MODEL DV 18DV POWER TOOLS D CORDLESS IMPACT DRILL DV 18DV LIST No. F854 TECHNICAL DATA AND SERVICE MANUAL Jul.
Notice for use Specifications and parts are subject to change for improvement. Refer to Hitachi Power Tool Technical News for further information.
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).
CONTENTS Page 1. PRODUCT NAME ........................................................................................................................... 1 2. MARKETING OBJECTIVE ............................................................................................................. 1 3. APPLICATIONS .............................................................................................................................. 1 4. SELLING POINTS ........................................................
1. PRODUCT NAME Hitachi 18 V Cordless Impact Drill, Model DV 18DV 2. MARKETING OBJECTIVE European competitors are now preparing to have a wide selection of cordless impact drills (combination drills), and it is expected that cordless impact drills will be the growing segment of the power tool industry. The Model DV 18DV cordless impact drill has been newly developed as a higher level version of the Model DV 14DV (14.4 V product) that is brought out together with the Model DV 18DV.
4-1. Selling Point Descriptions 4-1-1. 3-mode selection This model can be easily switched between three modes, screwdriving, drilling and impact drilling, by simply turning the cap dial. To use it as a screwdriver, set the cap to any position between 1 and 22, depending on the types of screws and the material to be fastened. The clutch is then engaged to adjust the tightening force among the corresponding twenty-two torque levels.
5. SPECIFICATIONS Capacity Screwdriver Machine screw 6 mm (1/4") Wood screw 8 mm dia. x 75 mm (#20 x 3") Brick ........................ 16 mm (5/8") [Depth 30 mm (1-1/4")] Drill Metal Mild steel 13 mm (1/2") [Thickness 1.6 mm (1/16")] Aluminum 13 mm (1/2") [Thickness 1.6 mm (1/16")] Wood 38 mm (1-1/2") [Thickness 18 mm (11/16")] Keyless chuck Mount type Screw-on (UNF 1/2" --- 20) (13VLRF-N) Diameter 1.5 --- 13 mm (1/16" --- 1/2") Rotation speed (No-load) Low: 0 --- 400/min. High: 0 --- 1,500/min.
Max. capacity 6. COMPARISONS WITH SIMILAR PRODUCTS Maker HITACHI Model Brick Mild steel Drilling Aluminum Soft wood DV 18DV 16 mm (5/8") 13 mm (1/2") P C 16 mm (5/8") 16 mm (5/8") 13 mm (1/2") Not indicated 38 mm (1-1/2") 13 mm (1/2") Not indicated 38 mm (1-1/2") 38 mm (1-1/2") 6 mm (1/4") Not indicated Not indicated 8 mm dia.
7. WORKING PERFORMANCE PER SINGLE CHARGE Drilling and fastening performance comparison per charge Working capacity (*1) Type of work D30 mm (1-1/4") 10 mm dia. (3/8") Brick Maker Model HITACHI DV 18DV *0 0 *200 50 *400 100 P Drill bit for concrete C *600 150 *800 *1000 200 250 150 3.3 150 4.4 110 5.3 95 7.1 100 8.2 T1.6 (1/16") DV 18DV HITACHI 10 mm dia. (5/16") Mild steel P HSS drill bit 85 C Drilling speed (sec./pc.) 8.
8. PRECAUTIONS IN SALES PROMOTION 8-1. Safety Instructions In the interest of promoting the safest and most efficient use of the Model DV 18DV Cordless Impact Drill 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 and Name Plate attached to each tool. A.
(7) Do not attempt to disassemble the storage battery or the charger. Special devices, such as a thermostat, are built into the storage battery and charger to permit rapid charging. Incorrect parts replacement and/or wiring will cause malfunctions which could result in fire or other hazards. Instruct the customer to bring these units to an authorized service center in the event repair or replacement is necessary.
8-2. Inherent Drawbacks of Cordless Impact Drills Requiring Particular Attention during Sales Promotion The cordless impact drill offers many advantages; it can be used in places where no power source is available, the absence of a cord allows easy use, etc. However, any cordless tool has certain inherent drawbacks. Salespersons must be thoroughly familiar with these drawbacks in order to properly advise the customer in the most efficient use of the tool. A.
(7) Precautions in the use of HSS Drill Bits Although the Model DV 18DV is designed for drilling capacities of 38 mm (1-1/2") in wood, and 13 mm (1/2") in aluminum and mild steel, this capability is not as efficient as conventional electric power tools. In particular, when drilling through aluminum material with a 13 mm (1/2") drill bit, the drill tends to become locked when the drill bit penetrates through the material.
10. REPAIR GUIDE Be sure to remove the storage batteries from the main body before servicing. Inadvertent triggering of the switch with the storage battery connected will result in a danger of accidental turning of the motor. 10-1. Precautions in Disassembly and Reassembly The [Bold] numbers in the description below correspond to the item numbers in the Parts List and exploded assembly diagram for the Model DV 18DV. 10-1-1.
(4) Disassembly of the gear unit (a) Remove the Cap [4] from the Front Case [12]. Take care not to remove the Switch Plate [8] and the Nut [9] from the Front Case [12] in this operation. (b) Turn the Motor [31] counterclockwise when viewed from the rear and remove it from the Rear Case [20]. (c) Remove the Shift Arm [22] from the Rear Case [20], and remove the Shift Knob [41] from the Shift Arm [22]. (d) Remove the Screw Set M3 x 12 (4 pcs.) [21] connecting the Front Case [12] and the Rear Case [20].
10-1-2. 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 (a) Be sure to perform wiring connections as indicated in the wiring diagram. (See Fig. 7.) Motor Spacer [30] Motor [31] Internal Wire (Red ) [37] Machine Screw (W/SP.
(2) Reassembly of the clutch unit Mount the Thrust Washer [11], Spring [10] and Nut [9] to the Front Case [12]. Screw the Nut [9] in the Front Case [12] about 1-3/8 turns (495˚). Mount the Switch Plate [8] aligning with the projections of the Front Case [12] as shown in Fig. 5. (3) Reassembly of the gear unit (a) Apply grease (Hitachi Motor Grease No. 29, Code No. 930035) to the meshing parts of the gear.
(c) Install the Click Spring [5] and the Cap [4] to the assembly reassembled in step (b). (See Fig. 11.) (i) Insert the ridge and the projections of the Click Spring [5] into the holes of the Cap [4]. (ii) When the Nut [9] is screwed in the Front Case [12] about 1-3/8 turns (495˚), the three projections of the Nut [9] and the marking of the Rear Case [20] are positioned as shown in Fig. 11. Set the narrow slit of switch flange as shown in Fig. 11.
(d) Install the Shift Arm [22] into the assembly reassembled in step (c). With the ridge at the Shift Arm [22] facing the Motor [31] side, first install them on the unmarked side of the assembly reassembled in step (c). Then insert the projections on the Shift Arm [22] into the holes in the Rear Case [20] and make sure that the projections are fitted into the grooves in the Slide Ring Gear [23] mounted within the Rear Case [20]. (See Fig. 12.) [22] Ridge [22] Hole Groove Mark Fig.
(4) Installation of the assembly reassembled in step (3) into Housing (A). (B) Set [35] (a) Install the Pushing Button [39] into Housing (B) [35]. (See Fig. 14.) (b) Install the assembly reassembled in step (3) into Housing (A) [35]. Note that the projections on the Front Case [12] and the Motor Spacer [30] are engaged in the recesses in Housing (A) [35], and the projection on Housing (A) [35] is engaged in the groove of the Cap [4]. (See Fig. 15.
(b) The tightening torque of each screw is given below. Special Screw (Left Hand) M6 x 23 [1] : 2.9 --- 3.9 N•m ( 30 --- 40 kgf•cm, 26.1 --- 34.8 in-lbs.) Drill Chuck 13VLRF-N (W/O Chuck Wrench) [2] : 12.7 --- 16.7 N•m (130 --- 170 kgf•cm, 113 --- 148 in-lbs.) Screw Set M3 x 12 (4 pcs.) [21] : 0.6 --- 1.0 N•m ( Machine Screw (W/SP. Washer) M4 x 6 [34] : 6 --- 10 kgf•cm, 5.2 --- 8.7 in-lbs.) 1.1 --- 1.9 N•m ( 11 --- 19 kgf•cm, 9.5 --- 16.5 in-lbs.) Tapping Screw (W/Flange) D3 x 16 (Black) [32] : 1.
11. STANDARD REPAIR TIME (UNIT) SCHEDULES MODEL Variable Fixed 10 20 30 Work Flow DV 18DV General Assembly Spring Drill Chuck Housing (A).
LIST NO.
PARTS ITEM NO. DV 18DV CODE NO. NO.
STANDARD ACCESSORIES ITEM NO. CODE NO. 501 DESCRIPTION DV 18DV NO. USED CHARGER (MODEL UC 24YFA) 1 502 318-236 + DRIVER BIT NO.2 55L 1 503 319-770 CASE 1 REMARKS OPTIONAL ACCESSORIES ITEM NO. CODE NO. 601 873-929 5 -- 01 DESCRIPTION WRENCH 14MM NO.
DV 18DV ITEM NO. CODE NO. DESCRIPTION NO.
