Hydraulic Motor Repairs

Do you need a hydraulic motor or swing motor repair? Fill out the form and one of our team will be in touch with you to organise getting your hydraulic motor repaired as soon as possible. 

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Hydraulic motor maintenance and repair services

Need hydraulic motor maintenance or repairs fast? Don’t allow your productivity to be held up when hydraulic problems strike. Trust CJ Plant today.

For all your hydraulic motor servicing and critical breakdowns, you need a company with the right experience and expertise. We pride ourselves on being hydraulic experts and offer a range of services from our premium in-house workshop, including all types of hydraulic motor repairs and reconditioning.

Swing motor repairs

Swing motors play an essential role in the operation of equipment like excavators, tower cranes, rotating platforms and drilling rigs. When these motors start to malfunction, it can bring operations to an abrupt halt. Luckily, at Hydraulic, we offer swing motor repairs for when your machinery starts showing signs of malfunction.

Repairs are best for correcting minor issues where the overall motor condition is good but certain parts aren’t performing as expected. Malfunctions can be caused by internal failures such as cracks, leaks or a burnt motor. In most cases, a full replacement of the swing motor isn’t required; a repair allows you to keep the original motor, reducing the upfront costs associated with replacement.

Frequently Asked Questions

We have a range of motor test facilities on-site at our repair shop, which allows us to get into the nitty-gritty of the parts to identify and fix the issue fast.

We’re able to repair (or replace with genuine parts if deemed necessary) both the hydraulic pump and motor of most leading manufacturers. Our fault-finding service is second to none, and our engineers are all experienced with a range of common and uncommon hydraulic motor problems – meaning we can offer you fast results.

Hydraulic motors are built to last. They might hit snags during their operation, but they shouldn’t need replacing often. However, with the best will in the world, we can’t always fix the hydraulic motor if the damage is extensive or the issue is too far gone.

We can offer new units, new equipment, or new parts as required – but know that our highly skilled engineers will always try to repair your hydraulic motor before replacement is looked into. This will be cheaper for you in the long run, and we’re all about cutting costs for our customers.

Maintaining your hydraulic motors is a matter of scheduling regular checks.

  • Hydraulic fluid checks: Regularly test the hydraulic fluid levels and maintain a proper level that is clear of contamination. Sample the fluid for any changes in colour and odour. If the water takes on a milky hue, then it may be contaminated.
  • Change the filters: Filters keep pollutants that will lead to some of the more common failures of a hydraulic motor. Considering it’s not easy to spot contamination when you see it, it may be a good idea to simply have filters on hand and schedule their changing.
  • Replace seals: Seals are responsible for keeping the motor from leaking. Over time they will degrade, especially if contamination has been in your motor for any period of time.
  • Hoses and fittings: All hoses and fittings should be checked for damage. This could be from fraying, stretching and kink. Anything with dents, or signs of corrosion, needs to be replaced. On top of that, ensure couplers are clean and secure any fittings that can be.

The temperature needs to be regulated within a motor to ensure its smooth function, and to avoid the following: 

  • Fluid Thickening – Viscosity is the resistance a liquid has to part from itself. For example, when water gathers on a ceiling and drips slowly. This is gravity pulling away water. Low temperatures can increase the resistance of the hydraulic oil within the pump, leading not only to productivity issues but also to cavitation – more on this in the next FAQ. 
  • Fluid Thinning: Meeting a certain heat threshold can cause a motor’s fluid to thin. This makes lubrication difficult, and it also makes escape in the form of leaks much easier. 
  • Fluid Oxidisation: Oxidisation is the process of a substance being mixed with oxygen. Whilst heat can cause fluid to thin, as explained in the last example, extreme heat can cause oxidisation, thereby thickening the fluid. Sometimes it becomes so thick that it blocks the flow of water, which also causes a buildup of heat due to the motor’s inability to dissipate and regulate its temperature. 

Both air and water can pollute a hydraulic motor. The following are the three different types of contamination that can destroy a piece of machinery. 

  • Cavitation is the process of the separation and implosion of the dissolved air within hydraulic oil. The implosion results not only in a distinct whining sound but also causes damage to the pump over a period of time. This damage can also spread to other components within the motor. 
  • Aeration is the process of air invading the motor from the outside. This is almost always due to some sort of structural damage on the motor, such as loose connections, or even a leak. The contamination makes a knocking sound. 
  • Water Contamination is a fairly basic process. It relies on there already being structural damage to the machine. If the water receives too much oxygen (oxidation) or falls in temperature to the point of freezing, it will degrade the inner components of the motor over time. The fluid will then take on a milk-like look.