content
- 1 Properties perforator Hitachi
- 2 Disassembly Procedure perforator Hitachi
- 2.1 Disassembly keyless chuck type SDS-plus
- 2.2 Disassembly of the three-position mode switch
- 2.3 Dismantling the housing
- 2.4 Disassembly mechanical block
- 2.5 Disassembly countershaft
- 2.6 Barrel removalpercussion mechanism
- 2.7 Disassembly of the impactor components
- 2.8 What bearing types are used in the Hitachi DH24PC3 perforator and their Russian enAlignments
- 3 Dismantling of the electrical part of the perforator Hitachi
- 3.1 How to detach the rotor from the mechanical unit
- 3.2 Stator disassembly
- 3.3 Dismantling of the control circuits
- 3.4 Repair video for the perforator Hitachi
The disassembly of the Hitachi DH24PC3 is required in case you want to repair the tool with yourhands. But for this you will need not only a detailed scheme of the Hitachi perforator, but also an instruction for its disassembly, lubrication and assembly.
The Hitachi perforator dismantling does not require special expertise from the user if it strictly follows the recommendations of the proposed disassembly instruction.
Features of the percussion Hitachi
The three-mode rotary hammer Hitschi DH24PC3 is manufactured by Japanese manufacturers. The power of this perforator is 800 W.
The perforator has a smooth speed control 0. .. 1150 rpm with an adjustable stroke frequency of 0. .. 4600 rpm.
The impact strength is 3.2 J.
The weight of the punch is 2.4 Kg.
Hitachi DH24PC3 perforator is equipped with a quick-action chuck SDS-plus. Hitachi perforators are designed for drilling holes up to 24 mm in diameter in concrete in the drilling and impact mode.
In the slotting mode, the perforator helps to remove the tile, build the grooves for laying cable, tubular communications.
In the drilling mode, the punch allows drilling holes in the tree up to 32 mm, screwing screws using additional attachments.
The rotary hammer provides for the reinstallation of the front handle at any angle, which creates additional convenience in hard-to-reach places.
Procedure for disassembling the Hitachi drill
To perform the repair of the Hitachi DH24PC3 perforator, it is necessary to perform such a technological operation as disassembly of the tool.
Before disassembling, prepare the workplace, select tools, related materials, documentation.
As a workplace, a flat surface, laid with clean paper or material, is suitable. The place should be evenly lit and sufficiently illuminated.
From the tools prepare pliers, screwdrivers, pliers, screwdriver, vice.
As documentation, you will need a disassembly diagram, a lubrication circuit and the attached instructions.
Schematic diagram of Hitachi DH24PC3
The disassembly of the Hitachi DH24PC3 perforator starts with the dismounting of the quick-action chuck.
Disassembly of the quick-action chuck SDS-plus
To disassemble the punch, you need to remove the quick-action chuck:
- • Use a screwdriver to remove the protective rubber boot 1;
- • Pull the locking ring pos.2;
- • Carefully remove the cover pos. 3;
- • Press on the steel ring pos. 4 and the guide washer pos. 5, remove the locking ball pos.21;
- • Remove the steel ring, guide washer, taper spring 6;
- • It remains to get the washer pos.7 and the lock ring pos.8.
The quick-action chuck is disassembled.
Diagram of quick-action chuck SDS-plus
Dismantling of three-position mode switch
Proceed to dismantling the mode switch pos. 20A.
Set the mode switch to the "Punch" position first. Pressing the button pos.17, turn the switch anticlockwise to an angle of 15º and remove it from the engagement.
Video disassembly of the Hitachi perforator DH24PС3
At the next stage of disassembly on the Hitachi DH24PС3 perforator case, it is necessary to remove the nameplate. It is on the left side of the case, when viewed from the side of the handle.
It is removed using a screwdriver method of forging.
Removing the nameplate
Disassembling the housing
Go to the disassembly of the housing.
Install the hammer punch body vertically, pointing it to the handle. With a screwdriver or a screwdriver, unscrew the 4 screws pos. 9.To remove the cover of the mechanical unit, it is necessary to press the lever in the hole of the removed mode switch and pull the cover upwards.
In the cover of the mechanical unit there is an aluminum intermediate housing, in which the barrel of the impactor is pressed. The body of the mechanical unit consists of two parts: an internal aluminum and plastic outer.
Separating the cover of the trunk unit from the stator housing
Dismantling the mechanical unit
Several separate operations are necessary to disassemble the mechanical unit.
At the first stage, the intermediate shaft is dismantled, then the barrel of the impactor is removed and its individual components are dismantled.
Intermediate shaft disassembly
Intermediate shaft pos. 47 is inserted into the inner housing pos. 39.To remove it, pull the shaft out of the inner case.
Intermediate shaft with mode switch
Several parts are assembled on the intermediate shaft, the most important of which is a drunken bearing and a mode switch.
The principle of the perforator is simple. The torque is transmitted from the helical gear of the reduction gear( not shown) to the helical gear 1, fixed to the intermediate shaft.
rotational and reciprocating torque unit
The lateral torque is transmitted via a small spur gear of the intermediate shaft to a large spur gear mounted on the shaft of the impactor shaft. Simultaneously, with the aid of a drunken bearing pos.2, the reciprocal impulse is transmitted to the piston of the impactor. Mode switch pos.4 using the clutch pos.3 switches on or off the transmission of the shock pulse or rotary motion.
To disassemble the intermediate shaft, the helical gear, roller bearing with clutch, mode switch must be removed in sequence.
Dismantling the barrel of the impactor
The shaft of the impactor bar is pressed into the plastic cover of the mechanical unit. In order to reach the shaft of the stem pos. 24, it is necessary to remove the lock ring pos.8 outside the cover of the mechanical unit. When the snap ring is removed, it is possible to start pressing the barrel of the impactor with a press or tool.
It is not advisable to get the barrel in a shock way, so as not to damage the plastic hull of the puncher.
If there is no press, then a large metal fence will do. But they need to make a simple adaptation of a solid material, for example, wood.
Hole punching tool Hitachi DH24PC3
The new trunk for the Hitachi DH24PC3 hammer is sold assembled. Although you can buy and just a trunk, but the Chinese production.
New trunk assembly
Disassembly of the shock mechanism parts
To create a shock impulse, a piston sleeve of the perforator pos. 39 is inserted into the barrel of the impact mechanism, in which, in turn, a side fighter pos. 29 and a shock bolt fighter pos.37 are inserted.
In the rear part of the piston sleeve, a piston pin is fastened, into the hole of which the connecting rod of the rolling bearing pos. 53, known as the "drunk bearing", is fixed.
Scheme of the gun punch Hitachi
Remember! At repair all rubber accessories are replaced without fail.
What bearing types are used in the Hitachi DH24PC3 perforator and their Russian analogues
The following Japanese bearings are used in the Hitachi DH24PC3 rotary hammer:
- • Pos. 15 bearing 37 mm, article number 6904DD, dimensions 20x37x9, Russian analogue 1000904;
- • Pos.56 bearing 19 mm, article 626VVM, dimensions 6x19x6, the Russian analogue 26;
- • Item 60 bearing 22 mm, article 608DDM, dimensions 8x22x7, Russian equivalent 80018;
- • Pos.66 bearing 22 mm, article 608VVM, dimensions 8x22x7, the Russian analogue 60018;
Now you can proceed to disassemble the electrical part of the Hitachi DH24PC3.
Dismantling of the electric part of the perforator Hitachi
The disassembly of the electrical part of the perforator begins with the dismantling of carbon brushes.
In order to get the carbon electrobrushes, it is necessary to open the handle of the punch, having unscrewed the screws of the cover with a screwdriver or a screwdriver.
Extraction of carbon brushes
Using a screwdriver to release the latches, release the carbon brushes from pos. 69, 72 with pliers.
How to detach the rotor from the mechanical unit
Take the mechanical part in the right hand, and in the left stator housing, pull them in different directions, shaking. The rotor pos. 62 leaves the stator housing.
Now take the rotor in the left hand and carefully pull it out of gearing with the mechanical part of the puncher. The rotor is held in the mechanical part of the perforator due to friction in the helical gears.
Rotor perforator Hitachi DH24PC3
Stator dismantling
To remove the stator pos. 65, it is necessary to remove the plastic protection pos.63 and unscrew the screws pos.64 holding the stator in the casing. Do not forget to disconnect the stator wires from the switch.
To remove the stator from the housing, take the stator housing in the left hand, and in the right hand a wooden hammer or bar and tap on the end of the housing. With each tapping, the stator will slowly leave the housing. Read how to check the serviceability of the stator and rotor.
Dismantling the control circuits of the
To remove the switch with the speed controller, you just need to remove it from the Hitachi DH24PC3 punch handle.
In the rotary hammer, a push-button switch is used for pos. 70V to 220 V, type OLD331454 / 324536.Carbon brushes pos.74 are held in special щеткодержателях pos.75.
Hitachi DH24PC3 Rotary Hammer Control Circuit Diagram
