Installation Of Replacement Air Spring On Trailair Air Ride Fifth Wheel Pin Box

Question

Question:

My air spring no longer will maintain pressure. I see there is a replacement part but cant find a how to video. Can you help?

asked by: Bob M

1

Helpful Expert Reply:

I called my contact at Lippert and although we do not have an installation video I was able to find the instructions that explain how to install a replacement air spring like part # LC156622.

You would need to do the following per the instructions:
The bag is fastened at the bottom first by inserting the carriage bolt in the key hole shape opening on the lower plate allowing the bolt head to slide in and be pulled forward securing the bag in place. Secure air bag with the air fill fitting in the up position with 2 locking nuts, not exceeding 20 ft/lb torque on the top plate of the air bag. Install air fitting using Teflon tape or pipe sealing compound. Install the shock absorber using the longer bolts with locking nut. Tighten nuts to 60 ft/lb.

expert reply by: Jeffrey L

1

Answer 1

Ultra Fab has stated that usable air pressures can range from 20 to 120 psi. According to Ultra Fab there are many factors that can effect air pressure such as the size of the air spring in diameter and height, the pin weight of the trailer, the…

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Answer 2

Here are the brake bleeding instructions directly from the manual for the Hydrastar Actuator #HBA16. This process needs to be followed to ensure you do not damage the actuator. BLEEDING AND ADJUSTING THE BRAKES 1. It typically is much easier to bleed…

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Answer 3

The HydraStar Disc Brake Kit w/ Actuator for Triple Axle Trailers - 13" Hub/Rotor - 8 on 6-1/2 - 7K #HYD54FR comes with all of the brake lines needed to install this kit on your 2017 Heartland Road Warrior 413, so you don't need any…

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Answer 4

I spoke with my contact at Trailair and from your serial number we were able to determine that your trailer came with a 1621 HD pin box which is a long pin box style. I was unable to obtain the exact part number for your Trailair pin box but from the…

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Answer 5

Because it's lighter, less expensive, has fewer moving parts and is mechanically less complicated I'd recommend going with the Gen-Y #325-GH-8040 shock absorbing pin box versus a Trailair Flex Air like part #LC328492. The Trailair features a…

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Answer 6

Great question, Jeff! When the Rota-Flex first came out it renovated what a pin box could do and be, but at this point in time that technology is a little more dated and the Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box #325-GH-8040 is the "new…

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Answer 7

When using a Trailair Air Ride Pin Box, like part #LC158778 that you referenced, you should inflate the air bag to the line on the shock once it has been connected to your 5th wheel hitch. I have attached a review video where you can see this process…

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Answer 8

There should be a sticker or plate on the pin box itself that lists the manufacturer and model of the pin box. If it is not present then there are some measurements you can take to determine the model of the pin box. I have included a link that…

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Answer 9

Trailair Flex Air 5th Wheel Pin Boxes, such as the Lippert #LC328492, are designed to replace the existing pin box on your trailer. The long and short jaw models that you referenced in your question simply refer to the type of pin box that the unit…

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Answer 10

I am sorry Lippert did not include their instructions with your Lippert Trailair Air Ride 5th Wheel Pin Box #LC158778 but I have included a link to them on the Lippert website. I also linked an image of page 3 from those instructions which shows the…

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Installation Of Replacement Air Spring On Trailair Air Ride Fifth Wheel Pin Box

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