Yanmar 4LHA-HTP Operation Manual page 350

Chapter 2 Basic Engine
7. Crankshaft and Main Bearing
Outside dia.
Bushing inside dia.
Crank pin Crank pin Crank pin
Crank pin and bushing oil clearance
Outside dia.
Bushing inside dia.
Crank journal Crank journal Crank journal
Crank journal and bushing oil clearance
Fillet rounding of crank pin and journal
(4) Checking side clearance of the crankshaft
After assembling the crankshaft, tighten the main bear-
ing cap to the specified torque, and move the crank-
shaft to one side, placing a dial gauge on one end of
the shaft to measure thrust clearance.
This measurement can also be effected by inserting
the gauge directly into the clearance between the
thrust bearing and crankshaft thrust surface.
Replace the thrust bearing if it is worn beyond the limit.
Crankshaft side gap
(0.0052 - 0.0088)
mm (in.)
Standard
Wear limit
0.132 - 0.223 0.29
(0.0114)
Standard
59.952 - 59.964
(2.3603 - 2.3608)
60.00 - 60.042
(2.3622 - 2.3639)
0.036 - 0.09
(0.0014 - 0.0035)
69.952 - 69.964
(2.7540 - 2.7545)
70.00 - 70.045
(2.7559 - 2.7577)
0.036 - 0.093
(0.0014 - 0.0037)
4 . 0 - 4 . 3
(0.1575-0.1693)
Crankshaft
2-30
i 4LHA Seriei
mm (in.)
Wear limit
59.90
(2.3583)
60.10
(2.3661)
-
69.90
(2.7520)
70.10
(2.7598)
-
—
Dial indicator