Inspect fan housing for cracks or warpage

TM 9- 2920- 224- 34&P

DISASSEMBLY OF THE GENERATOR ASSEMBLY - CONTINUED

0008 00

bh. Assemble all parts except nuts, springs, and spring packing retainer with indicator marks alined. Put these

parts temporarily into generator armature shaft bore so that internal and external splines of armature are

engaged. Check relationship of indicating mark (58) on edge of dampener generator plate. The mark on plate

should be approximately midway between the two marks on disc of shaft assembly. If marks do not assume

this relationship, it indicates that shaft assembly is twisted and must be replaced.

bi. Inspect fan housing for cracks or warpage. Replace entire tube axial fan if defective.

bj. Inspect the fan housing for scratches, burrs, and nicks on machined surfaces, especially in the sealing areas.

If minor defects cannot be removed with minor repair, entire tube axial fan must be replaced.

bk. Inspect threads in tapped holes in fan housing. Replace entire tube axial fan if threads are stripped.

bl. Remove impeller from fan motor and unsolder electrical wires as follows.

bm. Remove and discard preformed packing (59) from fan housing (60). Insert a screwdriver between vanes of

impeller and remove self--locking nut (61) and flat washer (62). Discard nut.

bn. Tap end of motor shaft (63) with a soft--faced mallet to free impeller (64) from shaft. Remove woodruff key (65).

bo. Inspect impeller for cracks or corrosion. Replace if defective.

0008 00- 16