A comprehensive guide on hydraulic hand pump repair

Hydraulic pumps are used in several manufacturing processes. If you utilise them in your line of business, you should keep them up and running as much as feasible.

We’ve seen and fixed a wide range of double acting hydraulic hand pumps, and we can get yours back to you quickly if it breaks down. Here’s some additional information on the many sorts of hydraulic pumps we work on and how we do it.

What Different Types of Hydraulic Pumps Are There?

You’ll come across three different types of hydraulic pumps: piston pumps, vane pumps, and gear pumps.

1. Piston Pumps:

The most frequent and also the most capable of difficult operations are piston pumps. These are the hydraulic pumps that are most commonly used in manufacturing. 

These are the pumps that you’ll employ in high-pressure situations. A piston pump is a positive displacement pump that moves water by using a high-pressure seal that reciprocates with a piston. They can run at high pressure without compromising flow rate because of this arrangement.

2. Vane Pumps:

Vane pumps are less frequent and simpler pumps that may be used for low-pressure, high-flow applications. Flexible vanes, swinging vanes, rolling vanes, external vanes, and sliding vanes are all used in vane pumps, which are positive displacement pumps. The vanes sweep liquid from one side of the cavity inside the motor to the other and push it through discharge holes in the cam as the rotor rotates.

3. Gear Pumps:

The simplest basic hydraulic pump you can use is a gear pump. This pump is primarily used for single, simple applications. Gear pumps function by displacing water by meshing two gears. The gears split as they revolve, generating suction that draws water into the pump, which it then displaces when the gears mesh.

Problems with Hydraulic Pumps

Wear is the most typical issue you’ll run across with any hydraulic pump. Hydraulic pumps, like other mechanical parts, wear down over time. When it comes to hydraulic pumps, contamination and heat concerns are the most common causes of premature wear.

Varying components need different levels of attention.

Cleaning, flushing, regrinding, and remachining components and reassembling them into a whole unit is not a repair function. There’s more to it than that. There are three types of hydraulic products: dynamic, intermittent-dynamic, and static.

Double acting hydraulic hand pumps, for example, are dynamic items that require constant operation. Pumps in a system are likely to run at all times, not necessarily at full load, but at a low speed. As a result, natural wear and tear in the mating components is significantly more prevalent than in other hydraulic goods over time.

Pumps, as a result, are more likely than other hydraulic goods to fail within and beyond their planned life period. A rated 5 gpm pump at 1200 rpm and 100 psi, for example, runs at 1200 rpm all of the time, even if the machine is not in cycle or no-load mode. The life duration of any pump, whether piston, vane, or gear, is determined by its duty cycle, design, and application.

Hydraulic motors, directional valves, and servo proportional valves are examples of intermittent–dynamic hydraulic components that do not need to function continuously in a system. 

In the vast majority of cases, these units do not run at all during the machine’s or equipment’s whole cycle. Consider hydraulic motors, which are often only used for a limited duration in a system. The motor is either idle or not running at all the remainder of the time. Of course, there are certain exceptions, such as in the case of conveyor belts.

In the same way, most sliding spool directional valves and other sliding spool operations in a system do not run all of the time. As a result, during a given time period or duty cycle, the motors and directional valves in a hydraulic system will experience less wear and tear than a hydraulic pump. These kind of equipment have lower inherent failure rates than hydraulic pumps.

Static hydraulic products are those that have virtually “open-close” internal operations in a system. In other words, the interior components of such devices experience far less natural wear and tear, resulting in a substantially longer product life expectancy than the other two groups. This category includes pressure, flow, sequence, and check valves, as well as inserts.

Identifying the most appropriate service for each component

Repair – A repair technique, simply said, is confined to restoring an old, failing component to its original shape and size. Although all failed old components may potentially be fixed, this should not be done since some old, failed components are beyond repair and may not perform as well as the original. 

This is why the repair technique for each individual component is so important for the entire machine to work according to its original specifications.

Pumps, motors, valves, controllers, and their parts could all be fixed in the hydraulic industry as long as the component dimensions, tolerances, and clearances were all within the specified limits.

Rebuild — The word “re” refers to the act of starting over. This implies that a used, failed product is deconstructed first, then the causes of failure, as well as the defective components and pieces, are identified. The item is then reassembled using new or “remanufactured” components and parts. The phrase “rebuilding” is thrown about a lot and may refer to a lot of different things.

Rebuilding a hydraulic pump or motor with fully new components or parts is also an option. As a result, simply because a unit has been rebuilt does not indicate it has been “repaired.” 

The dynamic testing process must eventually be completed on a rebuilt device. This assures that the rebuilt unit meets the same engineering requirements as a new one in terms of flow, pressure, and leakage.

Remanufacturing — In the hydraulics service industry, the remanufacturing process has sparked a lot of discussion and uncertainty. Manufacturing on the current core and enhanced engineering are the two types of remanufacturing services available.

Bottom Line

Find out which service does your hydraulic pump actually needs. After you are done figuring it out, consult the experts and go for it.