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Leak down test tolerance?


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#1 03rev800r

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Posted 25 January 2020 - 05:45 PM

Any one know the percentage of drop is acceptable on a leak down test, Manual says 5PSI for 3 minutes, I’m dropping to 4-1/2 PSI in 3 minutes, sprayed everywhere with soapy water and nothing seems to be visibly leaking, wondering if it’s mag seal or inner seals

#2 TwoRevs

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Posted 25 January 2020 - 06:47 PM

Any one know the percentage of drop is acceptable on a leak down test, Manual says 5PSI for 3 minutes, I’m dropping to 4-1/2 PSI in 3 minutes, sprayed everywhere with soapy water and nothing seems to be visibly leaking, wondering if it’s mag seal or inner seals

I always get obsessed to find where its leaking lol

 

Did you pop the cap off the pto elbow and remove the shields from the y-pipe and check for cracks?

Also make sure the pulse line is crimped off good too.

 

We had a 600ho with 14000 miles fail today in the shop.. inner pto seal.. held pressure perfectly till I popped the elbow cap off then it sounded like someone stabbed a tire (:



#3 grizzley81

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Posted 19 November 2020 - 06:36 AM

looking to do a leak down test on two 600 etec sleds do anyone know what lines I needs to pinch off??



#4 Daag44

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Posted 21 November 2020 - 07:59 PM

looking to do a leak down test on two 600 etec sleds do anyone know what lines I needs to pinch off??

 
The pulse lines that operate the pneumatic exhaust valves.


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