M88A1…Keep Final Drive Sprockets On TrackPosted: 2016/23/06
Mechanics, the final drive hub sprocket’s threaded bolt holes on your M88A1 can strip or even break if you don’t do PM. That could leave your vehicle with a wobbly final drive sprocket.
Here’s how to keep those bolt holes in good shape and your final drive sprocket on track:
- During semi-annual PMCS, inspect the final drive hub bolts. Re-torque loose bolts, NSN 5306-00-799-7722, to 225-250 lb-ft. Locking nuts, NSN 5310-00-225-6408 should be torqued to 70-90 lb-ft.
- Only use those locking nuts once. If they’re loose or have to be removed, replace ‘em.
- Always use a dab of GAA on the final drive hub sprocket bolts and locking nuts during installation.