Table of Contents
Advertisement
YO-233-B2A Engine Maintenance Manual
TEO-540-A1A Engine Maintenance Manual
K. Keep the sleeves and arbors in place.
L. Put the parallel blocks (Figure 31) of the Connecting Rod Parallelism and Squareness Gage
on the surface plate.
M. Put the ends of the arbors on the parallel blocks.
N. For the squareness check, use a feeler gage to measure the clearance at the four check points
where the arbors rest on the parallel blocks (Figure 31). Record the measurement in the
Connecting Rod Inspection Checklist for YO-233-B2A Engines earlier in this chapter
O. Compare the clearance between each arbor and the parallel blocks against the values in the
latest revision of the Service Table of Limits - SSP-1776. If out of tolerance, replace the
connecting rod and examine the crankshaft to make sure the crankshaft is not damaged.
15. Connecting Rod Installation
NOTICE: Each connecting rod is identified by a letter (A, E, S, etc.) as a designation for weight
class. All of the connecting rods installed on the crankshaft must be of the same weight
class, except "S" weight rods (service rods) can be used with either "A" or "E" weight
rods depending on parts availability.
A. Ensure that all of the connecting rods have the same weight class letter.
B. Apply specified lubricant to the connecting rod and bearing inserts per the latest revision of
Service Instruction No. SI-1059 where shown in Figure 32. Different lubricants are used on
the various areas on the connecting rod and bearing surfaces.
NOTICE: Anytime either the connecting rod bolt and/or nut pairs are removed from a
Lycoming engine, replace both the bolt and nut pairs with new "Service Use Only"
hardware regardless of apparent condition.
C. Refer to theYO-233-B2A Illustrated Parts Catalog to identify the correct P/Ns for the new
connecting rods bolts.
D. Make sure the new connecting rod bolt and new nut pairs are clean, free of dirt and debris
and that the threads are not damaged.
© 2021 Avco Corporation. All Rights Reserved
February 2021
Figure 32
Connecting Rod Assembly Lubrication
72-30
Page 129
Advertisement
Table of Contents
