Hitachi DV 18DD Bedienungsanleitung

PRODUCT NAME

18 V Cordless Impact Driver Drill*1

Models DV 18DD, DV 18DDX*2

*1: “Cordless Combi Drill” for Europe

*2: Designed for operating in UK only

REPAIR GUIDE -----------------------------------------------------------------------------------------------------------------1

1. Precautions on disassembly and reassembly ------------------------------------------------------------1

• Disassembly----------------------------------------------------------------------------------------------------1

• Reassembly ----------------------------------------------------------------------------------------------------2

• Checking after reassembly ---------------------------------------------------------------------------------5

• Tightening torque----------------------------------------------------------------------------------------------5

• No-load current ------------------------------------------------------------------------------------------------5

• Wiring diagram-------------------------------------------------------------------------------------------------6

2. Precautions on disassembly and reassembly of the charger -----------------------------------------6

CONTENTS Page

Power Tools Service Manual

CONFIDENTIAL

Jul. 2020

Overseas Sales Management Dept.

DV 18DD

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-1-

• Removal of the drill chuck

[2]

Clutch dial

WARNING: Always remove the battery from the main body before starting repair or maintenance

work. Because the tool is cordless, inadvertently activating the switch with the battery

left in the main body will start the motor rotating 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 lists and exploded

assembly diagrams for the Models DV 18DD and DV 18DDX.

1. Removal of the drill chuck

(1) For removal of the Drill Chuck [2] from the drill body, first use a vise to clamp the drill body, and then go

to steps (a) and (b) below. A cloth should be placed between the drill body and the vise to protect

Housing (A).(B) Set [11] against damage.

(a) Fully open the jaw of the Drill Chuck [2], and then use dedicated driver bit T25 (T-shaped

hexalobular screw) to turn the Left-Hand Hexalobular M5 [1] clockwise and remove it.

NOTE: The Left-Hand Hexalobular M5 [1] is a left-hand threaded screw. Use of a driver bit

other than T25 may strip the screw thread and thus prevent the removal of the Drill

Chuck [2]. To avoid this situation, be sure to only use dedicated driver bit T25.

(b) Insert an 8 mm hex. bar wrench into the top of the Drill Chuck [2], clamp it as shown below, and then

turn the wrench counterclockwise to detach the chuck. Use a pipe or other means of leverage in

case the chuck is difficult to loosen.

(2) Set the clutch dial to the clutch “1” position.

Disassembly

REPAIR GUIDE

Cloth

8 mm hex. bar wrench

Vise

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-2-

• Disassembly of housing (A).(B) set

[3]

[4]

[9]

[6]

[7]

[8]

[11]

[10]

2. Disassembly of housing (A).(B) set

(1) Remove the eight Tapping Screws (W/Flange) D3 x 16 [4] from the drill body, hold Housing (A).(B) Set

[11] at its battery mount portion, and then gently open Housing (A).(B) Set [11].

(2) Remove housing (B) and remove such built-in parts as modules and units. Lift up Gear Box (C) [3] to

remove the built-in parts together from housing (A). The built-in parts are Gear Box (C) [3], Wiring Ass’y

[6], Battery Terminal [10], Pushing Button [7], and Shift Knob [9].

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-3-

• Reassembly of the power supply unit and its vicinity

Generally, perform reassembly by reversing the disassembly procedure. However, special attention should

be given to the following items.

1. Reassembly of the power supply unit and its vicinity

Reassembly

[7]

Fit the protrusion of the direction

selector lever of the switch into the

hole of the Pushing Button [7].

Insert the brown internal wire into the

internal wire threading groove first, then

insert the orange internal wire, ribbon

cable, and purple internal wire into the

internal wire threading groove.

Insert the tip (connector) of the D wire

(blue) into the space in the housing.

NOTE: The D wire is intended for

exterior communication so

that the supplier can check

the controller status.

LED

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-4-

2. Reassembly of housing (A).(B) set

(1) Mount the reassembled power supply unit and Gear Box (C) [3] in housing (A).

(2) Check that the protrusion of the direction selector lever of the DC-speed control switch is correctly put in

the hole of the Pushing Button [7].

(3) Mount the shift arm to the groove of the Shift Knob [9] positioning the "HIGH" marking on the Shift Knob

[9] at the rear.

(4) Mount housing (B) to housing (A) and fasten it with the eight Tapping Screws (W/Flange) D3 x 16 [4].

(5) After completing reassembly up to step (4), check that each marking on the mode-switching dial

(screw-tightening mark “ ,” drill mark “ ,” and hammer mark “ ”) is aligned with the triangle mark

on Housing (A).(B) Set [11], and the mode-switching dial rotates regularly. Also check that the clutch

dial rotates regularly. If the mode is not switched properly or the mode-switching dial or the clutch dial

does not rotate regularly, the dial may be improperly mounted. Mount the dial correctly. Check the

operation of the Shift Knob [9]. Switch the Shift Knob [9] and make sure the speed is correctly switched

between HIGH and LOW. If the speed change is disabled or abnormal, the Shift Knob [9] or other parts

may not be properly mounted. Mount the Shift Knob [9] or other parts correctly. Align the

mode-switching dial to the hammer mark “ .” Pressing the tip of the chuck against a workpiece, pull

the trigger switch to check for proper hammering.

3. Mounting the drill chuck

(1) Mount the Drill Chuck [2] to the spindle and fasten it with the Left-Hand Hexalobular M5 [1].

NOTE: The tightening torque of the Drill Chuck [2] is 29.4±2 N•m {300±20 kgf•cm}. It is higher

than that of the conventional models. Securely tighten the Drill Chuck [2] at 29.4±2 N•m

{300±20 kgf•cm}. If the Drill Chuck [2] is tightened at lower torque, the Drill Chuck [2] may

be loose.

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-5-

After reassembly, install the battery in the tool body and check for operation of each component as follows.

(1) Checking for lighting of the LED light

Make sure the LED light turns on while pulling the switch and automatically turns off in about ten

seconds when you release your finger from the switch.

(2) Checking for rotating direction of the drill chuck

Press the Pushing Button [7] and check the Drill Chuck [2] rotates as indicated on the button. When you

press the “R” side of the Pushing Button [7], the Drill Chuck [2] turns clockwise as viewed from the rear

of the tool body.

(3) Checking for runout of the drill chuck

Check that runout of the Drill Chuck [2] is 0.8 mm or less under the following conditions.

Condition 1: Set a 12-mm dia. test bar in the Drill Chuck [2] and measure runout of the Drill Chuck [2] at

a position 110 mm away from the tip of the Drill Chuck [2].

Condition 2: Set a 6-mm dia. test bar in the Drill Chuck [2] and measure runout of the Drill Chuck [2] at

a position 70 mm away from the tip of the Drill Chuck [2].

Item

No. Part name No.

used

Tightening torque

N•m kgf•cm

[1] Left-Hand Hexalobular M5 1 3.4±0.5 35±5

[2] Drill Chuck 13TLRA-N 1 29.4±2 300±20

[4] Tapping Screw (W/Flange) D3 x 16 (Black) 8 1.3±0.3 13±3

Measure the no-load current by using a fully charged battery after no-load running for five minutes.

No-load current: 2.0±1.0 A (DC 19.8 V—equivalent to the voltage of a fully charged battery) in High mode

Checking after reassembly

Tightening torque

No-load current

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-6-

• Wiring diagram

• Connecting diagram LED

DC-speed control switch

Battery terminal

+ (red) Controller

- (black)

LD (green)

2. Precautions on disassembly and reassembly of the charger

Refer to the Service Manual for precautions on disassembly and reassembly of the charger Models

UC 18YFSL and UC 18YKSL.

Wiring diagram

[9]

LED

Insert the internal wire into the

internal wire threading groove.

[10]

[8]

[3]

Mode-switching dial

Clutch dial

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M O D E L

Rev.1

DV18DD

506

508

507

509

504501 502 503

501

510

505

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ITEM CODE NO.

NO. NO. USED

1 337426 LEFT-HAND HEXALOBULAR M5 1

2 376359 DRILL CHUCK 13TLRA-N 1

3 374385 GEAR BOX (C) 1

4 313687 TAPPING SCREW (W/FLANGE) D3 X 16 (BLACK) 8

5 NAME PLATE 1

6 376360 WIRING ASS'Y 1

7 374399 PUSHING BUTTON 1

8 376362 DC-SPEED CONTROL SWITCH 1

9 374382 SHIFT KNOB 1

10 376361 BATTERY TERMINAL 1

11 376357 HOUSING (A).(B) SET 1

*12 333352 BATTERY BSL 1815 (EUROPE) 2 INCLUD. 502

*12 334725 BATTERY BSL 1815 (CHN) 2 INCLUD. 502

*12 334726 BATTERY BSL 1815 (TPE) 2 INCLUD. 502

*12 339783 BATTERY BSL 1830C (EUROPE, AUS, NZL) 2 INCLUD. 502

*12 376029 BATTERY BSL 1850C (EUROPE, AUS, NZL) 2 INCLUD. 502

*501 CHARGER (MODEL UC18YKSL) 1 FOR CHN, SIN, MAL, AUS, NZL

*501 CHARGER (MODEL UC18YFSL) 1 FOR EUROPE

502 329897 BATTERY COVER 1

503 983006 + DRIVER BIT NO. 2 65L 1

504 336642 CASE 1

505 376358 HOOK SET 1

506 336471 CASE ASS'Y (STACKABLE 2) 1 INCLUD. 507-509

507 336472 LATCH 4

508 336473 HANDLE 1

509 336474 HINGE 2

510 376502 INNER TRAY 1

DESCRIPTION REMARKS

STANDARD ACCESSORIES

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