EXTENSION GP-EXHAUST 3112236 - Caterpillar

Procedure For Engines With Spacer Plates
1. Put clean oil on the bolt threads.2. Tighten bolts 1 through 20 in sequence to 307 14 N m (230 10 lb ft). See Illustration 1.3. Again, tighten bolts 1 through 20 in sequence to 470 14 N m (350 10 lb ft).4. Tighten bolts 21 through 25 in sequence to 100 14 N m (75 10 lb ft).5. Again, tighten (hand torque only) bolts 1 through 20 in sequence to 470 14 N m (350 10 lb ft).6. Again, tighten bolts 21 through 25 in sequence to 100 14 N m (75 10 lb ft).
Illustration 1. Sequence to tighten bolts on engines with spacer plates.Procedure For Engines Without Spacer Plates
1. Put clean oil on the stud threads.2. Tighten the nuts in sequence of 1 through 20 to 307 14 N m (230 10 lb ft). See Illustration 2.
Illustration 2. Sequence to tighten nuts on engines without spacer plates.3. Again, tighten the nuts in the same sequence to 470 14 N m (350 10 lb ft).4. Again, tighten (hand torque only) the nuts in sequence to 470 14 N m (350 10 lb ft).Special Instruction, Form No. SEHS7990 has the new torque and sequences to tighten the nuts or bolts when the new gasket is used. The Special Instruction comes with the new gasket.