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DANGER: BE CERTAIN THAT ALL POWER IS SHUT OFF BEFORE SERVICING THE 4 WHEEL STEER HEADER TRANSPORT.
Hub Removal:
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Elevate and support the trailer unit carefully.
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Remove the wheel.
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Remove the grease cap by carefully prying pregressively around the flange ofthe cap.
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Remove the cotter pin from the spindle nut or, in the case of E-Z Lube versions, bend the locking tang to the free position. For E-Z
Lube axles produced after February 2002, a new type of retainer is used. Gently pry off retainer from the nut and set aside.
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Unscrew the spindle nut (counterclockwise) and remove the spindle washer.
•
Remove the hub from the spindle, being careful not to allow the outer bearing cone to fall out. The inner bearing cone will be re-
tained by the seal.
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For 7,200 lb. and 8,000 lb. axles, a hub puller should be used to assist in drum removal.
Bearing Lubriation:
Along with bearing adjustment, proper lubricatino is essential to the proper function and reliability of your trailer axle. Bearings should
be lubricated every 12 months or 12,000 miles. The method to repack bearing cones is as follows:
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Place a quantity of grease into the palm of your hand.
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Press a section of the widest end of the bearing into the outer edge of the grease pile closest to the thumb forcing grease into the
interior of the bearing.
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Repeat this while rotating the bearing from roller to roller.
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Continue this process until you have the entire bearing completely filled with grease.
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Before reinstalling, apply a light coat of grease on the bearing cup.
Use a good quality LS EP2 severe duty, high shock load, lithium-based grease.
Bearing Adjustment and Hub Replacement:
If the hub has been removed or bearing adjustmennt is required, the following adjustmnet precedure must be followed:
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After placing the hub, bearings, washers, and spindle nut back on the axle spindle in reverse order as detailed in the previous
section on hub removal, rotate the hub assembly slowly while tightening the sprindle nut to approximately 50 ft-lbs (12" wrench or
pliers with full hand force).
•
Then loosen the spindle nut to remove the torque. Do NOT retate the hub.
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Fingle tighten the spindle nut until just snug.
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Back the spindle nut out slightly until the first castellatin lines up with the cotter key hole and insert the cotter pin (or looking toang
in the case of E-Z Lube).
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Bend over the cotter pin legs to secure the nut (or locking tang in the case of E-Z Lube).
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Nut should be free to move with only restaint being the cotter pin (or locking tang).
For axles using the new nut retainer:
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Finger tighten the nut until just snug, align the retainer to the machined flat on the spindle and press the retainer onto the nut. The
retainer should snap into place. Once in place the retainer/nut assembly should be free to move slightly.
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If the nut is too tight, remove the retainer and back the nut off spproximately one twelfth of a turn and reinstall the retainer. The nut
should now be free to move slightly.
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Reinstall grease cap.
E-Z Lube Lubrication:
•
Remove the rubber plug from the end of the grease cap.
•
Place a standard grease gun onto the grease fitting located in the end of the spindle. Make sure the grease gun nozzle is fully
engaged on the fitting.
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Pump grease into the fitting. The old displaced grease will begin to flow back out the cap around the grease gun nozzle.
•
When the new clean grease is observed, remove the grease gun, wipre off any excess, and replace the rubber plug in the cap.
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Rotate hub or drum while adding grease.
10
Hub and Bearing Maintenance
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