How to repair a concrete mixer with your own hands: change the bearing, remove the bulb, eliminate other malfunctions

While doing a concrete mixer repair on your own may seem difficult, it is completely doable with the right help and perseverance. This guide will help you solve common problems like a broken bulb, a malfunctioning bearing, or other common problems step-by-step. Fixing it yourself will give you a sense of accomplishment and save money.

A defective bearing is one of the most common issues with concrete mixers. The mixer becomes noisier and less effective when the bearings wear out, which aids in the drum’s smooth rotation. If you take the proper procedures, changing the bearing isn’t too difficult. We’ll demonstrate how to locate the problem, collect the required equipment, and successfully replace the bearing.

Taking care of the mixer’s bulb is another frequent problem. It is essential to remove and replace a broken lightbulb in order to guarantee safe operation and adequate visibility. We’ll go over the proper way to take out the old lightbulb and replace it without endangering the mixer.

Concrete mixers can experience various malfunctions apart from bearings and bulbs. Every problem has a unique set of solutions, from alignment issues with drums to motor problems. We’ll go over a few common issues and offer helpful advice on how to identify and resolve them.

You can keep your concrete mixer in good operating order and save money on repairs by according to this guide. Regardless of your level of experience with DIY projects or inexperience with equipment repair, the instructions are easy to understand and follow. Together, we can restore your concrete mixer to its former glory.

Step Description
Change the Bearing 1. Turn off and unplug the mixer. 2. Remove the drum and the old bearing. 3. Install the new bearing and reassemble the mixer.
Remove the Bulb 1. Turn off the power supply. 2. Open the bulb cover. 3. Unscrew and remove the old bulb, then replace it with a new one.
Eliminate Other Malfunctions 1. Check for loose bolts or nuts and tighten them. 2. Inspect the power cord for damage and replace if needed. 3. Clean out any debris or buildup from the mixer.

Signs of malfunction

Determining the existence of malfunctions is simple: a broken device will not function as intended.

By paying attention to the start-up, you can perform diagnostics and determine which part is broken. It is advised to consult specialists in cases where diagnostics are complex. There are seldom any breakdowns. The most common causes of these are wear on the parts, improper use of the equipment, and breaking the operating guidelines, such as improper storage or excessive loading while the machine is in use.

The belt will continuously fly off if there is damage to the belt drive. There will be a recognizable hum from the motor as it operates. But you won’t be able to get the drum to start. The rotation speed will drastically slow down and become insufficient for the device to operate correctly if there are bearing faults.

Startup will be excessively sluggish, and when turned on, an unusual hum will sound rather than a buzz. The electric motor will hum after starting but won’t rotate if the capacitor is damaged.

Gears can also break: in this case, jerks are observed when the mixer bulb rotates, a specific crunch is heard. If the power button does not work correctly, the drum will immediately stop moving as soon as the person stops pressing the start button.

What is needed to troubleshoot?

Depending on where the breakdown occurs, different tools will need to be used to repair the failed element. Usually, you’ll need to purchase a new spare part that is exact replica of the damaged one.

A caliper, a set of screwdrivers, an adjustable and gas wrench, pliers, a bearing puller, a sledgehammer or large hammer, tweezers, a tester, a vice, and a knife are among the tools you might require. Although they are rarely used, other devices are occasionally necessary.

How to disassemble a concrete mixer?

Concrete mixers must be nearly entirely disassembled in order to be repaired. To begin, flip the pear over and take out the bolt that holds the crossbar and shaft together. To minimize the risk of damaging the thread, remove the bolt without the washer if the parts are securely fastened.

You should be able to remove the shaft by using a tool that runs along the diameter. After that, you can take the bulb out of the crossbar by unscrewing the bolts that hold the supports together. Installing the shaft on any support is necessary after removing the one with the bearings. The part is extracted from the bearing with soft claps.

How to remove a bulb from a concrete mixer?

You will need to use a three-legged puller and an open-end wrench with gas to complete the operation. This lock nut needs to be undone with a gas wrench. The bulb mounting nut is then unscrewed as well. Next, take an open-end wrench and use it to remove the side lock bolt.

Installing a three-legged puller and squeezing out the shaft will be necessary if the bulb still does not fall out after this. Here, the lightbulb ought to pop out. It is important to carefully execute the operation to prevent losing the adjusting washers.

Get expert advice on how to fix your concrete mixer! We’ll walk you through common problems like replacing bearings, clearing build-up, and troubleshooting other issues step-by-step in this guide. Regardless of your level of experience, these simple instructions will help you maintain the smooth operation of your concrete mixer without having to hire a professional or pay for expensive repairs.

DIY repair

Without prior experience, it is possible to perform do-it-yourself concrete mixer repairs; most of the time, even novices have no trouble. Throughout the procedure, it’s crucial to follow safety protocols and choose replacement parts wisely. These can be acquired from specialized construction supply stores.

You can contact experts who will fix the device if you are having trouble locating the malfunction and eliminating it in Moscow and other big cities. It is preferable to hire craftsmen and avoid attempting to fix it yourself until the warranty has expired.

Replacing the bearing

As these parts wear out quickly, bearing problems frequently result in malfunctions with the device’s operation. They are reasonably priced, and replacing them on your own without expert assistance is simple. To remove the retaining ring, you must first remove the box that contains the motor, the lightbulb, and the drive gear.

Although it is preferable to remove the bearings with a specialized tool, you can complete the task without one by carefully knocking out the shaft, installing it on the support, and then removing the bearings with a pipe that is the appropriate diameter.

After replacing the damaged parts with new ones, lubricate the shaft with lithol and assemble the device (you have to repeat all the previous steps in reverse order to accomplish this).

Repairing the button

As a magnetic starter, the button is also easily repairable at home. First, remove the casing. To do this, you’ll usually need a Phillips screwdriver and pliers. The five wires are then accessible. The button is then taken off once they are disconnected.

After being disassembled, the damaged part is carefully inspected. The most common need is to remove carbon deposits, which can be done with fine-grained sandpaper. Then put everything together.

Repairing the belt and replacing the pulley

Understanding how to disassemble a concrete mixer is essential for repairing a damaged belt, and it must be done first. It is necessary to take out the box and then unplug the contacts. In certain situations, special repairs are not necessary. For example, if the belt slips but its integrity is intact, simply putting it back in its original position will restore normal operation to the device.

The belt must be replaced if it is damaged. If a portion of the rubber drive melts, you’ll know it needs to be replaced.

Damage to the pulley can also occur; typically, this is caused by heavy loads that cause the grip to weaken and the plastic component to break when it comes into contact with the steel side of the shaft. To replace, take out the pulley and the box and unscrew the bolts holding the electric motor in place. It is loosening the retaining ring. The outdated pulley is then taken out. Its place is taken over by a new component. The order of assembly for the concrete mixer is reversed.

Repair of the drive gear and crowns

In many cases, you can fix a broken bulb without having to remove it. To complete the process, a 10 key is used to unscrew the fixing bolt. Take out the gear first, then the washer. There is still a tiny key on the shaft that needs to be removed carefully. The installation is then completed by repeating the steps in reverse order with a new gear.

Crown wheel breaks are less frequent. You’ll need to loosen the bolts holding the component on the pear in order to fix them. You must dismantle the concrete mixer because these components are fixed to the tank’s bottom. After removing the tank from the crossbar, replace the old crown gear with a new one by unscrewing it. It is advised to change the leading one at the same time.

Replacing the electric motor capacitor

The electric motor needs to be fixed if the concrete mixer hums but won’t start. The capacitor needs to be taken apart and replaced with a new one that fits the specifications of the concrete mixer.

In order to buy a suitable replacement, it is crucial to carefully review the information on the part’s body. If the spare part you buy is insufficient, the work won’t get better, and you’ll have to perform the recommended manipulations again.

Disconnect the wires from the capacitor after removing the casing. Subsequently, the damaged component is extracted (a malfunction can be identified by the capacitor swelling or releasing an overpowering charred plastic odor), a replacement is inserted, the cables are linked, and the housing is put back in its original location.

You can save time and money by doing your own concrete mixer repair. You can maintain your mixer’s functionality without the assistance of a professional by learning how to replace the bearing, take out the drum, and fix other common problems.

Whenever you hear strange noises or feel rough operation, it’s usually time to change the bearing. If you have the correct equipment and a little perseverance, this task should be easy. To prevent any damage to the mixer, be sure to carefully follow the instructions.

Although removing the drum might seem difficult, cleaning and some repairs require it. You can access parts that require attention by detaching the drum by following a few easy steps. This upkeep measure contributes to your mixer’s longer lifespan.

Other common malfunctions, like electrical issues or worn-out parts, can also be fixed with a bit of know-how. Familiarizing yourself with the mixer’s components and how they work can empower you to tackle these repairs confidently.

All things considered, it’s not as difficult to maintain and repair your concrete mixer as it might seem. You can maintain the smooth and effective operation of your mixer for many years to come with a few simple tools and a willingness to learn.

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Marina Petrova

Candidate of Technical Sciences and teacher of the Faculty of Construction. In my articles, I talk about the latest scientific discoveries and innovations in the field of cement and concrete technologies.

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