Can't feel clicks on 2013 Nytro RTX center shock rebound adjuster

[garcenw]

I recently acquired a 2013 Nytro RTX. I did a search on this issue and found a few threads with the issue expressed, but there was no definitive answer.

There is an issue with the rebound adjuster on the center shock when I tried to adjust it. Starting with the knob turned all the in, as I back out, I feel 2 clicks, then it spins freely for about 1.5 turns. In this 1.5 turn zone, you feel no clicks until you get near the end and then you feel 3 clicks. Is this simply an issue with the detent mechanism and the rebound is still adjustable or is something wrong with the rebound circuit?

Thanks.

- Walt

 

[Turtle]

Have had that before on my Nytro. The metering rod the runs down the inside of the shaft is probably jammed. Fairly common thing on that shock. My shock rebuilder told me the only way to fix it is to replace the shaft.


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[Kkurz]

I had this happen on mine, and sometimes you can get it working if u work some penetrating oil into it. Put some on the shafted and keep moving it back and forth. U may have to put some on and let it work it's way in overnight. Good luck!

 

[garcenw]

Khurz,

This morning, I sprayed some WD-40 on top of the knurled knob and tried to work some between the knob and rubber boot and then spun the knob back and forth a bit. I'll let it sit until I get home from work and see how it goes. Which penetrating oil did you use?

- Walt

 

[Kkurz]

I think I used Moove-it.

 

[garcenw]

I went back and resprayed with some AeroKroil. I'll let it sit.

Even before spraying with oil, the adjustment definately hits travel stops in each direction. I can go a little over 2 turns between travel stops. Are the travel stops working directly on the knob or are they working thru the metering rod? If it's the latter, then the metering rod must be turning.

 

[garcenw]

I don't have a good cross sectional diagram or exploded view of the shock, so I don't know how the knob is attached to the metering rod. When I turn the knob in the direction of less rebound, the knob moves upwards which seems to indicate that the shaft is seized and the knob is just "unscrewing" from the metering shaft. It will move upwards enough to hit the plastic bushing/spacers. What I felt as detents in the extreme loose direction was the knurls hitting the plastic bushings. In the other direction there are mechanical detents that feel like a ball detent. I guess the knob is moving down onto the ball detent mechanism in that instance. I guess the shaft is stuck and disassembly is the only to fix it.

Has anyone out there had this shock apart and can offer some advice? I have the service manual on order, but I suspect it won't cover shock disassembly to that level as the parts fiche doesn't break the shock down that far.

 

[Kkurz]

When I got my sled it was used and one of the rods was seized. I had them serviced and the guy warned me that they are prone to it and to move them whenever I think of it. You can imagine it's a pretty tough environment down in the skid frame. Constantly freezing and thawing and being showered with snow, water, grit, and even road salt has to have an effect on longevity. Good luck!

 

[garcenw]

Khurz,

Yep, there is a rubber seal on the bottom, but nothing on top of the knob. I can see how water/salt can get past the knob and into the slot where the detent ball is. At that point, the water has no where to go but down into the shaft. Who did your shock rebuild? Were you pleased with the results?

 

[Kkurz]

I used a guy locally. Excellerated Technology in Buckhorn. He's amazing and the shocks work great. I doubt it would be feasible for you to use him though.