Many pieces of equipment are more versatile than they might initially appear, particularly when the right accessories are available. While some might look at a heavy bucket loader and assume that the machine is only suited to a narrow range of duties, that sometimes proves not to be the case. Many different kinds of heavy equipment, from farming tractors to backhoes used in construction, are fitted with power take off (PTO) connections that can be used to extend their range of capabilities. Choosing the right device to attach to a given PTO can enable functionality that might normally not be associated with a particular style of equipment.

Devices that hook to PTO connections also vary in terms of just how much versatility they themselves boast. A suitable auger attachment might extend the capabilities of a bulldozer in ways that mesh well with the requirements of a particular project, but this is not to say that such an accessory will necessarily be called for often. On the other hand, some PTO accessories prove themselves again and again by providing service that ends up being valuable across a much wider range of work.

The apparently humble roller vane pump, for instance, is found attached to PTO ports in a huge number of different settings. Also sometimes called an allman pump, a pump of this design often makes a good fit for the PTO style of power transfer. With an inner shaft that holds two spring-loaded vanes, the allman pump can be used for everything from spreading fertilizer or pesticide on a farm to powering hydraulic equipment of other kinds.

Understanding what features will make the most sense to look for in a roller vane pump can make this versatile kind of accessory even more useful. For one thing, every pump will be rated according to the pressure it can develop, with this figure scaling, to an extent, with the power that is applied. Attempting to operate a pump beyond these limits will typically result in problems like the failure of internal seals, whether temporarily or for good. It will therefore always be advisable both to select a pump that is capable of handling the pressures needed for a particular project and to be aware of these limits while actually making use of it.

Most pumps will also be rated with regard to their maximum speed of operation, and going beyond this limit can once again lead to failure. Between basic considerations like these and respecting recommendations regarding fluid temperatures and the like, however, many find that pumps of this style turn out to be an extremely helpful way to make good use of a PTO.