Maintenance
WP33L_BA_K1_12_en_08.fm
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8.10 Replacing gudgeon pins / bearings
1. Remove cylinder heads and valves as described in Chapter
8.8 “Checking the valves”.
2. Remove cylinders and pistons as described in Chapter 8.9,
“Checking the piston rings”.
3. Remove connecting rod bolts and take connecting rods out.
4. Press small end bearing out of the connecting rod‘s small end
with a proper tool.
5. Replace gudgeon pin and small end bearing.
6. Press small end bearing into the connecting rod‘s small end
with a propper tool.
7. Replace connecting rod, well oiled, and screw on the lower
half by hand. Make sure the connecting rods are in their cor-
rect position on the crankshaft.
After tightening, the connecting rod should rotate easily on
the crankshaft.
Note!
If the connecting rods are not held, when pulling off, they will fall
against the crankcase.
Note!
The boring in the small end bearing must align the boring in the
connecting rod eye, and the boring in the bushing must align the
upper part and the bottom part of the connecting rod.
boring
small end bearing
bushing
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