TM 10-3950-672-24-2
Determine the Total Indicator Reading (TIR). The
following is intended to give examples of TIR
calculations with a mix of positive (+) and negative (-)
readings.
mm
in
12 o'clock
0.00
0.000
6 o'clock (adjusted)
+0.16
+0.0064
Total Vertical Reading =
+0.16
+0.0064
3 o'clock
+0.08
+0.003
9 o'clock
-0.08
- 0.003
Total Horizontal Reading =
0.00
0.000
+0.16
+0.0064
TIR =
0.16
0.064
12 o'clock
0.00
0.000
6 o'clock
+0.16
+0.0064
Total Vertical Reading =
+0.16
+0.0064
3 o'clock
+0.08
+0.003
9 o'clock
-0.05
- 0.002
Total Horizontal Reading =
+0.03
+0.001
+0.16
+0.0064
TIR =
0.19
0.0074
The maximum allowable Total Indicator Reading (TIR)
is determined by the diameter of the housing bore. If
out of specifications replace the housing.
SAE
Bore Diameter
TIR Max
No.
mm
in
mm n
2 447.68 to 447.80
17.625 to 17.630
0.20 0.008
3 409.58 to 409.70
16.125 to 16.130
0.20 0.008
Flywheel Housing Face Alignment Check
Caution: The dial indicator tip must
not enter the capscrew holes or the
gauge will be damaged.
Install a dial indicator as illustrated.
Note: The extension bar for the
indicator must be rigid for an
accurate reading. It must not sag.
Position the indicator at the 12
o'clock position. Adjust the dial until
the needle points to zero.
5-183