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This is one of the older 150mm drop B1 Reverb Stealths (no graphics around top of stanchion).
Just finished a 600hr full rebuild with new internal seals, IFP and fresh oil (2.5wt Maxima Plush). Initially set the IFP to 50mm and oil height to 191mm per charts I found online for this model, but once installed and bled the post wouldn't drop at all, rock solid when lever pressed. Realising the 50mm IFP height was for newer models I stripped it back down and reset IFP to 30mm for the older models, but still no drop when lever pressed.
Tried a spare lever & hose from another dropper I had laying around and this time the post drops, but only getting 100mm travel. So the first lever & hose wasn't actuating properly, but what could be causing the limited travel? Could the IFP or oil be set to the wrong height? Could the 20mm difference in IFP height cause 50mm of travel reduction?
Looking for other ideas before I attempt another strip down...
I suspect the issue is with the remote/hose/hose bleed, rather than the post.
The most efficient way to test the droppers operation is to remove the hose attachment completely and use the long end of a 4mm hex key to push the actuator thats location inside the Silver base assembly at the bottom of the post.
Great thanks I'll try that. So I guess the lever is pushing oil into the actuator, just not enough of it or enough pressure?
Most likely yes. Â It's a common misconcention the the fluid in the hose goes into the post. The fluid in the post is completely sealed inside the upper stanchion.
These can be such a PITA. The idea of an hydraulic line just to actuate a dropper is silly. Best of luck OP as I hope the parts for servicing were cheap and that it didn't take you too long. If not, I would bin it.