MODEL VB 13Y POWER TOOLS TECHNICAL DATA PORTABLE REBAR CUTTER/BENDER VB 13Y SERVICE MANUAL LIST No. 0782 Jan. 2000 SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT...
REMARK: Throughout this TECHNICAL 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: Competitors Symbols Utilized Model Name Company Name CB-13 DR-12E ALBA...
1. PRODUCT NAME Hitachi Portable Rebar Cutter/Bender, Model VB 13Y 2. MARKETING OBJECTIVE A compact and lightweight power tool that reduces worker fatigue and enhances work efficiency. 3. APPLICATIONS Cutting and bending of rebars (concrete reinforcing rod) during construction of foundations and external structures.
(5/8")), the Model VB 13Y is half the price of the electro-hydraulic cutter/bender and the cost/performance ratio is excellent. This is because the Model VB 13Y is equipped with a gear and a cam instead of a hydraulic system for cutting rebars, and an advanced microprocessor instead of an electromagnetic clutch for bending rebars.
5-1-10. Low height The Model VB 13Y has a unique design, with the bending unit being lower than the motor unit, to give the bender added stability when bending long rebars. Although the maximum capacity rebar diameter is smaller than another maker's electric cutter/bender, the Model VB 13Y is convenient to use thanks to its lower height (135 mm (5-5/ 16")) while the other maker's electric cutter/bender is 245 mm (9-41/64") high.
Weight 12.0 11.5 12.3 (excluding cord) (26.5 Ibs.) (25.4 Ibs.) (27.1 Ibs.) 7-1. Working Efficiency Comparison Maker HITACHI Model name VB 13Y Capacity Rebar Dia. (1/2") (1/2") (1/2") Motorized gear Manual Manual Drive System drive system Cutting Time seconds/operation Bending Time (180˚) seconds/operation * The data shown in the above table are mean values of 50 bending operations.
8. HOW TO USE THIS UNIT (1) Cutting work (Fig. 7) Rebar Cutter Variable-speed switch Fig. 7 Alignment marks Setting dial (2) Bending work (Fig. 8) Rebar To switch between cutting and bending To adjust bending angle (0 ﬂ --- 180 ﬂ) Fig.
10. PRECAUTIONS IN SALES PROMOTION In the interest of promoting the safest and most efficient use of the Model VB 13Y Portable Rebar Cutter/Bender 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.
11-1. Pictograph Illustration and Explanation If the switch is turned off and then immediately turned on again, the Do not use or leave this electric motor may not start. Wait for at power tool in wet weather least one full second before conditions.
12. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY The [Bold] numbers in the descriptions below correspond to the item numbers in the Parts List and exploded assembly diagram. 12-1. Disassembly (1) Disassembly of the handle (Fig. 10) Remove the two Tapping Screws (W/Flange) D4 x 20  and the Tail Cover . Remove the two Tapping Screws (W/Flange) D5 x 20 , four Tapping Screws D4 x 20 (W/Flange)  and two Machine Screws (W/Washers) M5 x 20  to remove the Handle (A).(B) Set .
(3) Disassembly of the power supply unit 1) Removal of the Controller Circuit  (Fig. 10) Remove the rubber bushing and pull out the cable of the Controller Circuit  from the Gear Cover Ass'y . Disconnect the cable connector from the cable and separate the Controller Circuit  from the Gear Cover Ass'y .
(5) Disassembly of the gear (Figs. 13, 14 and 15) 1) Remove the two Hex. Socket Hd. Bolts (W/Flange) M4 x 10  from the bottom of the Gear Cover Ass'y  and remove the Sensor Cover  and the O-Ring (S-85) . 2) Mark the engagement point between the Sensor Gear  and the Sensor Gear  with a magic marker as shown in Fig.
  Third Pinion First Pinion (B)  Second Pinion Fig. 15 (6) Disassembly of the gear unit (Figs. 16, 17 and 18) 1) Press First Pinion (B)  in A direction with a hand press supporting the surfaces B and C respectively. Then remove Sleeve (B) , First Gear (B) , Clutch Spring , Collar (A)  and Washer  (Fig.
   Hook             Fig. 19 Fig. 20 (8) Disassembly of bracket (A) and (B) unit (Fig. 20) Press the Bolt (A)  with a hand press supporting Bracket (A) . Then the Feather Key , Bracket (A)  and Bracket (B)  can be removed.
12-2. Reassembly Reassembly can generally be carried out as the reverse of the disassembly procedure, with some items to be noted as follows. (1) Reassembly of the cam shaft unit (Fig. 22)  Perform reassembly so that the chamfered portion of the Cam Shaft  is aligned with the pins of the Cam  in the same direction.
(5) Reassembly of bending unit (Figs. 12 and 22) Mount the Cam Cover , Turn Table  and Center Plate (A)  in the reverse of the disassembly procedure. Before mounting the Center Plate (A) , apply grease (TUFREX 251) to the 18 mm dia. hole of Center Plate (A)  adequately.
For products with noise suppressor CR Unit (0.022 µF + 5 KΩ) Switch Stator Choke Coil 8 µH Cord Printed Circuit Armature Board Ass'y Choke Coil 5 µH CR Unit Stator (0.022 µF + 5 KΩ) Capacitor Control Circuit Ass'y (0.22 µF + 2 x 3300 pF) Fig.
<Starting position for backward rotation> Marked line for 13 mm dia. bar Marking on the angle gauge  Check the starting position for backward rotation. Fig. 29 Fig. 28 (2) Adjust the bending accuracy as follows (Fig. 30). 1) Unplug the power cord from the receptacle. 2) Slightly turn the fine-adjustment control on the Controller Circuit  with a screwdriver.
12-5. Repair Procedure Following table shows rough repair procedures. Refer to the above mentioned disassembly and reassembly procedures for details. * Be sure to confirm the operation of the controller circuit, gears, brackets and cam after reassembly of them, and perform adjustment if necessary.