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03 Nov 2009 TM
PO BOX 90, Mobile, AL 36601 251-438-3411 MSB09-8
©2009, TELEDYNE CONTINENTAL MOTORS, INC.
ISSUE DATE REVISION DATE PAGE NO REVISION
17 of 20
03 Nov 2009 TM
PO BOX 90, Mobile, AL 36601 251-438-3411 MSB09-8
©2009, TELEDYNE CONTINENTAL MOTORS, INC.
B.2. Hydraulic Lifter Installation
Procedure
1. Liberally lubricate all replacement lifter faces using Molykote, Dow Corning® G-N
Paste, or equivalent. Lubricate the lifter bodies with clean 50-weight aviation engine
oil.
NOTE: Forward refers to the crankshaft end of the engine; aft
refers to the accessory end of the engine.
2. Install any unaffected hydraulic lifters in the bores from which they were removed.
Install replacement hydraulic lifters to replace those affected by this bulletin.
3. Install hydraulic exhaust lifters into the aft lifter bores in cylinders on the 1-3-5 side
of the crankcase and in the forward lifter bores for cylinders on the 2-4-6 side of the
crankcase.
4. Install hydraulic intake lifters into the forward lifter bores in cylinders on the 1-3-5
side of the crankcase and in the aft lifter bores for cylinders on the 2-4-6 side of the
crankcase.
5. Using a Pushrod Spring Compressor (or equivalent), compress the pushrod housing
spring.
6. Place a new packing between the two steel washers, and install on the crankcase end
of the pushrod housing.
7. Position the pushrod housings into respective ports on the crankcase.
8. While the spring is compressed and the housing is installed in the crankcase, slide a
new packing (O-Ring for Crossflow cylinders), sandwiched between the two steel
washers on the cylinder end of the pushrod housing.
9. Guide the cylinder end of the pushrod housing into the cylinder head bore while
releasing the pushrod spring tension with the Pushrod Spring Compressor Tool.
10. Remove the Pushrod Spring Compressor Tool from the pushrod and verify the
packing and washers are properly positioned.
11. Lubricate the pushrods with clean 50-weight aviation engine oil and install the
pushrods through the cylinder openings into the pushrod housings.
12. Before installing the rocker arms on each cylinder, position the crankshaft so the
pushrods are at their lowest position in the pushrod tube, the piston is at top dead
center and both the intake and exhaust lobes on the camshaft are facing away from
the rocker arms.
13. With the piston at top dead center of the compression stroke, bleed down the lifter by
applying a constant pressure on the pushrod end of the rocker arm.
NOTE: Instructions vary slightly for updraft and crossflow
cylinder designs. For crossflow cylinders, proceed to step 15,
updraft cylinders continue with the next step.
14. Updraft Cylinder Rocker Shaft Installation:
a. Lubricate the rocker shafts with clean 50-weight aviation engine oil. Install the
rocker arms with one thrust washer on each side of the rocker shaft and center the
rocker shaft in the boss. Insert the rocker shafts (non-chamfered end first) in the
rocker shaft boss, rotate the rocker shaft in the bore to position the chamfer
closest to the cylinder.
b. Check rocker arm side clearance between the boss and rocker arms with a feeler
gauge; side clearance must be 0.002 - 0.015 inches. If side clearance exceeds the
allowable amount, replace the thrust washers with a thicker (oversize) thrust
washer to reduce side clearance to the correct tolerance.
Figure 9. Updraft Cylinder Rocker Arm Side Clearance
c. Install rocker shaft bolts, lock washer and flat washer; torque the bolt to 90-100
inch pounds.
d. Measure the dry valve lash at valve tip-to-rocker foot by applying pressure on the
rocker arm at the ball (pushrod) end. Insert a feeler gauge between the rocker arm
foot and valve tip; allowable limits are 0.060 (min) to 0.200 (max). Replace the
pushrods with authorized over size pushrods (P030) if the dry valve lash exceeds
the maximum limit.
NOTE: For updraft cylinders, proceed to step 16, crossflow
cylinders continue with the next step.
15. Crossflow Cylinder Rocker Shaft Installation:
a. Lubricate the rocker shafts with clean 50-weight aviation engine oil and insert the
rocker shafts in the rocker arms. Place a new thrust washer on each side of the
rocker arm and center the rocker arm and thrust washers on the shaft.
b. Align the rocker shaft screw holes with the rocker boss; install the screws (nuts on
240/360 engines) with new tab washers and retainers. Torque the screws for all
470, 520 and 550 series engines 190-210 inch pounds. Torque the nuts on
240/360 series engines 110-120 inch pounds.
ISSUE DATE REVISION DATE PAGE NO REVISION
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Cirrus Design SR20西锐20飞行员操作手册和飞机飞行手册附录(120)
