Oil Cooler Bypass Valve Removal - Lycoming TEO-540-C1A Maintenance Manual

9. Oil Pressure Relief Valve Installation
A. Install a new gasket on the oil pressure relief valve (Figure 5).
NOTICE: Refer to the Special Torque Requirements Tables in Section V in the latest revision
of Service Table of Limits - SSP-1776 to select the correct spring.
B. Install the spring in the oil pressure relief valve (Figure 5).
C. Apply Copper-Based Anti-Seize to the threads of the oil pressure relief valve as shown in
Figure 6.
D. Install the ball in the crankcase.
E. Install the oil pressure relief valve (with the spring) in the crankcase and torque to 300 in.-lb.
(34 Nm).
F. Safety wire/cable the oil pressure relief valve as shown in Figure 4. Refer to the latest
revision of Service Instruction No. SI-1566.

10. Oil Cooler Bypass Valve Removal

A. Remove and discard the safety wire/cable from the oil cooler bypass valve.
B. Remove the oil cooler bypass valve (Figure 7) from the oil accessory housing. Discard the
gasket.
11. Oil Cooler Bypass Valve Cleaning
Clean the oil cooler bypass valve per instructions in the table in Chapter 05-30.
12. Oil Cooler Bypass Valve Installation
Apply Food Grade Anti-Seize on the threads of the oil cooler bypass valve.
A.
Install the oil cooler bypass valve with a new gasket in the accessory housing as shown in
B.
Figure 7.
Torque the oil cooler bypass valve to 300 in.-lbs. (34 Nm).
C.
Safety wire/cable the oil cooler bypass valve. Refer to the latest revision of Service
D.
Instruction No. SI-1566.
72-50
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TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
Figure 7
Oil Cooler Bypass Valve
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November 2018