Connecting Rod Parallelism / Squareness Check - Lycoming TEO-540-C1A Maintenance Manual

TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
14. Connecting Rod - Parallelism / Squareness Check
NOTICE: The Connecting Rod Parallelism and Squareness Gage P/N 64530 (Figure 36) is
necessary for this check.
Connecting Rod Parallelism and Squareness Gage P/N 64530
A. Make sure that the bearing cap is assembled correctly and is tightened securely.
B. Insert the tapered sleeves (Figure 37) of the Connecting
Rod Parallelism and Squareness Gage P/N 64530 in the
bearing holes in the connecting rod.
C. Pull the arbors through the sleeves.
D. Install the gage arm on the arbor as shown in Figure 37.
E. Turn the adjusting screw on the gage arm until it just
touches the arbor.
F. Use the wing nut to lock the adjusting screw.
G. Make sure the adjusting screw just touches the arbor.
H. Remove the gage arm and install it on the other end of
the arbor.
I. Measure the distance between arbors. For exact
parallelism or alignment, the distances measured on both
sides must be the same. Record the parallelism
measurement in the Connecting Rod Inspection Checklist
for TEO-540-C1A Engines earlier in this chapter.
J. Remove the gage arm.
K. Keep the sleeves and arbors in place.
L. Put the parallel blocks (Figure 38) of the Connecting Rod
Parallelism and Squareness Gage on the surface plate.
M. Put the ends of the arbors on the parallel blocks.
© 2018 Avco Corporation. All Rights Reserved
November 2018
Figure 36
Parallelism Check of Connecting Rods
Squareness Check of Connecting Rods
Figure 37
Figure 38
72-20
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