How to Replace Tandem Vane Pumps, Says Terex

Terex Utilities recently published a technical tip on changing the direction of flow on a tandem vane pump. This tip is applicable to certain Terex digger derricks and aerial devices. If a pump is installed in reverse during the replacement process, it could aerate the oil and potentially damage the pump and other components.

The direction of rotation depends on the transmission and PTO that the truck is equipped with. Tech Tip #71 helps customers identify the pump direction of rotation so that it can be installed correctly. It also provides step-by-step instructions and visuals for removing the Tandem Vane Pump, how to reverse the direction flow, and reassemble the pump.

Technical Tips are developed by Terex’s Technical Service and Support team based on questions frequently asked by customers. The tips are available under the “Technical Support” tab on the Terex Utilities website.