Lycoming TEO-540-C1A Maintenance Manual page 168

(1) Remove each counterweight from the crankshaft. Apply the non-adhesive label to
identify the location and position of the crankshaft for reference on reassembly
NOTICE: Since every counterweight has a matched pair of rollers that must stay with each
counterweight, make another non-adhesive label to identify the roller pair that
goes with each counterweight. Apply the label to the roller pair during removal
to prevent mixing the roller pairs on different counterweights during reassembly.
(2) Remove the two retaining rings (or circlips), two washers, and matched roller pair (Figure
20) from each counterweight. Discard the retaining rings and washers regardless of
condition.
Lug Bushings (Crankshaft Dynamic Counterweight Bushings)
CAUTION
NOTICE: All counterweight bushings on all of the counterweights must be replaced at the
same time.
If a lug bushing (Figure 20) is damaged, replace it per instructions in the latest
revision of Service Instruction No. SI-1142.
(3) Remove the counterweight bushings in the steps below.
Tools to be used include:
• Arbor Press Spindle
• Counterweight Bushing Driver ST-92
• Counterweight Fixture Assembly ST-93
72-20
Page 138
Counterweight, Rollers, Counterweight Bushings, and
COUNTERWEIGHT BUSHINGS MUST ALWAYS BE REPLACED AS
A SET WITH NEW COUNTERWEIGHT BUSHINGS WHENEVER
THESE BUSHINGS ARE REMOVED. DAMAGE OR WEAR ON THE
CRANKSHAFT OR COUNTERWEIGHT BUSHINGS COULD CAUSE
FAILURE OF THE COUNTERWEIGHT AND/OR THE
CRANKSHAFT. REPLACE THE COUNTERWEIGHT ROLLERS
WITH NEW COUNTERWEIGHT ROLLERS WHEN THE
COUNTERWEIGHT BUSHINGS ARE REPLACED.
TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
Figure 20
• Depth Control Spacer ST-93-3
• Depth Control Spacer ST-93-5
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November 2018