Figure 2. Dial Indicator/Angular Alignment Depiction

TM 55-1925-292-14&P

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Angular

Correct

Misalignment

Alignment

Figure 2. Dial Indicator/Angular Alignment Depiction

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.

8. Position the dial indicator (figure 2, item 3) against the PTO output flange (figure 2, item 4) as shown in

figure 2.

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

10. Zero the dial indicator (figure 2, item 3) by twisting the indicator's bezel (figure 2, item 5).

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 angular

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

angular misalignment is 0.006 in (0.15 mm).

11. Slowly rotate the pump shaft (figure 2, item 6) while noting the dial indicator (figure 2, item 3) reading.

12. Maximum allowable angular misalignment is 0.150 in (3.80 mm). If the angular misalignment exceeds this

specification, the misalignment must be corrected. Angular misalignment is corrected by loosening the

pump mounting bolts (figure 1, item 6) and rotating the pump on its mounting. After adjusting the alignment,

tighten the pump mounting bolts and perform steps 7-12 until the misalignment is within the maximum allow-

able misalignment specifications.

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