<Undersize bearings available>
Standard
0.25 (Inside diameter is 0.25 mm lesser than the standard size.)
0.50 (Inside diameter is 0.50 mm lesser than the standard size.)
0.75 (Inside diameter is 0.75 mm lesser than the standard size.)
1.00 (Inside diameter is 1.00 mm lesser than the standard size.)
Undersize bearings are available in 4 different sizes as indicated above, and the crankshaft can be reused
through the regrinding as described above.
Caution:
In case of regrinding, the grinding the “R” part of bearing end should be correctly done and keep
in mind to remove any jaws or coarse surface absolutely.
(3) Crankshaft run-out
Support the crankshaft on V blocks.
Turn the crankshaft with a dial indicator placed on the
surface plate and take the amount of crankshaft run-out.
2) Crankshaft bearing and connecting rod
(1) Visual check
Visually check the crankshaft bearing and connecting
rod bearing for scores, uneven wear or damage.
(2) Oil clearance between crankshaft and bearing
(Method 1: dial gauge)
Main bearing clearance
Install the main bearing in the cylinder block, tighten
the bearing cap to specified torque, then measure the
inside diameter.
Compare the two values obtained through
measurement of main bearing inside diameter with the
SPC000006 5ton Diesel Engine
Page 56
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