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Massey Discussion Forums :: Massey Talk :: hi altitude tractors View modes: 
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Posted: 4/3/2013 4:52:03 AM
   

RE:hi altitude tractors

This tractor on e bay is located close to Wes & Debbie Armstrong. Seller will store for up to 90 days. So buyer can pick up when they're there for Massey Days.

Steve

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User avatar
Posted: 4/3/2013 4:55:26 AM
   

RE:hi altitude tractors

My previous post is about the Hi -Alt. 44 on eabay with single front wheel. The one that questionable as to whether or not it is Hi- Alt.

Steve

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User avatar
Posted: 4/3/2013 5:13:00 AM
   

RE:hi altitude tractors

Anyone know what  MHL260G or MHL277G means as opposer to MHA260G


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User avatar
Posted: 4/4/2013 9:23:00 AM
   

RE:hi altitude tractors

Does anyone know the purpose of the extra long axels as in Joe's post?  What were they available on?  I can only find them in a 44 Special parts book.

Tom


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User avatar
Posted: 4/4/2013 2:01:16 PM
   

RE:hi altitude tractors

Can anyone tell me what happens when a high altitude tractor comes down to sea level.

Is there a power increase or drop?  Does the tractor misbehave and need new jets in the carburettor etc etc?

john


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User avatar
Posted: 4/4/2013 4:54:25 PM
   

RE:hi altitude tractors

Tom
long axles were avalable on th 22-30-44-44sp . they wer used in sugar beat and vegetable country for wide or muti row cutivating.  they were also use on tractors that had sugar beat harvesters mounted on them.

the 333/444 had longer axles and housings available.

John

the domed pistons or head   gives the tractor a higher compression ratio to com pensate for the lack of oxygen at Hi Alt,  example a 44 with a ratio of 6:1 vs a Hi
alt. at 6.5:1.   At sea level this give a 1-3 hp advantage

this made atlot of difference then as the octane level was at about 70. today we could run a 8:1 ratio todays gas  (87 oct)



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User avatar
Posted: 4/4/2013 4:55:44 PM
   

RE:hi altitude tractors

Robinsons 444 long axles

Post attachments:
tripple-long-axles.jpg

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User avatar
Posted: 4/8/2013 1:58:40 PM
   

RE:hi altitude tractors

That Hi- Altitude 44 on ebay sold for $975. Is the lucky buyer  MCA member?

Steve

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User avatar
Posted: 4/8/2013 5:38:16 PM
   

RE:hi altitude tractors

At the risk of "jumping posts", thought I might give a short reply to the question posed by John Farnworth in the General Purpose 4 Wheel Drive thread.  Mention was made of three MF 5600 Series tractors going to the south pole.  John F. asked the question if ACGO/MF would need to modify these tractors for the high altitude.   John F. also suggested the response might belong in the High Altitude tractors thread.   SO, here we go.

I have looked at some websites for information on the engine used in the 5600 tractors.  While I didn't find anything specifically stating that it is turbocharged, the fact that it meets T4i emissions indicates it almost certainly is turbocharged.  And, on one of the You Tube videos with the hood up, I think I can see the wastegate control.

Assuming then that it is turbocharged, there is your altitude compensation.  The turbo, up to a point, can compensate for the thinner altitude air by spinning faster to achieve the desired boost levels.  This isn't limitless, of course.  The turbo does have a maximum rotor speed limit, and when it reaches that point, most electronically controlled engines will derate fuelling and power slightly to prevent turbo overspeed.  For most modern engines, that won't happen except at a combination of extreme high load factor and high altitude - a combination not likely to occur on the trip to the south pole.

I suspect they will be well "winterized" for the trip, with low temperature capable engine coolant, and lighter weight synthetic engine oil. 

Any other thoughts or questions about this response, please post away!

    -    JWB





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User avatar
Posted: 4/15/2013 7:55:47 AM
   

RE:hi altitude tractors

Thanks everyone for the hi altitude discussion and photographs of some nice tractors, again a lot of knowledge coming out here and for me the first HA stamped on a styled 25, thanks Graham for the photograph and I wonder how many more there are surviving up in Canada?


Malcolm.


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