**BASIC BLOCK**

**TESTING AND ADJUSTING**

6.

Turn the crankshaft counterclockwise to put the

dial indicator at (C). Write the measurement in

the chart.

7.

Turn the crankshaft counterclockwise to put the

dial indicator at (D). Write the measurement in

the chart.

**CHART FOR DIAL INDICATOR MEASUREMENTS**

Position of dial indicator

Line

No.

A

BCD

Correction for bearing clearance

I

0

Dial Indicator Reading

II

0

Total of Line 1 & 2

III

0

8S2328 DIAL INDICATOR GROUP INSTALLED

*Total Vertical eccentricity (out of round).

**NOTE: Write the dial indicator measurements with**

**Subtract the smaller No. from the larger No.

The

difference is the total horizontal eccentricity.

**their positive (+) and negative (-) notation (signs).**

**This notation is necessary for making the**

A10234X5

**calculations in the chart correctly.**

8.

Add lines I & II by columns.

3.

Divide the measurement from Step 2 by 2. Write

this number on line 1 in columns (B) & (D).

9.

Subtract the smaller number from the larger

number in line III in columns (B) & (D). The

4.

Turn the crankshaft to put the dial indicator at

result is the horizontal eccentricity (out of round).

(A). Adjust the dial indicator to "O" (zero).

Line III, column (C) is the vertical eccentricity.

5.

Turn the crankshaft counterclockwise to put the

10.

On the graph for total eccentricity, find the point

dial indicator at (B). Write the measurements in

of intersection of the lines for vertical eccentricity

the chart.

and horizontal eccentricity.

11.

If the point of intersection is in the range marked

"Acceptable", the bore is in alignment. If the

point of intersection is in the range marked "Not

Acceptable", the flywheel housing must be

changed.

CHECKING BORE RUNOUT OF THE FLYWHEEL

HOUSING

GRAPH FOR TOTAL ECCENTRICITY

**147**