Beer & a friend.... (Food & a friend works usually just as good)

I’d recommend having a friend help you lift it & give them a six pack for helping you. Indiana & Sallah style over the threshold...
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On amazon / Home Depot they sell this:

“EZ-Access Transitions Modular Aluminum Entry Ramp”

https://www.amazon.com/dp/B00ULAZQQ2/ref=cm_sw_r_cp_awdb_imm_BEFKSBDR1M4QSE55Q2C3
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You started a thread on how to lift something heavy over a bump? Seriously ??? Give me a break.

I have some boards cut the width of the door. They are different thicknesses and widths. I stack them to make a small ramp. This eliminated the side load on the threshold.
PS- I think it is a totally valid question you are asking.

Very good question and one I too struggled with at first at my old house with sliding glass doors. I ended up cutting filler strips of hardwood Oak that were just a little higher then highest ridge on the track. This includes one strip in front of the inside ridge. Then use a few more boards at different thickness to taper off like a ramp. Same as what @ryan1234. You can buy them in different thickness and sizes at just about any hardware store. Then have a piece of plate steel I heated and bent go on top of this. You don't want to make it just enough to make a speed bump. You want to stretch it out to about 1.5 feet on both sides. It's a bit of work but once you are done you will always have it. I have a large collection and went through a lot of games so was worth taking the time to make it right. PS I also move my games by myself so easier the better. At my new house I have an regular entrance door. Ending up just cementing a small ramp in front of the door. Forgot to say I also cut the wall out to put in a 36" door. The 32" door was too narrow.
Another way would be to build a cart with inflated wheels to go under your pinball lift. The inflated wheels go over stuff better then the hard wheels on the lift does.

I have always just lifted the front two wheels over the threshold, pull the cart forward then lift the back two wheels. Never an issue with damage to the door track.

Build a mini ramp or a ramp for either side. I made a ramp for a 1 step drop into my storage, eliminating the need for a helper.

Exactly!

I'm jealous at how easy you have it. Getting games into my home involves removing the head, and navigating a very tight, steep stairwell. And that's after removing the doors, door trim, stairway railing, etc. It requires 2 strong people, and the person on the bottom is literally holding more than half of the weight of the game for the entire journey down the stairwell. It's brutal.

Would pneumatic wheels be an option?

Shouldn't you be busy making horrendously ugly, overpriced shooter knobs?

Yeah, or maybe even a dowel between the threshold and the center track?

That or a small aluminum dock plate.

LTG : )

For God's sake, put a rug on the concrete and move the pin to the threshold, place silicone furniture sliders under the farthest away legs and lift the closet legs over the threshold, place sliders under those legs and lift the legs outside the house over the threshold, voila-5 minutes and done.

Buy a proper pinball cart, put the big rubber wheels on it, found in one of the Wico Cart threads, boom. Cart goes over EVERYTHING, all terrain!

It isn't the going over that is the problem. It's the damage done to the threshold going over. It bends into an unusable door sliding shape easily.

LTG : )

Looking like someone’s trying out their brand new Kubota. Nice choice, you’ll love the enclosed cab.

Cut a strip if wood the size of the channel and drop it in place prior to moving games. It should be about same height if not a bit higher.

With the big rubber wheels it won’t bend, the wheel will flex over the threshold unlike the tiny hard wheels now.