Hydrostatic Pump Repair

Sundstrand Sauer Danfoss Series 40 M46 Cartridge Motor – Improved Seal Retention
April 26, 2017 Comments Off on Sundstrand Sauer Danfoss Series 40 M46 Cartridge Motor – Improved Seal Retention

Sundstrand Sauer Danfoss Series 40 M46 Cartridge Motor – Improved Seal Retention By adding a flat washer to the front of the input shaft lip seal it enhances the seal retention. The snap ring groove is moved to give enough space for the washer. But it becomes non interchangeable with other parts, once the change…
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Sundstrand Sauer Danfoss Assembly Procedures for Variable Displacement Pump Series 40 M46 – Part 1
April 24, 2017 Comments Off on Sundstrand Sauer Danfoss Assembly Procedures for Variable Displacement Pump Series 40 M46 – Part 1

At our Hydrostatic Pump Repair Site, we offer many types of Hydrostatic Transmission Repair and information relating to Hydrostatic Parts Today we will discuss: Assembly Procedures for Variable Displacement Pump Series 40 M46 – Part 1 Always clean and oil parts before you assemble the pump. Make sure you torque oil threaded parts to levels…
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Sundstrand Sauer Danfoss Series 40 M46 EDC & HDC O Ring Change
April 21, 2017 Comments Off on Sundstrand Sauer Danfoss Series 40 M46 EDC & HDC O Ring Change

Sundstrand Sauer Danfoss Series 40 M46 EDC & HDC O Ring Change They have reconfigured the control housing to take an oring that is stiffer that has a larger cross section. It will require a deeper groove to be made into the housing. So it will not have to have two orings anymore. The EDCs…
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Sundstrand Sauer Danfoss Series 40 Adding an Orifice
April 19, 2017 Comments Off on Sundstrand Sauer Danfoss Series 40 Adding an Orifice

Sundstrand Sauer Danfoss Series 40 Adding an Orifice to the Loop Flush Drain It is a change in the variable motor housing that will let the amount of the loop flushing flow to be controlled. The housing has to be tapped to take in an orifice in the loop flushing drain passage within the housing….
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Shaft, Motor & Gears of a Power Transmission
April 18, 2017 Comments Off on Shaft, Motor & Gears of a Power Transmission

Motor, Shaft and Gears of a Power Transmission The motor shaft and gears in this diagram show how the horsepower is derived. One see of gears and shaft will have to transmit power to move the tool slide. The machine spindle is a shaft where the chuck is mounted onto. Then it is driven by…
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Sundstrand Sauer Danfoss Series 40 MMF035D/MMV035D Shaft Bearing
April 18, 2017 Comments Off on Sundstrand Sauer Danfoss Series 40 MMF035D/MMV035D Shaft Bearing

Sundstrand Sauer Danfoss Series 40 MMF035D/MMV035D Shaft Bearing The reason for the change on the M35 and M44 units, is to give an option on the shaft bearing. It can be equipped with a high capacity part that will allow it to take on high thrust loads. Giving the motor a better performance. The new…
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Sundstrand Sauer Danfoss Series 20 Good & Bad Shafts
April 17, 2017 Comments Off on Sundstrand Sauer Danfoss Series 20 Good & Bad Shafts

Sundstrand Sauer Danfoss Series 20 Good & Bad Shafts As you can see in diagram number one this shaft has worn splines. It can be caused by not fitting it in correctly or not aligning it up right with the mating coupling. As for diagram number two of this input taper shaft it is great…
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Sundstrand Sauer Danfoss Series 15 Charge Relief Valve
April 13, 2017 Comments Off on Sundstrand Sauer Danfoss Series 15 Charge Relief Valve

Sundstrand Sauer Danfoss Series 15 Charge Relief Valve Here are the procedures for replacing the valve. Take out the plug (23) then skim the spring (26) and poppet (27) out of the housing. Don’t do anything to the shims (25) or swap any parts with any other valve. Look over the poppet and seat in…
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Sundstrand Sauer Danfoss Series 40PV Pump Filtration, MDC & Displacement Limiters
April 12, 2017 Comments Off on Sundstrand Sauer Danfoss Series 40PV Pump Filtration, MDC & Displacement Limiters

Sundstrand Sauer Danfoss Series 40PV Pump Filtration, MDC & Displacement Limiters In this diagram and chart it discusses the MDC Pump filtration Charge Pump options Front View Suction Filtration Side View Front View Bottom View Displacement Limiters Chart All the ports are SAE straight thread Oring ports per SAE Shaft rotation is figured out by…
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Sundstrand Sauer Danfoss Series 20 How To Tell Bad Valve Plates
April 10, 2017 Comments Off on Sundstrand Sauer Danfoss Series 20 How To Tell Bad Valve Plates

Sundstrand Sauer Danfoss Series 20 How To Tell Bad Valve Plates In diagram #1 you can see there is contamination on the under side of the valve plate. It can cause damage in that can make the plate lift up. This will cause massive leakage and cause damage to the bearing plate also. In diagram…
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