Lycoming IO-320-A1A Operator's Manual page 54

LYCOMING OPERATOR'S MANUAL
IO-320 SERIES
The hydraulic tappets, push rods, rocker arms and valves must be assembled in the same
location from which they were removed.
b. Removal of Valves and Valve Springs from Cylinder –
c. Removal of Piston from Connecting Rod –
d. Removal of Hydraulic Tappet Sockets and Plunger Assemblies –
NEVER USE A MAGNET TO REMOVE HYDRAULIC PLUNGER ASSEMBLIES FROM
THE CRANKCASE. THIS CAN CAUSE THE CHECK BALL TO REMAIN OFF ITS SEAT,
RENDERING THE UNIT INOPERATIVE.
NOTE
CAUTION
MAINTENANCE PROCEDURES
SECTION 5