• Axial Piston Over Center Hydraulic Motors
    Axial Piston Over Center Hydraulic Motors
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    Today we will discuss; Over Center Axial Piston Motors Some of the swashplates on axial piston motors have the capacity of crossing over center. When it is able to do that, it can reverse its shaft rotation without changing the direction of flow thru the motor. In the picture associated with this text, you will…

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  • Sundstrand Sauer Danfoss Series 90 – End Cap Ports
    Sundstrand Sauer Danfoss Series 90 – End Cap Ports
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    Sundstrand Sauer Danfoss Series 90 – End Cap Ports This diagram shows the end cap ports for the 55cc,75cc and the 100cc. These are for the side port and the twin ports on a variable pump. If you need additional information on this, please call or comment on this site and we will be glad…

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  • Denison Barrel and Stroking Assy to Mounting Flange
    Denison Barrel and Stroking Assy to Mounting Flange
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    Denison Barrel and Stroking Assy to Mounting Flange To start the assembly you need to put the straight thread connectors and rings into the threaded holes in the cradle. Then put the right and left hand pressure feed tubes to the connectors and make sure they are tightened. Place the mounting flange in a way…

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  • Lubrication for Bearings
    Lubrication for Bearings
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    Lubrication for Bearings t our Hydrostatic Pump Repair Site, we offer many types of Hydrostatic Transmission Repair and information relating to Hydrostatic Parts Today we will discuss Bearing Lubrication and the Reasons for Lubrication There are four functions a lubricant must perform to ensure that a bearing will provide good service: Maintain an unbroken film…

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  • John Deere Crawler 755B Track Roller
    John Deere Crawler 755B Track Roller
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    John Deere Crawler 755B Track Roller When doing the assembly align the dowel pins with the bushing holes and press bushing into the case. If they want line up, use the following instructions. Heat the bushing case (3) to 300 degrees before putting it in. This will make the bushing case expand out, letting the…

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  • Sundstrand Sauer Danfoss Series 20 Good & Bad Cylinder Blocks
    Sundstrand Sauer Danfoss Series 20 Good & Bad Cylinder Blocks
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    Sundstrand Sauer Danfoss Series 20 Good & Bad Cylinder Blocks In the top picture you can see this cylinder block is very usable. There are no nicks,burrs,discoloration or broken spots on it. And the face should be flat to seal next to the bearing plate. The piston bore holes are symmetrically round. A good block…

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  • Sundstrand Sauer Danfoss Series 20 Bearing & Slipper Face Identification
    Sundstrand Sauer Danfoss Series 20 Bearing & Slipper Face Identification
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    Sundstrand Sauer Danfoss Series 20 Bearing & Slipper Face Identification The picture shows nomenclature in describing the different areas of the piston slipper face and the bearing plate. Gives you a better understanding of what the surface of a these two parts. In may come in handy when trying to tell your supplier or mechanic…

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  • Sundstrand Sauer Danfoss Series 20 Rotating Group Identifying Parts Crucial Sides
    Sundstrand Sauer Danfoss Series 20 Rotating Group Identifying Parts Crucial Sides
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    Sundstrand Sauer Danfoss Series 20 Rotating Group Identifying Parts Crucial Sides On the diagram it shows which parts are more crucial for running than others. When excessive use, higher temperatures or even contamination hurts some parts more than others. The parts that are marked non crucial could have marks, nicks or rough surfaces and still…

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  • Sundstrand Sauer Danfoss Series 20 Valve Plates
    Sundstrand Sauer Danfoss Series 20 Valve Plates
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    Sundstrand Sauer Danfoss Series 20 Valve Plates As you can see in the diagram that these are valve plates that are good to use. In the plate at the top is flat, has no flaws on it all. If it did have nicks or burrs, you can feel them with your fingers and not to…

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  • Sundstrand Sauer Danfoss Series 20 Bi Metal Bearing Plates
    Sundstrand Sauer Danfoss Series 20 Bi Metal Bearing Plates
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    Sundstrand Sauer Danfoss Series 20 Bi Metal Bearing Plates On picture number 1 you can see smearing all along the surface of the plate. And usually the culprit is there is not enough lubrication. And you can see areas of erosion on the plate also. On picture number 2 you can clearly see erosion going…

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