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1. Using a grease packer, pack both roller bearings with a good grade of wheel grease. The bearings should
be thoroughly coated with grease. Spread grease on the outside of the bearing with your gloved finger.
Ensure that no dirt or filings contact the grease or the bearings.
2. Pack the inside of the hub with grease. Grease needs to cover complete surface area inside hub but does
not need to fill cavity.
3. Smear grease on both races.
4. Install the large bearing into the back of the hub and rotate the bearing several times.
5. Install the dust/grease seal using the right size seal driver. Spread a film of grease on the dust seal rubber
and on the axle where the seal fits.
6. Position the hub on the axle and firmly push into place then pull hub towards you about 1". Slowly rotate
hub while gently pushing the hub back onto the axle.
7. Check dust seal to ensure seal rubber is positioned correctly.
8. Install the small or outer bearing.
9. Install the axle washer and castle nut on the axle.
Tightening Instructions for 812 Hubs
Proper setting for the tapered roller bearings is described in the following procedure. Always use a new cotter
pin when making adjustments to the hubs.
1. Tighten the castle nut to 50 foot pounds while turning hub clockwise. Then back the nut off 1/2 of a turn.
Spin the hub 2 or 3 times. While slowly turning hub clockwise, finger tighten the castle nut until castle nut
notch lines up with hole in axle. If notch will not line up, back off nut to previous notch.
2. Put the cotter pin in the axle hole. Before bending the cotter pin, spin the hub. The hub should free wheel
from 1/2 to 1 full turn.
3. If the hub spins the right amount, finish installing the cotter pin by bending the ends.
4. Coat the inside of the dust cap with a thin coat of grease by using your gloved finger. Then install on hub
using the right dust cap driver.
5. Wipe off all excess grease from hub and axle.
There should not be any drag noticed when spinning a tire installed on a hub. If the axle nut
is too tight, the rollers of the wheel bearings will remove the grease from the bearing races,
decreasing the life of the bearings.
Gladiator RWP-1935 01/23
© 2023 Alamo Group Inc.
MAINTENANCE
Maintenance Section 5-12
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