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 TM 55-1905-242-14
0202 00
ALIGNMENT (continued)
5.
Position the dial indicator (7) against the transmission output flange (4) as shown. The dial indicator should have a 0.100
inch to 0.200 inch preload when installed against the transmission output flange.
6.
Zero the dial indicator (7) by twisting its bezel (8).
7.
Slowly rotate the propeller shaft (5) while noting the dial indicator (7) reading. Note how far the dial indicator needle
moves to either side of zero. 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 inch to one side of zero and 0.004 inch to the other side of zero, add
the two readings (0.002 inch + 0.004 inch = 0.006 inch) to determine that the angular misalignment is 0.006 inch.
7
6
8
4
5
3
Correct
Angular
Parallel
Alignment
Misalignment
Misalignment
8.
Maximum allowable angular misalignment is 0.025 inch (0.10 mm). Angular misalignment is corrected by loosening the
engine/marine transmission mounting bolts and repositioning the engine and marine transmission as necessary. After
adjusting the alignment, tighten the engine/marine transmission mounting bolts and recheck the alignment.
9.
Reposition the dial indicator (9) as shown to check the parallel alignment. The dial indicator should have a 0.100 inch to
0.200 inch preload when installed against the engine flange.
10. Slowly rotate the propeller shaft (5) while noting the dial indicator (9) reading. Note how far the dial indicator needle
moves to either side of zero. 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 inch to one side of zero and 0.004 inch to the other side of zero, add
the two readings (0.002 inch + 0.004 inch = 0.006 inch) to determine that the parallel misalignment is 0.006 inch.
0202 00-2
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