Oerlikon S12 Series, Service Manual

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7
Planetary Final Drive Service Manual
Tightening and Torquing Bolts
If an air impact wrench is used to tighten bolts, extreme care should
be taken to ensure the bolts are not tightened beyond their specified
torque. The following steps describe how to tighten and torque bolts
or socket head cap screws in a bolt circle.
1. Tighten (but do not torque) bolt
“A” until snug.
2.
Go to the opposite side of the bolt circle and tighten bolt “B” until
equally snug.
3. Crisscross around the bolt circle and tighten the remaining bolts.
4.
Use a torque wrench to apply the specified torque to bolt “A”.
5. Using the same sequence, crisscross around the bolt circle and
apply an equal torque to the remaining bolts.