Orange Posted November 4, 2003 Posted November 4, 2003 I'm trying to piece back together a Simp. 3310H. I noticed that it was supposed to have a bolt on hydro fluid resevoir and a bolt on hydro fluid cooler/radiator. I currently have a 7016 and it doesn't have the resevoir or cooler. Both rear ends appear to be the same except the 3310H has the shift lever on the back in order to "freewheel". Do I really need have the bolt on resevoir and cooler or not? If I do, let me know if any of you have the parts and would be willing to sell. Thanks.
ambler Posted November 4, 2003 Posted November 4, 2003 3310 is a vickers hydro and 7016 sundstrand. 1975 was the change over
UCD Posted November 4, 2003 Posted November 4, 2003 Yes you do need it. The fluid reservoir also contains the filter Vickers Hydro Sundstrand 15 hydro
Salthart Posted November 4, 2003 Posted November 4, 2003 This is just my thinking here and I'm sure others know better than I do. When the Vickers hydrostat was built, they had one school of thought. Move a little fluid through a machine built to very close specs so there is little waste. But all this tightness builds heat and has to be removed. The fluid for the hydro loses lube quality at around 200 degrees if I remember rightly... the newer idea is to move a lot of fluid and run looser parts. If you build half or less the pressure of a closer tolerance unit, no problem.. The "Pistons" are twice the diameter so you still get power to the ground. You also build less heat and tiny bits of dirt etc don't cause near the panic.. Run the cooler sir.. You may get by without it for a good while. But when time comes and you do need it and don't have it, That will be the last of that pump IMO
Orange Posted November 4, 2003 Author Posted November 4, 2003 UCD, I am a little confused. The 3310H I have was bought basically with the chassis and a stripped down rearend with only the transmission and hydropump. The pump had and still has a hydraulic fluid filter screwed into the port on the left hand side of the pump. It is screwed into the same spot as my AC917. My 7016 has the remote filter location just like your diagram picture. But my AC917 and 3310H have the filter mounted horizontally in the same place. I will post a picture, but it only shows the top half of the pump. I took the photo to show my PTO setup. The filter is just out of view below the pump on the left side of the picture. Do I have a hybrid of some sort. Also, do the terms Sundstrand and Vickers words used to describe the internal structure of the pump or are they manufacturer names. Sorry about the long message. Thanks for teaching me.
UCD Posted November 4, 2003 Posted November 4, 2003 The hydro unit in the picture is a Sundstrand. Sundstrand had an early model with the filter remotely mounted. This is noted in the illustration of the Sundstrand I posted. It is showing the location of the filter in the early models. The late Sundstrand model used a filter mounted on the unit. By the picture you posted it looks like a Sundstrand hydro unit. Some one replaced the Vickers hydro with a Sundstrand hydro. The Sundstrand Hydro was not used until the 7000 series tractor. Sundstrand and Vickers are manufacturer names of the respective units. It looks like the free wheeling latch & bracket is missing on your unit in the picture.
fuzy Posted November 5, 2003 Posted November 5, 2003 Easy way to tell is the vickers units had a cast iron fin housing and I believe the sundstrand always had and aluminum one. John
DaleC Posted November 5, 2003 Posted November 5, 2003 Heat is the great distorier of any fluid drive system. If you can cool it, do so. It will keep you from a lot of problems later.
Orange Posted November 5, 2003 Author Posted November 5, 2003 If I have a Sundstrand model on this 3310H. I also have the 4-6" long lever on the rear right of my axle which allows me to free-wheel. Do I still need the guilotine-like plunger that sits atop the hydro pump (I think its called a fluid bypass lever)? My 7016 has one and its a must to be able to push the tractor around. The 3310 moves just fine when I disengage the rear end with the lever. I'll try to take more accurate pictures and post tonight. Thanks again for your help.
fuzy Posted November 5, 2003 Posted November 5, 2003 No you will not need that plunger for the bypass valves. The newer units that used the sundstrand model did not have the trany neutral only the hydro bypass. You've got the best of both worlds. A great pump and an easy to push trany. John
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