Hitachi WH 14DM, Technical Data And Service Manual

Page 1: ...TECHNICAL DATA AND SERVICE MANUAL CORDLESS IMPACT DRIVER WH 14DM SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT LIST No F884 Jun 2003 W MODEL WH 14DM Hitachi Power Tools ...

Page 2: ... AND SERVICE MANUAL a symbol s is are used in the place of company name s and model name s of our competitor s The symbol s utilized here is are as follows Symbol Utilized Competitor Company Name Model Name DEWALT DW054 P MAKITA BTD 50SA C ...

Page 3: ...8 7 3 Number of Screws Driven 10 8 PRECAUTIONS IN SALES PROMOTION 11 8 1 Safety Instructions 11 8 2 Tightening Torque Inspection prior to Operation 13 8 3 Tightening Torque Variation 13 8 4 Suggestions and Precautions for the Efficient Use of the Charger 14 9 OTHER PRECAUTIONS 14 10 REPAIR GUIDE 15 10 1 Precautions in Disassembly and Reassembly 15 10 2 Precautions in Disassembly and Reassembly of ...

Page 4: ...le Markets Wood product assembly Tightening loosening of wood screws Construction industry Assembly of scaffolding roofing aluminum sashes fencing etc removal of plastic cones from concrete forms mounting removal of form ties drilling into the wood frames of concrete forms etc Manufacturing industry Assembly work for automobiles rolling stock shipbuilding agricultural machinery and tools industria...

Page 5: ...rvice life Compact Overall length of the Model WH 14DM compared with the following models C 11 mm 3 64 P 12 mm 3 64 Height of the Model WH 14DM compared with the following models C 40 mm 1 37 64 P 2 mm 5 64 Center height of the Model WH 14DM compared with the following models C 0 mm 0 P 2 mm 5 64 Weight of the Model WH 14DM compared with the following models C 220 g 485 lbs P 100 g 220 lbs Hook wi...

Page 6: ...bolts were tightened in 3 seconds with a hexagon socket 115 mm 4 3 64 long in the test The tightening torque of the Model WH 14DM is substantially higher than the previous model Wood screw 5 3 mm dia x 120 mm 1 64 x 4 23 32 length lauan Wood screw 4 2 mm dia x 90 mm 11 64 x 3 3 64 length lauan Tightening time may vary depending on hardness of the workpiece ambient temperature characteristics of th...

Page 7: ...comparison with P and by 11 mm 3 64 in comparison with C and it is equivalent to the previous 12 V product Model WH 12DH thanks to the downsized hammer case The weight of the Model WH 14DM is about 220 g 0 485 lbs lighter than C The actual weight of P is about 100 g 0 220 lbs lighter than WH 14DM Weight Catalog weight kg L Overall length mm Model A Center height mm H Height mm Actual weight kg WH ...

Page 8: ...les in the case of Model UC 14YF2 Nominal capacity 2 0 Ah Battery Type EB 1430H Sealed cylindrical nickel metal hydride batteries Nominal voltage DC 14 4V Nominal life Charging discharging approximately 500 cycles in the case of Model UC 14YF2 Nominal capacity 3 0 Ah 1 This torque is based on tightening an M12 15 32 bolt strength grade 12 9 for 3 seconds with a hexagonal socket 2 Main body does no...

Page 9: ...o No 2 No 3 Code No 992671 992672 Hexagon socket L B Stamped figures 996177 8 5 16 65 2 9 16 8 Stamped figures 5 mm Hexagon socket Part name L mm B mm Code No 985329 10 3 8 65 2 9 16 10 6 mm Hexagon socket 996178 12 15 32 65 2 9 16 12 5 16 Hexagon socket 996179 13 1 2 65 2 9 16 13 8 mm Hexagon socket 996180 14 9 16 65 2 9 16 14 10 mm Hexagon socket small type 996181 16 5 8 65 2 9 16 16 10 mm Hexag...

Page 10: ...64 x 9 19 64 27 1 1 16 1 98 4 4 lbs 71 Driver chuck Variable speed switch with forward reverse changeover lever DC magnet 14 4 27 EB 14B or EB 1430H EB 14B 2 0 EB 1430H 3 0 14 4 0 40 UC 14YF2 44 7 2 14 4 Plastic tool case Charger UC 14YF2 M 4 M 10 5 32 3 8 M 6 M 14 1 4 9 16 M 6 M 10 1 4 3 8 130 1325 kgf cm 1150 in lbs 0 2 300 0 3 000 2 1 4 6 lbs 133 1356 kgf cm 1177 in lbs 0 2 420 0 2 920 190 x 27...

Page 11: ...election of tightening torque T 9 8 k d p 100 T Appropriate tightening torque N m k Torque coefficient 0 17 d Nominal diameter for the screw mm p Recommended axial tightening force to be applied to the screw kgf p rated axial stress kgf mm2 x 0 8 x effective sectional area of the thread mm2 Strength grade and rated axial stress of threads Strength grade Rated axial stress kgf mm2 Material Heat tre...

Page 12: ...500 psi Tensile strength of the bolt 56 900 psi 300 250 150 200 100 0 0 6 8 10 12 14 9 16 15 32 3 8 5 16 1 4 Thread diameter 3000 2500 2000 1500 1000 500 2604 in lbs 2170 in lbs 1736 in lbs 1302 in lbs 868 in lbs 434 in lbs 0 N m kgf cm Strength grade 12 9 high strength bolt Strength grade 8 8 high strength bolt Strength grade 6 8 ordinary bolt Strength grade 4 8 ordinary bolt 16 mm 5 8 50 0 1 2 3...

Page 13: ... x 50 mm 5 32 x 1 31 32 soft wood Wood screw 4 2 mm dia x 90 mm 11 64 x 3 3 64 hard wood Wood screw 5 3 mm dia x 120 mm 1 64 x 4 23 32 hard wood Machine screw M8 x 16 mm Note 1 The Model WH 14DM is equipped with the larger hammer and the higher power motor for the higher tightening speed Although the higher tightening speed is realized the Model WH 14DM has the following disadvantage High startup ...

Page 14: ...ted on the unit If this order is reversed the charger may not function properly 4 Ensure the power source voltage is the same as that indicated on the Name Plate of the charger Use of any other power source DC outlet fuel powered generator etc will cause the charger to overheat and burn out 5 Do not use any voltage increasing equipment transformer etc between the power source and the charger If th...

Page 15: ...ir or replacement is necessary 10 Disposal of the Type EB 14B or EB 1430H Storage Battery Ensure that all customers understand that Type EB 14B or EB 1430H Storage Batteries should be turned in to any Hitachi power tool sales outlet or authorized service center when they are no longer capable of being recharged or repaired If thrown into a fire the batteries may explode or if discarded indiscrimin...

Page 16: ...ghtening torque decreases as the number of bolts tightened increases This phenomenon is caused by the decline in voltage output of the battery due to the increasing number of bolts tightened In particular the tightening torque decreases rapidly just before the battery is fully discharged As this phenomenon is an inherent drawback in any cordless impact driver salespersons are requested to ensure t...

Page 17: ...ld be advised to place the battery in a shaded area with a good airflow and allow sufficient cooling before recharging This phenomenon is common to all existing batteries which employ temperature sensitive overcharge devices The cooling time required before charging can be accomplished varies from a few minutes to about 30 minutes depending on the load duration of use and ambient temperatures 9 OT...

Page 18: ...ng the procedure shown in Figs 5 1 to 5 4 Be sure not to lose the two Steel Balls D3 97 9 in Anvil C 10 Hold the body and adjust the gap of the retaining ring to the groove of anvil C then insert a small flat blade screwdriver into the groove at an angle Press down the retainer with the small flat blade screwdriver Fig 5 2 Fig 5 1 1 2 Small flat blade screwdriver Anvil C 10 Retaining Ring 1 Retain...

Page 19: ...rom the J 297 base for washer S and support the end surface of Spindle E 18 With a hand press push down either of the raised faces of Hammer E 12 to compress Hammer Spring C 15 In this position extract the two Steel Balls D5 556 11 from the cam grooves of Spindle E 18 and Hammer E 12 with a small flat blade screwdriver or a similar tool Then slowly release the hand press and lift Hammer E 12 and W...

Page 20: ...k the three legs coming from the FET to avoid malfunction of the switch 9 Removal of the switch assembly Remove the two Machine Screws W SP Washer M3 x 5 37 that secure the flag terminal and then disconnect the internal wires purple and black of the Brush Block 29 from the DC Speed Control Switch 38 Note Do not disconnect the three FET internal wires soldered to the DC Speed Control Switch 38 10 R...

Page 21: ...ion should be given to the following items 1 Reassembly of the housing assembly a Be sure to follow the wiring diagram Fig 10 for proper wiring b When connecting the internal wires of the Brush Block 29 to the DC Speed Control Switch 38 fasten them with the Machine Screws W Sp Washer M3 x 5 37 paying attention to the direction of the flag terminal Fig 10 Note If the flag terminal is mounted in wro...

Page 22: ...ers 24 so that they fit into the Inner Cover 25 Fit the locking rib of Ring Gear C 21 to the concave portion of the Damper 24 Press fit the Armature DC 14 4V 26 into the Inner Cover 25 Adjust the convex portion of the Dust Guard Fin 28 to the concave portion of the Brush Block 29 See Fig 11 Adjust the notch for locking of Magnet C Ass y 27 to the protrusion of Housing A 35 See Figs 11 and 13 Posit...

Page 23: ...ne grease KS609 Shin Etsu Chemical Co Ltd to the contacting surfaces of the FET of the DC Speed Control Switch 38 and the Dust Guard Fin 28 then mount them to Housing A 35 Note The temperature of the FET may be high if the silicone grease is not applied Make sure that the three internal wires from the FET are passed above the DC Speed Control Switch 38 See Fig 14 Fig 13 Apply silicone rubber Align...

Page 24: ...mpress Hammer Spring C 15 On this condition mount the Stopper 17 onto the spindle shaft and then release the hand press 4 Mounting the hammer assembly to the housing Raise the housing assembled in step 2 and mount the hammer assembly to the housing being careful of proper engagement between the Idle Gear Set 2 pcs 19 of the hammer assembly check that Washer E 22 is mounted on Spindle E 18 and Ring...

Page 25: ...r Set 2 pcs 19 Cam groove and sliding section of Spindle E 18 Cam groove and oil groove of Hammer E 12 8 mm diameter hole of Anvil C 10 sliding section between Anvil C 10 and the metal and upper surface of the claw Two Steel Balls D5 556 11 Metal oil groove of the Hammer Case 8 b HITACHI MOTOR GREASE No 29 Two Steel Balls D3 97 9 Sliding section between Anvil C 10 and Guide Sleeve 4 10 Screw tight...

Page 26: ...Variable WH 14DM Work Flow Inner Cover Armature Magnet C Ass y Brush Block DC Speed Control Switch Hook Ass y Hammer Case Anvil C Ring Gear Housing A B Set General Assembly Hammer E Steel Ball Hammer Spring C Spindle E Idle Gear Set Needle Roller Ball Bearing 6901VV Guide Sleeve ...

Page 27: ...ST NO F884 CORDLESS IMPACT DRIVER Model WH 14DM 2003 6 5 E1 Hitachi Power Tools 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 501 502 37 41 42 43 44 45 46 47 48 49 40 ...

Page 28: ...ING 6901VVCMPS2L 1 24 322 143 DAMPER 1 25 319 908 INNER COVER 1 26 360 613 ARMATURE DC 14 4V 1 27 320 916 MAGNET C ASS Y 1 28 319 907 DUST GUARD FIN 1 29 320 876 BRUSH BLOCK 1 30 999 054 CARBON BRUSH 5X6X11 5 1 PAIR 2 31 319 918 BRUSH CAP 2 32 302 086 TAPPING SCREW W FLANGE D4X20 BLACK 7 33 NAME PLATE 1 34 HITACHI LABEL 1 35 322 074 HOUSING A B SET 1 36 CAUTION PLATE 1 37 994 532 MACHINE SCREW W S...

Page 29: ... 996 177 NON MAGNETIC HEX SOCKET 8MM 65L 1 606 985 329 NON MAGNETIC HEX SOCKET 10MM 65L 1 607 996 178 NON MAGNETIC HEX SOCKET 12MM 65L 1 608 996 179 NON MAGNETIC HEX SOCKET 13MM 65L 1 609 996 180 NON MAGNETIC HEX SOCKET 14MM 65L 1 610 996 181 NON MAGNETIC HEX SOCKET 16MM 65L 1 611 996 182 NON MAGNETIC HEX SOCKET 17MM 65L 1 612 996 185 NON MAGNETIC HEX SOCKET 15MM 65L 1 613 996 186 NON MAGNETIC HEX...

Page 30: ... 4 ITEM NO CODE NO DESCRIPTION REMARKS NO USED 6 03 WH 14DM Printed in Japan 030605N ...

Page 31: ......