Figure 3. Dial Indicator/Parallel Alignment Depiction

TM 55-1925-292-14&P

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13. Reposition the dial indicator (figure 3, item 1) as shown in figure 3 to check the parallel alignment.

NOTE

The dial indicator should have a 0.200 in (5.08 mm) to 0.300 in (7.62 mm) preload when

installed against the PTO output flange.

14. Place a 0.200 in (5.08 mm) to 0.300 in (7.62 mm) preload on the dial indicator.

Parallel

Correct

Misalignment

Alignment

Figure 3. Dial Indicator/Parallel Alignment Depiction

NOTE

Observe the dial indicator's needle movement to either side of zero as the pump shaft is

rotated. Add the readings on both sides of zero to determine the amount of parallel

misalignment. For example, if the dial indicator needle moves 0.002 in (0.05 mm) to

one side of zero and 0.004 in (0.10 mm) to the other side of zero, add the two readings

(0.002 in (0.05 mm) + 0.004 in (0.10 mm) = 0.006 in (0.15 mm)) to determine that the

parallel misalignment is 0.006 in (0.15 mm).

15. Slowly rotate the pump shaft (figure 3, item 2) while noting the dial indicator (figure 3, item 1) reading.

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