Textron Lycoming IO-540 Series Operator's Manual page 99

TEXTRON LYCOMING OPERATOR'S MANUAL
0-540 & 10-540 SERIES
SECTION 5
(4) Space piston ring gaps. Then, using a piston ring compressor,
assemble the cylinder over the piston so that the intake port is at
the bottom of the engine. Push the cylinder all the way on, catching
the ring compressor
as it is pushed off.
NOTE
Before installing cylinder hold-down nuts, lubricate crankcase through stud
threads with any one of the following lubricants, or combinations of lubricants.
1. 90% SAE 50W engine oil and 10% STP.
2. Parker Thread Lube.
3. 60% SAE 30 engine oil and 40% Parker Thread Lube.
(5) Assemble hold-down plates (where applicable) and cylinder base
hold-down nuts and tighten as directed in the following steps.
NOTE
At any time a cylinder is replaced, it is necessary to retorque the thru-studs
on the cylinder on the opposite side of the engine.
(a) (Engines using hold-down plates) - Install shims between
cylinder base hold-down plates and cylinder barrel, as directed
in figure 5-4, and tighten 1/2 inch hold-down nuts to 300 inch lbs.
(25 foot lbs.) torque, using the sequence shown in figure 5-4.
(b) Remove shims, and using the same sequence, tighten the 1/2
inch cylinder base nuts, to 600 in. lbs. (50 foot lbs.) torque.
NOTE
Cylinder assemblies not using hold-down plate are tightened in the same man-
ner as above omitting the shims.
(c) Tighten the 3/8 inch hold-down nuts to 300 inch lbs. (25 foot
lbs.) torque. Sequence
of tightening is optional.
(d) After completing tightening sequence,
recheck final torque
value.
5-15