MODEL VB 16Y POWER TOOLS TECHNICAL DATA PORTABLE REBAR CUTTER/BENDER VB 16Y SERVICE MANUAL LIST No. 0790 Sep. 2001 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 RCB-16...
1. PRODUCT NAME Hitachi Portable Rebar Cutter/Bender, Model VB 16Y 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.
The Model VB 16Y is equipped with a slip clutch to protect the mechanism. The slip clutch functions if a rebar beyond the capacity of the Model VB 16Y is attempted to be bent or cut. When the slip clutch works, a big slip noise occurs but it is not a malfunction.
10. PRECAUTIONS IN SALES PROMOTION In the interest of promoting the safest and most efficient use of the Model VB 16Y 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 motor Do not use this electric may not start. Wait for at least one full Read handling power tools in wet second before attempting to turn the motor instructions before use.
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. 9) (a) Remove the two Tapping Screws (W/Flange) D4 x 20 (Black)  and the Tail Cover . (b) Remove the two Tapping Screws (W/Flange) D5 x 20 (Black) , four Tapping Screws (W/Flange) D4 x 20 (Black)  and two Machine Screws (W/Washers) M5 x 20 (Black)  to remove the Handle (A).(B) Set .
(3) Disassembly of the bending unit (Fig. 10) (a) Remove the Nylock Bolt (W/Flange) M5 x 16 , Washer (A)  and Center Roller (D62) Set . Remove the O-ring  from the Cam Shaft  then remove the Needle Bearing (D22) . (b) Remove the Nylock Bolt (W/Flange) M5 x 25 , Sleeve (G) , Spring (G)  and Guide (D62) .
(4) Disassembly of the gear cover (Fig. 11) (a) 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 . (b) Mark the engagement point between the Sensor Gear  and the Sensor Gear  with a magic marker.
(5) Disassembly of the gear unit (Figs. 12, 13 and 14) (a) Disassembly of the First Pinion Set  (Fig. 12) Press Sleeve (F)  press-fitted in the First Pinion Set  with a hand press to remove it. Then remove Clutch Spring (F)  from the First Gear  applying a twist to Clutch Spring (F) .
(d) Removal of the Final Gear  (Fig. 15) The Final Gear  is press-fitted in the Cam Shaft . Remove the Final Gear  from the Cam Shaft  with the J-321 final gear puller by pressing the end surface of the cam shaft with a hand press as shown in Fig.
(7) Removal of bracket (A) and (B) unit (Fig. 17) (a) Bracket (A) and (B) unit is secured to the Inner Cover Ass'y  with two Hex. Socket Hd. Bolts (W/Flange) M8 x 25 . Remove the two Hex. Socket Hd. Bolts (W/Flange) M8 x 25 . Put a core metal whose diameter is the same as the shaft diameter (40 mm) of Bracket (B)  on the end surface of Bracket (B)  and tap it with a hammer.
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 power supply unit (Figs. 19 and 20) Be sure to perform wiring connections as indicated in the wiring diagrams. (a) Be sure to put the connectors in the specified position when connecting the connector of the Cord  to the connector of the Controller Circuit  (Fig.
(2) Reassembly of the cam shaft unit (Fig. 21)   Perform reassembly so that the chamfered portion of the Cam Shaft  is aligned with the pin of the  Cam  in the same direction. * Otherwise, the Sensor Gear  cannot be  mounted in the proper position and there will be a Same...
(6) Installation of bracket (A) and (B) unit to the inner cover (Figs. 24 and 25) Mount the Cover  and Spring (F)  to the Inner Cover Ass'y  first before mounting bracket (A) and (B) unit. Securely fit one end of Spring (F)  to the Cover  then the other end into the mounting hole of the Inner Cover Ass'y .
(9) Installation of Final Gear  (Fig. 28) Mount the two Feather Keys 7 x 7 x 25  to the Cam Shaft  and gradually press-fit the Cam Shaft  into the Final Gear  supporting the end surface of the Cam Shaft . After press-fitting, be sure to secure the Final Gear  with the Retaining Ring for D28 Shaft .
12-4. Confirmation after Reassembly 12-4-1. Adjustment of turning angle of Roller (B)  After reassembly, adjust the turning angle of Roller (B)  with the J-322 angle gauge so that rebars can be accurately bent according to the setting of the set dial. (1) Adhering the angle gauge (Fig.
(3) If the line "A" on the cam cover is out of the range of the angle gauge mark, finely adjust the bending accuracy as follows (Fig. 31). (a) Unplug the power cord from the receptacle. (b) Remove the tail cover. (c) Take out the printed circuit board for adjustment and slightly turn the fine adjustment volume clockwise if the bending angle is narrow and counterclockwise if the bending angle is wide.
12-5. Tightening Torque Tighten the screws and the bolts according to the following tightening torque. Size and length Tightening torque Tapping Screw (W/Flange) D4 x 20 (Black)  0.5 N m (20 5 kgf • • Tapping Screw (W/Flange) D5 x 20 (Black)  0.5 N m (30 5 kgf...