Hitachi WR 22SA Technical And Service Manual
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Hitachi WR 22SA Technical And Service Manual

Impact wrench
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MODEL
WR 22SA
Hitachi
Power Tools
TECHNICAL DATA
IMPACT WRENCH
AND
WR 22SA
SERVICE MANUAL
W
LIST No. E707
Mar. 2005
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

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Summary of Contents for Hitachi WR 22SA

  • Page 1 MODEL WR 22SA Hitachi Power Tools TECHNICAL DATA IMPACT WRENCH WR 22SA SERVICE MANUAL LIST No. E707 Mar. 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 6906 MAKITA GDS24 BOSCH...

  • Page 3: Table Of Contents

    8. OTHER PRECAUTIONS ......................... 12 9. REPAIR GUIDE ..........................13 9-1. Disassembly ............................. 13 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 22SA...

  • Page 4: Product Name

    In addition, the Model WR 22SA has the more durable motor that is contained in the highly strong aluminum die- cast body and the handle-integrated plastic cylinder. The Model WR 22SA 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 Points

    4. SELLING POINTS Powerful motor Class-top tightening torque Novel design thanks to the optimally balanced design Most compact and lightweight in the class More durable double-insulated motor thanks to the highly strong (rigid) aluminum die-cast body! [ Patent pending ] Large bumper protects the outer frame Slip-resistant and...

  • Page 6: Selling Point Descriptions

    4-1. Selling Point Descriptions (1) Class-top tightening torque With the powerful motor and the computer analysis for optimum impact at tightening, the tightening torque of the Model WR 22SA is 610 N m, which is the highest level in this class. •...
  • Page 7 The grip of the Model WR 22SA is soft, slip-resistant and comfortable thanks to the soft material (elastomer resin) covered on the handle. The Model WR 22SA gives minimum fatigue to the operator's hand even if it is operated for a long time.

  • Page 8: Specifications

    5. SPECIFICATIONS 5-1. Specifications Model WR 22SA Item Ordinary bolt M14 (9/16") --- M24 (15/16") Capacity High tension bolt M16 (5/8") --- M22 (7/8") Tightening torque 610 N m 62.2 kgf cm (5,390 in-lbs.) • • Tip condition 19 mm (3/4") (Width across flat of the socket mounting portion)

  • Page 9: Optional Accessories

    5-2. Optional Accessories (1) Dimensions of each hexagon socket and applicable bolts 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) screw 23 mm...

  • Page 10: Comparisons With Similar Products

    6. COMPARISONS WITH SIMILAR PRODUCTS 6-1. Specification Comparisons <Table 1> Maker Model • HITACHI HITACHI WH 22 WR 22SA Item M 14 --- M 24 M 14 --- M 24 M 24 M 16 --- M 22 Ordinary bolt Capacity High-tension bolt...

  • Page 11: Tightening Torque

    6-2. Tightening Torque Figure 1 shows a comparison of tightening torque with the Model WH 22, C and B. WR 22SA WH 22 Tightening time (S) Bolt: M22 x 70 (F10T) high tension bolt Steel plate: SS34P, 30 mm in thickness Fig.

  • Page 12: Tightening Torque Characteristics When Using An Extension Cord

    Diameters and effective sectional areas of bolts <Table 3> Nominal diameter of bolt M14 x 2.0 M16 x 2.0 M18 x 2.5 M20 x 2.5 M22 x 2.5 M24 x 3.0 Effective sectional area 115.0 353.0 157.0 192.0 245.0 303.0 of bolt (mm Tightening torque according to strength grade of bolts kgf-cm <Table 4>...

  • Page 13: Precautions In Sales Promotion

    7-1. Safety Instructions In the interest of promoting the safest and most efficient use of the Model WR 22SA 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 attached to each tool.

  • Page 14: Tightening Torque Variation

    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 22SA 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. Take the following countermeasures against voltage reduction caused by the resistance of an extension cord and the load current.

  • Page 15: Temperature Rise

    7-4. Temperature Rise If the Model WR 22SA 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 outer frame of the main body becomes hot.

  • Page 16: 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 22SA. 9-1. Disassembly (1) Hammer Case Ass'y [3] (a) Removal of the Hammer Case Ass'y [3] Remove the four Seal Lock Hex.
  • Page 17 (2) Removal of the Spring [11] Push the click of the Hammer [8] with a hand press and keep it at the position where the Spring [11] is compressed fully. Remove the two Steel Balls D7.14 [7] from the steel ball guide at the cam portion of the Spindle [17] and the Hammer [8] with a flat-blade screwdriver.
  • Page 18 (3) Removal of the Armature [27] Remove the Seal Lock Hex. Socket Hd. Bolt M5 x 10 [47] from the Tail Cover [46] and remove the Tail Cover [46]. Remove the Brush Cap [53] and the Carbon Brushes [54]. Then the Armature [27] can be removed together with the Inner Cover [23] from the Housing Ass'y [56].

  • 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) Housing ass'y 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) Hammer Case Ass'y [3] Mounting the hammer (a) Put the thirty-eight 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 [17] 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 D7.14 [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 22SA Housing Ass'y Stator Handle Cover Switch Switch Adapter Cord Armature Cord Armor Ball Bearing (6200DD) Ball Bearing (608VV) Inner Cover Ball Bearing (6908ZZ) General Assembly...
  • Page 23 Hitachi Power Tools LIST NO. E707 ELECTRIC TOOL PARTS LIST IMPACT WRENCH 2005 • • Model WR 22SA (E1) 503 504 505...
  • Page 24 PARTS WR 22SA ITEM CODE NO. DESCRIPTION REMARKS USED 324-008 BUMPER 323-994 SEAL LOCK HEX. SOCKET HD. BOLT M5X45 324-006 HAMMER CASE ASS’Y 1 INCLUD. 1, 4, 5 971-028 O-RING (P-28) 324-007 METAL 324-013 ANVIL (A) 324-021 ANVIL (B) ASS’Y 1 INCLUD.
  • Page 25 PARTS WR 22SA ITEM CODE NO. REMARKS DESCRIPTION USED 958-308Z PILLAR TERMINAL (A) 324-023 SUPPORT (B) 961-419Z TERMINAL EXCEPT FOR USA, CAN, VEN, INA, SYR, KUW, HKG, SIN 608-VVM BALL BEARING 608VVC2PS2L NAME PLATE 323-997 TAIL COVER 877-839 SEAL LOCK HEX. SOCKET HD. BOLT M5X10 2...

  • Page 26: Standard Accessories

    STANDARD ACCESSORIES WR 22SA ITEM CODE NO. DESCRIPTION REMARKS USED 324-015 SIDE HANDLE ASS’Y INCLUD. 502-505 980-901 SIDE HANDLE 323-775 HANDLE HOLDER 324-016 HANDLE RING 980-903 SQUARE BOLT M8 324-014 CASE (B) OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 874-535 INCLUD.

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