Lycoming TEO-540-C1A Maintenance Manual page 202

Connecting Rod Nut Installation
F. Counterweight Installation
CAUTION
NOTICE: Refer to the TEO-540-C1A Illustrated Parts Catalog for counterweight bushing
part numbers.
(1) Install new counterweight bushings per instructions in the latest revision of Service
Instruction No. 1143.
(2) Make sure the counterweights of the correct order and part number are to be installed on
the crankshaft. Refer to the latest revision of Service Instruction No. SI-1012.
CAUTION
(3) Measure the outside diameter of each roller to be installed to make sure it is in
compliance with the dimensions in the latest revision of Service Instruction No. SI-1535.
(4) Install the applicable counterweight on the correct crankshaft lobe and configuration as
identified in the applicable parts catalog.
(5) Install the roller pair in the counterweight.
NOTICE: A new circlip pair and a new pair of washers must be installed on each
counterweight during assembly. Refer to the latest revision of Service
Instruction No. SI-1535 to identify the correct P/N for the new circlips.
72-20
Page 172
Figure 61
DURING INSTALLATION, DO NOT MAKE SCORES, SCRATCHES, OR
ETCH MARKINGS OF ANY KIND ON THE CRANKSHAFT,
COUNTERWEIGHTS AND ROLLERS. A MARK IN ANY OF THESE
AREAS CAN CAUSE THE PART TO WEAKEN AND TO FAIL.
DO NOT INSTALL TWO DIFFERENT ROLLERS ON THE SAME
COUNTERWEIGHT. ALL MUST BE MATCHED PAIRS OF
IDENTICAL PARTS.
TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
Connecting Rod Clearance
© 2018 Avco Corporation. All Rights Reserved
Figure 62
November 2018