Service parts topic 00t1 7 describes new grade 12 9 main bearing capscrews part number 3411337 and the higher installation torque released for the n14 engine to address main bearing cap fretting.
Rod and main bearings for n14 cummins.
This aftermarket part is guaranteed to meet oem specifications and covered by a 12 month warranty.
Engines built prior to esn 11875596 have grade 8 main bearing capscrews part number 208346.
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When replacing the main bearings and road bearing in a n14 cummins in frame which is the correct procedure for removing the main and rod bearings.
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Page 2 foreword this manual contains complete rebuild specifications and information for the n14 model engines and all asso ciated components manufactured by cummins engine company inc.
Cummins n14 main bearing bolt torque step 1 120 nm 90 lb ft step 2 230 nm 170 lb ft step 3 346 nm 255 lb ft step 4 loosen all.
Suppliers can be contacted directly for any information not covered in this manual.
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Connecting rod bearing for cummins n14 engines.
Main bearing set cummins n14 3801260 a set of main bearings and thrust washers for cummins n14 engines 2 year warranty.
The following is a summary of the changes.
Step 5 120 nm 90 lb ft step 6 230 nm 170 lb ft step 7 346 nm 255 lb ft.