LYCOMING OPERATOR’S MANUAL SECTION 5
O-320 SERIES MAINTENANCE PROCEDURES
Figure 5-3. Location of Shims Between Cylinder Barrel and
Hold-Down Plates (where applicable) and Sequence of Tightening
Cylinder Base Hold-Down Nuts
(c) Tighten the ⅜ inch hold-down nuts to 300 in.-lbs. (25 ft.-lbs.) torque. Sequence of tightening
is optional.
(d) As a final check, hold the torque wrench on each nut for about five seconds. If the nut does
not turn, it may be presumed to be tightened to correct torque.
CAUTION
AFTER ALL CYLINDER BASE NUTS HAVE BEEN TIGHTENED, REMOVE ANY NICKS IN
THE CYLINDER FINS BY FILING OR BURRING.
5-9
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