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EARTHBOUND RECREATIONAL VEHICLE TRAILER OWNER'S MANUAL
AXLE AND RUNNING GEAR ASSEMBLY
Each RUBBER TORSION axle is aligned during manufacturing, and double-‐checked on a random basis.
Alignment after delivery is the customer's responsibility.
Hitting chuck holes or rough railroad tracks while going straight will only cause misalignment after the tire
has been struck many repetitive times. Of course, a deep enough hole can affect the alignment immediately.
The worse culprit is a curb because they are normally struck at an angle. Surprisingly rear axles are
occasionally damaged when people are attempting to park beside a curb and are backing up their trailer.
As you look under your trailer is it normal for the axle to be bent up in the middle. This bend is how the
camber is obtained.
Toe-‐in is built into the axle by very slight bends in the axle tube on each end.
If tire wear ever indicate misalignment check with your dealer for the nearest location having the proper
equipment.
CAUTION
: Never allow heat to he applied to the axle tube since the rubber providing the spring
torsion action will he severely damaged.
Wheel Bearing Maintenance
1. Jack trailer at marked jack location pad behind axle on mainframe,
2. Remove hubcap or spindle cover, wheel and tire.
3. Remove cotter pin.
4. Remove dust cap.
5. Remove spindle nut and washer.
6. Remove bearings, hub and rotor.
7. Lay down hub and rotor with inside grease seal down. Knock out inner bearing and grease seal using
wood or plastic dowel and hammer.
8. Clean all parts thoroughly with kerosene.
9. Check all bearings and races for chips or roughness of any kind. Any damaged component must be
replaced.
10. Pack bearing with a good grease (No 2 grade-‐265 ASTM penetration or equivalent).
11. Install inner bearing.
12. Install new grease seal in hub or rotor using wooden or rawhide mallet.
13. Install hub and drum on spindle.
14. Install outer bearing.
15 Install washer and spindle nut.
16. While rotating the wheel, tighten the spindle nut with a 12" wrench until there is a slight tension. Then
back off one notch and install cotter pin. There should now be from .001" to .010" endplay in hub. If not,
back off one notch.
17. Check the lug nuts at 25, 50 miles and recheck at 100 miles of travel. Aluminum wheels should be
tightened to torque of 100 ft. lbs, steel wheels to 90-‐95 Ft. Lbs.
When greasing bearings by hand, place a glob of grease in the palm of one hand and push the large end of the bearing
down into the grease. Keep turning the bearing around and forcing it down through the grease until the grease is
extruded up through the opposite end. Wipe the extra grease in your hand around the outside of the bearing. It's not
necessary to fill the hub and dust cap with grease.
