I scoured the web, found a couple of slightly related threads regarding Massey-Ferguson, even asked a question in an old MF thread, but no reply.
One of the difficulties in searching for this is that most threads are generically titled: "Hydro Filter" without any reference to year, make or model. There are hundreds of such hits and most are totally unrelated. This makes the searching very long, extremely tedious and in the end, useless.
I took the time and found no direct hits.
I am titling this thread differently so that if a source is found, this thread might serve as a properly searchable thread. If anyone has suggestions about improving the titling or topic tags, please say so before editing expires for this first post.
I have found no Sears threads directly about this topic or with an answer to the question: Is there a replacement hydro trans filter that fits a 1968 to 1970 (and related years) Sears Super Hydro-Trac 12?
The below is the info I've gathered along with some questions:
First up: Recurring web info occurring extremely often is that these old Sears hydros "never" need filters. I thought: "That's great! No need for it." Unfortunately, during my extensive digging, I found a few references saying that when enthusiasts removed the hydro pan, the filter literally fell apart. Usually, if the filter falls apart, it is the bottom sheet metal portion that falls right off the filter cartridge. This means that those filters were almost certainly passing particulate matter for a long time. In other words, the filter wasn't filtering the hydro fluid. It had failed.
But let's set aside whether the filters last forever or not. This thread is not about that. This thread is to learn if there is a replacement filter that will fit or not.
The Sears diagrams show the original part number as 9341H and naturally, it is NLA. I've searched extensively and cannot find a direct cross-reference to this part number. If anyone has a filter they are confident will cross from Wix or Hastings or Purolator or NAPA, etc, I sure hope you'll go ahead and post it here.
Next up - a possibility from the MF threads:
I've read in 2 separate places that the Massey-Ferguson MF12H has an identical hydro transmission to the Sears 12 tractors - but they never say what years. In a 3rd place, one guy argues that the MF12H hydro trans is NOT identical to the Sears hydro 12's at all. He claims that the MF12H hydro is the same as the Sears 18's which he claims uses a different hydro drive than the 12's. I can't verify any of this.
Does anyone know if the MF12H hydro trans is identical to the Sears Super 12 hydro trans and if so, what years? Because the MF12H (again, years never stated) has a hydro trans filter that supposedly cross-references to the New Holland JAC545440 and while these are no longer made and have become scarce, I have found 3 of those in stock. At $31 plus $17 shipping from Partspring dot com, I would prefer to make certain it will work before shelling out that kind of cash.
In one thread I can't find anymore, someone said some of the older years of Cub Cadet's with hydros had an identical hydro trans to the Sears SS12 hydro - however, they also did not say what years. Does anyone know if that is true and if so the years? Additionally, if it is true, is there a cross-referenced filter that will fit the Cub Cadets's that might, by deduction, fit the older Sears?
In conclusion, why?:
I began this search only hoping to put a filter on the shelf for 'someday'. However, having learned that it is not unusual at all to have the filter fall apart upon removal, I now believe it may be more urgent than that.
That the filters may fail is not intended as a dig at Sears or the hydrostatic drive manufacturer in any way. To the contrary, for a cartridge type filter to last 4 decades and more of high temperatures, high flow, high vibration, rough and bumpy abuse is downright amazing to me.
Thank you for your time,
Edited by MountainMichael, December 05, 2014 - 08:35 PM.