Air Cut Off - Super 99 3-71

ezed · Sep 20, 2012

3-71 detroits, as used in a super 99, do not have air cut offs as do 4-53's in the 1900's and 2-53's in the 435 John Deere. I wonder why?? Has anyone found a simple way to install an air cut off on their 3-71? I was told that one off a 6-71 will fit however I am doubtful that oem air cleaner will line up. I worry about a stuck rack. ideas???

OLarry from MD · Sep 20, 2012

The air cut off is supposed to be on there, i have seen them.On a 53 series it is a trip, on a 71 series it's a lever and cable to pull on and off.

ezed · Sep 20, 2012

I see no evidence of one ever being on this tractor. Likewise, of the dozen or so super 99's I have viewed none had an air cut off. Maybe it was an option.

gordey · Sep 20, 2012

3-71 olivers never came with one, if its a good running tractor its not likely to runaway, but a stuck rack is not uncommon if the tractors sat for a long time

duane o. · Sep 20, 2012

positive air shutoffs were not a option on the tractors and were optional on all detroits from small to big. most shutoffs were used in oilfield areas of the country due to the gasses in the air around well sites.this is where to look if you were to find a used one.

mm585 · Sep 21, 2012

I just restored a 1950 MFD it had one, It even had a decal on the dash that said emergency shut off.

60 Fan · Sep 21, 2012

[q

uote="ezed"](reply to post at 16:00:57 09/20/12) [/quote]

Just another FYI, We had them on most older fire trucks with Detroit's. Older Pirsch, etc. Again as another reply has stated there was always the possibility of being in a combustible gas environment that could cause a runaway. Chances are you could find one of these in bigger salvage yards locally.

johncc · Sep 21, 2012

we have 4- olivers with 371 d. nown have shutt offs. no place for them. if starts to run away
shutt air off at air clearner.

OLarry from MD · Sep 21, 2012

Probably a replacement engine.

johns · Sep 21, 2012

I have also been looking into doing this to my 99gm. One idea I"m looking into is some of my Oliver puller buddies have installed air shut-offs on their 1955 and 1850 pullers. Mills Fleet-Farm sells a guilotine that they use for less than $20. I"m wondering if a guy can install it between the blower and the intake that has GM stamped on it. That way the original air cleaners can be used.

ezed · Sep 22, 2012

I see no reason why a cut off between the blower inlet and air cleaners would not work. What is the mills fleet farm cut off designed for??? What do they call it? Part number? I have been unable to find it on their web site

larry duda · Sep 22, 2012

You can modify your injector fuel rack . If an injector sticks the other 2 will return to idle.Larry

Air Cut Off - Super 99 3-71

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