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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 & Series 20 Neutral Start Switch ChangeThis service bulletin talks about the change in the neutral start switch change on series 20 & 90 models. They have changed suppliers of the start switch. Especially on the series 20 and some on the series 90 (MR, MS, ML).Service bulletin PIB-9403The new switch has teflon tape on the threads instead of vibra seal. When removing the switch, teflon tape should always be put back...

At our Hydrostatic Pump Repair Site, we offer many types of HydrostaticTransmission Repair and information relating to Hydrostatic PartsToday we will discuss: Sundstrand Sauer Danfoss Series 90 100cc – Integral Filtration Manifold In service bulletin SB – 9436 we will be talking about changing the integral filtration manifold and bulkhead nut to more in catalog form to be able to find it.The old bulkhead nut could be used with the old or new filter manifold. The new one can only be used with the new filter manifold.The old nut will still be available for service parts. The old filter manifold...

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 – Neutral Start Switch Replacement Part 1 Removal and Installation When you need to replace the neutral start switch you will need to by the control on the machine giving a space of 38 in. is needed for switch removal.If you disturb any of the components, the prime mover may start in other positions other than neutral. Holding the switch down with a wrench and loosen the locknut. Try not to let...

At our Hydrostatic Pump Repair Site, we offer many types of HydrostaticTransmission Repair and information relating to Hydrostatic PartsToday we will discuss: Sundstrand Sauer Danfoss Series 90 – Cage Locator PinThis is an improvement for all Series 90,55,75 and 100cc pumps. The 55 & 75 cc pumps will use the same locator pin that is in the 100cc pumps. The new model is 2 mm further down in the housing than the old pin. And of course that means the housings have been bored out to accept the longer pin.If you use the older pin, you must use the older...

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 90 100 CC Pump – Piston Improvement Service Bulletin SB-8823 talks about Piston Improvement. The change is using fabricated (welded) piston assemblies to phasing out the non fabricated (hollow) piston assemblies in the cylinder block (barrel) on the Series 90 pumps & motors. The single welded piston assemblies will be the only parts as service parts. The hollow pistons will no longer be available. You will need to keep the part number for...