Bachmann BNSF#3002

[Jyuma]

I think I screwed up.  I took my Bachmann BNSF #3002 (item# 60305) apart some time ago to replace the motor, which went fine without a hitch.  Unfortunately, I forgot how the trucks connect to the chassis.
I don't see any way to hold the trucks in.

I attached a photo of one of the trucks.  The top of the truck is shaped to fit onto a bulge in the chassis, but I don't see any way to keep it there.

You cannot view this attachment.

Any Ideas?

Thanks

[Terry Toenges]

I don't know if it's the same on your GP40 but on some F7's, they are held in by a screw at the top. There would a hole in the top of the frame where the screw goes to screw into the truck.

[Len]

As Terry says, and the exploded diagram shows, a screw comes down through the upper frame/weight piece to hold the truck in place. Exploded diagram:
https://www.bachmanntrains.com/home-usa/dwg/dwgs/HOEMDGP40(DCCEQUIPPED).pdf

This is true for all versions of the GP40, with or without DCC and sound.

Len

[Jyuma]

Thank you both so much... especially for the exploded view.  I looked all over the place for that exploded view, but I could never find one.  Thanks again.

Now I need to find those 2 missing screws.   

Strange, I looked inside the hole in the plastic truck mount, under extreme magnification, but didn't see any witness threads.  Maybe they're more like an interference fit, something like a rivet nail, rather than an actual threaded bolt.

I'm very grateful to both of you for your help. 

[Len]

Exploded diagrams, and other useful information, can be found here:
https://www.bachmanntrains.com/home-usa/references.php

Len

[Terry Toenges]

It's a threaded screw. If it was just a peg type thing, it might be possible for the trucks to fall off when you picked it up.