Another compatibility question, please......

[Duff 206]

Good evening, gents!

If I were to try to put a 520 forward-swept axle onto a 400-series frame, what would I need to adapt in terms of steering? Probably longer tie rods which I can fab, but does it change the steering geometry coming off the steering shaft? I know the spindles are completely different between the 300/400's and the 500's (1").

And what size is the axle pivot/mounting pin on the 500-series? 3/4" same as the 300-400 series?

Thanks much in advance for any info!

Duff :thumbs:

[TT-(Moderator) 1,162]

The bolster pin and the distance between the axle mounting plates are the same.

The tie rods for the FSA use automotive-style greaseable ball joint ends and the lower steering shaft is built specifically for proper attachment of those larger ends.

You have the choice of adding to / altering the tie rod attachment plate on the non-FSA lower steering shaft, or you can search for the lss for a pre-'91 520 with the FSA.

[sorekiwi 761]

Here is another thread from the last week or so that will give you the same info that Terry just gave you!!

http://www.wheelhorseforum.com/index.php/topic/31552-axle-swap/

[Duff 206]

Thanks, Mike and Terry! Been really busy and not following the forum as closely as I usually do so I had missed the thread from last week- very good info, and thanks much to all!

Duff :thumbs: