TM 10-4320-307-24
3-7
FLEXIBLE COUPLING INSPECT/ALIGN/REPAIR/REPLACE (CONT).
NOTE
See calculation method on Alignment
Record Lateral Reading
g.
Check that readings do not exceed maximum
coupling manufacturers tolerances.
Amax = ± 2.5 mm (0.098 inch)
Xmax = 1.56 mm (0.061 inch)
Lmax = 1.2 mm (0.047 inch)
NOTE
Example 1 is an entry of A = 0.035 inch
(36% o 0.098), L = 0.007 inch (14% of
0.047) and X = 0.020 inch (0.52 mm). Any
point on the graph indicates an acceptable
field alignment check. the smaller angular
error (X = 0.13 mm or 0.005 inch) in
Example 2 allows a greater misalignment in
both A (1.48 mm or 0.058 inch) and L (0.34
mm or 0.013 inch). Both Examples 1 and 2
indicate acceptable conditions not requiring
engine realignment. Smaller X, L, or A than
any point read from the graph is also
acceptable. If the correlated misalignment
values do not fall within the limits indicated,
realignment of the engine is required.
Proceed to step 3.
3-16
