Lycoming TEO-540-C1A Maintenance Manual page 198

(3) Clean the recess/crankcase bore (which has the groove for the crankshaft oil seal), use a
clean disposable lint-free cloth and any of the following cleaning solvents to remove oil,
sealant, and debris from the crankcase, especially the crankcase bore:
• Methyl-Ethyl-Ketone (MEK)
• Acetone
(4) Locate and remove the internal spring from the solid-ring crankshaft oil seal to prevent
damage to the spring, seal, and potential injury (Figures 54 and 55).
Figure 54
Locating the Internal Spring
(5) Open the spring:
(a) Find the spring joining ends.
(b) Hold the spring tightly in your left hand so it cannot turn (Figure 56).
(c) Twist the spring and roll your fingers counter-clockwise with your right hand about
five turns to unthread and separate the spring ends.
NOTICE: There are two types of internal springs used in the solid-ring crankshaft oil seal.
One type has a hook on each end; the hooks are joined together. The other type
has threaded ends; one end will be screwed into the other end.
72-20
Page 168
• Napasco SC-200
• M-17
Figure 56
Separating the Spring Threaded Ends
TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
Figure 55
Internal Spring Removed
© 2018 Avco Corporation. All Rights Reserved
• M-114.
November 2018