Industrial gearboxes are at the heart of any factory’s operations. As you may know all too well, if your gearbox breaks down unexpectedly, this can lead to disruptions in your workflow, lower productivity, unmet production goals, and higher labor costs. 

To minimize the negative impact of a severely damaged gearbox on your operations, you need to resolve the problem as quickly as possible. More often than not, one of the best ways to do this is through a gearbox overhaul – a cheaper and less time-consuming alternative to replacing the gearbox with a brand-new unit. 

Let’s take an in-depth look at what the gearbox overhaul process consists of, and how to determine whether you need a gearbox overhaul or replacement (we’ll look at factors such as the industrial gearbox overhaul efficiency and cost).   

What is an Industrial Gearbox Overhaul?

A gearbox overhaul (also known as a gearbox rebuild) involves disassembling your gearbox unit and breaking it down into separate components.  

If you’re working with a company who specializes in professional gearbox overhaul services like Houston Pump and Gear, the technicians will clean and examine each gearbox part to understand whether the faulty components can be repaired or need replacement. 

A gearbox overhaul is a more serious procedure than other standard gearbox repairs (which usually involve fixing only the broken parts.) An overhaul is recommended only when the damage is unknown or quite severe. The advantage of the gearbox overhaul process is that it’s so thorough that it fixes the immediate issue while also preventing serious problems from occurring in the future.

Next, let’s check the main steps that our specialists at Houston Pump and Gear follow during the gearbox overhaul process. 

The Gearbox Overhaul Process in 14 Steps

The gearbox overhaul procedure at Houston Pump and Gear usually includes: 

Step 1: Identify the gearbox make and model and disassemble the unit. 

Step 2: Evaluate the gearbox condition and repairs needed. 

Step 3: Share the gearbox health analysis, preliminary custom quote, and overhaul timeframe estimates with yourself and your team. 

Step 4: Clean the gearbox components to remove any remaining oils and lubricants from them. 

Step 5: Perform failure analysis and evaluate the components’ wear and tear.  

Step 6: Identify which parts can be repaired and which need to be rebuilt or remanufactured 

Step 7: Check and inspect all bearings, shafts, and gears. 

Step 8: Replace all parts that have worn out friction surfaces, such as bearing seals and gaskets. 

Step 9: Repair and rebuild all damaged gears, shafts, and other components. 

Step 10: Reverse engineer new parts if needed. 

Step 11: Assemble the repaired gearbox according to the O.E.M instructions. 

Step 12: Run industrial gearbox performance tests to ensure the repaired unit performs according to the standards. 

Step 13: Repaint the gearbox external casing.  

Step 14: Prepare gearbox for shipment.  

Factors to Consider Before Deciding on a Gearbox Overhaul

If your gearbox is severely damaged, you can either replace it with a new one or opt for an industrial gearbox overhaul. 

If you’re still not sure whether you need a gearbox overhaul or a unit replacement, consider these factors: 

Gearbox Rebuild Price and Other Costs

If you want to repair an old piece of equipment, it is important to consider the cost of the overhaul as well as the impact on the unit’s remaining service life. Overhauls are often substantially more cost effective than purchasing replacement equipment. Repair costs can often save 40-50% when compared to purchasing new.  

On the other hand, buying a new unit includes its purchase and operating costs, the potential revenue increase it might result in, and its salvage and market value.  

Once you have all the numbers, you can easily determine the annual cost for each and compare them. 

Equipment’s Age

If you have a comparatively new gearbox unit, performing an extensive repair procedure will make more sense than replacing it.  

However, if you’re dealing with old machinery, it will likely have higher maintenance costs and will need more extensive repairs, which will decrease your return on investment. In this case, you can consider a replacement. Unless, however, the piece of equipment is obsolete, in which case replacement is not feasible. 


While an overhaul involves an extensive repair procedure, it is a much faster option than buying a new piece of equipment. It also helps to identify and eliminate other existing problems that could eventually cause the unit to fail and result in additional downtime. A regular preventative maintenance and gearbox overhaul program will help ensure your operations won’t be disrupted unexpectedly. 

On the other hand, the delivery of new equipment can take several months (in some cases years) and result in extra time for installation and training. Current supply chain and labor constraints have only exacerbated excessively long lead times from OEM’s.  


Think about whether your overhauled equipment will sustain its efficiency in the long run. Additionally, try to understand whether replacing it with a newer and more advanced unit will significantly improve your operating and cost efficiency. 


Even after a thorough overhaul procedure has been completed, it is important to do regular safety and maintenance checks. If your equipment operates according to all safety standards, replacing it is not needed. 

Minimize the Cost of Your Industrial Gearbox Overhaul

Now that you know the basics of a gearbox overhaul, including the gearbox overhaul steps and factors such as gearbox rebuild price, you can consider if a gearbox overhaul is what fits your specific circumstances.  

If you’re in need of a professional gearbox repair service, you can reach out to Houston Pump and Gear’s expert technicians. We provide gearbox overhaul in Texas as well as a wide range of services, including Flender gearbox repair, Falk gearbox repair, and pump overhaul across the US, Canada, and Mexico.