• 86 411 86715816
  • cnkonic@konic-gearbox.com
 8 Warning Signs That You need Industrial Gearbox Repair

8 Warning Signs That You need Industrial Gearbox Repair


Industrial gearboxes used in a wide range of applications. Such as mechanical transmissions, heavy mining equipment. building and engineering machinery. At the same time , Industrial gearbox repair and maintenance. That also constitute a vital part of industrial gearbox services. because a hostile working environment, long-term wear and tear. overload work operation, and a variety of other factors. Then, as a manufacturer of industrial gear box .

KONIC have lots of industrial gear box repair expertises. and we summed up What signs you need to repair your industrial gearbox. How do I check my gearbox condition to judge that require maintenance and repair. Using these signals, users can simultaneously self-exclude small problems based on our experience. This also you need to konw several issues that must skilled industrial gearbox manufacturers to check.

Table of Contents

Before Proceeding With Industrial Gearbox Repair

We strongly advise avoiding repairing industrial gearboxes privately or aggressively, and instead to call a professional industrial gearbox repairer, ideally under the guidance of the original manufacturer of the gearbox, for repair and disassembly. For example, the repair of damaged gears, the selection of accessories, the selection of lubricants, and other difficulties need to be handled by a skilled maintenance team. This will save you quite a bit of time and money!

There are several symptoms that indicate your industrial gearbox may need repairs. Here are some common signs to watch out for:

Warning Signs That need Industrial Gearbox Repair

1.Unusual noises:

Unusual noises coming from an industrial gearbox can indicate various problems. Here are some specific types of noises and their potential causes:

Grinding or crunching noise: This noise may suggest worn or damaged gears. Sometime easily caused by improper lubrication, misalignment, or excessive load on the gearbox.

→Rattling or vibrating noise:

Loose or worn components such as bearings, shafts. or gears can create rattling or vibrating noises. It may also indicate a problem with the gearbox housing or mounting.

→Whining or humming noise:

High-pitched whining or humming sounds can be a result of worn or damaged bearings. It could be due to insufficient lubrication, contamination, or bearing failure.

→Clunking or banging noise:

Sudden clunking or banging noises might indicate loose or broken gears. damaged synchronizers, or worn-out coupling components.

→Hissing or hissing noise:

A hissing sound could be an indication of air or fluid leakage within the gearbox. It may suggest damaged seals, gaskets, or a pressure-related issue.

→Clicking or ticking noise:

Clicking or ticking noises caused by damaged or misaligned gear teeth. insufficient lubrication, or loose components within the gearbox.


Excessive vibrations in the gearbox can indicate misalignment, damaged bearings, or worn gears. These vibrations can affect the overall performance and lifespan of the gearbox. Industrial gearbox vibration easily caused by various factors. and it is essential to address them to ensure smooth and reliable operation. Here are some common causes of industrial gearbox vibrations:

konic industrial gearbox expert


Imbalance occurs when the weight distribution within the gearbox. or the connected components is uneven. This can lead to excessive vibrations. Imbalance can result from manufacturing defects, improper assembly. or wear and tear of gears or other rotating components.


It refers to the improper alignment of the gearbox shafts with the connected components. such as the motor or driven machinery. Misalignment can cause increased loads and uneven forces, resulting in vibrations.

→Wear and damage:

Over time, gears, bearings, shafts. and other internal components can experience wear and damage. This can lead to irregularities in the gear meshing, increased friction, and vibrations.

→Insufficient lubrication:

Inadequate or poor lubrication might result in higher friction. between the gears and bearings. This friction generates heat and vibrations. which can lead to additional damage if not treated.

→Loose or worn components:

Loose fasteners, bolts, couplings. or worn-out components within the gearbox can contribute to vibrations. Vibrations can also occur if key elements. such as bearing housings or gearbox mounts, become loose or damaged.


Resonance is a phenomenon where the natural frequencies of the gearbox. and its components coincide with the excitation frequencies generated during operation. This can amplify vibrations and cause significant issues. Resonance can occur due to design flaws. operating speeds, or changes in system stiffness.


Any visible oil or lubricant leakage from the gearbox is a clear indication of a problem. It could be due to worn seals, gaskets, or damaged casing. Industrial gearbox leakage can be indicative of various issues that require attention. Here are some possible causes of leakage from an industrial gearbox:


→Damaged seals or gaskets:

Seals and gaskets play a crucial role in preventing fluid. or lubricant leakage from the gearbox. Over time, they can become worn, degraded, or damaged, resulting in leakage. Common types of seals used in gearboxes include oil seals, lip seals, and mechanical seals.

→Excessive pressure or overfilling:

If the gearbox overfilled with lubricant. or subjected to excessive pressure, it can lead to leakage. High pressure can cause seals to fail or blow out, resulting in fluid escaping from the gearbox.

→Cracked or damaged gearbox housing:

The gearbox housing or casing may develop cracks. or damage due to mechanical stress, impact, or improper handling. Such damage can create pathways for fluids to leak out of the gearbox.

→Loose or improperly tightened connections:

Leaks can occur if there are loose or improperly tightened connections within the gearbox,. such as pipe fittings, hose connections, or fasteners. Vibrations or movement during operation can exacerbate these leaks.

→Shaft seal wear:

The shaft seal, located where the gearbox output shaft exits the housing. can wear over time due to friction and heat. This wear can result in fluid leakage around the shaft area.

→Contaminated lubricant:

If the lubricant inside the gearbox becomes contaminated with debris, dirt, or foreign particles. it can affect the integrity of the seals and lead to leakage.


If the gearbox feels excessively hot to the touch. or you notice an increase in temperature during operation. it may be a result of insufficient lubrication. excessive friction, or other internal issues. Here are some potential causes of industrial gearbox overheating:

Insufficient lubrication: Inadequate lubrication is a common cause of gearbox overheating. If the lubricant level is too low or the lubricant has degraded. it can lead to increased friction and heat generation within the gearbox.

→Lubricant contamination:

If the lubricant becomes contaminated with debris, dirt, water. or other substances, it can hinder its effectiveness in reducing friction and heat. Contaminants can cause increased friction and contribute to overheating.

→Overloading or excessive torque:

If the gearbox subjected to loads beyond its design capacity. or experiences excessive torque. it can result in increased friction and heat generation. Overloading can cause the gearbox to operate outside its optimal temperature range.

→Worn or damaged components:

Worn or damaged gears, bearings, shafts. or other internal components can result in increased friction and heat. This wil caused by normal wear and tear, improper maintenance, or excessive loads.

→Inadequate ventilation or cooling:

If the gearbox located in an area with poor ventilation. or insufficient cooling systems, it can contribute to overheating. Inadequate dissipation of heat can lead to a temperature buildup within the gearbox.

→Incorrect lubricant selection:

The use of an inappropriate lubricant, such as one with the wrong viscosity or additives. can impact the gearbox’s ability to dissipate heat properly. It is essential to use lubricants recommended by the gearbox manufacturer.

5.Decreased performance:

A gearbox in need of repair may experience a decrease in overall performance. This can manifest as reduced power output, slower operation. or difficulty in changing gears smoothly.

Decrease in the performance can indicate underlying issues that require attention. Here are some potential causes of decreased performance in an industrial gearbox:

→Wear or damage to gears:

Over time, gears can wear down or become damaged, leading to a decrease in performance. This can result in reduced power transmission, inefficient gear meshing. or gear slipping, impacting the overall functionality of the gearbox.

→Bearing wear or failure:

Bearings support the rotating components within the gearbox and facilitate smooth operation. If the bearings become worn or fail, it can result in increased friction, excessive noise. and decreased performance.

→Insufficient lubrication:

Proper lubrication is crucial for reducing friction. dissipating heat, and protecting the gearbox components. Insufficient lubrication or using the wrong type of lubricant can lead to increased wear. decreased efficiency, and a decline in overall performance.


If the gearbox becomes contaminated with debris, dirt, moisture. or other foreign substances, it can hinder the performance. Contamination can lead to increased friction, accelerated wear. and compromised functionality of the gearbox.

→Worn or damaged seals:

Seals prevent leakage and help maintain the integrity of the gearbox. If the seals become worn or damaged, it can result in fluid leakage, contamination. and decreased performance.

→Electrical or control system issues:

In some cases, decreased performance attributed to electrical or control system problems. such as faulty sensors, incorrect voltage supply, or issues with the control signals.

6.Gear slipping or sticking:

If you notice gears slipping out of place or difficulty in engaging or disengaging gears. it could indicate worn or damaged gears, synchronizers, or linkage components. Here are some potential causes of gear slipping or sticking:

→Worn or damaged gears:

Over time, gears can wear down or suffer damage. due to excessive loads, inadequate lubrication, or misalignment. This wear can cause the gears to slip or fail to engage properly, leading to slipping or sticking.

→Synchronizer issues:

Gearboxes equipped with synchronizers, such as in manual transmissions. rely on these components to ensure smooth gear engagement. If the synchronizers worn, damaged, or improperly adjusted. they may not function correctly, causing gear slipping or sticking.

→Linkage problems:

In manual gearboxes, the linkage system connects the gear shift lever to the gearbox. If the linkage components, such as rods or cables, worn, damaged. or improperly adjusted, it can result in difficulties in shifting gears, leading to slipping or sticking.

→Contamination or debris:

The presence of foreign particles, debris. or contamination within the gearbox can interfere with the smooth operation of the gears. It can cause them to slip or stick during gear engagement.

7.Increased energy consumption:

A faulty gearbox may lead to increased energy consumption due to inefficient power transmission. This could result in higher operating costs and decreased overall efficiency. Here are some potential causes of increased energy consumption:

→Inefficient lubrication:

Inadequate or improper lubrication can lead to increased friction . and energy losses within the gearbox. Insufficient lubricant levels or using lubricants with the wrong viscosity. or additives can result in higher energy consumption.

→Worn or damaged gears and bearings:

Worn or damaged gears and bearings result in increased friction and energy losses. If the gears or bearings are not functioning optimally, more energy need required. to maintain the desired speed and transmit power efficiently.

→Excessive load or overloading:

If the gearbox subjected to loads beyond its design capacity or experiences excessive torque. it can result in increased energy consumption. Overloading the gearbox puts additional strain on the components, causing higher energy requirements.

→Inefficient motor or drive system:

The motor driving the gearbox and the overall drive system. can contribute to increased energy consumption. If the motor oversized, improperly selected, or inefficient. it can consume more energy than necessary.

→Poor ventilation or cooling:

Inadequate ventilation or cooling of the gearbox . can cause it to operate at higher temperatures. leading to increased energy consumption. Heat buildup within the gearbox can result in higher energy losses and reduced efficiency.

8.Regular maintenance inspections:

Regular maintenance inspections are crucial to identify potential issues. with the gearbox before they escalate into major problems. If inspections reveal wear and tear, corrosion. or other signs of damage, it’s advisable to consider repairs.

We constantly advise our customers to maintain their industrial gearboxes on a regular basis, since this extends the gearbox’s lifespan and enables for the early diagnosis of possible problems with the gearbox’s operation. Furthermore, KONIC gearbox offers our customers one-on-one qualified technical guidance.

Leave a Reply

Your email address will not be published. Required fields are marked *