Lycoming YO-233-B2A - Page 155

TEO-540-A1A Engine Maintenance Manual
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February 2021 Page 135
YO-233-B2A Engine Maintenance Manual
D. Apply one or a combination of any of the following lubricants to the outer three threads
(Figure 37A) on all of the crankcase thru-studs and cylinder hold-down studs (Figure 37B):
• Parker Thread Lube
• Mixture of 60% SAE 30W engine oil and 40% Parker Thread Lube
• SAE 30W engine oil
• Mixture of 90% SAE 50W engine oil and 10% STP
Figure 37A
Stud Thread Location
for Lubricant
Figure 37B
Crankcase Thru-Studs and Cylinder Hold-Down Studs
E. Use the Piston Ring Compressor (64559) to install the cylinders (Figure 38) as follows:
(1) Assemble the Piston Ring Compressor (64559) over the top piston rings and install the
correct cylinder over the piston on the corresponding connecting rod, pushing the Piston
Ring Compressor ahead with the cylinder barrel (Figure 39).
(2) As the cylinder barrel approaches the crankcase, catch the Piston Ring Compressor
(64559) as it drops off the piston skirt.
(3) As the cylinder assembly pilot is entering the crankcase, align the cylinder hold-down
studs with the holes in the cylinder flange.
(4) Push the cylinder until the cylinder flange makes contact with the crankcase.
(5) Install a vented plug in each spark plug hole on the cylinder to prevent the entrance of
foreign materials.
Figure 38
Piston Ring Compressor (64559)
Figure 39
Install the Cylinder