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Hitachi Koki WH 18DD, Service Manual

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Hitachi Koki WH 18DD Service Manual Download Page 11

-10- 

• Connecting diagram 

LED 

M 

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 

• Wiring diagram

 

Push the internal wire into this groove. 

LED 

[32] 

DC-speed control switch 

Summary of Contents for WH 18DD

Page 1: ... reassembly 1 Disassembly 1 Reassembly 4 Type of silicone rubber 8 Lubrication points and type of lubricant 8 Tightening torque 9 Checking after reassembly 9 No load current 9 Wiring diagram 10 2 Precautions on disassembly and reassembly of the charger 10 CONTENTS Page W Power Tools Service Manual CONFIDENTIAL Jul 2020 Overseas Sales Management Dept WH 18DD ...

Page 2: ...e Retaining Ring 2 Washer D 3 Guide Spring D 4 and Guide Sleeve D 5 in this order with a small flat blade screwdriver Do not work too quickly Be careful not to let the Retaining Ring 2 pop up and do not lose the two Steel Balls D3 5 9 in the opening of the Anvil 10 Disassembly REPAIR GUIDE Opening of the Retaining Ring 2 2 Insert the edge of a small flat blade screwdriver under the end of the Reta...

Page 3: ...ly detached from the Hammer Case 7 on the J 297 base for washer S special purpose tool Code No 317063 Push down the end of the Spindle 18 with a hand press or similar tool to compress the Hammer Spring 15 and then use a small flat blade screwdriver or similar tool to take out Stopper A 17 in this state Release the hand press 2 Remove the hammer assembly from the J 297 base for washer S Hold the en...

Page 4: ...ner cover Detach Ring Gear A 23 and O ring 24 from the Inner Cover 26 and then use a small flat blade screwdriver to remove Damper A 25 NOTE Be careful not to damage the O ring 24 Removal of the inner cover 23 24 21 25 26 22 ...

Page 5: ...sion of the direction selector lever of the switch into the hole of the Pushing Button 30 Insert the brown internal wire into the internal wire threading groove first then insert the orange internal wire blue internal wire 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 exteri...

Page 6: ...Set 2 pcs 19 and two Needle Rollers A 20 to the Spindle 18 and insert Washer E 21 to assemble the hammer assembly 6 Press fit the Ball Bearing 6901VV 22 into the Inner Cover 26 and fit two Dampers A 25 into the Inner Cover 26 Then fit the O ring 24 into Ring Gear A 23 and fit the retaining rib of Ring Gear A 23 into the concave portion of Damper A 25 7 Check the hammer assembly whether Washer E 21...

Page 7: ...ner receptor of the housing as shown in the figure below Check whether the Hammer Case 7 is properly inserted into the housing If the Hammer Case 7 does not fit into the specified groove of the housing or if the ribs of the Inner Cover 26 are not positioned at 90 relative to the retaining tabs of the Hammer Case 7 reassemble it The Models WH 18DD and WH 18DDX are structured so that the Hammer Case...

Page 8: ... 7 Make sure the Hammer Case 7 is securely fitted to housing A Retaining tabs Mounting the hammer case Make the retaining tabs of the Hammer Case 7 touch housing A here ...

Page 9: ...necessary Item Registered part name Net weight Code No Three Bond 1211 Silicone rubber 100 g 306927 Apply specified amount of grease to the following portions MOLUB ALLOY 777 1 Convex portion 8 mm in dia on the Anvil 10 Sliding portion between the Anvil 10 and the needle bearing Two Steel Balls D5 556 11 Cam groove oiled groove and tabs on the Hammer 12 Cam groove and sliding portion of the Spindl...

Page 10: ... SEP 3A Grease SEP 3A 100 g 100 g 930035 Grease SEP 3A 2 5 kg 2 5 kg 930038 ATTOLUB MS NO 2 Grease Attolub MS No 2 500 g 500 g 302922 Item No Part name No used Tightening torque N m kgf cm 27 Tapping Screws W Flange D3 x 16 Black 9 1 3 0 3 13 3 After reassembly check the following 1 Check that the Models WH 18DD and WH 18DDX run smoothly and start stop change speed and change direction securely 2 ...

Page 11: ...k 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 Wiring diagram Push the internal wire into this groove LED 32 DC speed control switch ...

Page 12: ...M O D E L WH18DD Rev 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 21 22 23 24 25 26 27 28 34 33 29 30 32 507 509 508 510 505 511 501 502 504 501 31 506 503 ...

Page 13: ...RGER MODEL UC18YFSL 1 502 329897 BATTERY COVER 1 503 992671 DRIVER BIT B NO 2 50L 1 FOR EUROPE AUS NZL 504 983006 DRIVER BIT NO 2 65L 1 FOR CHN TPE SIN MAL 505 336642 CASE 1 506 376358 HOOK SET 1 507 336471 CASE ASS Y STACKABLE 2 1 INCLUD 508 510 508 336472 LATCH 4 509 336473 HANDLE 1 510 336474 HINGE 2 511 376502 INNER TRAY 1 601 992672 DRIVER BIT B NO 3 50L 1 FOR EUROPE AUS NZL 602 983011 DRIVER...

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