Replacement Pin Box for 2021 Forest River Sandpiper with Trailair Flex Air 5th Wheel Pin Box

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Question:

I have a 2021 Forest River Sandpiper, model 3660MB and would like to know which Lippert 21k Flex Air pin box will fit.

asked by: Tom K

0

Expert Reply:

We need to first determine what type of pin box you currently have on your Sandpiper 5th Wheel Trailer, you will need to locate the part number of the pin box. This number is usually located somewhere on the pin box itself, either on a sticker or stamped into the king pin. If you are unable to find this information, you can also contact the trailer manufacturer with your VIN and they should be able to provide you with this.

The Trailair Flex Air 5th Wheel Pin Box, # LC369535 is a replacement for the Lippert 1621 - 21,000 lbs. pin box.

The Trailair Air Ride 5th Wheel Pin Box, # LC158777 is a replacement for the Lippert 1716.

The Trailair Flex Air 5th Wheel Pin Box, # LC65VR is a replacement for the Lippert Rhino - 21,000 lbs.

expert reply by: Michael R

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Answer 1

I went to our warehouse and measured the holes you mentioned you wanted the measurement for on the Lippert 1621 5th Wheel Pin Box, part #LC1387882. The holes measure 3/8 inch diameter. I have also attached a drawing of this pin box with the…

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Answer 2

If you locked out your Reese Revolution/Sidewinder pin box your Demco Hijacker like the part #DM8550022 would work with it and not require an adapter. The front of a Revolution pin box where the clamps of the Demco would attach is the same as the…

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Answer 3

The height adjustment for the Demco Hijacker Autoslide 5th Wheel Hitch with Slider - Ford Super Duty Prep Package #DM8550024 (18,000 lbs) and #DM8550038 (21,000 lbs) is found in the "Side Rail Assembly Instructions" of the hitch. I have cut…

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Answer 4

To replace the Furrion monitor for the observation camera system on your Forest River trailer, you will need one of the following, depending on the size your older monitor is (there isn't a way for us to know the size of the monitor that…

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Answer 5

Yes the Curt hitch part #E-100 has a towing capacity of 3,500 lbs so it can tow. You'd need to verify that the bumper you install it on as well is rated for towing and stay under the capacity of the bumper as well.

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Answer 6

Thank you for providing those measurements! Since your 5th wheel hitch height is 47 inches, subtracting the bed height of 39 inches gives us the 8 inches you mentioned which is technically the setting you would need to use on your Demco Hijacker…

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Answer 7

Sounds like you are wanting to add a second 7-way to the rear of your 2017 Ford E-450 RV. The easiest way to do that is with the part #41157. This plugs inline with the 7-way already there and then provides you with a second 7-way that is fully…

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Answer 8

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

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Answer 9

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two options.…

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Answer 10

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 11

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 12

Lance does have a proprietary plug, but many customers see a standard 6-way or 7-way round and notice it doesn't fit their factory 7-way as well. I've attached an article to help if you have one of the 7-way or 6-way round connectors which we…

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Replacement Pin Box for 2021 Forest River Sandpiper with Trailair Flex Air 5th Wheel Pin Box

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