Ford

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F-450 / 550 (1999 & newer)
F-650 / 750

FAQ's
Frequently Asked Questions

» Can I run the bags empty? It will not hurt the bags to run empty, but the ride will be very harsh. When the bags are empty, you probably will not be able to turn very sharp because the tires will rub on the lower rear part of the fenders.

» How tall can I run the bags? Running the bags completely topped out will not only yield a harsh ride, but typically put the pinion angles, driveline and alignment out of specs. It will ride harsh because there is no rebound if they are topped out. When the bags are all the way up, the front left tire will tend to be sticking out of the front fender well farther than the right front.

» Should the bottom of the bag be straight? Not being straight will not hurt the bags. Air bags are run in industrial applications up to 30 degrees. We try to keep the bags straight as possible, but the bottoms may be angled a little as the pinion angle of the axle is set. As far as up and down goes, the kits are designed for the bags to set pretty square. If your application has an adjustable panhard bar, use that to make sure the axle has the same amount sticking out from side to side. Once this is equal, the bags should be straight.

» Do the bags wear out? As long as the bags do not have anything rubbing on them, they should last for years. Periodically check your bags to make sure nothing is rubbing on them and no rocks or debris has lodged in between the air bags and steel framework. Be sure to thoroughly wash the bags after mudding. Blowing a bag should be no rarer than getting a flat tire.

» What should my bag's height be? Use the following chart to monitor your bags heights.

Bag Number Air Ride Height
8979 bag 6.5 inches 11-13 inches
5323 bag 4.5 inches 7-9 inches
9619 bag 10.5 inches 14-18 inches
5770 bag 4 inches 7-9 inches


» Do I need limiting straps? Unless you are planning on jumping your truck, limiting straps are not required. The only other time they would be helpful is if the truck is going to be lifted by a frame hoist/lift with the shocks removed.

» Can I blow up a bag? The bags are designed by Firestone to be operated at a maximum continuous pressure of 100 psi. The bags are also pressure tested to operate at over 300 pound spikes. With the air compressors that we use, it would be very difficult to blow up a bag.
Kelderman Ford Air Bag Suspension lift kits for any brand of 4x4 are one of the most sought-after items from us, to improve the look of your vehicle as well as increase its quality performance. Kelderman is the trademark of Kelderman Ford lift kit from old to current models of Ford pick-ups because of its durability and longstanding running capabilities.

For installing massive tires with ease and creating a better handling experience with your 4WD, Kelderman Ford Air Bag suspension lift kit facilitates such enhancements easily. Depending on your budget, you may choose to overhaul with just Kelderman Ford lift kit or get a complete body lift – where you’d also need to pimp up the rear parts to raise your rig for better ground clearance. Since the suspension package of every vehicle varies, its net lift height also has to be adjusted. But when you have a Kelderman Ford Air Bag suspension lift kit, there’s no need to worry about anything – because their expert staff there will make sure that your ride will run and look perfectly as you visualize it.

As a plus to that, if ever you decide to get yourself an Ford Truck Kelderman lift kit, each Kelderman Ford lift kit is custom-configured for your vehicle. Additional parts and accessories are also available upon request. Please do contact us anytime to inquire about these and other products.
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