Cab mount replacement

When installing a new cab mount, how precise does the placement need to be for everything to line up? Do I just loosen the 3 nuts, jack up my collapsed cab (currently resting on the frame), grind off the old mount, and weld the new one on and rebolt?

Also I am cleaning up the frame and welding Safe-T Caps over a good portion of the frame at the same time I do this.

Just got the OEM part today, but for some reason it’s prepainted (poorly, already flaking off and drips and runs in the coating). Why on earth would they prepaint it knowing it has to be welded on?

 

A rusty cab mount, quite honestly, is the least of your worries.

 

see if your finger can poke through that frame.

 

Thanks for the helpful replies. (sarcasm). Anyone who actually has useful input? It's mostly a beater work truck anyway.

The flaking you see is mostly the undercoating. A lot of the rust is surface rust. Hammered on the frame and it's quite solid. After scraping the undercoat off, and grinding down the finish in one spot, it's pretty clean metal.

 

they probably prepainted it just to keep it from rusting up from creation to delivery in the customers hands. so its not intended to be the final paint on the piece, just something to prevent rust till you weld it on.

 

Grind a little bit of that scaly stuff off and see how thick it is.

I know you think everyone here is an asshole for making the suggestions that have been given, but we see it all the time on here. Someone wants to do something to a truck thats too far gone rust wise. Were just looking out for you.

 

unless OP would rather a rusted part that was sitting in the warehouse..

 

I'd attach the cab mount to the body, with the other cab mounts at least snugged to their mounts, and tack it in place. Then lift the cab and finish welding it.

Of course, I'd also have some measurements to compare to the placement of the old mount just for a sanity check. It's rubber mounted, so placement is not super critical. If it's a little off, might cause the rubber to wear prematurely, but not much other impact.

 

I have received rusty parts straight from Toyota. Mainly the interior pieces behind the dash that were never painted for some reason.

 

that is a good question!

what kind of undercoating is that or do you know?

 

Well, to me, it would make a bajillion times more sense to just oil the bare metal to keep rust away. Degreasing is a lot faster and less work than sanding the finish off

Seems like some kind of rubberized asphalt coating. Comes off pretty easily with a scraper

 

Are you replacing the complete mount Top and Bottom??

Both sides or just one?

What I do and works for me is do the prep work.

Since each one is always different depending how much other metal is replaced .

Once all the other work is done the Top and Bottom are tacked in place Bushings and Bolt installed making any adjustments .

Where it can get interesting is matching a different cab to a different frame

Everyone finds what works best for them

 

I'm just doing the one bracket for now, but may do the other ones in the future if it goes smoothly. The OEM part cost me about $150CAD from the stealership though, so I'm in no rush to hand out that kinda money unless I need to.

Does anyone know if the top lip that aligns the bracket to the frame is welded on? I mean I won't be able to access that area to weld anyway with the cab on, but I'm wondering if the existing one is welded at that point, or if it's just welded up the sides and on the bottom. If it's welded on the top lip, I might have a hard time removing the old one, having to grind that top part off with a Dremel or something with the cab in the way.

I'm reusing the POS bushing for now, but next spring I will probably replace all 4 bushings.