Flex Air Pin Box Replacement For A Lippert 1621HD Pin Box

Question

Question:

I am looking to upgrade to the flex air pin box. I have a LCI 1621hd pin box now on my Open Range, 427BH I also have a Demco Highjacker auto sliding hitch in the truck, 18k What Flex air hitch do I need? Part #? Thanks!!

asked by: Jeffrey L

1

Helpful Expert Reply:

The Trailair Flex Air 5th Wheel Pin Box - Lippert 1621 - 18,000lbs Item # LC328492 only has a fitment listing of 1621 but will also fit the 1621HD so it is the correct Flex Air replacement for your current pin box.

expert reply by: Kevin C

1

Answer 1

The main difference between the Curt A-Series part #C24FR and Q-Series part #C97FR is the head and jaw design. The A-Series has dual interlocking jaws which form a much tighter grip on the kingpin than just a standard set that butt up at the end…

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Answer 2

The options you have are as follows; lower the tow vehicle, raise the trailer, or tow nose high. The best option would be to lower the truck a few inches so you can tow the trailer level without raising it more. However, this is going to be the…

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Answer 3

Since trailer manufacturers do not make information like pin box models readily available to the public, you will need to contact the dealership with the serial number and they should be able to tell you what pin box is on it. Otherwise, the only…

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Answer 4

I reached out to my contact at Lippert who was able to give me a spec sheet for the Trailair Flex Air #LC328492. If you check out the picture I attached you can see that from the back of the pin box it measures 19-9/16" down and…

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Answer 5

The Trailair Air Ride 5th Wheel Pin Box #LC328492 that you referenced, which is confirmed to work with the Lippert 1621 pin box on your trailer, features a distance of 21-1/2 inches from the center of the front row of bolts to the center of the…

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Answer 6

I spoke with my contact at Lippert and although she wasn't able to provide me with the center of the king pin to first hole measurement, I do have the back of the mounting plate to center of the king pin measurement for you for the…

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Answer 7

The correct replacement for your Lippert 1621 pin box is in fact The Trailair Flex Air 5th Wheel Pin Box #LC328492 and is rated for 18,000lbs; I did contact Lippert to confirm this, and they agreed this was information was accurate even though your…

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Answer 8

I contacted the Tech Rep at Lippert to verify, yes, the 0719 and 1621 pin boxes are interchangeable. The 1621 pin boxes are approximately 8-3/4" longer than a 0719, bolt patterns matches. You can replace your current 0719 pin box with the…

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Answer 9

I have spoken with my contact at Lippert before for the dimension you need for the #LC328492 that you referenced and the overall height from the top of the mounting bracket to the bottom of the king pin is 19-9/16 inches. You would need to compare…

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Answer 10

I called my contact at Lippert and asked about the Trailair Flex Air 5th Wheel Pin Box, part #LC328492. My contact at Lippert said that if you match the same mounting bolt pattern you have on your existing 1621 pin box, the king pin height on the…

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Answer 11

The Trailair Flex Air 5th Wheel Pin Box #LC328492 that you referenced would not have a shorter or longer distance from the mounting holes to the king pin than the pin box it's designed to replace. This is considered a long pin box which would be…

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Answer 12

Yes, the Trailair Flex Air 5th Wheel Pin Box #LC328492 will fit as a replacement for your Lippert 1621HD pin box. The dimensions of this will be slightly different. The king pin will stick out an additional 3.39 inches and will sit lower (causing the…

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Flex Air Pin Box Replacement For A Lippert 1621HD Pin Box

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