Lycoming TEO-540-C1A Maintenance Manual page 246

(11) Install the Gage (ST-310) on the valve on the cylinder head as shown in Figure 6.
(12) Tighten the cap screws (identified in Figure 6) equally. If the casting touches the lower
cap screw, put the washer under the head.
(13) Measure stem movements by moving the valve stem along the valve guide wear line
(inside diameter of the valve guide, parallel to the centerline of the valve rocker arm).
(14) Install the Gage Adapter (ST-310-9) over the
top of the valve stem (Figure 7). Make sure it
is tight.
NOTICE: If you can move the Gage Adapter
(ST-310-9) on the valve stem with
your hand, it is incorrectly installed.
(15) Push the valve stem and Gage Adapter (ST-
310-9), against the upper spring retainer as
far as they will go.
(16) Put the blade of a screwdriver in the area
between the exhaust valve spring and Gage
(ST-310).
(17) Use the screwdriver to push the
valve and adapter the maximum
distance away from the dial
indicator as shown in Figure 8.
(18) Move the dial indicator toward
the adapter post until the
indicator is preloaded
approximately 0.010 in. (0.254
mm), and lock it in place with
the set screw.
(19) Adjust the dial of the indicator
to read "0" (zero).
72-30
Page 216
Figure 6
Gage ST-310 Installation on the Cylinder Head
TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
Gage Adapter (ST-310-9)
Assembled on Exhaust System
Figure 8
Dial Indicator
© 2018 Avco Corporation. All Rights Reserved
Figure 7
November 2018