Lycoming TEO-540-C1A Maintenance Manual page 245

TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
(6) Remove the valve stem cap from the exhaust valve.
(7) Remove and examine the valve stem keys which tend to wear in uniform distinctive
patterns. Replace worn or damaged valve stem keys. If the keys do not need to be
replaced, install them in the same position from where they were removed.
CAUTION
(8) Remove all of the push rods, shroud tubes, hydraulic tappets, plunger assemblies, sleeve,
springs, washers, and seals from the engine cylinder.
(9) Use a cloth dampened with mineral spirits to wipe the oil from the top surface of the
valve spring seat on the exhaust valve (Figure 5).
(10) Loosen the screws identified in Figure 6 to prevent the screws from touching the Gage
Adapter (ST-310-9) when installed on the valve stem.
© 2018 Avco Corporation. All Rights Reserved
November 2018
DO NOT MIX PLUNGER ASSEMBLIES WITH DIFFERENT PART
NUMBERS IN THE SAME ENGINE. DIFFERENT PLUNGERS HAVE
VARYING LEAK DOWN RATES WHICH CAN CAUSE INCORRECT
ENGINE OPERATION.
Figure 5
TEO-540-C1A Engine Valve Components
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