
(a) Solder one end of the internal wire (red) to the “+” terminal (red marking side) of the motor and
connect the other end to “M1” terminal of the DC-Speed Control Switch [10].
(b) Solder one end of the internal wire (black) to the “-” terminal (opposite side of the red marking side)
of the motor and connect the other end to “M2” terminal of the DC-Speed Control Switch [10].
(3) Push the internal wires of the DC-Speed Control Switch [10] into the ribs and grooves of housing (A) to
prevent the internal wires from being caught between housings (A) and (B). (See Figs. 7 and 8.)
(4) Fit the protrusion of the direction selector lever on the top of the DC-Speed Control Switch [10] into the
hole on Pushing Button (A) [7] and mount it to housing (A).
NOTE: If the contacts of the Battery Terminal [12] with the battery are covered with black oxide
or not plated, the contacts may heat up, possibly resulting in breakdown of the battery or
the tool main body. In such a case, replace the Battery Terminal [12] with new one.
Reassembly
Internal wire (red)
Internal wire (blue)
(“+” terminal)
(“D” terminal)
Internal wire (green)
(“LD” terminal)
Internal wire (black)
(“-” terminal)
[12]
LD

D
+
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Fig. 6 • Reassembly of the power supply unit and its vicinity
Motor
Solder.
LED light
[10]
40°±10°
“-” terminal
Red marking
10°±10°
“+” terminal
Internal wire (black)
Internal wire (red)
Internal wire (black)
Internal wire (red)
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Fig. 7 • Reassembly of housing (A).(B) set (1)
Fig. 8 • Reassembly of housing (A).(B) set (2)
2. Reassembly of housing (A).(B) set
(1) Mount the Locking Knob [5] to housing (A).
(2) Put the Gear Box [1], Pushing Button (A) [7], and DC-Speed Control Switch [10] together and mount it
to housing (A).
NOTE: • Fit the internal wire of the LED light in the internal wire guide grooves in housing (A).
• Fit the black and red internal wires in the internal wire guide grooves in housing (A).
Fit the internal wire of the
LED light in the internal wire
guide grooves.
Fit the black and red internal wires
in the internal wire guide grooves.
[5]
Bend the motor terminal.
B
A
Bend the red internal wire and
place it under the motor terminal.
Red internal wire
Place the black internal wire
under the red internal wire.
A
B
20°±10°
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• Tapping Screw (W/Flange) D3 x 16 (Black) [4] ························· 1.3±0.3 N•m {13±3 kgf•cm}
Check the following after reassembly.
(1) Check that the operation of the DC-Speed Control Switch [10] and Pushing Button (A) [7] is smooth and
normal.
(2) Check that the LED light turns on while pulling the trigger of the DC-Speed Control Switch [10].
(3) Check that the speed changes properly by pulling the trigger of the DC-Speed Control Switch [10].
(4) Check that the blade is securely attached.
The no-load current value must be 5.0 A ± 1.0 A after running for 5 minutes or longer with a fully charged
DC 12 V battery.
Perform wiring as illustrated in the diagram below. Be sure to connect the internal wires correctly.
If incorrectly connected, the motor may not turn or other problems could occur.
Checking after reassembly
Tightening torque
No-load current value
Connecting diagram
Fig. 9 • Connecting diagram
Battery terminal
LED light
DC-speed
control switch
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M O D E L
Rev.1
CR12DA
1
2
3
4
5
679
8
10
13
501 502
14
509
12
505
507
508
506
503
504
11
11
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ITEM CODE NO.
NO. NO. USED
1 376375 GEAR BOX 1
*2 376553 INTERNAL WIRE (BLACK) L110 1 FOR CHN, UAE, THA, SIN, MAL, IND
3 NAME PLATE 1
4 313687 TAPPING SCREW (W/FLANGE) D3 X 16 (BLACK) 9
5 376377 LOCKING KNOB 1
*6 376552 INTERNAL WIRE (RED) L105 1 FOR CHN, UAE, THA, SIN, MAL, IND
7 329548 PUSHING BUTTON (A) 1
*8 375921 SUPPORT (D) 1 FOR EUROPE, GBR
*9 376554 INTERNAL WIRE FERRITE SET 1 FOR EUROPE, GBR
10 376376 DC-SPEED CONTROL SWITCH 1
11 327002 LOCK NUT M4 (BLACK) 2
12 374387 BATTERY TERMINAL 1
13 374954 BATTERY BSL 1225M (EUROPE) 2 INCLUD. 502
14 376374 HOUSING (A).(B) SET 1
501 CHARGER (MODEL UC12SL) 1
502 374778 BATTERY COVER 1
503 958185 SABER SAW BLADES NO. 5 (5 PCS.) 1
504 318617 SABER SAW BLADES NO. 107 150L P.24 (5 PCS.) 1
505 336471 CASE ASS'Y (STACKABLE 2) 1 INCLUD. 506-508
506 336472 LATCH 4
507 336473 HANDLE 1
508 336474 HINGE 2
509 376550 INNER TRAY 1
601 959611 SABER SAW BLADES NO. 4 (5 PCS.) 1
602 318611 SABER SAW BLADES NO. 101 150L P.10 (5 PCS.) 1
603 318612 SABER SAW BLADES NO. 102 228L P.10 (5 PCS.) 1
604 318613 SABER SAW BLADES NO. 103 150L P.14 (5 PCS.) 1
605 318614 SABER SAW BLADES NO. 104 228L P.14 (5 PCS.) 1
606 318618 SABER SAW BLADES NO. 108 228L P.24 (5 PCS.) 1
607 324818 SABER SAW BLADES NO. 109 150L P.18 (5 PCS.) 1
608 324819 SABER SAW BLADES NO. 110 228L P.18 (5 PCS.) 1
609 318619 SABER SAW BLADES NO. 121 305L P.6 (5 PCS.) 1
610 318620 SABER SAW BLADES NO. 131 305L P.10/14 (5 PCS.) 1
611 318621 SABER SAW BLADES NO. 132 203L (5 PCS.) 1
612 370683 CURVED BLADES NO. 141(S)150L P.14 (3 PCS.) 1
613 370684 CURVED BLADES NO. 142(S)200L P.14 (3 PCS.) 1
614 370685 CURVED BLADES NO. 143(S)250L P.14 (3 PCS.) 1
615 371902 CURVED BLADES NO. 158 200L P.8 (3 PCS.) 1
DESCRIPTION REMARKS
STANDARD ACCESSORIES
OPTIONAL ACCESSORIES
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