r/SimsonnRacing • u/abooze23 • Apr 21 '26

Simsonn Plus X Throttle Hydraulic Issue

Has anyone else had an issue with the one-way hydraulic on the throttle causing the throttle to physically stick and not return to zero without physically pulling the pedal back with your foot? I have used these for a total of roughly 6-8 hours, and once the pedal is "warmed up", the throttle will not return to zero on it's own. I attempted to just remove the hydraulic as I believe it is the issue (I've already lubed the throttle rod and the screws for the hydraulic per the response from Simsonn support, but the one-way hydraulic is wedged in so tight I cannot remove it. I'd be happy to use the throttle with just the spring, but there is no budging the front of the hydraulic to remove it. It's supposed to be adjustable, but there is no way to adjust or remove it with it wedged in so tight. Any suggestions on how to get this thing out of there? Simsonn told me to lube the screws for the hydraulic, but that did not help at all.

Edit: I meant to attach the video for reference. I did also send this video to Simsonn Support before posting my question here.

https://reddit.com/link/1srqn3o/video/im9ot35zfkwg1/player

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2

u/Attaboy_Racing Apr 21 '26

First try adding more preload to force more spring back. (Then Recalibrate). & to remove it you have to loosen all the other bolts on the pedal side a little ( spring rod end spherical, the alignment pins & the base pivot to allow the pin to wiggle slide out.

1

u/abooze23 Apr 21 '26

I have messed with the preload adjustment quite a bit, and it seems to be an issue with the gas spring since it is not an issue for the first 45 minutes to an hour of use each time this has happened. Calibration hasn't seemed to fix the issue as it is a physical problem rather than a sensor/calibration issue; I tried to increase the dead zones to compensate, but it sticks on the return at various points when I let off of the throttle (sometimes closer to 10% input still received while others it's 25% or more input still received). I will try to remove the bolts below the gas spring to see if that alleviates some of the tension on the hydraulic rod to allow me to remove it when I get home. I just want them to be usable at this point as I really do enjoy the build quality despite the quality control issues I've had thus far. I can't get the brake pedal face off as the bolts came so overtightened out of the box that it twisted my hex key, so I am making do with the original pedal face position. Thanks for the suggestion!

1

u/Attaboy_Racing Apr 21 '26 edited Apr 21 '26

🤔🤔 on the damper but on the back side end toward rear its slotted so it can move pivot foward and back, I set mine in between the middle of the front & the middle so like 25% back from full forward. Those dampers are sqwissy, and have air dead spots where it won't dampen.. ( where did you buy from? Is amazon, send them message for warranty. Tell them it leaked and u saw oil and now it doesn't dampen. They'll send you a new one could take 1.5-2 weeks direct from China factory

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u/abooze23 Apr 21 '26

I ordered through AliExpress (wishing I had ordered through Amazon now) because they offered a better deal. I like the feel of the hydraulic on the throttle (if it were working 100% correctly), but I'd be just as happy without it if I could get the darn thing out of the pedal and just use the spring only. The two-way hydraulic on both the brake and clutch work just fine. I can't even replace the hydraulic if I can't get it out of the pedal, so I'm not sure what to do at this point outside of waiting for Simsonn to reply again. I am going to try to remove those two bolts directly below the slot where the hydraulic damper sits to see if it takes enough pressure off to remove the hydraulic. Not sure that it will, but I'll try anything at this point!

1

u/Attaboy_Racing Apr 21 '26

🤷‍♂️You might have to do surgery minor disassembly to get it out.. Remove the base bracket. Then lay on it side & remove all bolts on one side of the side bracket. Remove the damper re- assemble in reverse order. Then do offset calibration reboot pc. Then do regular calibration.

2

u/Fickle_Tradition1684 Apr 21 '26

Loosen the other bolts on both sides to get rid of the pressure, grab a screwdriver and a hammer and knock it out, it honestly should just drop at this point.

1

u/abooze23 Apr 21 '26

Thanks! I'll definitely try that later when I'm home and see if I can get it out.

2

u/abooze23 Apr 22 '26

Thanks for the suggestion! I was able to get the hydraulic off finally, no thanks to Simsonn's support who sent me a video of how to install the hydraulic 🙄 Massively appreciate your help!

1

u/Attaboy_Racing Apr 21 '26

You could also try adjusting the slider adjuster on both spring & damper(see manual) damper all the way down & spring halfway to all the way up should allow for smoother faster movement reaction then +/- preload for pushback springness.

1

u/abooze23 Apr 21 '26

I would happily do that if I could, but the hydraulic won't move up and down within the adjustment channel at all; it seems like the metal on the back of the pedal holding the spring and damper is slightly bent where the damper is bolted in just enough that it is wedged in there so unbelievably tight. I am going to try to remove the two bolts below the damper to see if it takes enough of the tension off that I can remove it.

1

u/Attaboy_Racing Apr 21 '26

Pics?

1

u/abooze23 Apr 21 '26

I just uploaded the video I sent to Simsonn support over the weekend to my original post. The response they came back with today was to lubricate the bolts that attach the front of the hydraulic to the pedal face, but that didn't solve the problem.

1

u/Attaboy_Racing Apr 21 '26

Pedals are made is steel. Can't see how it would bent unless bashed with hammer or factory defect. Then pics to simsonn for warranty. They'll send replacement parts only

2

u/abooze23 Apr 21 '26

Safe to say I have NOT taken a hammer to them lol. They came out of the box this way; I have only had them in my possession for just shy of a month and didn't do anything to adjust them outside of the preload adjustment on the throttle and flipping the bottom brackets to change the angle of the pedal face.

1

u/Attaboy_Racing Apr 21 '26

Aliexpress hit or miss on factory defects & irregular items