Repair of a concrete mixer malfunction

For any size construction project, a functional concrete mixer is a must. You’ll save time and effort because it guarantees an even and effective mixing of your concrete. But a concrete mixer can have problems too, just like any other piece of machinery, which can cause delays in your work. You can avoid expensive delays and maintain the progress of your projects by being able to recognize and fix these malfunctions.

Mechanical failures, rotational problems in the drum, and motor problems are common problems with concrete mixers. There are several reasons why these devices may malfunction, including normal wear and tear, improper use, and neglect. You can identify and treat these issues promptly if you are aware of the common symptoms.

For example, a broken drive belt or a problem with the motor could be the cause of the mixer drum’s improper rotation. Electrical components may need to be checked if the motor is having trouble operating or is not operating at all. Many of these problems can be avoided with simple, routine maintenance, but when they do arise, it’s critical to know what to do next.

We’ll walk you through the most frequent problems with concrete mixers in this post and provide you detailed, illustrated instructions on how to resolve them. Get your concrete mixer back in working order with the help of these tips, regardless of the severity of the problem. You can avoid the trouble and cost of hiring a professional repairman by arming yourself with some basic tools and basic knowledge.

Tools

Only if you have prior experience fixing concrete mixers yourself can you do the repairs yourself. Did I have to fix my own appliances? revived a vehicle or a moped? After that, you are welcome to begin fixing concrete mixers. It is best to seek professional assistance if you have never done something similar before, do not know how to hold a screwdriver in your hands, and do not have access to even a basic set of tools. If not, you run the risk of losing your concrete mixer entirely.

You will need a list of tools (the exact list will depend on the breakdown) in order to attempt an independent repair of the unit. The primary ones are pliers, a vice, a hammer, pullers (three for the haus and for bearings), and a chisel, of course. A set of keys is also necessary for everything—gas, warehouse, divorce. Assemble a barbell, tester, and knife beforehand.

Possible causes of breakdowns

Concrete mixer repairs may be necessary for a variety of reasons. It occurs:

• when the unit loads more than the established standards;
• the drum is not cleaned in a timely manner (this must be done after each use);
• the tool is stored incorrectly and in inappropriate conditions.

Belts, drive gears, and power buttons are among the consumables that require special attention.

The most frequent reasons for concrete mixer breakdowns are wear and tear on the parts, as well as incorrect storage and use. Support bearings and gear rims, however, require replacement far less frequently because they last a lot longer than the previously listed components.

Let’s examine the primary causes of major components of concrete mixer breakdowns.

1. Gears. As a rule, a quick breakdown indicates improper operation. Many owners consider periodic lubrication of rims and gears necessary, supposedly this reduces the load on the motor. And they are completely wrong! In this case, the load only increases. When working, cement/sand clings to the teeth, this increases friction and quickly wears out the metal.
2. Reducer. It wears out quickly due to poor cooling, overload. In this case, the part can only be replaced. There is even a possibility that the entire unit will have to be replaced.
3. Toothed crown. It is subject to significant mechanical loads. The material of this part is plastic or cast iron. Cast iron parts often fail (this is due to the low quality of casting). Therefore, it is better to initially install a plastic crown.
4. Off buttons. Often, the cause of the breakdown lies precisely in them. This is expressed as follows: by pressing the button, the unit (motor) supposedly starts to start, but after a couple of minutes it stops working, stopping. In this case, it is important to replace the button with another one, the main condition is that it must have the appropriate number of contacts.

Types of repair work

Button repair

Concrete mixer buttons are magnetic starters rather than merely on/off switches. This guarantees worker safety because the machine will stop if the power is abruptly cut off and won’t start up suddenly and hurt someone if it is turned on.

In the event that the button is no longer functional, carefully take off the button’s casing by loosening the screws holding it in place. Examine the component and clean the contacts if needed. Disassemble the button as well and clean the interior.

Belt repair

Sometimes it may happen that the motor works, but the tank does not (no rotation occurs). In this case, the reason may be in the belts. Remove the protective cover of the electric drive and assess the situation. Most often, the belt simply slips off – in this case, it needs to be put back in place. Sometimes, even if the belt is intact and not torn, it may be unsuitable for further use. This means that you cannot do without buying a new one. To install it, loosen the bolts that attach the motor (there are two of them), install the belt. Start with the small pulley (near the motor), gradually moving to the large one. It is advisable to use someone"s help – it is very difficult to cope on your own, because you need to pull the engine and immediately tighten the bolts. Actions occur simultaneously.

Repair of the drive gear and crowns

Try to rehabilitate the gear and crowns by giving them a good lubrication with lithol before replacing them. Invert the bowl. Using a spatula, lubricate the crowns and turn on the concrete mixer.

It’s time to replace the gear if it slides along the crown’s teeth. The gear has a diameter of 14 mm and 12 teeth, with a hole for the shaft. Take out the washer, unscrew the locking bolt (a 10-key will help), and extract the gear. Take care not to misplace the tiny key that is inside the gear. Reverse the steps and insert the key into the new gear before placing it back in its original location.

Changing the pulley and bearings

Unlike the previously described work, this one is more meticulous and will take time and skill. To access the pulley, first remove the motor box, which is situated on the concrete mixer, and the belt. The material is plastic. Consequently, it makes sense that the pulley hole will eventually round out and lose its ability to rotate the shaft.

The pulley is fastened to the rear of the box using a corkscrew ring. This indicates that you are unable to proceed without fully disassembling the framework.

There is a benefit to this as well: you will recognize the bearings’ state fully. In the event of distortions and jams, replacement of those components is also required. After that, everything just needs to be put back together and the concrete mixer should be in its original condition.

Maintaining the longevity and efficiency of a concrete mixer requires fixing any malfunctions. Long-term time and cost savings can be achieved through routine maintenance and quick resolution of any problems. Knowing typical issues and how to resolve them guarantees that the mixer will continue to function properly.

Problems with power, drum rotation, and mechanical wear and tear are common with concrete mixers. Verifying the power supply, switches, and wiring are frequently necessary when addressing power issues. Checking the motor, belts, and gears may be necessary to make sure the drum rotates correctly. Significant malfunctions can be avoided by routinely checking and replacing worn-out components.

Easy precautions can have a significant impact. The likelihood of malfunctions can be decreased by maintaining the mixer’s cleanliness, lubricating its moving parts, and storing it carefully when not in use. It’s also crucial to adhere to the manufacturer’s maintenance and repair instructions.

In conclusion, you can maintain the smooth operation of your concrete mixer by being aware of its condition and taking immediate action to fix any issues that may arise. You can make sure that your concrete mixer continues to be a dependable tool for your projects by devoting time to routine maintenance and learning how to resolve common problems.

Fixing a broken concrete mixer can help you save money and time while keeping your projects moving forward. This article will walk you through common problems such as worn-out parts, drum obstruction, and motor problems and provide easy, step-by-step solutions. You can easily restore your mixer to operational condition with the correct equipment and a little bit of know-how, preventing expensive delays and guaranteeing that your concrete is mixed effectively each and every time.

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