Tandems are stuck.

You can make it work with a pair of needle nose vice grips.

 

But then the driver has to remember to remove them.

Or just use a 2 port valve and cap the line.

 

It will if you use something to keep the push/pull pin out. I use a Phillips screwdriver and wedge it in along the shaft.
Then you can push your trailer valve in to release the trailer brakes and the lock pins will stay retracted.
Then use your trolley valve to lock your brakes up when you are rolling slowly.
It’s worked every time I’ve had tandems that I couldn’t get to slide the normal way.

 

You beat me to it.

Unless they make me drop the wagon I won't slide them unless they come out and say something then I'll play dumb and say oops I forgot

 

Probably not a long-term fix but if there's a driveway that slopes a little steeply from the parking lot to the street, make a turn so the trailer flexes a little when the wheels are uneven(one side of the tandems on the driveway and one side on the street) that will maybe break the tandems loose. That's what I did once and it worked.

 

You guys jamming things in the air release button just taught me how those knobs get broken in half. Haha. I figured it was clowns not smart enough to realize the trailer brakes have to be set and they were trying to pull/pry out the knob with something.

 

This is the first time that I’ve heard grease is bad, lol.
I’ve always used grease, one tube every few months. I apply it to the top and inside of rails with my electric grease gun. Then I use an old fuel glove to smear it around. Never, ever had any problems with crud buildup.
Grease the exposed rear rails, slide the tandem to the rear and grease the forward rails. Then just slide the tandem back and forth a couple times.
The grease won’t build up and attract anything, in fact it will be all washed away in short time.

I also slide my tandem at every pickup and delivery and it always slides effortlessly like a hot knife through butter. Doesn’t matter how much weight is on them, they slide with ease.

The biggest problem for drivers who struggle sliding the tandem is rust and not sliding them often.

 

Teflon pads on the slide rails of the bogey were wore out on my old trailer. Only way was to spray with PB Blaster before loading, sliding them forward, spray rails behind the bogie, slide back spray rails in front. Slide if back and forth. I used the dry lube graphite PB brand, for a while. That’s what supposed to work. Same stuff as dry lube for garage doors. Not as good as liquid, Lot of waste, especially when it’s windy. Doesn’t last any longer, if it’s always tough to slide,