The appearance of extraneous noise, a decrease in power or a sparkling in the collector area are sure signs that your power tool needs maintenance. Metabo Often faced with the need for preventive cleaning or replacement of worn parts when the warranty period has already expired. Self-disassembly saves significant money on the services of service centers, but requires accuracy and understanding of Construction of the site.
Before starting the demolition, it is important to understand that the structure engine Professional lines often have more complex layouts than household counterparts. diagnostics At the initial stage, it will help to avoid buying unnecessary spare parts and reduce equipment downtime.
In this article, we will look at the process of disassembly in detail. Metabopaying special attention to the nuances of anchor removal and maintenance gearboxYou will learn how to correctly identify a fault and what tools will be needed for quality work.
Workplace preparation and necessary tools
You can't have a good repair without a well-organized space. You'll need a clean, well-lit desk so that small parts like screws or washers don't get lost in sawdust or dust. The lack of an organized workplace is one of the main reasons that after repair, assembly becomes a long and painful process.
The basic set of tools should include cross and flat screwdrivers of different sizes, since the fastener in the tools Metabo It is also highly recommended to prepare tweezers for the extraction of small elements and a soft brush for cleaning coal dust.
To diagnose the electrical part, you may need a multimeter to check the integrity of the windings and the resistance of the contacts. Don't forget personal protective equipment such as gloves and glasses, especially if you plan to work with compressed air or chemical cleaners.
- 🛠️ A set of precision screwdrivers for working with small mounting of the case.
- 🧹 Hard brush and a spray of compressed air to remove old lubricant.
- 📏 A bar for measuring the diameter of the shaft and bearings, if necessary, replacement.
- 🔍 A magnifying glass or magnifying glass to inspect the slats of the collector for microcracks.
⚠️ Warning: Before starting any work, be sure to remove the battery or disconnect the mains cable. Residual voltage in the capacitors or accidentally pressing the trigger can lead to injury.
Primary diagnosis and external examination
Disassembly of the screwdriver engine Metabo It doesn't start with the screws being unscrewed, it starts with a careful analysis of the symptoms, and if the instrument is buzzing but not rotating, the problem may be the spell. gearbox When the revolutions float or crack, it's most often the worn brushes or the damage to the anchor winding.
Visual inspection of the body reveals cracks or traces of plastic overheating, indicating that the engine is operating in extreme modes. Pay special attention to the ventilation holes: if they are clogged with dust, the engine could corny overheat, which led to the degradation of the insulation or lubrication.
Checking the coal brushes through special process holes (if they are provided by the design of your model) gives a quick answer to the question of their wear. If the length of the graphite block is less than 4-5 mm, its further operation will damage the collector, and then simple replacement of brushes is no longer necessary.
The smell of burning or melted plastic inside the housing is a critical signal that requires complete disassembly and defectiveness of all components, and ignoring such signs can short-circuit and fail not only the engine, but also the control electronics.
The process of disassembling the body and dismantling the engine assembly
The algorithm of actions during disassembly depends on the specific series of tools, but the overall sequence is similar for most models. MetaboFirst, you need to unscrew all the visible screws connecting the halves of the body, not forgetting to check the hidden mounts under rubber linings or stickers.
When you remove the body, you'll see an internal device where the motor is normally connected to the gearbox, and carefully disconnect the wires that go from the trigger switch to the engine, remembering or photographing the connection circuitry before you build them so you don't confuse polarity.
Removing the engine often requires removing the latch bar or releasing the latches that hold it in the stanza, and acting without undue effort to avoid damaging plastic mounts that become brittle in the cold or old age.
☑️ Checklist before disassembly
Separating the motor unit from the gearbox is a key point that requires caution. The gears can be firmly planted on the shaft, and sharp twitching can damage the teeth or the shaft itself.
- 📸 Take a photo of the connection of the wires to the engine before disconnecting.
- 🔩 Put the screws of different nodes in separate containers with signatures.
- 🧼 Wash with gasoline "Kalosha" or a special cleaner all metal parts before assembly.
Disassembly of the electric motor: anchor, stator and brushes
The immediate disassembly of itself electric-motor It starts with removing the brush holders. Metabo They can be removable or built into the engine body, if the brushes are removable, they can be removed by lifting the spring, if they are built in, you need to carefully open the rear casing.
The anchor (rotor) is usually removed after the front cover is removed and disconnected from the gearbox. Pay attention to the condition of the bearing seats: if there is a backlash, the bearings are subject to mandatory replacement. When you knock out the shaft, use soft controls to avoid damaging the thread or slats.
The stator (fixed part) is inspected for blackening of the winding or violation of the lacquer coating. Any signs of overheating of the insulation indicate that rewinding or replacing the stator is inevitable, since the risk of interturning is too great.
⚠️ Warning: When you remove the anchor, watch for the veneer or the slats joint, and losing this little element will make it impossible to transfer torque to the gearbox.
The collector is cleaned of graphite dust with soft rags dipped in alcohol or a special solvent. Do not use abrasive coarse grinding materials that can disrupt the geometry of lamellae.
How to check the anchor for interturn circuit?
A PPH (anchor checker) is required for accurate diagnosis. At home, you can use a multimeter in vertebrae mode: the resistance between the adjacent lamellae should be approximately the same. The spread of readings greater than 30% indicates a malfunction of the winding. The anchor can also be checked by connecting it to the 12-24V network through a rheostat and holding a metal plate - a strong vibration of the plate will indicate a circuit.
Maintenance of the reducer and replacement of lubricant
screwdriver gearbox Metabo It's a very stressful place, so the state of the lubricant is critical. The old lubricant loses its properties over time, thickens and stops protecting the rubbing fumes from wear, and the complete replacement of the lubricant is a mandatory maintenance step.
When you look at gears, look at the integrity of the teeth. Chipped, metal scraping, or heavy wear indicate that a damaged pair of gears must be replaced. Operating a gearbox with damaged teeth will cause the entire knot to fail quickly.
For lubrication, it is recommended to use specialized formulations for high-loaded nodes, for example, based on molybdenum disulfide. Conventional lithium lubricants may not withstand the high speeds and temperatures that occur in the gearbox of a professional tool.
| Component | Type of malfunction | Elimination method | Required spare part |
|---|---|---|---|
| Brushes | Wearing over 50%, sparkling | Couple replacement | Metabo Coal brushes |
| Bearings | Luft, hum, heat. | Replacement | 608ZZ bearing or analogue |
| Scooterney. | Chipped teeth, noise | Couple replacement | A gearbox set |
| Patron | Beating, jamming | Replacement or cleaning | Fast-clamp cartridge |
When assembling the gearbox, it's important not to overdo it with the amount of lubrication. The excess can be squeezed out through the glands and get into electrical contacts, which will cause corrosion or closure. It's optimal to fill about 60-70% of the gearbox volume.
Use a consistent EP-marked lubricant (Extreme Pressure) for high-load gearboxes, which will extend the life of the gears by many times.
Building, testing and typical errors
The assembly is done in reverse order, but there are some nuances: When you install the anchor, make sure that the bearings sit tightly in their seats, and the shaft rotates freely without jamming. The tension of the brushes must be uniform, otherwise there will be uneven wear of the collector.
The first switch on after repair is better to make cautiously, controlling the current consumption and temperature of the body. If the tool works smoothly, without extraneous sounds and the smell of burning, you can consider the repair a success.
One common mistake is the improper installation of the ossels or sealing rings, which leads to dust entering the mechanism. Another common problem is the retraction of the screws of the body, which can cause deformation of the plastic and jamming of the shafts.
⚠️ Warning: Never start the engine without a fan cap or casing installed. This can cause foreign objects to enter the rotation zone and serious injuries.
If the tool works after assembly, but warms up stronger than usual, check the correct connection of the windings and the absence of friction of the rotating parts on the stationary. Sometimes it is enough to loosen the engine screws slightly to eliminate the distortion.
Quality lubrication and proper bearing installation is 90% of the success in the long life of your Metabo screwdriver after repair.
Frequently Asked Questions (FAQ)
How often should I change my brushes on a Metabo screwdriver?
The frequency of replacement depends on the intensity of use. In professional mode, brushes may require replacement every 3-6 months. Focus on the length of carbon graphite: if it is less than 4 mm or there is a strong sparking, you need a replacement.
Can I use Litol-24 lubricant for the Metabo gearbox?
You can use Litol-24 as a temporary measure, but for long-term use it is not the best choice. Specialized lubricants for power tool gearboxes have better antifriction properties and better hold high loads.
Why does the screwdriver sparkle more after replacing the brushes?
New brushes require time to grind to the collector (usually 10-20 minutes of gentle operation). If the sparkling does not decrease after running, the collector may be contaminated or the geometry of the brush holder is disturbed.
Where can I find a diagram for my Metabo model?
Explosion diagrams (explods) can often be found on the manufacturer's official website by tool article or on specialized forums for repairing power tools. Type a model (for example, BS 18 LTX) into a search engine with the name "scheme".
What to do if the anchor winding burns?
Rewinding the anchor at home is extremely complex and requires special equipment. It is easier and more reliable to buy a new anchor assembled, matching it to the catalog number or exact dimensions (packet diameter, shaft length, gear inclination).