Hitachi WF 4V, Service Manual

Page 1: ...POWER TOOLS TECHNICAL DATA AND SERVICE MANUAL AUTOMATIC SCREW DRIVER WF 4V SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT LIST No 0783 Nov 1999 W MODEL WF 4V ...

Page 2: ...CAL DATA 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 Symbols Utilized Competitors Company Name Model Name MAKITA 6830 C ...

Page 3: ...ESHOOTING 10 8 1 Troubleshooting Guide 10 9 PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY 12 9 1 Disassembly and Reassembly of the Feeder Unit and Handling Precautions 12 9 1 1 Disassembly 12 9 1 2 Reassembly 12 9 1 3 Tightening Torque 13 9 1 4 Confirmation After Reassembly 13 9 2 Precautions in Disassembly and Reassembly of the Main Body 13 9 2 1 Disassembly 13 9 2 2 Reassembly 15 9 2 3 Insulation Te...

Page 4: ...ed and retightening protruded screws The new functions and higher performance of this multi purpose screwdriver which uses Hitachi s innovative technology assure greater demand and increased sales in this category of products 3 APPLICATIONS Continuous drywall screw driving by using collated screws or screw strips Driving various individual screws and bolts with the collated screw strip attachment ...

Page 5: ...Selling Point Descriptions 1 An impact mechanism that allows screw tightening with a smaller thrust plus our unique collated screw feed attachment The WF 4V employs an impact mechanism which is capable of tightening screws with a smaller thrust than with the claw clutch system used for competitors screwdrivers The way it works is schematically illustrated in Fig 2 With the impact system on the con...

Page 6: ... disconnected from the receptacle prior to the attachment removal 1 Hitachi WF 4V 2 C Attachment mechanism Instructions Holding the main unit with one hand turn the collated screw feed attachment with the other in the direction indicated by the arrow in Fig 3 1 Register the mark on the main unit with the mark on the attachment and remove by pulling it in the direction indicated in Fig 3 2 Loosen t...

Page 7: ...4 Impact rate Single phase AC commutator motor Without cord Packaged Packaging Standard accessories Weight Type and number of screws Power supply Power input No load rotation speed Center height Housing Polyamide resin Slider A B and C Polycarbonate resin Slider Case A and B Polycarbonate resin Belt Guide A and B Polycarbonate resin Variable speed trigger switch with forward reverse changeover lev...

Page 8: ...5 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 Hexagon socket 996182 17 21 32 65 2 9 16 17 10 mm Hexagon socket 996197 21 13 16 166 6 17 32 21 1 2 Hexagon long socket Woodworking drill bit Code No 959183 14 mm dia 35 64 83 mm 3 17 64 Fig 4 Fig 5 Table 2 Table 3 Fig 6 D...

Page 9: ... 4 000 1 8 4 0 lbs 1 78 3 92 lbs 82 Clutch type 345 361 13 19 32 14 7 32 135 5 5 16 80 3 5 32 23 4 2 29 N m 1 69 ft lb Plastic case Phillips bit Hook Top adjuster No 1 Top adjuster No 2 Hitachi WF 4DY 4 5 32 25 41 1 1 5 8 DC 12V 0 2 000 2 0 4 4 lbs 2 04 4 50 lbs 70 Impact type 369 378 14 17 32 14 7 8 202 7 15 16 73 2 7 8 17 4 1 71 N m 1 26 ft lb Plastic case Phillips bit Hook Charger Battery 6 2 C...

Page 10: ...ons to be able to offer appropriate guidance to the customer during sales promotion B Nameplate Each tool is provided with a Nameplate which lists the following basic safety precautions in the use of the tool 1 For Europe except Germany Australia and New Zealand CAUTION Read thoroughly HANDLING INSTRUCTIONS before use 2 For Germany ACHTUNG Bedienungsanleitung vor Inbetriebnahme lesen 7 2 Precautio...

Page 11: ...g and mounting difficulty Ensure these parts are cleaned frequently In particular the powder tends to easily stick when working with the screwdriver held upward 5 The small hole on either side of the handle section is important for ventilating gases Ensure that this hole is not blocked 6 Reference for tightening depth This screwdriver is designed to adjust the tightening depth by turning the Knob ...

Page 12: ...rive Screws Advise your customers that to tighten Posi Drive Screws they should use only the optional Posi Drive Screw Bit specially designed for the WF 4V As for the WF 4V as the bit engages the screw while it s turning the use of conventional Posi Drive Screw Bits which are not designed for this type of service may result in cracked or rounded out screws as screw driving may proceed without comp...

Page 13: ...llating Screws or collating tape are snagged or scraping Collating tape is deformed or cut Feeder unit Sprocket pawl is damaged Link piece is damaged Test Turn knob counterclockwise and test drive screw Check length of driver bit Length 114 mm 4 1 2 Check for wear at the face of the driver bit Check pressure during driving Check if specified screws are used Check if specified screws are properly m...

Page 14: ...tance of slider ass y C Broken or weak slider spring Remedy Remove burrs or clean out dust Replace defective parts Set screws correctly Remove burrs or clean out dust Install appropriate top adjuster for the screw length Refer to Item 3 Refer to Item 3 Remove burrs or clean out dust Replace defective parts Replace defective parts Symptom Screws are not fed Screws are bent during driving Slider doe...

Page 15: ...nge D4 x 20 13 to prevent it from jumping out Also take care not to lose the Roller 10 housed in the Slider Case b Loosen the two Tapping Screws W Flange D4 x 25 4 securing the Sprocket 3 Spring B 8 Slider Ass y C 1 Bit Guide 6 and Slider B 1 and remove them 9 1 2 Reassembly Simply reverse the disassembly procedure while observing the following precautions 1 Make sure that the joint between the Sl...

Page 16: ... secured to Housing B After Housing B has been removed the parts inside can be removed individually or subassemblies 2 Removal of mechanical parts Lift Housing A while holding Anvil M 29 and Ball Bearing 39 of Spindle A and the Anvil section and Hammer A 31 and Spindle A 38 sections can be separated from each other Then remove the Second Pinion Ass y Take care not to lose Washer A 40 a Remove Anvi...

Page 17: ...ut b Removal of Spring Compress Spring 34 at one of the lugs at the Hammer end by hand and also Stopper A 35 rubber at end face of Hammer A 31 While maintaining the pressure pull out the Steel Ball 30 5 55 mm dia 7 32 under the cam groove in Spindle A 38 and Hammer A 31 with a small slotted flat blade screwdriver and remove it from the Steel Ball receiving groove Then release the pressure and pull...

Page 18: ... 38 contacted b Bring the apex of the cam groove provided in Spindle A 38 in Fig 15 on page 14 into alignment with the Steel Ball receiving groove in Hammer A 31 Press down by hand one of the lugs at the Hammer end to compress Spring 34 and compress Stopper A 35 at end face of the Hammer A 31 until it rests on Spindle A 38 to support it c Fit the two Steel Balls 30 5 55 mm dia 7 32 into the Steel ...

Page 19: ...rease sealing b When replacement of Housings A and B is not required apply silicone rubber ThreeBond 1221 Code No 306927 to the Oil Seal 12 x 18 x 3 22 and the spigot joint section projection of Housing A shaded areas in Fig 19 to ensure grease sealing Fig 18 Application area Application area Housing B Housing A Fig 19 Application area Application area Housing B Housing A Application area ...

Page 20: ...ed in Fig 20 c Wiring of reversing switch As illustrated in Fig 21 insert the lead wire brown coming from the stator into the terminal marked 1 of the reversing switch and the lead wire yellow into terminal 2 Insert the lead wire brown coming from the carbon brush into the terminal 3 and the lead wire brown into the terminal 4 After insertion pull each lead wire slightly to check that the lead wir...

Page 21: ...sure that the wiring does not contact the armature b Mount housing B and handle cover being careful not to catch the internal wires Fig 23 Wiring diagram Fig 24 Noise suppressor Blue Blue Blue Brown Brown Switch Cord 1 Cord 2 Red Yellow Reversing switch Blue Red Yellow A Wiring of stator viewed from A ...

Page 22: ... Anvil M 29 g The sliding surface between Anvil M 29 and the Metal D20 x 16 24 h Hammer A 31 cam groove i Spindle A 38 and Anvil M 29 or their splined portion j The Steel Balls 30 5 55 mm dia 7 32 k Anvil M 29 vane Hitachi motor grease No 29 Code No 930035 tube or 930037 can l Tooth surfaces of the Armature Ass y 70 and First Gear 47 m The Steel Balls 28 3 175 mm dia 1 8 to be fitted into Anvil M ...

Page 23: ...fail that the insulation resistance measurement and dielectric strength test are conducted between the plug blade and some portion of the external metal frame such as the gear cover Never carry out these tests between the two blades of the plug with main switch turned ON This could cause burning out of the control element in the switch 9 2 4 No load Current Value After no load operation for 30 min...

Page 24: ...ing B Link Piece Roller Slider Case A B Set Stopper Bolt M5 x 50 Knob Spring 60 50 Oil Seal Metal Rubber Washer Armature Ass y with Ball Bearing Top Adjuster A B Set Fin Ass y Terminal C Guide Sleeve A Hammer Spring Stopper A Anvil G Housing A B Set Stator A Spindle Ball Bearing 608VV Metal Gear Ball Bearing 608VV First Gear Ball Bearing B MR126 Switch Cord General Assembly ...

Page 25: ... 22 Assembly Diagram for WF 4V ...

Page 26: ... SLEEVE A 1 22 314 271 OIL SEAL 12X18X3 1 23 314 272 O RING A 1 24 314 270 METAL D20X16 1 25 314 273 O RING B 1 26 302 328 RUBBER WASHER 1 27 302 329 WASHER F 1 28 959 148 STEEL BALL D3 175 10 PCS 2 29 318 158 ANVIL M 1 30 959 154 STEEL BALL D5 556 10 PCS 2 31 314 269 HAMMER A 1 32 959 155 STEEL BALL D3 97 10 PCS 21 33 302 331 WASHER G 1 34 312 413 SPRING 1 35 314 268 STOPPER A 1 36 941 732 WASHER...

Page 27: ...RMINAL 2 FOR CORD 62 949 566 LOCK NUT M5 10 PCS 1 63 953 327 CORD ARMOR D8 8 1 64 500 439Z CORD 1 CORD ARMOR D8 8 65 937 631 CORD CLIP 1 66 305 812 TAPPING SCREW W FLANGE D4X16 BLACK 2 67 609 VVM BALL BEARING 609VVC2PS2L 1 68 958 915 WASHER A 1 69 306 348 FAN 1 70 360 365E ARMATURE ASS Y 220V 230V 1 INCLUD 69 71 340 453E STATOR A 230V 1 72 982 631 WASHER A 1 73 318 157 BRUSH TERMINAL 1 74 306 151 ...

Page 28: ... 604 996 177 NON MAGNETIC HEX SOCKET 8MM 65L 1 605 985 329 NON MAGNETIC HEX SOCKET 10MM 65L 1 606 996 178 NON MAGNETIC HEX SOCKET 12MM 65L 1 607 996 179 NON MAGNETIC HEX SOCKET 13MM 65L 1 608 996 180 NON MAGNETIC HEX SOCKET 14MM 65L 1 609 996 185 NON MAGNETIC HEX SOCKET 15MM 65L 1 610 996 181 NON MAGNETIC HEX SOCKET 16MM 65L 1 611 996 182 NON MAGNETIC HEX SOCKET 17MM 65L 1 612 996 186 NON MAGNETIC...