Hitachi WR 16SA Technical Data And Service Manual
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Hitachi WR 16SA Technical Data And Service Manual

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MODEL
WR 16SA
Hitachi
Power Tools
TECHNICAL DATA
IMPACT WRENCH
AND
WR 16SA
SERVICE MANUAL
W
LIST No. E705
Feb. 2005
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

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Summary of Contents for Hitachi WR 16SA

  • Page 1 MODEL WR 16SA Hitachi Power Tools TECHNICAL DATA IMPACT WRENCH WR 16SA SERVICE MANUAL LIST No. E705 Feb. 2005 SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT...
  • Page 2 REMARK: Throughout this TECHNICAL DATA AND SERVICE MANUAL, symbols are used in the place of company names and model names of our competitors. The symbols utilized here are as follows: Competitor Symbol Utilized Company Name Model Name TW0350 MAKITA GDS18E BOSCH DW290 DEWALT...

  • Page 3: Table Of Contents

    8. OTHER PRECAUTIONS ....................... 13 9. REPAIR GUIDE ..........................14 9-1. Disassembly ........................... 14 9-2. Reassembly ............................ 16 9-3. Insulation Tests ..........................18 9-4. No-load Current Value ........................18 10. STANDARD REPAIR TIME (UNIT) SCHEDULES ..............19 Assembly Diagram for WR 16SA...

  • Page 4: Product Name

    The Model WR 16SA is powerful and novel thanks to the 3-D CAD engineering as well as the double-layer molding, improved handle grip and large bumper to plainly differentiate it from the competitors.

  • Page 5: Selling Point Descriptions

    4-1. Selling Point Descriptions (1) Class-top tightening torque With the powerful motor and the computer analysis, the Model WR 16SA gives optimum impact at tightening screws and the tightening torque is the highest level in this class. (2) Stronger screw connection thanks to the cylindrical housing containing an insert screw...
  • Page 6 (5) Housing is covered with elastomer entirely The Model WR 16SA gives no scratch on the floor etc. where it is placed because the housing is covered with elastomer entirely. In addition, the elastomer-covered housing prevents the Model WR 16SA from slipping on a slanted surface such as a roof.

  • Page 7: Specifications

    5. SPECIFICATIONS 5-1. Specifications Model WR 16SA Item Ordinary bolt M12 (15/32") --- M22 (7/8") Capacity High-strength bolt M12 (15/32") --- M16 (5/8") Tightening torque 360 N m 3,670 kgf cm (3,180 in-lbs.) • • Tip condition 12.7 mm (1/2") (Width across flat of the socket mounting portion)

  • Page 8: Optional Accessories

    5-2. Optional Accessories (1) Each dimension and applicable bolt for each hexagon socket Shape B Shape C Shape D Square Socket primary Nominal diameter of applicable bolts Dihedral Code drive Part dimensions (mm) width Inch dimension name High-tension H (mm) Sq (mm) (Ordinary) (Small type)
  • Page 9 (3) Extension bar (Code No. 873633) (4) Corner attachment (EW-14R) (5) Universal joint (Code No. 986062) (6) Side handle (Code No. 323774) --- 6 ---...

  • Page 10: Comparisons With Similar Products

    6-1. Specification Comparisons <Table 1> Maker Model • HITACHI HITACHI WH 16 WR 16SA Item M 12 --- M 22 M 12 --- M 20 M 6 --- M 18 M 12 --- M 22 M 18 Ordinary bolt Capacity...

  • Page 11: Tightening Torque

    6-2. Tightening Torque Figures 1 and 2 show comparisons of tightening torque with the conventional Model WH 16, P, C and B. WR 16SA kgf . cm 3500 (3035 in-lbs.) 3000 (2602 in-lbs.) WH 16 2500 (2168 in-lbs.) 2000 (1734 in-lbs.) 1500 (1301 in-lbs.)

  • Page 12: Appropriate Tightening Torque For Bolts

    6-3. Appropriate Tightening Torque for Bolts Generally speaking, the appropriate tightening torque for a bolt can be determined by the strength grade of the bolt and the material tightened. Tables 2, 3 and 4 below list data relative to the strength grade of various bolts and the appropriate tightening torque.

  • Page 13: Tightening Torque Characteristics When Using An Extension Cord

    7-1. Safety Instructions In the interest of promoting the safest and most efficient use of the Model WR 16SA 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 14: Tightening Torque Inspection Prior To Operation

    The tightening torque of an impact wrench is influenced by voltage. For example, the tightening torque will be reduced to about 90% if the Model WR 16SA is operated with 90% of the rated voltage. The line voltage may be reduced by the use of a long extension cord depending on the work sites.

  • Page 15: Temperature Rise

    7-4. Temperature Rise If the Model WR 16SA is used for tightening bolts which require long time to be tightened continuously, it will cause temperature rise of the motor and burnout subsequently. Advise the customer to perform no-load operation for several minutes to cool the motor if the outside of the main body becomes hot.

  • Page 16: 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 and decrease the tightening torque. Advise the customer to ensure that there are no abnormalities on the socket before operation. (2) Socket dimensions Without fail, utilize an appropriate socket which matches the bolt dimensions.

  • Page 17: Repair Guide

    The procedures and the precautions in disassembly and reassembly are described below. The [bold] numbers correspond to the item numbers in the Parts List and the exploded assembly diagram of the Model WR 16SA. 9-1. Disassembly (1) Removal of the hammer case assembly (a) Removal of the Hammer Case Ass'y [3] Remove the four Seal Lock Hex.
  • Page 18 [10] [11] [12] [16] Fig. 6 (3) Removal of the Armature [25] Remove the Tapping Screw (W/Flange) D4 x 20 (Black) [49] from the Tail Cover [48] to remove the Tail Cover [48]. Remove the Brush Cap [55] and the Carbon Brushes [56]. Then the Armature [25] can be removed together with the Inner Cover [21] from the Housing Ass'y [58].

  • Page 19: Reassembly

    9-2. 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 the housing assembly Mounting the switch Pay attention to the relationship between the terminal numbers of the Switch [36] and the colors of the internal wires.
  • Page 20 (2) Reassembly of the hammer case assembly Reassembly of the hammer (a) Put the thirty Steel Balls D3.97 [9] in between the Hammer [8] and the Hammer Washer [10]. (b) Mount the Spring [11] and the Spring Seat [12] to the Hammer [8] then insert the Spindle [16] into it. Push the click of the Hammer [8] with a hand press and keep it at the position where the Spring [11] is compressed fully.

  • Page 21: Insulation Tests

    (5) Grease Greasing locations (a) Apply grease (Doubrex 251) to the following locations. Spindle [17]: Cam groove, sliding section and engaged portion with the Anvil [6] Hammer [8]: Cam groove, sliding section and the click Steel Balls D6.35 [7] Steel Balls D3.97 [9] Hammer Washer [10] Sliding section of the Spring Seat [12] Inner circumference of the metal in the Hammer Case Ass'y [3]...

  • Page 22: Standard Repair Time (Unit) Schedules

    10. STANDARD REPAIR TIME (UNIT) SCHEDULES Variable MODEL 60 min. Fixed Work Flow WR 16SA Housing Ass'y Stator Handle Cover Switch Switch Adapter Cord Armature Cord Armor Ball Bearing (6000DD) Ball Bearing (608VV) Inner Cover Ball Bearing (6907ZZ) General Assembly...
  • Page 23 Hitachi Power Tools LIST NO. E705 ELECTRIC TOOL PARTS LIST IMPACT WRENCH 2004 • • Model WR 16SA (E1) 503 504 505...
  • Page 24 PARTS WR 16SA ITEM CODE NO. DESCRIPTION REMARKS USED 323-767 BUMPER 323-753 SEAL LOCK HEX. SOCKET HD. BOLT M5X35 323-765 HAMMER CASE ASS’Y 1 INCLUD. 1, 4, 5 318-704 O-RING (M) 323-766 METAL 323-773 ANVIL (G) TYPE FOR W/O PLUNGER (A), PIN RETAINER (A) 985-207 ANVIL (B) ASS’Y...
  • Page 25 PARTS WR 16SA ITEM CODE NO. REMARKS DESCRIPTION USED 323-780 NOISE SUPPRESSOR ASS’Y (W/RESISTOR) INCLUD. 39, 40, 43 FOR SAF, NZL, AUS, AUT, GBR, FRA, FRG, ITA, HOL, BEL, ESP, FIN, SUI, CHN 930-153 SUPPORT (B) FOR NOISE SUPPRESSOR ASS’Y (W/RESISTOR)

  • Page 26: Standard Accessories

    STANDARD ACCESSORIES WR 16SA ITEM CODE NO. DESCRIPTION REMARKS USED 323-774 SIDE HANDLE ASS’Y INCLUD. 502-505 FOR SAF, NZL, AUS, AUT, GBR, FRA, FRG, ITA, HOL, BEL, ESP, FIN, SUI, CHN 980-901 SIDE HANDLE FOR SIDE HANDLE ASS’Y 323-775 HANDLE HOLDER FOR SIDE HANDLE ASS’Y...
  • Page 27 OPTIONAL ACCESSORIES WR 16SA ITEM CODE NO. REMARKS DESCRIPTION USED 323-776 HANDLE RING 955-153 UNIVERSAL JOINT PIN CORNER ATTACHMENT EW-14R 1 INCLUD. 652-668 955-300 HOUSING 955-301 METAL 955-302 SPINDLE 945-251 HITACHI LABEL 955-303 BEARING RACE 955-304 NEEDLE THRUST BEARING (NTA-1413)
  • Page 28 WR 16SA ITEM CODE NO. DESCRIPTION REMARKS USED Printed in Japan --- 6 --- 12 -- 04 (041230N)

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