Lycoming TEO-540-C1A Maintenance Manual page 192

Tappet Inspection Checklist for TEO-540-C1A Engine Models (Cont.)
Task
Look for damage to the lifter face.
Examine the interior bore of the tappet
body.
A. Look for wear at the interior
shoulder.
B. Look for a feathered or chipped edge
around the shoulder (Figure 44).
* Refer to the latest revision of Service Instruction No. SI-1011 for part numbers.
♦ If an acceptable superseding tappet part number is installed, replace all tappets with tappets of the
same replaced part number.
CAUTION DO NOT USE A MAGNET TO REMOVE THE PLUNGER BECAUSE THE
CHECK VALVE BALL COULD BECOME MAGNETIZED WHICH WOULD
MAKE THE PLUNGER NOT OPERATE.
Examine the plunger for chipping on the
shoulder (Figure 45).
Figure 45
Chipped Shoulder
72-20
Page 162
If damage is found, discard the
tappet body and replace with a new
tappet body of the same part
number.*♦
If wear, feathering or a chipped edge
is found, replace with a new tappet
body of the same part number.*.
Comparison Between Worn and New Tappet Body
If chipping is found, discard the
plunger and replace with a new
plunger.*
TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
Corrective Action
Figure 44
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Findings
Tappet body
acceptable
Replace
tappet body
November 2018