Background Image
Table of Contents Table of Contents
Previous Page  276 / 1002 Next Page
Information
Show Menu
Previous Page 276 / 1002 Next Page
Page Background

1.05L REVOTORQ ENGINE

65

M. CRANK SHAFT:

Clean and carry out visual inspection of crank

shaft for the following:

1. Overheating of journals, this is indicated by

bluish brown color.

2. Scoring marks on journals

3. Cracks, which should be checked on magnetic

crack detector

4. Check crank shaft run out by supporting it on

V-block at 1st and 3rd main bearing journals.

5. If run out exceeds permissible limits, straighten

crank shaft in cold condition on press carefully.

6. Similarly check lateral and radial run outs of

flywheel mounting flange.

7. Check crank shaft main bearing and crank pin

journal dimension.

8. Record the readings in the format given at the

end of this group.

9. If necessary, grind crank shaft main bearing

and crank pin journals to next under-size.

10.Maintain correct fillet radius for journals

11.Care must be taken during grinding to ensure

that width of journals is not increased.

12.Should it be necessary to grind sides of 4th

main bearing journal, grind it to next undersize.

13.Re

-chamfer oil holes on journals to avoid

scoring of new bearing shells.

14.Finish journals by lapping them with 320 grit

lapping cloth of suitable width.

15.After grinding recheck main bearing and crank

pin journal dimensions.

16.Also recheck run out of crank shaft.

17.Thoroughly clean crank shaft with kerosene.

Use wire brush for cleaning oil holes

NOTE

It is essential to recheck crankshaft for

cracks and balance after grinding.

18.Apply grease to all machined surfaces, if crank

shaft is to be stored. Crank shaft must always

be stored in vertical position.

19.Thoroughly clean main bearing caps and

corresponding

machined

surfaces

of

crankcase.

20.Install main bearing caps without bearing

shells in their respective positions on

crankcase.

NOTE

Ensure that the serial numbers on crank

case and main bearing caps are matching.

Also caps are in order and notches

forbearing shells are on same side.