Pin Box Replacement Based On Manufacturer And Measurements

Updated 07/26/2017 | Published 07/24/2017

Question:

i have a 2014 heartland landmark 5th wheel, and my truck is a 2013 chevy 3500 single wheel with the standard box. i think i got the lippert 1621 pin box, will the RP94720 work for me?

asked by: David P

Expert Reply:

The Lippert 1621 pin box is a very common pin box for your Heartland Landmark 5th wheel trailer. The Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter - Lippert 1621 - 20,000 lbs # RP85FR will work great to replace a Lippert 1621 pin box.

Since your numbers are difficult to decipher, I recommend measuring to confirm. I've attached an article to help you with the measurements to confirm a fit but will give you the measurements as well.

If you have the Lippert 1621 pin box, your measurements will be:
Horizontal---7-7/8 inches bolt center to bolt center
Vertical---2 inches bolt center to bolt center
Bolt Size is 5/8 inch
Bolt Head Size is 15/16 inch
There are 6 bolts per side
The front row of bolts to center of king pin is 17-3/4 inches
The back row of bolts to center of king pin is 25-5/8 inches
And finally the pin box measures 12 inches wide