Our unit has 4 slides and 4 knobs. One knob for each slide. The knobs control the flow of hydraulic fluid to each slide. In my case it is very rare to ever use them.
I don't think the OPs issues are hydraulic related. I think one of the 2 rails/mechanisms under the slide or something on one side is binding up.
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2018 Chevy 3500 LTZ Dually Diesel 4x4 CCLB
2011 Montana 3455 SA. 6 point level up. Disc brakes. Curt Q24 Hitch. 5 step glow steps
Progressive EMS. Valterra tank valves. Sailun G637 tires. ARP fridge control. All led lighting. Mor Ryde IS
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