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Re: Help with TSB Cummins ISL
Posted to HD/Fleet Forum on 4/19/2020 3 Replies

Pat,

I don't recall the TSB your referring to ever applying to the midrange engine. The TSB for upgrading to titanium tappets and upgraded lifters only applied to the Heavy duty engines ISX12 and 15. I searched for any TSB's related to the engine and came up... Login to read more.

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