News and Helpful Videos

At our Hydrostatic Pump Repair Site, we offer many types of Hydrostatic Transmission Repair and information relating to Hydrostatic PartsToday we will discuss: Sundstrand Sauer Danfoss Series 20 – Heat Exchanger & Case DrainThe motor and pump need a case drain to let out hot fluid from the system. The motor will be drained from its topmost drain port to make sure the case stays full of fluid. The motor case drain is then hooked up to the lower drain port on the pump housing and out the upper port. A heat exchanger that has a bypass valve, needs to...

You will come across three types of hydraulic pumps: piston pumps, vane pumps, and gear pumps. 3 Types of Hydraulic Pumps Piston pumps are the most common and also the most capable of performing complex tasks. These are the hydraulic pumps that are most commonly found in manufacturing settings. They are the pumps used in high-pressure applications. A piston pump is a positive displacement pump that moves water by using a high-pressure seal that works reciprocally with a piston. This configuration enables them to operate under high pressure without affecting flow rate noticeably. Vane Pumps: These are less common and...

At our Hydrostatic Pump Repair Site, we offer many types of Hydrostatic Transmission Repair and information relating to Hydrostatic PartsToday we will discuss: Sauer Danfoss Series 90 Torque Values To Turn a Shaft Rotate the motor shaft with a torque wrench to make sure it is put on right. When it is installed correctly, the torque needed to turn the shaft (after break away) needs to be within the values shown in the chart. If you need further assistance with this, please call us at 800-361-0068email: sales@hydrostatic-transmission.com

At our Hydrostatic Pump Repair Site, we offer many types of Hydrostatic Transmission Repair and information relating to Hydrostatic PartsToday we will discuss: Sundstrand Sauer Danfoss Series 90 – Charge Pump ChangeIn the Series 90 130cc Pump the charge pump is making changes, in that it is change the number of parts that go into a charge pump to fewer parts. This will help with the reliability and performance of the pump.The auxiliary and pad there are changes in the charge pump cover, is now rotation dependent. It will be labeled LH or RH. The non auxiliary pad cover is...

At our Hydrostatic Pump Repair Site, we offer many types of Hydrostatic Transmission Repair and information relating to Hydrostatic PartsToday we will discuss Sundstrand Sauer Danfoss Series 90 – End Cap Gasket ChangeIn this service bulletin SB 1989-009 the 55cc end cap gasket design is changing to allow a single part number gasket to be used for both of the twin port and axial port end cap choices.Both of the old style end caps will be no longer available as service parts. The new end caps can be used on older models. But the gaskets must be used on the...