HARRIER BOOK 1

KRYOTEC ENGINE

K. 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 1

and 5

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. The following is an example of a class

identification of the main journals.

• Crank pin identification (1): The number on the left

refers to the first pin on the timing side. The “N” at

the end is a code not significant for 4-cylinder

engines.

• Crank journal identification (2): the first number

on the left refers to the first journal on the timing

side. The “N” at the end is a code not significant for

4-cylinder engines.

• Number blocks (if any), in groups of two digits (3),

indicate the size (thousandth part) of the main

journals: the first two numbers on the left refer to

the first journal on the timing side.

• For the identification of the class of journals you

should refer to the numerical code of reference (2).

• In the case of the example, numbers 11111N

indicate that all five pins are Class A (red).