Cleaning. - TM-55-1930-208-240111

TM 55-1930-208-24

3-20.

BLOWER DRIVE - Continued.

c. Cleaning.

WARNING

Do not breathe cleaning solvent P-D-680 vapors for long periods of time or use solvent near

open flames. To avoid illness, explosion, or fire, only use solvent in well-ventilated areas away

from open flames.

(1) Clean all parts thoroughly with cleaning solvent (item 4, Appendix C) and dry thoroughly.

(2) Make sure that oil grooves, oil holes, and cavities are free of dirt.

d. Inspection.

(1) Check for worn or scored thrust washers.

(2) Inspect blower drive coupling support, cam, spring seats, and spring packs for worn or damaged

parts.

(3) Check for worn or damaged serrations on blower drive shaft.

(4) Examine blower drive gear for worn, scored, or pitted teeth.

e. Repair. Repair of the blower drive consists of the replacement of defective parts.

f. Reassembly.

(1) Refer to figure 3-44 and install plug (30) in housing.

(2) Attach chain (29) between oil filler cap (26) and oil filler tube (27). Install filler cap and filler tube

with strainer (28) in housing.

(3) Press drive gear hub (19) into drive gear (20).

(4) Lubricate drive gear hub, bearing (25) in the housing, thrust surfaces, and thrust washer with

engine oil (item 8, Appendix C).

(5) Place thrust washer (24) on the protruding bearing in gear side of housing and insert drive gear

and hub assembly.

(6) Locate lock ball (18) in its place on drive gear hub and slide thrust washer (17) into position over

lock ball. Thrust washer must be installed with tapered face toward the threads on the hub.

(7) Install new lockwasher (7) and finger tighten hub nut (8). Install two bolts into threaded holes in

drive gear hub. Place a suitable holding bar across bolts to keep hub from rotating and tighten

hub nut to 50-60 lb-ft (68-81 Nm). Bend the ears of lockwasher against the nut, to lock the nut in

place. Remove two bolts from gear hub.

3-74