[AT] Need help with newer compact tractor

[Mike M]

Thanks for the input Cecil, it is a power shuttle, not a true 
hydro-static. I can shuttle between forward and reverse in the same gear 
and range without clutching.

Steve that is the exact fluid I put in the tractor, and it had the 
viscosity of motor oil. I know it's on the bottom of the cost spectrum, 
but my tractor is not exactly high tech. It may be worth it to dump the 
TSC fluid and refill with a good quality brand name fluid. It only calls 
for a fluid change at 100 hrs and then every 1000 after that. Looking at 
the cost of the tractor I probably shouldn't have scrimped on the fluid, 
but the manual gave a list of brands and also said, "or any other fluid 
that meets specs".  I tried to find the Shell Donax, which by the way is 
no longer called Donax, but Spirax. I called Shell and asked for some 
local distributors. They gave me 3 names, and no one even heard of it 
let alone carried it.

The tractor is under warranty and the service guys are great, but they 
are a little stumped on this one, they are not sure why the hydraulic 
oil is getting hot enough to fry the seals, at least in the power 
steering box.

What about a quality oil like Hy-Tran Ultra? pricey, but I believe it is 
good stuff?

Regards,

Mike M


On 5/21/2016 8:06 AM, Cecil Bearden wrote:
> Here is a link to a description of Mobil 424 fluid.
> http://petroleumservicecompany.com/mobilfluid-424/
> Here is another one that indicates it is has the viscosity of 80W gear
> oil
> http://www.matweb.com/search/datasheet.aspx?matguid=34113f143db14c43b8a38babfe7172d8&ckck=1
> It first appears to be just a universal tractor fluid as it converts
> over to Chevron THF 1000.  However, when I read down into the specs on
> the Mobil, it states it meets API GL-4 80W oil for rear ends and it also
> states it is the same as a type A hydraulic fluid.  Type A is the old
> Dexron...  The 80W  viscosity interchanges to a 20W motor oil.
> That site has an interchange for many different oil brands. Shell Donax
> has 3 different types in that Donax listing.
>
> You do not say if this is a power shift hydrostat transmission  if so, I
> would use only the best oil I could find.  The newer pumps are pushed
> for all they are worth to get the pressures out of them.  It could be
> that the oil is not heavy enough and gets hot. However, I would think
> you would notice a drop in performance..
>
>
> Amazon has Mobil 424 fluid for $77 for 5gallons.   My TS110 New Holland
> requires Mystic JT5 which is $75 for 5gal, or I can get the New Holland
> oil for $85 /bucket..   I think it has got to where a good hyd oil is
> expensive...
>
> Cecil in OKla
>
>
>
>
>
> On 5/20/2016 1:11 PM, Mike M wrote:
>> So about a year ago I bought a Mahindra 4035 40 HP diesel tractor. I
>> starts, runs and works fine, but I've had some problems with leaks
>> lately. At the 100 hour mark Mahindra wanted me to change the hydraulic
>> filter, which sits on the side of the rear housing. I talked to the
>> service guy at the dealership and he said I'd lose about 2 gallons of
>> fluid when I did that, even with the one rear tire up on a block. It
>> holds 10 gallons overall, and TSC had their premium universal
>> hydraulic/transmission fluid on sale (which states it meets or exceed
>> Mahindra specs)  for $35 for 5 gallons. For me it seemed like a no
>> brainer to just dump the fluid and replace it rather that trying to
>> guess how much I'd lose.
>>
>> Everything went fine, I had to remove a side cover as well as the filter
>> to get to a screen they wanted to have cleaned on the first service
>> only. After that the tractor performed as it should but after about 50
>> hours I've started to develop leaks in the hydraulic system. They fixed
>> one by a large square diverter valve under the tractor and today they
>> are fixing another leak from the power steering block up by the steering
>> wheel.  I called today and talked to the service guy and he says they
>> are puzzled because the leaking o-rings they are looking at today appear
>> burned, as if exposed to excessive heat. Another concern that I brought
>> up to them is that the loader doesn't seem to have quite the lifting
>> capacity as when it was new.
>>
>> My question is, can fluid cause these type of problems? In the manual
>> they call our for Mahindra fluid, Gulf Universal Tractor Transmission
>> fluid, Mobil 424, Shell Donax and a few others, all of which are nearly
>> impossible to find.  Can a fluid be SO wrong that it would cause
>> problems? Right now they are looking at anything that might be causing a
>> continual "deadheading" situation, but with that little 3 cylinder
>> diesel I think I would notice that.
>>
>> Any and all thoughts greatly appreciated.
>>
>> Regards,
>>
>> Mike M
>>
>>
>>
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