Security measures
- The operating conditions of the hammer must meet the requirements of GOST 12.2.010-75.
- When operating the hammer, it is not allowed:
- change the working tool if there is compressed air in the hose;
- remove the casing from the hammer;
- work without an end spring, since the spring is the limiter of the tool overhang;
- point a hammer with a lance towards yourself or others working when trying it out or working.
Instructions for use of the pneumatic jackhammer
Appointment
Hammers are designed for loosening hard and frozen soil, crushing and removing old asphalt pavements, punching openings and holes in brick walls of buildings, dismantling brickwork, breaking coal of various strengths and other similar works.
Instructions for the use of pneumatic breaker IP-4613MO and its modifications
Preparing the pneumatic hammer for work
- To prepare the pneumatic hammer for work:
- unscrew the end spring;
- remove the plug 28 from the barrel;
- wipe the shank of the working tool and insert it into the end spring, and then into the barrel;
- screw the end spring onto the barrel;
- screw the union nut onto the fitting until it stops;
- remove the plug 22 from the nipple and fill it with 30 g of kerosene, after pressing the handle;
- select a hose of the required diameter, blow it through, put it on the nipple and secure it;
- connect the air supply hose to the line;
- open the valve and start up the hammer by pressing the handle for 1-2 minutes;
- turn off the air supply from the line with a valve and disconnect the hose from the hammer by unscrewing the union nut from the fitting;
- fill the fitting with grease according to table 3;
- connect the hose to the hammer by screwing the union nut onto the fitting until it stops.
- Install a hammer with a working tool on the object to be processed and put it into work.
- When the working tool is jammed in the destroyed material, it is forbidden to apply forces to the hammer leading to the tension of the end spring. If the spring is stretched for this reason, the hammer will not be accepted for warranty repair.
Maintenance
- To ensure the normal operation of the hammer, follow the rules set out in this passport.
- The cyclic operation of the hammer provides for two types of maintenance. shift and periodic.
- Shift maintenance is carried out before starting work and includes the following activities:
- cleaning the hammer from dirt;
- setting the pressure at the hammer inlet (0.5 MPa);
- checking the preparation of compressed air supplied to the hammer.
In accordance with the proper Instructions, the air supplied to the pneumatic hammer must have a purity of at least 5 pollution class in accordance with GOST 17433-80 and contain industrial oil I-20A GOST 20799-88 about the amount of 3-4 drops per 1 m3 or other lubricant, in its properties is not inferior to the specified. The equipment recommended for air preparation and its installation diagram are given below.
Diagram of the pneumatic installation of air preparation equipment
filter drier; 2. pneumatic reducing valve; 3 (1), 3 (2). gauge pressure gauge with the upper limit of measurement /, 0 MPa (10 kgf / cm); 4. oil spray; 5. shut-off valve.
The air conditioning equipment must provide a nominal throughput of at least 2.0 m3 / min.
- Periodic maintenance includes disassembling the hammer once a month in order to clean its parts from rust and dirt. To do this, wash all parts (except for rubber parts) in gasoline or kerosene, wipe dry with a clean cloth and lubricate according to Table 3. Then collect the hammer.
- Only qualified workers should be allowed to disassemble and assemble the hammer. To avoid breakage of the pusher 16, disassemble the hammer in the following sequence: unscrew the fitting from the glass; pressing the handle, drown the pusher and, turning the handle around the axis by 30 °. 45 °, remove it from the glass.
- During long breaks in work, the hammer must be stored in a room with a temperature of 5 ° to 25 ° C and a relative humidity of no more than 70%
For the indicated conditions, pour 30-50 g of canned oil K-17 in accordance with GOST 10877-76 into the hammer through the starting device and turn it on for a short time at a minimum pressure of compressed air.
Under other storage conditions, the hammer must be preserved.
Pneumatic breakers, pneumatic hammers, pneumatic chisels
Pressure: 6.3 atm
Air consumption: 1560 l / min
Shank type: cylindrical
Impact force: 43 J
Pressure: 6.1 atm
Air consumption: 110L / min
Air Fitting Diameter: 1 / 4F in
Impact frequency: 2100 bpm
Impact force: 8.9 J
Pressure: 6.8 atm
Air consumption: 400 l / min
Air Fitting Diameter: 1 / 4F in
Impact frequency: 2000 bpm
ZIPP Industrial chipping hammer
Shank type: Hex
Impact force: 27 J
Pressure: 4.93 atm
Air consumption: 1500 l / min
Impact frequency: 1020 bpm
Shank type: cylindrical
Impact force: 55 J
Pressure: 4.93 atm
Air consumption: 1500 l / min
Impact frequency: 1350 bpm
Shank type: cylindrical
Impact force: 39 J
Pressure: 4.93 atm
Air consumption: 1500 l / min
Disassembling the Air Hammer
Impact frequency: 1152 bpm
Shank type: cylindrical
Impact force: 44 J
Pressure: 4.93 atm
Air consumption: 1.35L / min
Impact rate: 22.5 bpm
Shank type: cylindrical
Impact force: 39 J
Pressure: 4.93 atm
Air consumption: 1230 l / min
Air Fitting Diameter: 1 / 4F in
Impact rate: 20.5 bpm
Shank type: cylindrical
Impact force: 44 J
Pressure: 4.93 atm
Air consumption: 1.35L / min
Air Fitting Diameter: 1 / 4F in
Impact frequency: 17 bpm
Shank type: cylindrical
Impact force: 55 J
Pressure: 5.4 atm
Air consumption: 1560 l / min
Air Fitting Diameter: 5 / 8M Inch
Impact rate: 960 bpm
Shank type: cylindrical
Impact force: 43 J
A pneumatic jackhammer is needed if it is necessary to dismantle various concrete structures, destroy brickwork, create openings in the walls and perform other similar operations. Unlike electric or gasoline, it does not have a heavy bulky engine, therefore, it is more compact, lightweight and convenient to operate.
Principle of operation
It is necessary to connect the pneumatic jackhammer to the compressor using a special hose and turn it on. After that, the compressed air will activate the impact mechanism. the lance, which will destroy the material. Also, a chisel and a chisel can be used as equipment: depending on the design, they can make holes, nests, grooves.
Characteristics important for selection
- Impact force. pneumatic chippers for domestic use (breaking off tiles, removing old plaster during repairs, etc.) have an impact force of up to 5 J. For professional use, a pneumatic jackhammer is needed for 5. 10 J and more (up to 100 J). It will allow you to cope with chipping off stone, destruction of asphalt pavement, etc.
- The frequency of impacts per minute. the higher it is, the faster the pneumatic breakers will perform the desired operation. You should choose based on the type and amount of work to be done.
- Air consumption. this parameter should also be about 20% less than the corresponding parameter of the compressor (in this way it will be possible to reduce the number of peak loads on its engine).
- Working pressure is the pressure required for the air damper to be used. It should be 20. 30% less than the nominal pressure of the compressor: thanks to this, the pressure loss in the hoses and the receiver will not affect the functioning of the equipment.
As you know, the main task of any jackhammer is the destruction of solid materials and structures made of them. It is a percussion tool with a reciprocating snap action. At the moment, there are electric, gasoline and pneumatic breakers. About the latter. in details.
Some general information
At the very beginning, I would like to note that the pneumatic jackhammer is considered a very effective and reliable tool. But if earlier such a luxury was available only to miners who mined ores with the help of chippers, today they are widely used in construction and road works. We can talk about a wide field of application of the tool. If necessary, you can punch a niche in the wall, loosen hard rock, process asphalt, and so on. In any case, it is impossible to replace the bump stop with something better and more high-tech. Of course, if you compare the first jackhammers and those that are on sale now, then this is heaven and earth. This applies to both weight, ease of use, and technical characteristics, and even the design of the product.
About vibration damping and comforte operation
It is easy to guess that a person who has worked for about 6-8 hours on a bump stop has a very hard time. Vibrations are the cause of many diseases, so they always try to extinguish them as much as possible. For this, both special gloves and clothing are used, as well as other personal protective equipment. In the case of pneumatic equipment, you do not have to worry about the well-being of the operator. This is due to the fact that the engineers were able to design a structure that absorbs 70-75% of vibrations. Unfortunately, it is impossible to completely eliminate such an undesirable effect. When buying a tool, pay attention to the fact that the pneumatic jackhammer (MO) has a noise muffler. This is due to the fact that this technique is very cumbersome and noisy, in particular, the compressor creates inconveniences. With a silencer and earplugs, you can achieve a good result and work in more or less comfortable conditions.
A little about the power of the equipment
Second characteristic. power of the tool. If earlier units were sold that could only work at a fixed level, today it is better to buy bumpers with a power regulator. Fortunately, it will not be difficult to choose such a model. The lightest bumpers can operate at 8 Joules, and the most powerful units can operate at about 60 Joules. The lower mark will be sufficient for processing not very hard surfaces and sedimentary rocks. The upper threshold is rarely used. Also, you should know that there are electrical breakers. Such an instrument must have at least 500 and no more than 2000 watts. The situation with the lower and upper marks is similar to pneumatic equipment. From the foregoing, we can conclude that it makes sense to pay attention not only to the speed, but also to the power of the unit. At the same time, the pneumatic jackhammer device should be as simple as possible, which will make it more reliable.
Pneumatic jack hammer: MOP-2 or MOP-3?
We have already figured out a little about how this kind of equipment works, and now we will consider a few more interesting points. MOP stands for pneumatic jackhammer. It is worth drawing your attention to the fact that MOP-2 and MOP-3 differ only in technical characteristics. The 3rd generation bump stop is more powerful and perfect, since it was released later MOP-2. Nevertheless, in some situations it is impractical or simply not necessary to use it.
MOP-2 and MOP-3 operate at the same compressed air pressure of 0.3-0.5 MPa. But the impact energy in the third generation bump stop is 6 J higher and amounts to 44 Joules. At the same time, the pneumatic jackhammer MOP-3 weighs more than 400 grams, which is not at all significant. As for the appearance, the instruments practically do not differ among themselves, they have the same design and device, however, the MOS-3 is more powerful and reliable.
Speed of work performed
If you look in more detail, then you can highlight two most important technical characteristics. One of them is speed. Solid models from well-known manufacturers have the best performance characteristics. For example, a 60 J MOS can operate at 1000 beats per minute. This will be enough to carry out almost all types of work. But it is worth paying your attention to the fact that in this case the operator will be faced with the impressive weight of the equipment. On the market, you can find models with a speed of 3000 beats per minute, light weight and the same impact energy. The peculiarity of this solution is that the price will be higher, and the work performed is somewhat more complicated. In any case, it is better to give preference to something average, then the speed will be optimal and the weight is acceptable.
Pneumatic breaker: technical characteristics
It is extremely important to consider the technical characteristics when choosing a bump stop. This instrument is divided (depending on the energy of the blows) into several groups:
- Equipment with an energy of 30 joules is well suited for work in confined spaces or at heights. This is facilitated by the low weight of the unit.
- A tool with an impact energy of 40 Joules is good for general construction work.
- 50 Joules or more is fine for material that is too hard. over, it is necessary to understand that the harder it is to process the surface, the more impact energy should be.
It is worth saying a few more words about the fact that there is a large selection of attachments. A pike is installed in the standard version, but if necessary, it can be replaced with a chisel or crowbar. It is extremely important that the pneumatic jackhammer, the technical characteristics of which we have already partly considered, have a low weight. It usually ranges from 1.5 to 10 kg. Such equipment is convenient and easy to hold for a long time.
Briefly about the device
All models work the same way. Some units are equipped with additional mechanisms and functions that, although they complicate the design, make the work performed more efficient, faster and safer. In our case, the device is entirely based on compressed air. It targets the piston, causing it to move up and down. From the piston, the force is transmitted to the working nozzle, which is in contact with the work surface. Naturally, a huge number of working attachments are currently being produced. Each of them is designed to work with material of different hardness. The pneumatic damper has a damper that adjusts according to the direction of pressure. This contributes to the fact that the piston moves in one direction, then in the other. After you press the trigger, the valve will open and air from the compressor under pressure will flow to the piston.
Jackhammer
The pneumatic tool is designed to automate heavy manual labor and increase productivity in various industries. Most often, this type of equipment is used in mechanical engineering, metalworking, mining, transport, and construction. In terms of productivity, pneumatic tools are much more efficient than manual counterparts, and in terms of energy consumption. much more cost effective than power tools. Thanks to the use of compressor units, which provide the pneumatic tool with the energy of compressed air, energy consumption is significantly reduced.
The operation of the pneumatic tool is provided by piston and rotary motors. A piston engine consists of two or more cylinders, since every second stroke of the working piston in one revolution of the crankshaft is idle. Therefore, piston motors are much larger in size than rotary ones, which increases the size and weight of the pneumatic tool itself.
Domestic pneumatic tool
The FAKTORA company supplies a wide range of pneumatic tools:
Concrete breaker B-3 is a pneumatic tool designed for use in rescue operations, for the destruction of foundations, bridge supports, airfield pavements and other structures made of concrete and reinforced concrete. The B-3 is a heavy impact concrete breaker equipped for ease of use with a double handle and lances with a standard shank. The device is designed with an effective noise suppression system and vibration protection. Concrete breaker B-3 is a product of the Tomsk Electromechanical Plant (TEMZ).
The impact hammer MO-2B is considered the most popular pneumatic impact tool, which is produced at the Tomsk Electromechanical Plant (TEMZ). The MO-2B jackhammer is able to work in any spatial position, which makes it possible to use it by builders and miners. The hammer is designed for work on asphalt, brick, lightweight concrete. The device uses built-in vibration protection and noise suppression system.
The jack hammer MO-3B is a pneumatic impact tool used for rescue and construction and repair work on an asphalt surface and medium-strength concrete, as well as when it is necessary to destroy the load-bearing structures of buildings. The hammer can be used to work effectively in any position. The manufacturer of these products (Tomsk Electromechanical Plant) took care of reducing the noise level and eliminating vibration when using pneumatic tools, putting built-in vibration protection and a noise suppression system into the jackhammer.
The jackhammer MO-4B is a pneumatic impact tool designed for the destruction of high-strength concrete structures. This tool is the heaviest jackhammer among the products of the Tomsk Electromechanical Plant (TEMZ). The hammer is equipped with a double handle. Built-in vibration protection and noise suppressor, as well as the ability to use in any desired spatial position, make the MO-4B jackhammer a convenient and effective working tool.
Jackhammer and Concrete Breaker Attachment.
Jackhammer and Concrete Breaker Attachment.
Jackhammer and Concrete Breaker Attachment.
Pneumatic hose d 16 mm
Pneumatic hose d 18 mm
Designed for foundry.
Pneumatic tool
Energy efficiency assessment of analogues
Prompt service
Exclusive Dealer Terms and Prices
Delivery throughout Russia
Benefits of pneumatic tools
The main advantages of pneumatic tools are their reliability, safety of use, the possibility of long-term operation, resistance to overloads, the ability to work in a wide temperature range, in conditions of high humidity, dustiness, dangerous concentration of explosive gases. Thus, this type of tool is one of the most practical, reliable and effective.
Groups
Depending on the type of work performed, the pneumatic tool can be divided into several groups.
- The main and most popular type are percussion instruments:
- jackhammers and picks,
- breakers,
- punchers.
This type of tool is most often used in construction, road repair and rescue operations. It is designed for impact destruction of asphalt, brick, stone and concrete of various strengths.
Air tool manufacturers are carefully working on the designs of their products so that they are comfortable and easy to use. Most of the tools are adapted for use in any possible spatial position, have comfortable handles and controls. Powerful concrete breakers, jackhammers, rock drills and other equipment are equipped with a noise damping and vibration damping system, which is very important not only for the health of workers in constant contact with this equipment, but also for people nearby.
Disassembly and assembly of the jackhammer
The article provides instructions for disassembling and assembling a MO type jackhammer. Particular attention is paid to the key points, during the implementation of which errors most often occur. This article will be useful not only directly for working with MO type jackhammers, but also with other domestic-made hammers made “based on”.
Domestic jackhammers require careful attention and adherence to basic operating standards. With proper use, hammers can last a long time and perform their functions efficiently. The main requirement for the operation of domestic jackhammers is their obligatory de-preservation and lubrication before putting into operation. For this, it is necessary to disassemble and assemble the hammer. In addition, disassembly and assembly of the hammer is carried out for troubleshooting, preventive inspection and conservation.
In this article, we will sequentially, step by step, look at the process of disassembling and assembling a jackhammer. At the beginning, we give a general drawing of a mo-type jackhammer, in order to make it easier to navigate.
Dismantling the jackhammer is carried out in the following sequence:
Unscrew the end spring 20 and remove the lance.
Fasten the hammer in a vise, remove the ring 7 with a screwdriver and remove the muffler. Using a special pliers, remove the retaining ring 13.
NOTE: at a construction site, in “field” conditions “special” ticks may not be at hand. Usually they get out of the situation as follows: they take two pieces of reinforcement, put them to the open ends of the ring (that is, they put them in the space of the retaining ring) and, with the help of careful hammer blows, they open and remove the ring.
Remove the retainer prom. link 26 and unscrew the intermediate link 4 itself together with the handle 1.
Remove the air distributor (valve mechanism) with Belleville spring 6 from the barrel and disassemble it.
NOTE: be careful! See how the valve train is assembled, how it is installed on the barrel, where which pins are located. Remember their positions so that nothing is confused when assembling the hammer. One of the major assembly errors is that the assembler does not properly assemble the valve manifold. For example, it installs the pins not in special mounting holes, but in the air distribution ducts! As a result, the jackhammer does not work.
Remove the drummer 17 from the barrel.
Unscrew the foot 24 from the intermediate link, remove the washer 25 from it.
Remove the handle, remove the spring 2.
The demolition hammer is assembled in the reverse order. During the assembly process, pay special attention to the following:
NOTE: one of the most common “breakdowns” the jackhammer is that the de-preservation was not carried out and the striker simply stuck in the barrel. In a serviceable and reactivated hammer, the striker must move freely in the barrel.
NOTE: When disassembling / assembling the hammer, the valve train must also be disassembled prior to commissioning. The Belleville washer often sticks to the sides of the box and does not work properly.
An indicator of correct assembly of the hammer is a clear start and rhythmic, without interruption, the frequency of strikes of the striker on the shank of the lance at a compressed air pressure from 300 kPa to 500 kPa in any position of the hammer (up, down, horizontal).
In conclusion, I would like to add: there is nothing difficult in assembling and disassembling a jackhammer. From a person, only attention is required, strict adherence to instructions and a responsible attitude to business. If you do everything deliberately, then the probability of error is practically excluded.
Due to the above reasons, the following breakdowns may occur in jackhammers:
It should be remembered that it is unrealistic to make a high-quality repair of jackhammers on your own, without special knowledge and technical means. This can further damage the instrument. Please contact us. Many years of experience of our employees, modern equipment for repair and production of spare parts, an individual approach and consulting assistance will help you keep the tool in working order. We guarantee that after the repair, the energy and vibration parameters of the jackhammers will be no worse than those of the new ones.
Order a jackhammer repair
You have already understood that you cannot make repairs yourself?
Come to us. We have not only our own repair and service base for the repair and maintenance of jackhammers, but also our own production of spare parts for pneumatic jackhammers. We do not purchase parts for repair, but do them ourselves, which naturally affects your savings.
Typical breakdowns of jackhammers
The experience of our company’s specialists shows that among the main reasons due to which breakdowns of jackhammers occur, the following can be distinguished:
-The work of a jackhammer at a compressed air pressure of more than 5 atm.
-The use of a low-quality working tool (peak, blades, chisels) with a shank loose in diameter.
-Operation without rubber bushing and with extended end spring.
-Ingress of dirt, dust and abrasive into the hammer body.
-Lack of lubrication and regular maintenance of the hammer.
Repair of pneumatic jackhammers
Workshop phone 063 247-94-21
Jackhammers are an extremely professional and rather expensive pneumatic tool, which is economically inexpedient to purchase after each breakdown. That is why, today, for many enterprises, the repair of jackhammers is so relevant. The mechanical part of the jackhammer often breaks down due to the enormous loads that fall on this tool.
We offer you the repair of pneumatic jackhammers, both modern and models of the Soviet period. We will repair your tool quickly, efficiently and at an affordable price.
Why pay more when you can get high-quality and inexpensive repairs at an affordable price?
We are one of the few who do not just make repairs, but also restore the inner surface of the barrel (perform grinding), as well as replace the axle box and jackhammer jumper. We install exclusively original valve blocks, hammers and industrial links on hammers. The lifespan of our spare parts is much longer than the lifespan of our original parts. Continuous improvement of the scientific and industrial base allows us to identify the main problems of hammers, and accordingly develop and implement the most modern and high-tech units and parts.
REPAIR OF PNEUMATIC HAMMERS AND CONCRETE BREAKERS
A pneumatic jackhammer is a tool used for loosening hard earth rocks, breaking coal of various strengths, using a pneumatic hammer to extract soft ores, clay, shale, it is also used in road construction, for example, to dismantle asphalt pavements. On various construction sites, pneumatic breakers can be used to punch openings and holes in brick walls of buildings, loosen frozen soil, break ice and other work.
With constant use of a pneumatic breaker hammer, some of its components and parts wear out over time and become unusable, therefore, in order for the hammer to serve you for a long time, you need to periodically check for worn parts and repair broken components.
Our company carries out repair and maintenance of pneumatic breakers, concrete breakers. Having handed over to our workshop a concrete breaker or a jackhammer for repair, you receive a full range of services, which includes the following:
- Complete hammer (concrete breaker) diagnostics
- Identifying broken parts and parts
- Replacing broken parts
- Recommendations for replacing parts that are still working, but which will soon become unusable (we change these parts, at the request of the client)
- We draw up acts for repairs
- We make complete specifications with the indication of spare parts
- We give 1 month warranty for the tool
Explosion diagram of a jackhammer MOS
To hand over a pneumatic jackhammer for repair or hand over a concrete breaker for repair, please contact us at the address: St. Petersburg, Vartemyagi settlement, Proizvodstvenny massif, 12
Repair of pneumatic jackhammers MO, MOP, MOP-M and concrete breakers
SPARE PARTS FOR HAMMERS AND CONCRETE BREAKERS
We always have spare parts for jackhammers, because one of the main areas of activity of our company is the repair of pneumatic tools. We know how and we know exactly how to repair pneumatic tools. A professional repair team and a complete workshop with all the necessary equipment for repairs, allow you to repair pneumatic tools with high quality and in the shortest possible time.
For uninterrupted and long-term operation with a pneumatic chisel hammer in winter, we recommend purchasing a main water separator VM-3. which prevents condensation from entering the breaker through the air line.
Repair of pneumatic jackhammer
- Vendor code :
- Unit: pcs.
type MO-2, MO-3, MO-4, MOP-2, MOP-3, MOP-4, MO-2B, MO-3B, MO-4B, MO-2A, MO-3A, MO-4A.
Jackhammers are an extremely professional and rather expensive pneumatic tool, which is economically inexpedient to purchase after each breakdown. That is why, today, for many enterprises, the repair of jackhammers is so relevant. The mechanical part of the jackhammer often breaks down due to the enormous loads that fall on this tool.
We offer you the repair of pneumatic jackhammers, both modern and models of the Soviet period. We will repair your tool quickly, efficiently and at an affordable price.
Typical breakdowns of pneumatic jackhammers
The experience of our company’s specialists shows that among the main reasons due to which breakdowns of jackhammers occur, the following can be distinguished:
-The work of a jackhammer at a compressed air pressure of more than 5 atm.
-The use of a low-quality working tool (peak, blades, chisels) with a shank loose in diameter.
-Operation without rubber bushing and with extended end spring.
-Ingress of dirt, dust and abrasive into the hammer body.
-Lack of lubrication and regular maintenance of the breaker.
Due to the above reasons, the following breakdowns may occur in jackhammers:
It should be remembered that it is unrealistic to make a high-quality repair of jackhammers on your own, without special knowledge and technical means. This can further damage the instrument. Please contact us. Many years of experience of our employees, modern equipment for repair and manufacture of spare parts, an individual approach and advice will help you keep the tool in working order.
Come to us. We have not only our own repair and service base for the repair and maintenance of pneumatic breakers, but also our own production of spare parts for pneumatic breakers. We do not purchase parts for repair, but do them ourselves, which naturally affects your savings.
Order repair of a pneumatic jackhammer
HAMMER COMPOSITION
The list of main parts and assembly units that make up the hammer is given in table 1.
DEVICE AND OPERATION OF THE HAMMER
7.1. The hammer (Figure 1) is a pneumatic valve-acting pneumatic piston hammer operated by compressed air. The hammer consists of an air distribution-impact mechanism, a handle with a starting device assembled in it and a silencer casing.
7.2. The air distribution percussion mechanism consists of a barrel 2 with an axle box pressed into the barrel, a bridge, a striker 13, a valve box 5, a valve 10, a pin 8, a seat 6 and a cover 7.
The air distribution and impact mechanism carries out:
a) inlet of compressed air into the barrel cylinder alternately into the chambers of the forward and reverse stroke of the striker and the release of exhaust air into the atmosphere;
b) converts the energy of compressed air into the mechanical work of a moving striker.
7.3. The starting device consists of a handle 3, an intermediate link 1, a plug, a valve, a spring 11, a nipple 17, a union nut 18.
7.4. To prevent self-loosening of the threaded connection of the barrel and the link when aligning the barrel hole with the slots of the intermediate link, a retainer 19 is installed.
7.5. Valve cover 7 serves to press the air distribution unit to the end of the barrel.
7.6. The connection of the hose supplying air to the hammer is carried out using the nipple 17 and the union nut 18.
7.7. To keep the lance from falling out, an end spring 16 is screwed onto the hammer barrel, while a rubber bushing 20 is installed on the tool between the barrel and the end spring.
Depending on the working conditions, a pike, a shovel, a hatchet or other tool with the required design of the working end can be used in the hammer. Shank dimensions are shown in Figure 2.
7.8. The hammer is started by pressing the handle. The pressing force when switching on must overcome the resistance of the spring and the valve, supported by compressed air. To start the hammer, a force of 68.6-97.6 N must be applied, depending on the air pressure. The hammer switches off automatically when the force is removed from the handle.
The handle of the hammer is made of cast aluminum, the thermal conductivity of which is 0.4 W / (m-K) and has a surface roughness of 0.8 mm.
7.9. The hammer works as follows: when you press the handle, the valve moves down and opens the hole communicating with the annular chamber of the valve distribution. With the help of the valve distribution, the striker and the barrel, compressed air is alternately supplied to the chambers, the forward and reverse strokes of the striker, thereby forcing it to reciprocate. Thus, the workflow of a hammer is not fundamentally different from the workflow of any valve-controlled hammer.
PREPARATION AND PROCEDURE OF WORK
8.1. Hammers received from the factory or warehouse should be disassembled after long-term storage, the parts must be cleaned of grease and thoroughly washed in kerosene and reassembled.
8.2. Check the freedom of movement of the striker in the barrel by inverting the hammer in a vertical plane.
8.3. Make sure the intermediate link is screwed tight and secured with a stopper.
REMEMBER that when this connection is loosened and gaps appear in the air distribution device, the parameters of the hammer deteriorate sharply.
8.4. Ensure free movement of the handle.
8.5. Before starting work, attach a hammer hose to the filter and grease nozzle in the compressed air network. If no lubrication nozzle is available, inject grease through the nipple. During the operation of the hammer, periodically fill the hammer with grease to ensure constant lubrication of the rubbing parts. Lubricate a new hammer 3-4 times per shift during the first two weeks of operation. A worn-in hammer should be lubricated at least twice a shift.
8.6. Clean the lance shank from dirt, put a rubber sleeve on the lance, insert the lance into the hammer and secure with the end spring, screwing it onto the barrel until it stops so that the lock falls into the corresponding groove in the barrel.
8.7. Blow out the hose with compressed air and, making sure there is no dirt, attach it to the hammer nipple. Make sure that the hose is securely fastened and that the operating air pressure is at least 0.4. 0.55 MPa.
8.8. Press down on the hammer while the lance is working.
8.9. Store the hammer away from dust, water, etc. during breaks.
11. STORAGE RULES. TRANSPORTATION
11.1. During long-term storage, hammers should be preserved, and for short-term storage. external preservation can be removed.
11.2. Hammers can be transported by any means of transport.
11.3. Hammers should be stored in dry, closed areas.
TECHNICAL DATA
Technical data of pneumatic jack hammers MOP-2, MOP-3, MOP-4 are given in table 2.
| Working pressure of compressed air, MPa, not less | 0.3 ÷ 0.5 | ||
| Single impact energy, J, not less | 39 | 44 | 55 |
| Impact frequency, sec. 1. not less | 22.5 | 20.5 | 17 |
| Specific consumption of free air, m? / MinkW, no more | 1.35 | ||
| Power, W, not less | 875 | 905 | 945 |
| Hammer weight without tool, kg, no more | 7.4 | 7.8 | 8.5 |
| Mass of the hammer perceived by the operator’s hands, N | 68.6. 97.6 | ||
| Hammer length (without replacement tool), mm | 510 | 545 | 580 |
| Sleeve inner diameter, mm | 16 | ||
| Pressing force, N | 68.6. 97.6 | ||
| Pressing force of the starting device, N | 8 | ||
| Handle diameter, mm | 28 | ||
| Tool shank size, mm diameter length |
24 70 |
||
Vibration characteristics of hammers meet the requirements of GOST 17770-86 “Hand-held machines. Requirements for vibration characteristics “and GOST 16519-78” Hand-held machines. Methods for measuring vibration parameters “with a coefficient of in-shift use of 1.0 and are given in Table 3.
Noise characteristics meet the requirements of GOST R 51402-99 (ISO 3746-95) “Noise of machines. Determination of sound power levels of noise sources by sound pressure “and GOST 12.2.030-83” Hand-held machines. Noise characteristics “and are given in tables 4 and 5.
13. REPAIR
13.1. At all enterprises where hammers are used, a clear record of the operating time of each hammer must be organized in special journals before it is written off.
13.2. Repair is carried out by replacing failed parts with new ones and restoring worn out.
13.3. After disassembly, the hammer parts are washed in kerosene, diesel fuel or cleaned in other ways with careful removal of the pin from the working surfaces of the barrel, axle box, striker, air distribution parts, starting device, retaining ring.
13.4. Before the hammer is repaired, parts and assemblies are inspected.
13.4.1. External examination reveals the presence of cracks, nicks, chips, scuffs, coating of air distribution channels.
13.4.2. The dimensions of the rubbing parts (drummer, barrel, axle box) are measured with measuring tools, micrometer and bore gauges.
13.4.3. Fault detection and establishment of the possibility of repair of parts is carried out by the relevant services of the hammer consumer.
13.5. The hammer is assembled in the order and in compliance with the requirements established by section 9 of this operating manual.
13.6. Before checking the functionality of the hammer, is 25 cm poured through the nipple? industrial oil I-12A GOST 20799-75. The hammer is run-in on pinched peaks at a pressure of 0.3-0.5 MPa for 0.5 min (at least) for normal and 0.5 min (at least) for a peak with a shortened shank (50 mm).
13.7. After testing, each hammer must be completed with a passport in the form established by the repair company, indicating the size of the hammer, year and month of release of the hammer from repair.
The warranty period for the repaired hammer is set on the basis of a coefficient of 0.7 of the warranty. The warranty period for the new hammer. 6 months from the date of commissioning with an operating time of 300 hours.
POSSIBLE MALFUNCTIONS AND METHODS OF THEIR ELIMINATION
10.1. Possible malfunctions and methods of their elimination are shown in table 6.
10.2. In all cases of failures requiring disassembly of the hammer, it is necessary to take it to a workshop for flushing or repair.
The key to comfortable work is the correct preparation of a new tool
Before starting operation, a new jackhammer or concrete breaker must be prepared for operation and make sure that there is no scrap:
- It is necessary to disassemble the tool, clean it of factory grease, since it does not serve to lubricate moving parts, but to protect the metal from corrosion.
- It is necessary to check the details for defects, most often these are poorly welded industrial links and valve boxes.
- Disassembly is also necessary to check that there are no foreign objects in the bore (often metal shavings remain).
- In some cases, valve box magnetization may be present, preventing the valve from triggering and turning on the hammer.
- There is also a misalignment of the axle box of the barrel and the striker, which leads to jamming of the striker at the bottom of the barrel.
- It is necessary to check the movement of the striker in the barrel by turning the hammer.
- Before installing the lance, wipe the shank from dirt. Particles of sand and dirt on the shank significantly reduce the tool life, acting as an abrasive.
- Lance shank must be lubricated before starting work.
- Use manufacturer’s recommended lubricants.
Pneumatic Breaker and Concrete Breaker Operation
The reason for the release of a significant part of the tool is not its poor quality, but improper operation. Even an industrial grade tool designed to withstand huge loads and continuous operation during the working day can be easily “killed” by inept handling.
First of all, the tool must correspond to the tasks that you face. There is no one-size-fits-all equipment that does all dismantling tasks equally well. To carry out work on weight, only jackhammers of class 1 and 2 will be convenient, and for breaking strong reinforced concrete, breakers should be used, and not jackhammers, which are often bought for such tasks.
Problems encountered during work
Freezing. A common problem when operating in the autumn-winter period, when the temperature approaches zero. The moisture contained in the compressed air, with a sharp decrease in exhaust pressure, turns into ice, which clogs the passageways, causing the tool to stop working.
Note! Do not warm up the jackhammer over the fire, using a blowtorch or burner, uneven heating of the elements leads to thermal stresses, which may cause cracks in the barrel or its geometry will be disrupted.
Some owners equip a special compartment to warm up frozen hammers next to the exhaust pipe of the compressor station. Lubrication of parts with diesel fuel also helps to cope with such a problem, it loosens the ice, due to which it is carried out by the air stream.
The best way to deal with this problem is the preliminary preparation of compressed air entering the pneumatic line. Use moisture separators and lubricators, they will greatly facilitate your work and save the resource of the tool.
- Moisture separators (separators) effectively cope with the removal of excess water from the air, ensuring the removal of up to 95% of excess moisture.
- Lubricators introduce an oil emulsion into the compressed air, it provides lubrication of the working units of the tool, so that you do not have to be distracted by applying the lubricant.
In the event that a lubricator is not intended to be used, grease is poured through the nipple. It is recommended to lubricate new hammers 3-4 times per shift during the first two weeks, after which the number of lubrications can be reduced to 2.
High blood pressure. Many of the owners, trying to increase the productivity of a jackhammer or concrete breaker, increase the compressed air pressure to values of 7-8 atmospheres. With such an increase in pressure, the load on the elements increases by 40-60%, which leads to a catastrophically rapid drop in the resource.
Remember, the working pressure for most domestic models must correspond to 0.5 MPa (5 atmospheres), imported jackhammers are mainly designed for higher values
6.3 atm., Before starting work, always carefully read the manufacturer’s recommendations.
Many workers believe that the situation with an increase in working pressure is “saved” by the long length of the pneumatic line. This is not at all the case, the pressure drop in a pneumatic hose 50 meters long and 16-18 mm in diameter is only 0.3-0.4 atmospheres. In order to avoid premature failure of the tool, the correct working pressure should be set, with the length of the sleeves up to 50 meters, set the pressure recommended by the manufacturer. If the length of the route is 50-100 meters, it is necessary to increase the pressure by 0.5 atmospheres.
Most of the hammers and concrete breakers produced in the CIS are very easy to disassemble, and failed units can be easily replaced, which significantly reduces the cost of operating such equipment.