Hitachi WH 14DBDL Bedienungsanleitung
[WH 18DBDL]
[WR 18DBDL]
Hitachi 14.4 / 18 V Cordless Impact Driver
Models WH 14DBDL, WH 18DBDL
Hitachi 14.4 / 18 V Cordless Impact Wrench
Models WR 14DBDL, WR 18DBDL
LIST Nos.
WH 14DBDL: H886
WH 18DBDL: H887
WR 14DBDL: H884
WR 18DBDL: H885
May. 2011
International Sales Division W
PRODUCT NAME
TROUBLESHOOTING GUIDE ---------------------------------------------------------------------------------------------- 1
1. Troubleshooting and Repair ----------------------------------------------------------------------------------- 1
REPAIR GUIDE ----------------------------------------------------------------------------------------------------------------- 2
1. Precautions on disassembly and reassembly ------------------------------------------------------------ 2
2. Precautions on disassembly and reassembly of battery charger ---------------------------------- 18
STANDARD REPAIR TIME (UNIT) SCHEDULES ------------------------------------------------------------------- 19
CONTENTS Page
-1-
1. Troubleshooting and Repair
Symptom Possible cause Troubleshooting Repairing
• Insufficient
connection of flat
cable (B) of switch
• Check the connection of flat cable (B).
(See [1. Reassembly of the Wiring
Ass'y] on page 5.)
• Securely connect
flat cable (B).
• Switch connector
failure due to dust
or water
• Check flat cable (B) contact (for
corrosion, dust, water, and other
contaminant).
• Check switch connector (for corrosion,
dust, water, and other contaminant).
• Replace the DC-
Speed Control
Switch and the
controller.
High/Low indicator OFF
• Controller failure
due to dust or
water
• Check the PCB surface (for dust,
water, and other contaminant).
• Replace the
controller.
• Stator FET PCB
failure due to dust,
water, or dropping
• Check the PCB surface (for dust,
water, and drop-caused damage).
• Replace the Stator
FET PCB.
• Controller failure
due to dust, water,
and dropping
• Check the PCB surface (for dust,
water, and drop-caused damage).
• Replace the
controller.
• Poor adhesion of
rotor pinion magnet
• Check whether the magnet is securely
bonded to the rotor pinion.
• Replace the rotor
pinion.
• Insufficient
connection of flat
cable (B) of switch
• Check the connection of flat cable (B).
(See [1. Reassembly of the Wiring
Ass'y] on page 5.)
• Securely connect
flat cable (B).
(1)
No motor
motion
High/Low indicator ON
• Insufficient
connection of
connector cables
(A) and (B)
• Check connection of connector cables
(A) and (B).
(See [1. Reassembly of the Wiring
Ass'y] on page 5.)
• Securely connect
connector cables
(A) and (B).
• Insufficient
connection of
switch flat cable (B)
• Check the flat cable (B) connection.
(See [1. Reassembly of the Wiring
Ass'y] on page 5.)
• Securely connect
flat cable (B).
• Switch connector
failure due to dust
and water
• Check the flat cable (B) contact (for
corrosion, dust, water, and other
contaminant).
• Check the switch connector state (for
corrosion, dust, water, and other
contaminant).
• Replace the DC-
Speed Control
Switch and the
controller.
(2)
No switching
between
Forward and
Reverse
• Switch contact
failure
• When flat cable (B) is not defective • Replace the DC-
Speed Control
Switch.
TROUBLESHOOTING GUIDE
-2-
Symptom Possible cause Troubleshooting Repairing
• Controller failure • Visually check the PCB surface (for
dust, water, and drop-caused
damage).
• Replace the
controller.
• Insufficient
connection of
switch flat cable (B)
• Check the flat cable (B) connection.
(See [1. Reassembly of the Wiring
Ass'y] on page 5.)
• Securely connect
flat cable (B).
• Switch flat cable
(B) connection
failure by dust and
water
• Check the flat cable (B) contact (for
corrosion, water, and other
contaminant).
• Check the switch connector state (for
corro-sion, dust, water, and other
contaminant).
• Replace the DC-
Speed Control
Switch and the
controller.
(3)
No speed-up
(Speed change
disabled)
• Switch contact
failure
• When flat cable (B) is not defective • Replace the DC-
Speed Control
Switch.
(4)
No switching
between High
and Low
• Controller failure • Operate the High/Low selector switch
and confirm its operation.
• Replace the
controller.
(5)
No switching
between Single
and Continuous
• Controller failure • Operate the Single/Continuous
selector switch and confirm its
operation.
• Replace the
controller.
(6)
LED light OFF • Controller failure • Operate the light switch and confirm
that the LED lights.
• Replace the
controller.
-3-
Small flat-blade
screwdriver
A
nvil (D) [8A]
A
nvil (D) Ass’y <4>
Retaining Ring [1]
Retaining Ring [1]
Opening
Washer (D) [2]
Guide Sleeve (D) [4]
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
Numbers enclosed in [Bold] and <Bold> correspond to item numbers in the Parts Lists and exploded
assembly diagrams of these models. ( [Bold] : WH 14DBDL and WH 18DBDL, <Bold> : WR 14DBDL and
WR 18DBDL)
1. Removal of Guide Sleeve (D) (Models WH 14DBDL, WH 18DBDL)
(1) Remove the Retaining Ring [1], Washer (D) [2], Guide Spring (D) [3], and Guide Sleeve (D) [4] in this order
with a small flat-head screwdriver. Do not work too quickly. Be careful not to let Retaining Ring [1] pop up.
Be careful not to lose the two Steel Balls D3.5 [7] in the opening of Anvil (D) [8A]/Anvil (D) Ass’y <4>.
Fig. 1-1
Secure the body, align Retaining Ring [1] opening to
Anvil (D) [8A]/Anvil (D) Ass’y <4> notch, and put
screwdriver edge aslant here.
Fig. 1-2
Press down Washer (D) [2] with the small flat-blade
screwdriver.
Fig. 1-3
Slide the small flat-blade screwdriver under one
side of the gap of the Retaining Ring [1].
Fig. 1-4
Slowly raise the Retaining Ring [1] using the end
face of Guide Sleeve (D) [4] as a fulcrum.
2. Removal of Exterior Parts
(1) Insert the edge of a small flat-head screwdriver into the space between the Front Cap [5]<1> and
Hammer Case [6A]<2>, and then remove the Front Cap [5]<1> from the Hammer Case [6A]<2>.
(2) Remove the Truss Hd. Screw M4 (Black) [29]<26> and Hook [30]<27>. The Hook [30]<27> need not
be removed but is removed here to facilitate disassembly work.
Disassembly
REPAIR GUIDE
-4-
Press down.
Washer (S) [14]<11>
Hammer Spring (H) [13A]
Hammer Spring (F) <10>
Stopper (B) [15A]<12A>
Hammer tub
Spindle [16]<13>
Spindle [16]<13>
Hammer [10A]<7A>
Spindle cam top
Steel Ball D5.556 [9]<6>
Steel ball insertion groove
Washer (S) rest
Dedicated tool (Model J-297)
3. Removal of the Housing (A). (B) Set
(1) Remove the nine Tapping Screws (W/Flange) D4 x 20 (Black) [39]<36>. You can detach Housing (B) of
the Housing (A),(B) Set [26]<23> and Strap (Black) [33]<30>.
(2) You can remove the Hammer Case [6A]<2> and hammer assembly, Inner Cover [24]<21>, Rotor
Pinion [25]<22>, Stator FET PCB [37A]<34>, and DC-Speed Control Switch [35]<32> together as one
body. You can also remove Pushing Button (B) [36]<33>.
4. Disassembly of the Hammer Assembly
(1) Set the hammer assembly (detached from the Hammer Case [6A]<2>) on the washer (S) rest (Model
J-297). Push down the end of the Spindle [16]<13> with a hand press or similar tool to compress
Hammer Spring (H) [13A]/Hammer Spring (F) <10>, and then take out the Stopper (B) [15A]<12A> with
a small flat-head screwdriver or similar tool in this state. Release the hand press.
(2) Remove the hammer assembly from the washer (S) rest, hold the end surface of the Spindle [16]<13>, push
down one of the end tubs of the Hammer [10A]<7A> with a hand press or similar tool, and then compress
Hammer Spring (H) [13A]/Hammer Spring (F) <10>. In this state, draw out the two Steel Balls D5.556
[9]<6> from inside the cam groove in the Spindle [16]<13> and Hammer [10A]<7A> with a small flat-head
screwdriver or similar tool. Remove both from the steel ball insertion groove.
(3) Release the hand press, hold the Hammer [10A]<7A> and Washer (S) [14]<11> together, and then pull both
out from the Spindle [16]<13>. You can now take out Hammer Spring (H) [13A]/Hammer Spring (F) <10>.
Fig.2 • Disassembly of the impact mechanism
-5-
Fig.4 • Disassembly of the Rotor Pinion and Inner Cover
Fig.3 • Disassembly of the Stator FET PCB and Rotor Pinion
5. Disassembly of the Stator FET PCB and Rotor Pinion
(1) The Rotor Pinion [25]<22> has a strong magnetic force. Securely support the Inner Cover [24]<21> and
pull out the Stator from the Stator FET PCB [37A]<34> in the direction of (B).
6. Disassembly of the Rotor Pinion and Inner Cover
(1) Hold the Inner Cover [24]<21> to keep it away from the fan of the Rotor Pinion [25]<22>, and then push
down the end of the Rotor Pinion [25]<22> to detach it.
(2) Detach Ring Gear (E) [19A]<16> and the O-Ring (S-42) [20]<17> from the Inner Cover [24]<21>, and
then demount Damper (A) [23]<20> with a small flat-head screwdriver. (Be careful not to damage the
O-Ring (S-42) [20]<17>.
Stator FET PCB [37A]<34>
Stator Inner Cover [24]<21>
Rotor Pinion [25]<22>
Ring Gear (E) [19A]<16>
O-Ring (S-42) [20]<17>
Washer (E) [21]<18>
Damper (A) [23]<20>
Ball Bearing
6901VVCMPS2L [22]<19>
Inner Cover [24]<21>
-6-
Fig.5 • Power supply
7. Disassembly of the Wiring Ass’y
(1) Remove the two Machine Screws (W/Sp. Washer) M3 x 5 [38]<35> that fasten the terminals of lead
wires (red and black) of the Stator FET PCB [37A]<34> and DC-Speed Control Switch [35]<32>.
(2) Scrape away silicon grease on the connector of the DC-Speed Control Switch [35]<32> with the edge of
a flat-edge screwdriver or similar tool, slowly pull up the connector zip and gradually pull out flat cable
(B) of the Controller [34]<31>.
(3) Cut open the SUMITUBE(R) that covers the joint of connector cables (A) and (B), and then slowly pull
out the cable from the connector.
NOTE: Be careful not to damage the connector cable when cutting open the SUMITUBE(R).
Stator FET PCB [37A]<34>
Connector cable (A)
Lead wire (red)
Machine Screw
(W/Sp. Washer) M3 x 5 [38]<35>
DC-Speed Control Switch [35]<32>
LED light
Connector
Connector cable (A)
Pulling
direction
Connector cable (B)
Connector
Connector cable (B)
Flat cable (B)
Zip
Pull up
Connector
Connector
Flat cable (B)
Controller [34]<31>
Capacitor
Lead wire (black)
B
AA
A-A
Pulling
direction
B
-7-
Notices on reassembly: For reassembly, reverse the disassembly steps but note the following:
1. Reassembly of the Wiring Ass’y
(1) Reconnect the DC-Speed Control Switch [35]<32>, Controller [34]<31>, and Stator FET PCB
[37A]<34> according to the wiring diagram when replacing those components.
(2) Note the following when connecting flat cable (B) to the connector of the DC-Speed Control Switch [35]<32>.
• Reassemble so that you can see the red wire of flat cable (B) when viewed along the A-A line in the
figure.
• Securely insert the wires of flat cable (B) until all are seated.
• Securely insert the wires of flat cable (B) until all are seated.
• Finally, apply silicon grease (ThreeBond TB1211) to the entire body of the connector.
(3) Note the following when connecting connector cable (A) of the Stator FET PCB [37A]<34> and
connector cable (B) of the Controller [34]<31>.
• Match the connector colors when connecting connector cables (A) and (B).
• Securely fit connector cables (A) and (B) to the connectors until the wires hit the innermost ends.
• After connecting connector cables (A) and (B), cover the joint with a SUMITUBE(R).
(Use a heat gun to heat up the SUMITUBE(R).)
(4) Securely insert the lead wires of the Stator FET PCB [37A]<34> and DC-Speed Control Switch
[35]<32> into the lead wire threading groove of housing (A) so that the wires will not get caught on the
housings.
(5) Securely fit flat cable (B) to the lead wire threading groove of housing (A) so that the cable will not get
caught on the housings.
(6) Fit the boss of the Forward/Reverse change-over lever on the upper part of the DC-Speed Control
Switch [35]<32> to the hole of Pushing Button (B) [36]<33> when remounting the DC-Speed Control
Switch [35]<32> on housing (A).
(7) Thread the lead wires of the LED light through the ribs of the housing as shown in the figure.
NOTE: The contact between the terminal support and battery may be hot when covered with
black metal oxides or when its plating is separated. In extreme cases, the battery and
product may be damaged. Replace the DC-Speed Control Switch [35]<32> (cord No.
332187) with a new one.
Reassembly
-8-
Stator FET PCB [37A]<34>
Connector cable (A)
Lead wire (red)
Machine Screw
(W/Sp. Washer) M3 x 5 [38]<35>
DC-Speed Control Switch [35]<32>
Connector cable (B)
Connector cable (B)
Flat cable (B)
Zip
Pull up
Connector
Connector
Capacitor
Lead wire (black)
A
C
LED light
A-A
Connector cable (A)
Cover connector
joint with
SUMITUBE(R).
B
B
A
C
Flat cable (B)
Controller [34]<31>
Apply silicon grease to
the whole connector.
RB
Y
RY
BR
BY
COLOR：R , B , Y COLOR：G , W , L
COLOR：R , B , Y COLOR：G , W , L
Connector Cable (A)
Connector Cable (B)
RB
Y
R
B
Y
R
BY
GW
L
GL
WG
WL
GW
L
G
W
L
G
WL
Fig.6 • Reassembly of the power supply and its related parts
Wiring diagram
Color combinations of Connector Cables (A) and (B)
(R: red, B: blue, Y: yellow, G: green, W: white, L: black)
-9-
Fig.8 • Reassembly of the power supply and its related parts
Thread lead wires through the
ribs of housing (A).
Lead wire (black)
Lead wire (red)
Fig.7 • Reassembly of the power supply and its related parts
Push connector cable and lead wires into
the lead wire threading grooves.
Lead wire threading
grooves
Push connector cable into the lead
wire threading grooves.
Screw boss
A
void flat cable (B) from being pressed
by screw boss.
DC-Speed Control Switch [35]<32>
Pushing Button (B) [36]<33>
Push lead wires into the lead wire
threading grooves.
Andere Handbücher für WH 14DBDL
5
Dieses Handbuch passt für folgende Modelle
3
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