Trust me if you are 4 psi low you will feel the difference the first time you hit a bridge or pot hole. I did do a 2 week trip to the Keys and I probably added about 3-4 psi for my return.
#FLEX AIR PIN BOX FULL#
Longer trips I would suggest you take a portable air tank or compressor with you I usually carry a full 11 gallon air take just in case. Most trips I am gone only 4 or 5 days and there is no need to add any air for your return home. The bag does seem to loose pressure while sitting but the most I have had to add is about 8-10 psi after it has sat for a month. I have found that after you find that sweet spot check the pressure and the next time you hook up just check to make sure the pressure is right and you are good to go. All you really need to do is line up the arrows with the bottom of the shock cup but truck and trailer must be level and you must come to a gentle stop as to not roll the hitch head forward or backward which will give an inaccurate adjustment. My first trip was about 66 psi but I now have more junk in the front of the trailer. However if your air pressure is not correct you will not enjoy this hitch very much. After four trips with it and putting about 5,000 miles on it I must say I love it. Prior to removing the pin box, I took a measurement from the bottom of the king pin to the ground. 1,803. Four nuts and bolts on each side hold the pin box in place. I needed a 15/16 th socket, torque wrench, and a large 15/16 th wrench. My guess is there will be less maintenance with the Flex-Air, but will it help with chucking as much as the Tri-Glide? Does anyone have the Rota-Flex pin box on there coach? If so are you happy with it? Does it help with chucking? By the way the Flex-Air is about $400 cheaper than the Tri-Glide. Installing the Flex Air Pin Box Removing the old OEM pin box was dead simple with the right tools. The Flex-Air uses the air bag and the Rota-Flex pivoting head.
This would be the replacement for the 1621 you have in your trailer." I can still get the Trailair Tri-Glide online so IĪsked the Lippert rep which would be better and his response was "I would go with the Flex Air since it has less moving parts." I like the idea of the Tri-glide having both the air bag and the rollers. Helps keep the air bag from breaking down. Lippert responded "The Trail Air Tri-glide is no longer available and the replacement is the Flex Air part number 328492. Replace the built-in shock on your Trailair Air Ride or Flex Air fifth-wheel pin box. Does anyone have any experience with the new Flex-Air pin box? I was just about to order a new Trailair Tri-Glide and I decided to contact Lippert and Heartland with my VIN to verify that my box is a 1621HD. GEN-Y GH-8051 Executive Torsion-Flex Rhino Fifth Wheel King Pin Box - 2.5K - 4.5K Pin Weight, 30K Towing Capacity - Check Fitment Chart CURT L05 Air Ride 21K Fifth Wheel Pin Box Internal Airbag with Built-In Strut Reduces Chucking, Jarring, Bounching 21,000 lb.
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