Safety Notice SAFETY NOTICE Providing safe dependable operation of your axle(s) and related compo- nents is important. This manual provides basic procedures for service and repair using established industry standards. There are many varia- tions in procedures to repair and maintain the axle and its related parts, however, it is not possible to provide you with all the detail for various service procedures.
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Brakes Electric brakes have been used on a variety of trailers for many years and offer many benefits to the driver. Please refer to the brake controller infor- mation provided by the installer of your towing vehicle for procedure and operation of the controller.
Electric Brake Maintenance ELECTRIC BRAKE MAINTENANCE Your trailer brakes should be adjusted between 250 to 300 miles after all of the brake components have seated. Since driving conditions and areas vary you should re-check brakes adjustments at a minimum of 3,000 miles.
Brake Troubleshooting TROUBLESHOOTING GUIDE FOR ELECTRIC BRAKES Dragging Brakes • Check for defective controller. • Check for corroded brake assembly. • Check for weak or broken brake shoe return spring. • Check for worn or damaged lever arm between magnet and brake shoe. •...
Electrical TROUBLESHOOTING GUIDE FOR ELECTRIC BRAKES Ineffective or • Ensure trailer is not overloaded. Weak Brakes • Check for loose or corroded connections. • Check for properly wired system. • Check for a shorted circuit. • Check for worn or defective magnet. •...
Electrical Individual amperage draw can be measured at the magnet by inserting the ammeter in the line of the magnet you wish to check. Disconnect one of the wire leads from the wire magnet and attach the ammeter between the two wires. Reconnect the wires when completed. BRAKE SIZE AMPS TO MAGNET 2 BRAKES...
The bearings are packed with lithium base grease. Your axles may be equipped with the Rockwell American Posi-lube system which provides for lubricating the hubs at a special grease fit- ting. This option allows grease to flow through specially machined axle spindles, which have been drilled to allow the grease to be passed from the fitting tothe inner bearing and back out through the outer bearing.
Hubs, Drums and Bearings HUB INSPECTION REMOVAL, REPLACEMENT AND ADJUSTMENTS A. Removal of Hub 1. Remove wheel 2. Remove grease cap 3. Remove cotter pin or bend tang washer on Posi-Lube 4. Unscrew the spindle nut counter clockwise 5. Remove spindle washer 6.
Posi-Lube 2. Torque Wrench Method Make sure nut is loose. Tighten nut with torque wrench to an initial torque of 50 ft. lbs. Loosen nut from initial torque and finger tighten. Insert new cotter pin through nut and spindle. If equipped with Posi-Lube, reset tang.
Suspensions ROCKWELL AMERICAN SUSPENSION SYSTEMS Single Axle Tandem Axle Double Eye Spring Double Eye Spring Single Axle Tandem Axle Slipper Spring Slipper Spring We also provide your suspension systems as well as the axle assemblies. These components are designed to perform a number of tasks to provide your trailer with the best and smoothest towing possible.
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You need to secure only the axle tube in order to remove and replace the part you want to replace. If your trailer has two axles you will need to support both axle tubes. Disassemble the attaching parts (u-bolts, nuts, and the links).
Torsion Axle THE EQUALIZER TORSION AXLE Your trailer may be equipped with our Equalizer axle(s). The Trailer manufacturer specifies their use according to individual engineering requirements. Each spindle is attached to a trailing arm which rocks up and down during road shock. This movement is transferred to a steel inner bar within the axle beam.
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Wheel and Tire Safety WHEEL AND TIRE SAFETY Your trailer manufacturer has specified the wheel and tires to be used. It is very important that you do not make any changes that may alter the recommended size or load capacities. Any deviations, however slight or unnoticeable, may cause damage or be dangerous to operate.
Replacement Parts REPLACEMENT PARTS MAGNET REPLACEMENT KITS BRAKE SIZE MAGNET KIT NUMBER WIRE COLOR BRAKE MTG. NUT TORQUE (FT-LBS) 7 x 1 1/4 K71-57 White 45-70 10 x 2 1/4 PPBM10E Green 45-70 12 x 2 PPBM12E White 25-50 12 x 3 1/2 4738-23 Orange 60-90...
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