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Massey Harris & Massey Ferguson Tractors Discussion Forum
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high altitude 555???

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russ schultz

10-18-2012 22:30:13

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i found in the bush to what i seem to believe is a massey harris 555 diesel high altitude. whats the difference between a regular 555 diesel? anyone know how many produced? can anyone confirm it is actually a high altitude? serial number - D1SFA 20722

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Russell Schultz

10-19-2012 09:14:49

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 Re: high altitude 555??? in reply to russ schultz, 10-18-2012 22:30:13  
So seeming how I have a 1 for regular altitude and also an A for high altitude, what do I have?

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earnest T

10-19-2012 09:39:55

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 Re: high altitude 555??? in reply to Russell Schultz, 10-19-2012 09:14:49  
According to my 555 book, 1 is 1000 ft elevation while 5 is 5000 ft elevation. Now, there could be a letter A or P after the serial number which means it has an APE Pump or PSB Pump - which do you have?

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Russell Schultz

10-19-2012 10:50:00

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 Re: high altitude 555??? in reply to earnest T, 10-19-2012 09:39:55  
Makes sense Ernie. It has and inline pump which I believe is an APE

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10-19-2012 03:39:14

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 Re: high altitude 555??? in reply to russ schultz, 10-18-2012 22:30:13  
D stands for diesel
1 for regular altitude
S for standard
F for foot clutch
A high altitude
Biggest difference between high & regular altitude is engine compression. High has higher compression. And you have a 1956 according to the seriaal#

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