Hitachi H 25PV Technical Data And Service Manual
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Hitachi H 25PV Technical Data And Service Manual

Hitachi H 25PV Technical Data And Service Manual

Demolition hammer
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MODEL
H 25PV
Hitachi
Power Tools
TECHNICAL DATA
DEMOLITION HAMMER
H
AND
H 25PV
SERVICE MANUAL
May 2004
LIST No. E477
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

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Summary of Contents for Hitachi H 25PV

  • Page 1 MODEL H 25PV Hitachi Power Tools TECHNICAL DATA DEMOLITION HAMMER H 25PV SERVICE MANUAL May 2004 LIST No. E477 SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT...
  • Page 2 REMARK: Throughout this TECHNICAL DATA AND SERVICE MANUAL, a symbol is used in the place of company name and model name of our competitor. The symbol utilized here is as follows: Competitor Symbol Utilized Model Name Company Name HK1810 MAKITA...

  • Page 3: Table Of Contents

    8-5. Adjusting Mechanism for Tool Swivel Angle .................. 10 9. REPAIR GUIDE ..........................11 9-1. Precautions and Suggestions for Disassembly and Reassembly of Main Body ......11 10. STANDARD REPAIR TIME (UNIT) SCHEDULES ..............20 Assembly Diagram for H 25PV...

  • Page 4: Product Name

    Hitachi Demolition Hammer, Model H 25PV 2. MARKETING OBJECTIVE The Model H 25PV is a compact demolition hammer intended for light-duty jobs such as stripping mortar and tiles, and allows use of SDS-plus shank tools. The main specifications are as follows: (1) High chipping and demolishing performance with low vibration and low noise level.

  • Page 5: Selling Point Descriptions

    Conventional mechanism for prevention of idle hammering is to open and close the air holes according to the movement of the striker. The Model H 25PV has air holes located at the position unaffected by the rebound of the striker at no load. The air holes are opened and closed by the movement of sleeve (A) provided around the cylinder that interlocks with the tool and the second hammer to prevent idle hammering.

  • Page 6: Specifications

    5. SPECIFICATIONS Power source Single-phase AC 50/60 Hz Voltage 110 V, 230 V, 240 V Motor type AC single-phase series commutator motor Insulation structure Double insulation Enclosure Materials : Aluminum alloy die casting (Crank case, cylinder case and gear cover) Polycarbonate resin (Housing) Nylon resin (Cylinder case cover, crank case cover, tail cover, handle)

  • Page 7: Optional Accessories

    5-1. Optional Accessories 5-1-1. Demolition work (1) Bull point (square type) (2) Bull point (round type) Overall length Code No. 250 mm (10") Bull point (square type) 303046 250 mm (10") Bull point (round type) 316656 5-1-2. Groove digging and edging work (1) Cold chisel (2) Cutter Overall length...
  • Page 8 5-1-4. Grease for impact drill 30 g (1 oz) Tube 70 g (2.5 oz) Tube 500 g (1.1 lbs.) Can Code No. 981840 Code No. 980927 Code No. 308471 (Note) Code numbers listed above are subject to change. Please refer to periodic Technical News Bulletins. --- 5 ---...

  • Page 9: Comparisons With Similar Products

    6. COMPARISONS WITH SIMILAR PRODUCTS 6-1. Specification Comparisons HITACHI Maker H 25PV Model name H 30PV Power input 0 to 4.0 0 to 5.2 0 to 3.9 Impact energy per stroke Full-load impact rate 0 to 3,200 0 to 3,800...

  • Page 10: Precautions In Sales Promotion

    7. PRECAUTIONS IN SALES PROMOTION In the interest of promoting the safest and most efficient use of the Model H 25PV Demolition Hammer by all of 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 11: Reference Information

    8. REFERENCE INFORMATION Structure: Crank case cover Striker Connecting rod Crank shaft O-rings Second hammer Piston Cylinder Air chamber Armature Fig. 3 8-1. Striking Operation The rotation of the armature is transferred to the crank shaft and connecting rod, which in turn cause the piston to reciprocate inside the cylinder.

  • Page 12: Idling-Proof Mechanism

    8-2. Idling-proof Mechanism When the tool is released from the concrete surface, sleeve (A) and the second hammer are forcibly moved to the position illustrated in Fig. 4 by spring (A), and the striker moves out of striking position. When this occurs, the air holes located at the position unaffected by the rebound of the striker at no load are opened and the pressure within the air chamber remains unchanged even though the piston continues to reciprocate, thereby preventing striking operation.

  • Page 13: Tool Retainer

    8-4. Tool Retainer The Model H 25PV is equipped with a slide-type tool retainer. Tools can be attached and detached just by pulling grip. While pulling grip in direction, insert the tool in the hole of the front cap (Fig.6). Adjust the groove position by turning the tool and push it in to the end.

  • Page 14: Repair Guide

    9. REPAIR GUIDE 9-1. Precautions and Suggestions for Disassembly and Reassembly of Main Body The numbers in [Bold] correspond to the item numbers in the Parts List and exploded assembly diagrams. 9-1-1. Disassembly Retainer disassembly Pull the Grip [2] fully in the arrow direction as shown in Fig. 9 and remove the Front Cap [1] (since the Front Cap [1] is made of rubber and engaged firmly with the Cylinder [24], pull it strongly to remove).
  • Page 15 Cylinder case and cylinder disassembly Remove the Seal Lock Hex. Socket Hd. Bolts M6 x 22 [10] fixing the Cylinder Case [9], then the Cylinder Case [9] can be removed from the Crank Case [46], and the Thrust Washer [25] and Spring (A) [22] can be removed between the Crank Case [46] and the Cylinder Case [9] (Fig.
  • Page 16 Inside cylinder disassembly Remove the Striker [33] and the Slide Ring [32] from inside Cylinder [24] (Fig. 13). Remove the Stopper Ring [31] from the groove inside Cylinder [24] by striking the Stopper Ring [31] through the hole provided on Cylinder [24].
  • Page 17 First gear and crank shaft disassembly Remove the Hex. Socket Hd. Bolts (W/Flange) M5 x 16 [70] and the Tapping Screws (W/Flange) D5 x 20 (Black) [71] fixing Handle (B) [69] and Handle (A) [80], then Handle (B) [69] and Handle (A) [80] can be removed from the Crank Case [46] and Housing Ass'y [65] (Fig.
  • Page 18 9-1-2. Reassembly Reassembly can be accomplished by following the disassembly procedure in reverse. However, special attention should be given to the following items. First gear and crank shaft reassembly Press-fit Oil Seal (B) [48] in the Crank Case [46] then the O-ring (S-32) [49] is fitted in the groove inside the Crank Case [46].
  • Page 19 Inside cylinder reassembly Mount O-ring (C) [27] to the Second Hammer [26], then insert the second hammer ass'y, Damper Washer [28], Damper [29] and Damper Holder [30] into the Cylinder [24]. Make sure of the direction of the Damper Washer [28] and the Damper Holder [30] (Fig. 23). Insert the Stopper Ring [31] into the Cylinder [24], then the Stopper Ring [31] is pushed to the groove inside the Cylinder [24] with a suitable pipe (Fig.
  • Page 20 Slide sleeve (A) Retaining ring for D28 Needle cover Needle holder Washer Cylinder holder Cylinder Slide sleeve (B) Needle roller Fig. 25 Needle cover Slide sleeve (A) Slide sleeve (B) Crank case ass'y Cylinder Groove Connecting rod Crank shaft Fig. 26 Fig.
  • Page 21 Lock sleeve reassembly Be careful of the slot position of the Cylinder [24] and the Cylinder Case [9] when inserting the Lock Sleeve [6] between the Cylinder [24] and the Cylinder Case [9] (Fig. 29). Cylinder Cylinder case Fig. 29 Lubrication Apply Hitachi Motor Grease No.
  • Page 22 9-1-6. Wiring of variable speed control switch Insert each cord into the terminal 1 and terminal 2 of the speed control switch as shown in Fig. 30 and tighten the screw [tightening torque: 0.6 0.2 N m (6 2 kg cm, 5.2 1.7 in-lbs.)].

  • Page 23: Standard Repair Time (Unit) Schedules

    10. STANDARD REPAIR TIME (UNIT) SCHEDULES Variable 60 min. MODEL Fixed Work Flow H 25PV Housing Ass'y Stator Ass'y Switch Gear Cover Cord Needle Bearing Cord Armor Armature Tail Cover Ball Bearing (6001DD) Ball Bearing Crank Case (608VV) Cover O-ring (S-48)
  • Page 24 Hitachi Power Tools LIST NO. E477 ELECTRIC TOOL PARTS LIST DEMOLITION HAMMER 2004 • • Model H 25PV (E1)
  • Page 25 PARTS H 25PV ITEM CODE NO. DESCRIPTION REMARKS USED 323-078 FRONT CAP 323-077 GRIP 306-340 STOPPER RING 323-076 BALL HOLDER 323-075 RETAINER SPRING 323-074 LOCK SLEEVE 323-073 RING (A) 323-093 CYLINDER CASE COVER 323-072 CYLINDER CASE 321-313 SEAL LOCK HEX. SOCKET HD. BOLT M6X22...
  • Page 26 PARTS H 25PV ITEM CODE NO. REMARKS DESCRIPTION USED 323-055 FIRST GEAR 939-299 NEEDLE BEARING (M661) 323-084 GEAR COVER 600-1DD BALL BEARING 6001DDCMPS2L 971-736 WASHER (B) 360-660C ARMATURE 110V-115V 360-660E ARMATURE 220V-230V 360-660F ARMATURE 240V 323-083 FAN GUIDE 980-864 HEX. HD. TAPPING SCREW D5X40 340-593C STATOR ASS’Y 110V-115V...

  • Page 27: Standard Accessories

    STANDARD ACCESSORIES H 25PV ITEM CODE NO. DESCRIPTION REMARKS USED 323-090 CASE OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 981-840 GREASE (A) FOR HAMMER. HAMMER DRILL (30G) 308-471 GREASE FOR HAMMER. HAMMER DRILL (70G) 980-927 GREASE FOR HAMMER. HAMMER DRILL (500G)

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