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-   -   8120 Header lifts very slow (https://www.thecombineforum.com/forums/7-case-ih/272818-8120-header-lifts-very-slow.html)

sjf 08-24-2016 10:03 PM

8120 Header lifts very slow
 
Hi we have an 8120 that the header lifts VERY slow and the reel barely turns. The dealer says they have not seen this before and we have tried all their suggestions as they cant get out here till monday. Any ideas? Everything else works fine and all the hydraulic setting are correct. thanks

Justaguy 08-25-2016 03:22 AM

What works and what function doesnt? You've checked pressure. What is it? Thanks

Jeff-C-IL 08-25-2016 10:33 AM

If all functions are slow, sounds like the main suction line is plugged. Or a master filter. WEird.

sjf 08-25-2016 02:46 PM

The only functions that are slow are the header lift and reel speed. Everything else runs perfect.

cihmech 08-25-2016 09:40 PM

In pro 600/700 monitor go to toolbox and scroll through head 1 and head 2. Make sure everything looks correct for header. There is a module on header that tells machine what header is installed. Next does your manual header height work? When raising and lowering does percentage change? Have you calibrated feeder position?

sjf 08-25-2016 10:18 PM

Yes everything works. The dealer combine guy just checked all the pressures and had all the valves etc out and everything looked good. Voltage is good. He is stumped. The only thing that he did check was the flow (gpm) It all all worked good when it was parked last fall

cihmech 08-25-2016 10:34 PM

Is the header the same from last fall? I worked on a 8010 that the customer bought a 40' macdon and the raise was slow. I put a gauge at cylinder and was reading 3000 psi. Header was too heavy. He bought the bigger cylinders and up it went. I had a machine that was slow to raise and lower. That one the manual header height was reading 100% all the time because sensor wasnt mounted. Header raise, reel drive, unloader swing, steering ,reel up down fore aft, all come off the piston pump. The only thing not working out of those are raise and reel speed?

sjf 08-25-2016 11:15 PM

Yes same header. Yes those are the only things. Fore n aft, reel lift, auger swing all fine Yes the height sensor works

cihmech 08-25-2016 11:21 PM

Good luck I hope your tech finds it. Please post what fixes it.

Justaguy 08-25-2016 11:49 PM

Ok. With those two symptoms I would check for a stuck signal check in the reel valve on the side of the feeder house. It can become loose in the bore and the pump won't stroke into full flow because it's not getting the full signal back. Do you also have poor steering?


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