![]() In my opinion, front wheel bearings need to be bigger. One benefit of the larger axles is larger front axle wheel bearings. springs, increase the caster settings and you maybe surprised. Some vehicle 13,200 lbs front axles are available, but may still be a marginal solution, in my opinion.įor driver complaints regarding trucks that “float and wander,” I recommend replacing the springs with 14,600 lb. springs especially if it is a sleeper and or a reefer unit is on the front of the trailer. also change to an approximately 14,000 axle with 14,600 lbs. Cummins 6 Cylinder Diesel Engine, 6-Speed Manual Transmission, 12000 lb Front Axle, 21000 lb Rears, 33000 lb GVWR, 295/75R22. As a result, I would suggest if you are spec’ing a Class 8 vehicle for a gross weight 80,000 lbs. We also installed stiffer air ride cab shocks. I now completely understand the value of shocks and their angle. on 50 trucks, and changed the angle of the shocks, from 50º to a perfectly vertical 90º. Raise front end until wheels (tires) just clear floor. Disassembly operations should be performed in the following order: Hub caps - remove. We solved the issue by replacing the 12,000 lb. KING PIN & KNUCKLE REPLACEMENT SECTION IV STEERING KNUCKLE REMOVAL NOTE: This service and repair procedure is with axle I-beam left in place on vehicle. In the cab, the driver’s seat and the front end floated and the driver could not drive without over steering and the fatigue was wearing him out. The fleet had premium vehicles I mean nice trucks with a high center of gravity cab. It was so bad the drivers were quitting and there was even a lawsuit pending. I was working with a fleet that was fielding complaints about this problem, which was creating operational and driver issues. It slows tire outer edge tire wear, stiffens up the front of the vehicle gives the tractor more stability to stay up right and also reduces the ride complaints of the truck floating and wandering all over the highway and on secondary roads. Twin Steer Axles) 12,000 lb Rear Axle Weight (Include Lift Axles) 21,000 lb. However, I have proven to myself over the years that it does. A typical King Pin Kit containing the particular type of pin is shown to aid. Heavy springs on the front axle? Engineers and salespeople said we did not need the extra capacity, and it would hurt the ride. This provides an additional 500 lbs capacity on the front axle, compared to a 12,000-lb. front springs, when I could not buy what I wanted. We offer a 12,500-lb front axle rating for multiple applications. ![]() I later increased the capacity by specing 14,000 lb. I believed this was due to the steer axle tires having accelerated tire wear because the front of the truck would push down in the corners (like in NASCAR race, pushing in the corners at 180 MPH). The reason I did this was not for the added capacity, but for the ability to stiffen up the front axle stability. I was always questioned about spending more money for “nothing.” I have done everything I can think of to repair the problem and even sent the tractors to the local frontend shop.”įor years, when spec’ing tractors, I would increase the front axle capacity of the springs from the standard 12,000 lbs to 13,200 lb. Here’s a concern I’ve heard: “Our tractors wander, floating feelings and the drivers keep writing them up.
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