Common Problems of Hydraulic Vane Pumps and Motors

Blog | November 26th, 2020

One type of pump that is used in various machinery is a hydraulic vane pump. This pump works through the turning action of vanes that are carried out by the rotation of the drive shaft. Once the back of the vanes is applied with pressure, they are subsequently forced out against the outer ring face of the pump. 

Hydraulic vane pumps and their motors are maximised to run on low pressure, industrial power units, which include dozers, graders, shovels, cranes, lifts, conveyors, and drive machines. Even though these pumps and motors are used for durable equipment, one necessary concern about them is that they can easily get damaged once they are not cleaned regularly. And since they have mechanical parts, they can eventually fail after a long time of use and exposure to surrounding elements or conditions.

If you currently possess machinery with vane pumps and motors, then here are some of the most common problems that you may encounter as you use them.

Dirty Hydraulic Fluid

One of the most common problems of hydraulic vane pumps and motors is the presence of dirty hydraulic fluid. Dirty hydraulic fluid can occur if your pumps and motors are not cleaned and maintained regularly. The use of ineffective filter solutions and contamination-control devices can also cause the occurrence of dirty hydraulic fluid. Other sources of dirty hydraulic fluid normally come from contaminated new oil, built-in contamination, externally sourced contamination, and internally generated contamination.

Particles Build-up

Another problem that your hydraulic vane pumps and motors may obtain is the accumulation of metal particles that come off their internal components. As these pumps and motors run and function, their components might deteriorate after a long time of use. As these particles gradually come off, they may accumulate inside and affect the performance of key internal components. Without removing them, they can subsequently disrupt the whole operations of a machine.

Cavitation Damages

The components of vane pumps and motors can obtain damages out of cavitation. It is the formation of bubbles in the fluid that tend to implode after a specific amount of time. These bubbles have high temperatures. So, once they started to implode, they can easily weaken and melt the components of vane pumps, motors, and other surrounding components. Cavitation can be caused by the air leaking into the fluid. It can likewise be generated by high forces of the liquid as it moves around the system.

Erosion Damages

Somehow similar to cavitation damages, erosion damages typically occur whenever a high-speed oil stream sends out contaminants against the surface of the pump or motor. The damages brought by erosion can usually found at metering edges or critical surfaces. 

Catastrophic Failures

Damages that are caused by catastrophic failures can be spotted easily since there are components that have already been destroyed or ruined. Catastrophic failures are often caused by over-pressurisation, airlocks, improper modifications, misalignment, incorrect assembly procedures, and component misapplications. The long-time presence of dirty hydraulic fluid and particles build-up is known to easily contribute to the occurrence of problems related to catastrophic failures.

For hydraulic vane pumps and motors repairs and maintenance, feel free to contact us at Mobile Hydraulic Specialties.

Mobile Hydraulic Specialties Pty Ltd

Factory 89, 38-40 Popes Road
Keysborough, Victoria, 3173

Phone: (03) 9798-6511

Optimized by


Contact Us

Mobile Hydraulic Specialties Pty Ltd

Phone: (03) 9798-6511
Address: Factory 89, 38-40 Popes Road, Keysborough, Victoria, 3173