TM 9-4520-272-14&P
0040 00
NOTE
It may be necessary to push the entire engine assembly to the right slightly in order to
gain the necessary clearance between the shafts in order to remove and install the
portions of the coupling assembly.
7. Slide the right hand portion (6) of the coupling assembly (3) left along the engine drive shaft (7) and
remove.
8. Slide the left hand portion (2) of the coupling assembly (3) to the right off the fan drive shaft (4) and
remove.
9. Clean the residual retaining compound on both shafts with a wire brush. Removal of old retaining
compound and any corrosion is important before installing new coupling assembly.
10. Use retaining compound cleaner or equivalent degreaser to wipe down shafts upon removal of
coupling halves.
11. Spray retaining compound primer on both shafts ensuring that both shafts are covered half way back
from the ends, rotating shaft as primer is being sprayed.
12. Completely remove the hex cap screws (1 and 5) on both the left and right hand portions of the new
coupling assembly.
NOTE
Ensure that the remaining steps are performed within ten minutes of applying retaining
compound to ensure that the retaining compound has not begun to set up before the
coupling assembly has been installed on the shafts.
13. Apply three to four drops of retaining compound to the interior bore of the new left and right portions
of the coupling assembly.
14. Slide one portion (2) of the new coupling assembly (3) onto the fan drive shaft (4) taking care to align
the slot (10) on the left portion (2) of the coupling assembly (3) and the woodruff key (9) mounted on
the fan drive shaft (4).
15. Slide the left portion (2) of the coupling assembly (3) onto the fan drive shaft (4) until the left edge is
1/2 inch from the fan drive pulley (13).
16. Slide the right portion (6) of the new coupling assembly (3) onto the engine shaft drive (7) taking care
to align the slot (10) on the right portion (6) of the coupling assembly and the woodruff key (9)
mounted on the engine drive shaft (7).
17. Slide the right portion (6) of the coupling assembly onto the engine shaft (7) allowing sufficient room
to insert the center rubber section (8).
18. Install the center rubber section (8) of the coupling assembly between the left (2) and right (6)
portions of the coupling assembly (3).
0040 00-2