Lippert Components Trailer Axle (8-12K) - Manual (Page 10)

Rev: 04.18.2014
Page 10
Trailer Axle 8-12K Owners Manual FULL
Periodic Bearing Inspection
A physical bearing inspection should be conducted every 15,000 miles. An inspection of the bearing
condition can detect early bearing issues. Upon inspection, bearings should look brand new and can be
reassembled and used if in this condition. If discoloration, pitting, corrosion, flat spots or some abnormal
condition is observed, the bearing and race should be replaced at the same time. Bearings are available at
auto part stores, see components pages (27-36) for part numbers.
Spindle nut adjustment
The proper method to assemble the spindle nut is as follows:
1. After hub installation onto spindle, install outer bearing.
2. Install spindle washer and thread on spindle nut with slots facing outward.
3. Tighten spindle nut with a pair of slip joint pliers to approx 50 ft-lbs.
4. Back off torque usually 1/4 turn so that you can finger tighten the spindle nut.
5. Finger tighten, drop cotter pin through slot and hole in spindle. If slot in nut does not align with hole in
spindle, back nut off until it does, never tighten past finger tight.
6. Bend legs over end of spindle and be sure legs do not interfere with oil cap upon reassembly.
Disc Brake Option
Disc Brake Pads
Disc brake pads are available through auto part stores. Brake pads are a consumable item so be sure to
visually check pads every 3,000 miles. Be sure to also check rotor surfaces visually when you are checking
the brake pads. Deep groves developing on one or both rotor surfaces can indicate a caliper piston, slider
bolt or residual pressure problem if this ever occurs. Brake rotors should be turned when disc brake pads are
replaced.
Disc Brake Caliper
The proper mounting torque for the disc brake caliper mounting bolts is 40-50 ft-lbs. If these are removed
for servicing the brake system, add blue thread locking compound to the threaded area of the bolt at time
of reassembly. Also lubricate the inside of caliper bushings that the slider bolts go through. Be sure to only
use silicone based grease. The rubber bushings are not compatible with petroleum-based greases.