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  1. #1
    New Member
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    Nov 2004
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    Default Fluid for Montgomery Ward Hydrastatic Drive

    Greetings from a Newbie.

    I need to service a Montgomery Ward Hydrastatic Drive Lawn Tractor and am at a loss as to what fluid to use (ATF, HI-Tran,?)?

    Any Thoughts?

    rnc [img]/forums/images/graemlins/confused.gif[/img]

  2. #2
    Epic Contributor Soundguy's Avatar
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    ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 941D, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC

    Default Re: Fluid for Montgomery Ward Hydrastatic Drive

    Most of the hydro drive lawnmowers I've seen have sealed 'non serviceable' drives. If you can't find documentation or other advice, and resort to guessing..( if it were me.. ) I'd use the hytran type UTF. It is pretty much a 20wt oil with lots of addatives anyway. The ATF may be thinner.. but not much.. it will however be high detergent.

    The UTF covers such a wide range of uses.. power steering, hydro trans in tractors.. wet brakes, hyd's, manual tranny, final drives / gear reduction units.. etc.. ), that it is at least a decent gamble.

    If you find any specific info.. post back. Who makes that machine? MTD toro? etc...

    Soundguy

  3. #3
    Silver Member
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    Aug 2003
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    20 miles outside of Louisville Ky.
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    '53 Golden Jubilee and a NH TC33DA with 14LA loader

    Default Re: Fluid for Montgomery Ward Hydrastatic Drive

    I had an early nineties Craftsman hydro that used 10W30 motor oil in the tranny. As Soundguy stated, newer hydros are sealed units.

  4. #4
    Epic Contributor Soundguy's Avatar
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    ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 941D, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC

    Default Re: Fluid for Montgomery Ward Hydrastatic Drive

    I think manufacturers run the gambit of what to stick in their trannies. We've had some cat heavy equipment from the 70's and 80's that also used motor oil in the tranny.. in this case it was 30w... etc.

    Soundguy

  5. #5

    Join Date
    Mar 2004
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    Glenville NY (Land of High Taxes)
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    BX 23, Wheelhorse 312-8

    Default Re: Fluid for Montgomery Ward Hydrastatic Drive

    The John deere GT225 we have at work uses automotive ATF.

  6. #6
    Gold Member
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    May 2004
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    Near Edmonton, Alberta, Canada
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    John Deere 990 4x4

    Default Re: Fluid for Montgomery Ward Hydrastatic Drive

    I've got an old (70's) Simplicity garden tractor that also uses automotive automatic transmission fluid.

    My new Craftsman is sealed, so who knows about that one ...

  7. #7

    Join Date
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    Glenville NY (Land of High Taxes)
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    BX 23, Wheelhorse 312-8

    Default Re: Fluid for Montgomery Ward Hydrastatic Drive

    I don't know if I like the idea of a sealed unit. Can you check the level? sight glass?? what if it leaks???

    They must expect the fluid to outlast the unit.

  8. #8
    Epic Contributor Soundguy's Avatar
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    ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 941D, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC

    Default Re: Fluid for Montgomery Ward Hydrastatic Drive

    Yep... 'sealed' always makes me wonder what they do about thermal expansion. Is it really sealed and has an air space, and the seals are rated for the expansion pressure? If it were sealed.. I'd guess since the oil can't get contaminated, it may be ok. I've seen some trannies that don't get an oil change till 100k miles.. so I guess a lawnmower tranny can do it on the right oil..A sealed compressor motor comes to mind as well... again.. sealed... however.. is it vented? If vented.. it is going to accumulate moisture, and that is a contaminant.

    Either way.. makes ya wonder... if it was designed 'to fail'

    Soundguy

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