Susan Richardson, Author at Hydrostatic Pump Repair

Sundstrand Sauer Danfoss Series 40 Control Options
June 14, 2017 Comments Off on Sundstrand Sauer Danfoss Series 40 Control Options

Sundstrand Sauer Danfoss Series 40 Control Options On the M25, M35 and M44 pumps, they are controlled by a direct displacement controller. On the M46 pumps, they have a control system with a choice of different controls that give you smoothness, stepless and positive control in either direction. Manual Displacement Hydraulic Displacement Electrical Displacement And…
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Sundstrand Sauer Danfoss Series 40 DDC Controls
June 13, 2017 Comments Off on Sundstrand Sauer Danfoss Series 40 DDC Controls

Sundstrand Sauer Danfoss Series 40 DDC Controls The direct displacement control is on either side of a series 40 M25, M35 or M44 pumps. It just gives it a nice even control. When the control shaft moves it causes movement in the swashplate, making the pumps displacement go in one direction then making it go…
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Sundstrand Sauer Danfoss Series 40 NSS
June 12, 2017 Comments Off on Sundstrand Sauer Danfoss Series 40 NSS

Sundstrand Sauer Danfoss Series 40 NSS NSS – neutral start switch Sauer put this switch in so that when the pump starts up, it has to be in the neutral position in order to work. It is a safety feature to prevent the pump from starting up. This switch is wired into series with the…
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John Deere 655B/755B Crawler System Relief Valve & Circuit Relief Valve
June 9, 2017 Comments Off on John Deere 655B/755B Crawler System Relief Valve & Circuit Relief Valve

John Deere 655B Crawler System Relief Valve & Circuit Relief Valve The System Relief Valve S/N 733243,761834 John Deere 755B Crawler System Relief Valve & Circuit Relief Valve S/N 733243, 761920 The system relief valve is marked “V” groove around end of cap. If you incorrectly install relief valve pressure settings, it could damage the…
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John Deere 755B Transmission Control Valve
June 8, 2017 Comments Off on John Deere 755B Transmission Control Valve

John Deere 755B Transmission Control Valve The 755B and 655B are very close in the way the control valve works. You will need to drain the reservoir or hook up a vacuum pump to hold oil in there. Then disconnect the linkage (B-F). Take out the cap screws and washers (A). Slide control valve toward…
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Sundstrand Sauer Danfoss Series 40 38 Degree MDC Bracket
June 7, 2017 Comments Off on Sundstrand Sauer Danfoss Series 40 38 Degree MDC Bracket

Sundstrand Sauer Danfoss Series 40 38 Degree MDC Bracket They have improved this bracket by making it stronger. The neutral return bracket by putting more material into the control neutral adjust spot of the neutral return bracket to make it stronger so that it want fail if the limit stops go higher than normal. The…
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Sundstrand Sauer Danfoss Series 40 Neutral Start Switch
June 2, 2017 Comments Off on Sundstrand Sauer Danfoss Series 40 Neutral Start Switch

Sundstrand Sauer Danfoss Series 40 Neutral Start Switch This upgrade of improvements is for the M46 variable and tandem pumps. The improvement was to decrease the control binding, which would create a possibility that it want go in neutral. The NSS cover, cover gasket and mounting table are affected by this improvement. The cover and…
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Sundstrand Sauer Danfoss Series 40 – Part Identification
May 30, 2017 Comments Off on Sundstrand Sauer Danfoss Series 40 – Part Identification

Sundstrand Sauer Danfoss Series 40 – Part Identification These are listed for M46 single pump and tandem displacement pump older style versus the new style of parts for which housings. Some older parts will not fit the newer models they have out or vice versa. The parts we will be looking at are the housing,…
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John Deere 755B Crawler Specs
May 26, 2017 Comments Off on John Deere 755B Crawler Specs

John Deere 755B Crawler Specs In this chart and diagram and chart shows the specifications for the crawler. Giving you information Tracks Engine Transmission Brakes and steering Hydraulic system and so much more If you need more info on this crawler, we would be glad to assist you. If you are needing parts or repair…
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John Deere Hydraulic Oil Chart
May 24, 2017 Comments Off on John Deere Hydraulic Oil Chart

At our Hydrostatic Pump Repair Site, we offer many types of Hydrostatic Transmission Repair and information relating to Hydrostatic Parts Today we will discuss; John Deere 755B Crawler – Hydraulic Oil The conditions surrounding the air temperature range between the oil changes, use oil viscosity on the temperature chart provide here. John Deere recommends Hy…
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