Related Manuals for Hitachi WR 14DH
Summary of Contents for Hitachi WR 14DH
- Page 1 MODEL WR 14DH POWER TOOLS TECHNICAL DATA CORDLESS IMPACT WRENCH WR 14DH SERVICE MANUAL LIST No. F841 Aug. 2000 SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT...
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Page 2: Table Of Contents
8. OTHER PRECAUTIONS ......................19 9. REPAIR GUIDE ..........................20 9-1. Precautions in Disassembly and Reassembly ................20 9-2. Precautions in Disassembly and Reassembly of Battery Charger ..........26 10. STANDARD REPAIR TIME (UNIT) SCHEDULES ..............27 Assembly Diagram for WR 14DH ......................28... -
Page 3: Product Name
The current cordless impact wrenches Model WR 8DH (9.6 V) and WR 12DH (12 V) are well reputed on the market. Now, the new Model WR 14DH (14.4 V) is being introduced to respond to users' requests for a more powerful impact wrench with higher torque. -
Page 4: Selling Points
4. SELLING POINTS Model WR 14DH Cordless Impact Wrench 147 N • Higher tightening torque (1,500 kgf cm, 1,302 in-lbs.) • Compact and lightweight (2.2 kg, 4.85 lb.) Convenient holes for hanging Variable speed switch with electric brake for efficient operation... -
Page 5: Selling Point Descriptions
*: This value indicates the symmetric position of C with respect to the reference line of the Model WR 14DH. Remarks (1) The Model WR 14DH is easy to operate because the switch position is near to and parallel with the work center line. - Page 6 (4) Safe handle shape Compared with the previous WH 12D, the housing of the Model WR 14DH does not produce gaps caused by vibration because front and rear grip inserts [part name: grip (R) and grip (F), made of rubber] are provided at the juncture of the handle, and the housing is secured with two screws at the center of the handle to prevent the operator's hand from being pinched.
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Page 7: Specifications
5. SPECIFICATIONS 5-1. Specifications Model Cordless impact wrench WR 14DH Item Ordinary bolt M8 --- M16 (5/16" --- 5/8") Capacity High-strength bolt M8 --- M12 (5/16"--- 15/32") Tightening torque 147 N m (1,500 kgf cm, 1,302 in-lbs.) *1 • •... -
Page 8: Optional Accessories
<Applicable screws> <Tools> <Connecting tools> Square drive dimension: 12.7 m (1/2" square) Square drive dimension: 12.7 mm (1/2" square) WR 14DH Hex. socket hd. bolt Hex. socket Universal joint Extension bar Hex. socket hd. bolt and nut Socket for ducting... - Page 9 (2) Optional accessories for the Model WR 14DH Each dimension and applicable bolt for each hexagon socket Shape B Shape C Shape D Nominal diameter of applicable bolts Square Socket primary dimensions Dihedral drive (mm) Part Name Code No. Inch...
- Page 10 Socket primary dimensions Square Nominal diameter of applicable bolts Dihedral drive (mm) Inch Shape width Part Name Code No. dimension (high- (small (ordinary) screw H (mm) strength) type) 12 mm 955138 W 5/16" (5/16") (15/32") (2-3/64") (25/32") (1-11/32") (25/32") 21.5 13 mm 955139 (5/16")
- Page 11 Holster (Code No. 307824) Use the holster to hold the unit during its operation. Carefuly read the warnings attached to the holster for safe use. Hook (Code No. 308090) Use the holster to hold the unit during its operation. Carefuly read the instructions that come with the hook to learn how to use it. --- 9 ---...
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Page 12: Comparisons With Similar Products
6. COMPARISONS WITH SIMILAR PRODUCTS 6-1. Specification Comparisons Maker HITACHI Model WR 14DH Item WH 12D WR 12DH M8 -- - M16 M6 -- - M14 M12 -- - M16 M6 -- - M14 Ordinary bolt (5/16" - -- 5/8") (1/4"... -
Page 13: Tightening Torque
Tightening torque comparisons of Model WR 14DH with previous models are shown in Fig. 4. It should be noted that M16 (5/8") bolt (F10T) were utilized in the tests to ensure that the bolts were not stripped or distorted, even though such bolts are actually beyond the recommended maximum capacity of these models. - Page 14 6-2-2. Screw diameter and appropriate tightening torque Generally speaking, the appropriate tightening torque for a screw can be determined by the strength grade of the screw and the material tightened. Tables 1 and 2, and Fig. 5 below list data relative to the strength grade of various screws and the appropriate tightening torque.
- Page 15 6-2-3. Bolt tightening torque characteristics Figure 6 shows relationships between time and tightening torque for individual bolt types and sizes. While the data are useful for handy reference, actual tightening torque will vary depending on tightening conditions and other variables. For details, please refer to Para. 7-3, Tightening Torque Variation. (Note) The term "tightening time"...
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Page 16: Number Of Bolts Driven
Ordinary bolt (Cordless impact wrench) HITACHI HITACHI HITACHI Model Tightening condition WR 14DH WH 12D WR 12DH EB 14B EB 12B EB 12B Battery M10 (3/8") -
Page 17: Precautions In Sales Promotion
7-1. Safety Instructions In the interest of promoting the safest and most efficient use of Model WR 14DH by all our customers, it is very important that at the time of sale the salesperson carefully ensures that the buyer seriously recognizes the importance of the contents of the Handling Instructions, and fully understands the meaning of the precautions listed on the Caution Plate and Name Plate attached to each tool. - Page 18 Ensure that all customers understand that Type EB 14B or EB 1430H Storage Batteries should be turned into 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 indiscriminately, leakage of the cadmium compound contained in the battery may cause environmental pollution.
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Page 19: Tightening Torque Inspection Prior To Operation
7-2. Tightening Torque Inspection Prior to Operation As described and shown in Para. 6-2-3, the output tightening torque of which the Model WR 14DH is capable in excess of the rated tightening torque of certain bolts and screws. Accordingly, if the tightening time is prolonged for such bolts and screws, it could cause damage to their threads or, in the worst case, cause them to be sheared off. -
Page 20: Suggestions And Precautions For The Efficient Use Of The Charger
(2) Effects of low ambient temperatures The tightening torque required may be reduced at low ambient temperatures or under the influence of grease and different torque coefficients (dependent on manufacturing and finishing processes, and specified by bolt manufacturers). (3) Different bolt diameter Differences in bolt diameter will cause variation of the required levels of tightening torque. -
Page 21: Other Precautions
8. OTHER PRECAUTIONS (1) Check for cracks or other damage on the socket Cracks or any other faults on the socket are very hazardous. In addition, cracks or other damage to accessories will cause loss of tightening torque efficiency. Advise the customer to inspect accessories often, and ensure there are no abnormalities. -
Page 22: Repair Guide
9. REPAIR GUIDE WARNING : Without fail, remove the Model EB 14B or EB 1430H Battery from the main body before starting repair or maintenance work. Because the tool is cordless, if the battery is left in and the switch is activated inadvertently, the motor will start rotating unexpectedly, which could cause serious injury. - Page 23 Remove the hammer assembly from the J-297 base for washer (S) and support the end surface of the Spindle [13]. With a hand press, push down either of the raised faces of the Hammer [7] to compress Spring (A) [10]. In this position, extract the two Steel Balls D5.556 [6] from the cam grooves of the Spindle [13] and the Hammer [7] with a small flat-blade screwdriver or a similar tool.
- Page 24 9-1-2. Reassembly Reassembly can be accomplished by following the disassembly procedures in reverse. However, special attention should be given to the following items. (1) Reassembly of Housing (A) assembly (a) Be sure to follow the wiring diagram (Fig. 12-1) for proper wiring. (b) When connecting the internal wires of the Motor [22] to the DC-Speed Control Switch [31], fasten them with the Machine Screws (W/SP.
- Page 25 Motor Pinion Black Purple Terminal Projection of forward/ reverse lever Machine screw S-tight screw M3 x 5 D3.5 x 6 DC-speed control switch SW lead wire Terminal support Lead wire: Purple Lead wire: Black Fig. 10 --- 23 ---...
- Page 26 Greasing position of the Rear Damper [25] Inner Cover [19] Internal wire (purple) Groove (for purple internal wire) Groove (for black internal wire) Rear Damper [25] Internal wire (black) Apply silicone rubber. Fold the lead wire. Application of silicone rubber to the Inner Cover [19] Fig.
- Page 27 (3) Reassembly of the hammer assembly (a) Put Washer (S) [11] onto the shaft of the Spindle [13] and mount the Hammer [7] containing the thirty Steel Balls D3.175 [8], Washer (J) [9] and Spring (A) [10] to the Spindle [13]. (b) Align the top of the cam groove on the Spindle [13] with the steel ball guide groove on the Hammer [7] as illustrated in Fig.
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Page 28: Precautions In Disassembly And Reassembly Of Battery Charger
(7) Screw tightening torque 1.96 0.49 N•m (20 5 kgf•cm, 17.4 4.3 in-lbs.) Tapping Screw (W/SP. Washer) D4 x 35 • • • • • • • • • • • • • • • • 1.96 0.49 N•m (20 5 kgf•cm, 17.4 4.3 in-lbs.) Tapping Screw (W/Flange) D4 x 20 •... -
Page 29: Standard Repair Time (Unit) Schedules
10. STANDARD REPAIR TIME (UNIT) SCHEDULES Variable 60 min. MODEL Fixed Work Flow WR 14DH DC-speed Control Switch Housing (A).(B) Set Fin Ass'y Inner Cover O-ring (S-20) Damper Motor General Assembly Steel Ball Hammer Case Hammer Anvil (B) Spring (A) -
Page 30: Assembly Diagram For Wr 14Dh
LIST NO. F841 ELECTRIC TOOL PARTS LIST 2000 CORDLESS IMPACT WRENCH • • ( E1 ) Model WR 14DH --- 28 ---... - Page 31 WR 14DH PARTS ITEM CODE NO. DESCRIPTION REMARKS USED 306-305 TAPPING SCREW (W/SP. WASHER) D4X35(BLACK) 319-251 HAMMER CASE 985-209 PIN RETAINER 319-250 ANVIL (C) ASS'Y INCLUD.3,5 985-208 PLUNGER 959-154 STEEL BALL D5.556 (10 PCS.) 318-374 HAMMER 959-148 STEEL BALL D3.175 (10 PCS.)
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Page 32: Standard Accessories
STANDARD ACCESSORIES WR 14DH ITEM CODE NO. DESCRIPTION REMARKS USED CHAGER (MODEL UC 14YF2) 318-392 CASE OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 318-372 BATTERY EB 1430H (W/ENGLISH N.P.) CORNER ATTACHMENT ASS'Y INCLUD.603-619 955-300 HOUSING 955-301 METAL 955-302 SPINDLE... - Page 33 WR 14DH OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 955-141 HEX. SOCKET ASS'Y (LONG) 17MMX52L INCLUD.621,622 955-142 HEX. SOCKET ASS'Y (LONG) 19MMX52L INCLUD.621,622 955-149 HEX. SOCKET ASS'Y (LONG) 17MMX75L INCLUD.621,622 955-150 HEX. SOCKET ASS'Y (LONG) 19MMX75L INCLUD.621,622 955-143 HEX. SOCKET ASS'Y (LONG) 21MMX52L INCLUD.621,622...