D4 #7J fuel injector torque specs??

1941D4DOZERBOY
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3 years 7 months ago #225980 by 1941D4DOZERBOY

D4 #7J fuel injector torque specs?? was created by 1941D4DOZERBOY

can anyone tell me the fuel injector torque specs for the 4 1/4 bore engine 7J D4 ?? also what is the torque procecedure to tighten them down?

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Rome K/G
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3 years 7 months ago - 3 years 7 months ago #225991 by Rome K/G

Replied by Rome K/G on topic D4 #7J fuel injector torque specs??

I would use standard grade five bolt torque, tighten each side evenly. I'm not aware of anywhere Cat speced a torque for those.

Last edit: 3 years 7 months ago by Rome K/G.

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Old Magnet
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3 years 7 months ago #225997 by Old Magnet

Replied by Old Magnet on topic D4 #7J fuel injector torque specs??

I have not seen a torque spec. What info I have states to tighten enough to where there is no leakage. Over tightening can lead to distorting the injector.

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Rome K/G
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3 years 7 months ago - 3 years 7 months ago #225999 by Rome K/G

Replied by Rome K/G on topic D4 #7J fuel injector torque specs??

With the later style fuel nozzle capsules, like on the D311, D315 engines is where you have to be careful not to over tighten, those are hand tightened to the adapter and the nut is torqued to 105 ft lbs.
Like mag mentioned tight enough so there is no leakage.

Last edit: 3 years 7 months ago by Rome K/G.

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D4 #7J fuel injector torque specs??

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