Sundstrand Sauer Danfoss Series 20 Good and Bad Charge Pumps In diagram #1 you can see it is excellent conditions. It has not marks, burrs so that there is no leaking or air getting into the system. And it should be free of contamination, so that it doesn’t get into your unit and cause more…
Read moreSundstrand Sauer Danfoss Series 40 Three Way EDC Control FNR The FNR (forward, neutral, reverse) EDC has a solenoid operated 3 way and 4 way valve to take the pump displacement from neutral to the highest level of displacement in either direction it goes in. When the solenoid is rived up, the charge pressure…
Read moreSundstrand Sauer Danfoss Series 40 M46 PV EDC and HDC Controls The EDC is is almost the same as the HDC, in that the EDC uses an electrical hydraulic pressure control pilot valve to keep the pilot pressure under control. THE PCP valve changes it from an electrical signal to a hydraulic one so that…
Read moreSundstrand Sauer Danfoss Series 40 Charge Pump Filtration All series 40 units have charge pressure filtration available. The filter is mounted and is near the circuit after the charge pump (per the diagram). The ratings for the filters are 34.5 bar (500 PSI) pressure A 100- 125 screen in the reservoir or in the charge…
Read moreSundstrand Sauer Danfoss Series 40 Shaft Options Sundstrand Sauer Danfoss units come with all kinds of shafts: Tapered Splined Straight Keyed Regular shaft sizes and torque ratings are listed on the chart. Torque ratings usually don’t have external radial loading. Ratings for splined shafts show spline tooth wear. The highest rating for torque is…
Read moreAt our Hydrostatic Pump Repair Site, we offer many types of Hydrostatic Transmission Repair and information relating to Hydrostatic Parts Today we will discuss: Hydraulic Circuitry – Rapid Advanced Circuit In Hydraulic Circuitry a rapid traverse is needed until the machining portion of the stroke is reached. This is known as rapid advance and feed…
Read moreSundstrand Sauer Danfoss Series 90 Removal of Valve Plate from the Cylinder Block Kit On the diagram you will see item (C80) the valve plate, this is the item be eliminated from the Series 90 cylinder block on the variable pump. There are too many choices on the valve plates now. If you need a…
Read moreSundstrand Sauer Danfoss Series 40 Hydraulic Fluid There are few standards at which hydraulic fluid is rated: *operation *oxidation *rust and foam inhibitors They have API CD engine oils per SAE J183 M2C33F automatic transmission fluid. Dexron llor llE meeting Allison C3 or Caterpillar TO-2 and other agricultural tractor fluids. Hydraulic fluids per DIN…
Read moreSundstrand Sauer Danfoss Series 40 Charge Pump Flow & Power Requirements Some of the features we are fixing to mention may contradict the 10% displacement rule to some degree. operation at low input speeds below 1500 RPM auxiliary flow conditions high torque low speed motors shock loadings really long system lines If any of…
Read moreHydrostatic Transmission Service Warranty Hydrostatic Transmission Service, LLC warrants our hydraulic-hydrostatic repaired pump or motor to be free of any defects in workmanship for a period of one (1) year from the date of installation if the following conditions are met by the customer: A. The hydraulic-hydrostatic reservoir must be cleaned out with diesel…
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