Lycoming TEO-540-C1A Maintenance Manual page 195

TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
(3) Drill a 1/8 in. diameter hole through the center of the installed alignment dowel.
(4) Fill the new drilled hole with oil.
(5) Put a piece of 1/8 in. diameter drill rod in the drilled hole.
(6) Use a hammer or mallet to hit the end of the drill rod.
(7) Hydraulic pressure from the oil will push out the alignment dowel from the crankshaft.
(8) Remove and discard the alignment dowel.
(9) Examine the bottom of the alignment dowel hole to make sure that the drill bit did not
make contact with the bottom of the hole. If the drill bit made contact with the bottom of
the hole, send the crankshaft to the factory for evaluation.
(10) Press the replacement alignment dowel into the alignment dowel hole to the required
driven height. Refer to Figure 48 for the alignment dowel part number and the correct
driven height.
B. Crankshaft Trigger Gear Assembly Fit Verification
(1) Start with a clean crankshaft that passed the "Crankshaft Inspection" in this chapter.
(2) Make sure the mating surfaces of the crankshaft trigger gear assembly and crankshaft
counter-bored end are clean and dry and that there is no debris. Refer to the procedures
"Crankshaft Cleaning," "Crankshaft Counterbore Cleaning," and "Crankshaft Trigger
Gear Assembly Cleaning" in Chapter 05-30 in this manual.
(3) Install the crankshaft trigger gear assembly on the alignment dowel of the crankshaft
counter-bored end as shown in Figure 49. Use a soft mallet as needed to seat the gear in
place.
(4) Make sure the crankshaft trigger gear assembly seats firmly and is perpendicular (not at a
slanted angle) to the crankshaft as shown in Figure 50. If the crankshaft trigger gear
assembly does not seat correctly, remove it, check for the cause, or replace the crankshaft
trigger gear assembly if necessary.
(5) Remove the crankshaft trigger gear assembly and put it in a safe place until it is installed,
after the crankcase is assembled.
Figure 49
Crankshaft Trigger Gear Assembly
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November 2018
Figure 50
Crankshaft Trigger Gear Assembly Position
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