AC7000 with lots of blowby

NIGHTFARMER · Nov 5, 2009

I have a AC7000 that has lots of blowby. When round baling with it, it looks almost like the field is on fire. So bad, some of my neighbors have named it "Ol Smokey". However, it still starts good and runs good. Just wondering how I can tell if it is from around the pistons or from the valves? Any chance something like oversize rings would fix it? Any help is greatly appreciated.

rrlund · Nov 5, 2009

How fast did it come on? My White 2-135 started blowing out the blowby pipe like crazy while I was chopping corn in 08. When I tore it down,a ring had broken and wore through the groove til it pretty much took the whole side out of a piston. Had to put sleeves and all in. In a tractor the size of that 7000,I don't believe I'd mess with just rings unless everything,including the ring grooves in the pistons,was in GREAT shape.

Brian Jasper co. Ia · Nov 5, 2009

Worn valves don't cause blowby, worn pistons and rings do.

ben brown · Nov 5, 2009

most likely you have bad rings its best to replace the sleeves with piston and rings and have the head done, but one thing to check first is remove the air tube coming from tubro and make sure its not leaking oil in to intake i seen that happen a few times

NIGHTFARMER · Nov 10, 2009

It has gotten worse gradually. It sounds like its probably wore bad and needs overhaul. Thanks for the replies.

AC7000 with lots of blowby

NIGHTFARMER

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rrlund

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Brian Jasper co. Ia

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ben brown

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NIGHTFARMER

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