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Agriculture and Farm Equipment

8.3 Cummings turbo locking up at 19 lbs boost pressure

Customer Question
8.3 Cummings turbo locking up at 19 lbs boost pressure
Submitted: 1 year ago.Category: Agriculture and Farm Equipment
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Answered in 1 hour by:
6/15/2016
Mechanic: Wayne, Journeyman replied 1 year ago
Wayne
Wayne, Journeyman
Category: Agriculture and Farm Equipment
Satisfied Customers: 10,330
Experience: 34 + years as a mechanic
Verified

Hi I'm Wayne

I will help you with this

Did you check it for end play

Let me know

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Customer reply replied 1 year ago
No end play but the fins are hitting housing causing the turbines to stop.
Mechanic: Wayne, Journeyman replied 1 year ago

HI Thank you for that

Sorry for the delay

Grand kids stopped in

If you have side play , and hitting housing

it must be replaced , that is your problem

side to side ,up/down should be zero play

your seal is about yo wipe out

I hope this helped you

If this helped you

Please rate my answer 3 or more Stars

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Customer reply replied 1 year ago
The last two turbos lasted ten minutes before they left locked up.
Customer reply replied 1 year ago
They were remanned turbos.
Mechanic: Wayne, Journeyman replied 1 year ago

Thank you for that

I suggest you get the Engine Ser # ***** take to dealer

make sure you are getting correct one

they may look the same , but are not , there may be 3-4 different ones for your engine

and also tell them if you made any changes to the engine

to up grade Hp

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Please rate my answer 3 or more Stars

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Customer reply replied 1 year ago
Then why would the first turbo that was on it for 2000 hours have locked up? And showing same symptoms as the two remanned.
Mechanic: Wayne, Journeyman replied 1 year ago

Hi

Thank you for that

I believe you have the wrong Turbo on it

that is why I mentioned , Engine SER # to get correct one

Did you do any up grades to Hp ??

If this helped you

Please rate my answer 3 or more Stars

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Customer reply replied 1 year ago
Turbo was bought from dealer by serial #.
Customer reply replied 1 year ago
No hp upgrades.
Mechanic: Wayne, Journeyman replied 1 year ago

Thank you for that

This is not adding up

I know for a fact Rebuild Fail a Lot

I have had to Warranty 3-4 on same truck

I suggest you go with a new , not Reman

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Please rate my answer 3 or more Stars

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Customer reply replied 1 year ago
let's back up 8.3 Cummings in a combine, runs great boost maintains 18psi pyro under 700 after it warms up under full load rpms reduced from 2500 to 1790 and pours out black smoke boost drops to 0 instantly. Waste gate disconnected on all three turbos. Every time it drops boost it makes a loud scream for a split second, guessing that's the turbo locking up. This machine has over 7000 total hours and never had a problem before even similar. Before all this happened it's only had 2 turbos its whole life till now?
Customer reply replied 1 year ago
When you first load it up after warmup it will run for 5-10 min then boost drops, after that maybe a minute and black smoke and no boost. But if you pull throttle to an idle and restart it will run just fine for a short bit.
Mechanic: Wayne, Journeyman replied 1 year ago

Morning

Thank you for all that

Fact still remains , if a Turbo is rubbing and loose

it needs to be replaced , before it blows seals, and more problems,

that fact that it is loosing boost can be contributed to that single turbo

I still suggest to replace it , and we can work from here

If this helped you

Please rate my answer 3 or more Stars

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Customer reply replied 1 year ago
Well, turbo was not the problem, thanks.
Mechanic: Wayne, Journeyman replied 1 year ago

Hi Thank you for that

But if you have side and up/down play

and scraping the housing

Please replace it , you are going to have major damage

You don't have to accept , this , but do your self a favor

and replace it

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Wayne
Wayne
Wayne, Journeyman
Category: Agriculture and Farm Equipment
Satisfied Customers: 10,330
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Experience: 34 + years as a mechanic

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