Lycoming TEO-540-C1A Maintenance Manual page 247

TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
(20) Insert the screwdriver between the
Gage (ST-310) and valve spring on
the opposite side and push the valve
spring toward the dial indicator as
shown in Figure 9.
(21) Relax the screwdriver and record
the reading on the dial indicator.
For the valve guide to be
acceptable, the measurement must
be within the specified limits in the
latest revision of the Service Table
of Limits - SSP-1776.
• If the measurement is greater than the specified limit, either replace the cylinder or
send the cylinder to an authorized vendor who can replace the valve guide.
• If the measurement is less than the specified limit, ream the valve guide per
instructions in the latest revision of Service Instruction No. SI-1425.
(22) Move the piston to near its top end of travel.
(23) Remove the Gage Adapter (ST-310-9) from the valve stem.
(24) Loosen each cap screw in the Gage (ST-310) (Figure 6) in small equal increments to
decrease pressure on the valve spring slowly and equally.
(25) Remove the Gage (ST-310) from the cylinder.
(26) Repeat this exhaust valve and guide inspection for all cylinders.
(27) Record all of the results in the 1000-Hour Inspection Checklist for TEO-540-C1A
engines in Chapter 05-20.
CAUTION
(28) If removed, examine and install acceptable plunger assemblies and hydraulic tappets in
the correct location. Refer to the latest revision of Service Instruction SI-1011 for
plunger assembly inspection guidelines.
(29) Install all of the seals, washers, sleeve, springs, shroud tubes, and push rods (Figure 5)
on the cylinder.
© 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 9
Pushing Valve Stem and Adapter Post
Toward Dial Indicator
72-30
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