4-53 detroit,governor issues

bison · Jul 27, 2009

i got a 453 detroit in my baler tractor. couple days ago it started to behave funky.
as long as the engine stays under load the Rpm,s stay steady but to low(barely 2000 rpm wide open
).as soon as i remove the load(stop the baler to kick the bale out)the Rpm's drift up till 2800/3000 rpm.There dont seem no high idle control left
I checked to top of the governor,but springs and fulcrums apear fine(no sticking or play or broken spring)The fuel rack is not sticky either.

Any idea anyone where the problem might lie.

RodinNS · Jul 27, 2009

Somebody been playing with the buffer screw???

I dunno. I"m not detroit expert, but if it was mine I"d be doing some reading on it right about now...

Rod

Billy Shafer · Jul 27, 2009

The buffer screw is supposed to take the hunting out.

Guido. · Jul 27, 2009

Hello bison,
If nobody adjusted the buffer , you probably have a sticking injector. The buffer screw will make the engine overspeed and not come back to idle , if it is adjusted too far in. The injectors are all connected together as the rack lever pushes them in. If one sticks they all stick. I would take the cover off and see if you can find the one that is sticking.
Do it with the engine off.
If you have a cable for the throttle it maybe that the shaft is sticking. How about the return spring? it could be broken. Need more help repost with what you find.
Good Luck....................Guido.

buickanddeere · Jul 27, 2009

Max adjustment of 20 rpm with the buffer screw according to the 53 series manual.
Could be an internal spring but the sticking injector sounds likely. May as well replace them all, they are dirt cheap. C45's make good power without significant WOT smoke,start easier and idle clean.
Height adjustment is critical or timing will be off.

RodinNS · Jul 27, 2009

Truthfully, I remember ONE thing, and one thing only about Detroit govenors. Never screw with the buffer screw unless you know what you're doing.
This was one subject that our old shop teacher used to try to hammer home...
There was a 6V-71 in the shop. Had been since the school opened. It also ran away once because some wise-as$ decided one day... 'hey, I'm a gonna screw this buffer screw in and see what happens'.
It laid over on it's side before they managed to smash the fuel lines off... It was just an engine set up on a trolley for shop purposes.
That made for one expensive mess before it was all over.

I wouldn't argue the stuck injector theory too much tho. It makes sense, other than he said the rack wasn't sticking...

Rod

Jon Hagen · Jul 27, 2009

You might also remove that little steel cover on the base of the governor where it connects to the weight housing. That little torrington thrust bearing may have failed and will quickly fill the motor with iron chips as it eats up the governor fork and weights

4-53 detroit,governor issues

bison

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RodinNS

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Billy Shafer

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Guido.

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buickanddeere

Well-known Member

RodinNS

Well-known Member

Jon Hagen

Well-known Member

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