Lycoming TEO-540-C1A Maintenance Manual page 269

TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
F. Install the cylinder base hold-down nuts (Figures 18 and 32) on the thru-studs and cylinder
hold-down studs.
G. Torque for cylinder base hold-down nuts as follows:
(1) Torque the 1/2 in. nuts to 25 ft.-lb. (34 Nm) in the sequence shown in Figure 32.
(2) Torque the 1/2 in. nuts to 50 ft.-lb. (68 Nm) in the sequence shown in Figure 32.
(3) Torque all 3/8 in. nuts to 25 ft.-lb. (34 Nm) in the sequence shown in Figure 32. The
torque sequence for these nuts is optional.
(4) Use the same sequence shown in Figure 32, complete a torque check to 50 ft.-lb. (68 Nm)
for all 1/2-in. nuts on the cylinder base studs.
(5) Tighten both ends of the free thru-studs at the same time at the all locations. Make sure
all thru-studs have at least 1-1/2 threads above attaching nuts at both ends.
(6) Make sure all cylinder base hold-down nuts are torqued. Complete a torque check of all
nuts on the cylinder base using the torque wrench to apply the appropriate torque on each
nut for 5 seconds. If the nut does not turn, it is correctly torqued.
(7) Apply torque seal to all cylinder hold-down nuts where the nut contacts the barrel.
CAUTION
H. Shroud Tube Installation
CAUTION
NOTICE: Install the shroud tube oil seals in the crankcase first.
One shroud tube (Figure 18) installs on the exhaust port of the cylinder and another
shroud tube installs on the intake port.
© 2018 Avco Corporation. All Rights Reserved
November 2018
TORQUE THE CYLINDER NUTS IN THE SPECIFIED SEQUENCE IN
FIGURE 32.
Sequence of Tightening Cylinder Base Nuts
MAKE SURE ALL CYLINDER FASTENERS ON THE CRANKCASE
ARE TORQUED CORRECTLY AND NONE ARE LOOSE.
BE SURE THERE IS NO OIL INSIDE THE TAPPET BODIES AND THAT
THE PLUNGER ASSEMBLY AND CYLINDER ASSEMBLY ARE
THOROUGHLY CLEAN AND DRY. WASH ANY LUBRICATING OR
PRESERVATIVE OIL (MINERAL SPIRITS, STODDARD SOLUTION, OR
EQUIVALENT) FROM THESE PARTS, SINCE PLUNGER ASSEMBLIES
MUST BE COMPLETELY DRY FOR THE TAPPET CLEARANCE
CHECK.
Figure 32
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