Ditch Witch MV800 - Manual (Page 93)

Service - 92
MV800 Operator’s Manual
12,000 Mile
CMW
®
Adjust and Lubricate Bearings
1. Place adequate jack stands under frame rails
and remove wheels.
2. Unscrew grease cap (11) while holding the
hub stationary.
3. Bend locking tang (14) down from outer
spindle nut (13) and remove spindle nut (3).
4. Remove tang washer, unscrew inner spindle
nut and remove spindle washer (16).
5. Remove hub from spindle. Do not drop outer
bearing cone.
6. Pry seal (2) from hub and remove inner
bearing cone (3).
7. Inspect brake drum for excessive wear or heavy scoring.
8. Clean all grease from bearing cups (4,8), cones (9,3), hardware, and hub bore using suitable solvent.
Dry components with lint free cloth.
9. Inspect bearing cups and cones for pitting, spalling, and corrosion. Replace if damaged.
10. Pack all cones using an extreme pressure, water resistant lithium complex grease. Apply light coating
of grease to bearing cones.
11. Install the bearing and washer into the hub. Thread on the inner nut, rotate the hub, and tighten the nut
until the hub will not rotate. This requires a minimum of 100 ft•lb (136 N•m) of torque.
12. Loosen the nut to remove preload torque.
13. Hand tighten the nut and back it off 1/4 to 3/4 of a turn.
14. Place tang washer on spindle and bend one tang inward over the nut. This will keep the inner nut from
turning while torque is applied to the outer nut.
15. Install the outer nut. Ensure that inner nut does not turn. Bend two tangs from the tang washer over the
outer flats to secure.
16. Install cap with o-ring and plug installed. Rotate the hub and check bearing adjustment. Allowable end
play is .001-.010” (.025-.25 mm).
Condition Recommended Action
Brake drum worn more than .020” (.5 mm). Remachine drum surface
Brake drum worn out of round more than .015” (.39 mm).
Brake drum has scoring and other wear greater than .090” (2.29 mm) Replace drum