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How to repair hydraulic motors and pumps?

The field of hydraulics is a sensitive one and the equipment we work with is often complex and delicate. Therefore, its maintenance is extremely sensitive and, of course, a matter of importance. Whether it's hydraulic motors or pumps, when it comes to repair and maintenance, it's often a matter for a specialist. So how does it work and why ? Let's find out at once !

Hydraulic motors

Before talking about their maintenance, let's go back to the hydraulic motors themselves.

A hydraulic motor is a motor that can be described as isothermal. Its function is to generate mechanical energy by using hydraulic power. It is the transformation of hydraulic into mechanical that creates the condition for its operation, which can be described as hydrostatic transmission.

The action of generating power in this way uses fluid pressure. The engine does not work alone, so to speak. It is the combination of pumps, valves and other reservoirs that pressurize these fluids. These fluids are then channeled to the engine to produce mechanical energy and thus ensure its operation. Depending on their nature and function, a motor can perform a rotary or linear movement.

Note that this transformation is reversible. This is a characteristic of most hydraulic motors.

There are four types of hydraulic motors :

  • Vane. It has a rotor equipped with blades, which, under the pressure of the fluid, causes the rotation of the coupling shaft.
  • With axial pistons. These pistons are driven by pressure and, as they rotate, force the vortex to rotate by means of a linkage.
  • With radial pistons. Here, the pistons rotate on a cam, which allows several strokes to be available. The piston pushes on its connecting rod on the relevant cam and thus acts on the motor coupling shaft.
  • With gears. The latter is equipped with toothed wheels, one of which engages the other to cause a rotation when a fluid passes through them.

Since a pump itself uses hydraulic motors, but specializes in pumping a liquid, it is not necessary to dwell on its specifics. Now that we've done a quick review, let's move on to the maintenance and repair of hydraulic motors and pumps. Are you ready ? Let's go !

Repair and maintenance

Before we talk about repair, we can focus on maintenance. These sensitive devices must be maintained often and with great care. They are often put to the test and their durability depends of course on their careful maintenance.

Maintenance and inspection dates must be respected and our machines must be regularly inspected by specialized technicians. We are talking here about specific machines and this maintenance cannot be improvised by a handyman from the factory! Unfortunately, not all maintenance can avoid breakage or damage to specific parts. In such cases, maintenance is not enough and there is no question of tinkering to last longer.

A technician must be called in to isolate the defective part, identify the reasons for the breakdown and do what is necessary. A referral to a maintenance department is sometimes even necessary when the damage is too serious or the affected part too sensitive to be changed and repaired on site.

In view of the importance of monitoring the maintenance and repair of hydraulic motors and pumps, contracts are often concluded with specialized companies or even the original supplier. These contracts include maintenance and even the purchase of parts, etc.

Now you know everything !