Yanmar 4LHA-HTP Operation Manual page 351

Chapter 2 Basic Engine
7. Crankshaft and Main Bearing
7-2 Main bearing
(1) Inspecting the main bearing
Check for flaking, seizure or burning of the contact
surface and replace if necessary.
(2) Measuring the inner diameter of metal
Tighten the cap to the specified torque and measure
the inner diameter of the metal.
Bearing cap bolt tightening torque
Thrust metal (Flywheel side)
Main bearing cap (basic)
Main bearing bolt
NOTE: When assembling the bearing cap, keep the follow-
N(kgf)-m
186-206
(19-21)
Main bearing metal (basic)
Thrust metal (gear side)
2-31
ing in mind.
1) The lower metal (cap side) has no oil groove:
2) The upper metal (cylinder block side) has an oil
groove.
3) Check the cylinder block alignment No.
4) The "FW" on the cap lies on the flywheel side.
/Main bearing metal (intermediate)
« 2 ?
I , Main bearing cap (intermediate)
14LHA Serie.