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Author Topic: John Deere 540b  (Read 2692 times)

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Offline Logger003

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John Deere 540b
« on: May 02, 2015, 11:42:32 AM »
I have a 540b skidder and it suddenly started pushing exaust out the intake was wondering if anyone else has had this problem and how to fix it? It started on my last drag when I was finishing up in the bush last winter and am now just finally getting time to work on it and don't want to change a bunch if parts that it doesn't need

Offline cutter88

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Re: John Deere 540b
« Reply #1 on: May 02, 2015, 04:30:09 PM »
Hmmm the only time iv saw that is when an old Detroit runs backward only thing I could say is check exhaust system for blockage and maybe have a valve set done on it
Romans 10 vs 9 
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Offline Logger003

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Re: John Deere 540b
« Reply #2 on: May 02, 2015, 05:44:34 PM »
It's not as much exhaust as that, but I never thought of the valves leaking. I didn't think the exhaust could leak back to the intake. I just thought with a burnt valve the compression would just be low, or am I missing something

Offline treeslayer2003

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Re: John Deere 540b
« Reply #3 on: May 02, 2015, 06:00:01 PM »
could be the turbo? i have one but never acted like that. curious to know when you find out.

Offline Logger003

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Re: John Deere 540b
« Reply #4 on: May 02, 2015, 06:25:11 PM »
could be the turbo? i have one but never acted like that. curious to know when you find out.
when I get this one figured out I will be sure to let you know, I've never heard of this before, I even talked to a JD mechanic and all he said was bring it in and they would overhaul it but would really hate to spend 10000 for a 500$ fix

Offline treeslayer2003

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Re: John Deere 540b
« Reply #5 on: May 02, 2015, 07:11:10 PM »
i overhauled mine with a JD kit for 1500. did an inframe myself, its not bad long as ya don't need mains.

Offline cutter88

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Re: John Deere 540b
« Reply #6 on: May 02, 2015, 08:05:41 PM »
Very first thing I'd check is valves, then turbo and ya there cheap to do a inframe on I did my 640 for under 4000 and it's. A 6 cylinder
Romans 10 vs 9 
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Offline coxy

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Re: John Deere 540b
« Reply #7 on: May 02, 2015, 08:30:12 PM »
I am no expert but sounds like your  turbo my kitty cat did that with the first one the second one pushed over 2gal oil out the muffler was not a pretty thing

Offline teakwood

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Re: John Deere 540b
« Reply #8 on: May 03, 2015, 10:00:20 AM »
i overhauled mine with a JD kit for 1500. did an inframe myself, its not bad long as ya don't need mains.

I like to do that to my 540A. do you have any step by step instructions and torques (manual wont tell)? i would like to do it myself but i never did a overhaul.
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Re: John Deere 540b
« Reply #9 on: May 03, 2015, 10:08:41 PM »
Well pulled the head off today and the valves look good. I'm going to pick up a new head gasket and put it back together and put a new turbo on hope that fixes it. Pistons and cylinders look good from what I can see

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Re: John Deere 540b
« Reply #10 on: May 04, 2015, 06:32:25 AM »
check the play in the turbo shaft   see if there is any broken or worn impellers  on the turbo 

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Re: John Deere 540b
« Reply #11 on: May 04, 2015, 08:42:54 AM »
Turbo has a little end play, you can just feel it move when you play with the shaft about 1/16 inch I would guess, impeller looks good.

Offline treeslayer2003

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Re: John Deere 540b
« Reply #12 on: May 04, 2015, 04:10:09 PM »
i overhauled mine with a JD kit for 1500. did an inframe myself, its not bad long as ya don't need mains.

I like to do that to my 540A. do you have any step by step instructions and torques (manual wont tell)? i would like to do it myself but i never did a overhaul.
teakwood i think your A is totaly different than our B models. you have the 6 cylinder right? should be able to look up specs online with the engine model number.

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Re: John Deere 540b
« Reply #13 on: May 05, 2015, 11:18:44 PM »
I took the turbo into my JD dealer and the mechanic doesn't think theres anything wrong with it so I don't know what my next move should be. They can't even give me an answer or point me to what else it could be. Here's what is going on and please tell me if I'm wrong or missing something. In order for exhaust to come out the intake on the exhaust stroke either raw diesel or exhaust has to be getting pushed out the intake, which means it would have to be a burnt intake valve( but I ruled that out when I pulled the head off). How would the turbo make the exhaust leak out the intake( I have no problem buying another turbo even if this one doesn't seem bad)

Offline Migal

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Re: John Deere 540b
« Reply #14 on: May 06, 2015, 12:14:29 AM »
I have to ask does the exhaust go thru the intake to keep it warm and could the intake have a crack or blown seal?
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Offline Albertcounty hillbilly

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Re: John Deere 540b
« Reply #15 on: May 06, 2015, 06:44:35 PM »
I would check the exhaust lobe on the cam,maybe the exhaust valve not opening.

Offline treeslayer2003

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Re: John Deere 540b
« Reply #16 on: May 06, 2015, 10:02:36 PM »
I took the turbo into my JD dealer and the mechanic doesn't think theres anything wrong with it so I don't know what my next move should be. They can't even give me an answer or point me to what else it could be. Here's what is going on and please tell me if I'm wrong or missing something. In order for exhaust to come out the intake on the exhaust stroke either raw diesel or exhaust has to be getting pushed out the intake, which means it would have to be a burnt intake valve( but I ruled that out when I pulled the head off). How would the turbo make the exhaust leak out the intake( I have no problem buying another turbo even if this one doesn't seem bad)
good point.......hmmm.......we need a head scratching smiley

Offline sandhills

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Re: John Deere 540b
« Reply #17 on: May 06, 2015, 10:30:27 PM »
I would check the exhaust lobe on the cam,maybe the exhaust valve not opening.
I'd say he has it nailed, bad cam.  Not hard to check for, but not fun to fix  :-\.  Only reason I know this is we have a 4010 JD that did the exact same thing, does it make a "thumping" sound through the air breather?

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Re: John Deere 540b
« Reply #18 on: May 06, 2015, 11:31:43 PM »
I would check the exhaust lobe on the cam,maybe the exhaust valve not opening.
I'd say he has it nailed, bad cam.  Not hard to check for, but not fun to fix  :-\.  Only reason I know this is we have a 4010 JD that did the exact same thing, does it make a "thumping" sound through the air breather?
This is starting to make sense at least now I have another thing I check will let everyone know what I find out

Offline coxy

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Re: John Deere 540b
« Reply #19 on: May 07, 2015, 06:43:49 AM »
the bearing went out on my turbo letting the impellers get chewed/ground off just a little  letting exhaust pass back through to the intake   this is how it was told to me  ??? ;D   if your shaft bearings and impellers are good scrap that idea  :D


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