jcb 190T - Check (Condition); Main bearing surfaces

15 - Engine
12 - Crankshaft
00 - General
15 - 54 9813/9750-1 15 - 54
Check (Condition)
1. Check the main bearing surfaces for damage and
excessive wear.
2. Measure the crankshaft diameters to confirm
they are within service limits. Refer to
Crankshaft- Technical Data (PIL 15-12).
3. Check that the oilway cross drillings in the
crankshaft are clear and free from debris.
Blocked or restricted oilways will cause oil
starvation at the big end bearings.
4. Check that the piston cooling oil sprayers are
clear (if installed). If the sprayers cannot be
cleared remove the fixing screws. Remove the
sprayers and discard them.
Figure 141.
D
C
A
B
E
A Crankshaft B Shoulder half-rings
C Oil spray jets (if installed) D Fixing screws
E Main bearing shells