Do Tappets need to be replaced on an ISX 12 2250 fuel pump?
10-29-2022, (Subject: Do Tappets need to be replaced on an ISX 12 2250 fuel pump? ) 
Post: #1
Thumbs Down Do Tappets need to be replaced on an ISX 12 2250 fuel pump?
Wondering if the ISX 12 has the ceramic tappets like the ISX 15’s? If they do can someone please give me all the part numbers for the ISX 12 and also ISX 15 fuel pump update because we have a few of those as well? Thanks.
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10-29-2022, (Subject: Do Tappets need to be replaced on an ISX 12 2250 fuel pump? ) 
Post: #2
RE: Do Tappets need to be replaced on an ISX 12 2250 fuel pump?
Here’s the engine data plate on one of the ISX 12’s


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10-29-2022, (Subject: Do Tappets need to be replaced on an ISX 12 2250 fuel pump? ) 
Post: #3
RE: Do Tappets need to be replaced on an ISX 12 2250 fuel pump?
https://quickserve.cummins.com/info/index.html

The info your seeking, should be here.


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10-30-2022, (Subject: Do Tappets need to be replaced on an ISX 12 2250 fuel pump? ) 
Post: #4
RE: Do Tappets need to be replaced on an ISX 12 2250 fuel pump?
(10-29-2022 )Redland1 Wrote:  Wondering if the ISX 12 has the ceramic tappets like the ISX 15’s?

It's not just the ceramic plungers you have to worry about, the steel ones fail too. They must be replaced every 400K mi. regardless of what they are made out of.


User's Signature: Warranty??? Yeah right, I am the warranty!!!
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 Thanks given by: hhow55 , Redland1
10-30-2022, (Subject: Do Tappets need to be replaced on an ISX 12 2250 fuel pump? ) 
Post: #5
RE: Do Tappets need to be replaced on an ISX 12 2250 fuel pump?
(10-30-2022 )tree98 Wrote:  
(10-29-2022 )Redland1 Wrote:  Wondering if the ISX 12 has the ceramic tappets like the ISX 15’s?

It's not just the ceramic plungers you have to worry about, the steel ones fail too. They must be replaced every 400K mi. regardless of what they are made out of.

Thanks.What’s the equivalent in hours? These trucks get way more hours than miles since they only drive to the jobsite and then run the PTO for a crap load of hours.
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10-30-2022, (Subject: Do Tappets need to be replaced on an ISX 12 2250 fuel pump? ) 
Post: #6
RE: Do Tappets need to be replaced on an ISX 12 2250 fuel pump?
Around 8000


User's Signature: Warranty??? Yeah right, I am the warranty!!!
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 Thanks given by: Redland1
10-31-2022, (Subject: Do Tappets need to be replaced on an ISX 12 2250 fuel pump? ) 
Post: #7
RE: Do Tappets need to be replaced on an ISX 12 2250 fuel pump?
Thats a X12 we dont see much failure in those like we do the isx15
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 Thanks given by: Redland1
10-31-2022, (Subject: Do Tappets need to be replaced on an ISX 12 2250 fuel pump? ) 
Post: #8
RE: Do Tappets need to be replaced on an ISX 12 2250 fuel pump?
(10-31-2022 )Mr Hagg Wrote:  Thats a X12 we dont see much failure in those like we do the isx15

So they don’t need the updated tappets?
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