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Discussion Starter #1
Well, we got about 4 acres done today with the 9600 today before we lost all steering ability and got the dummy light for low seperator pressure. We took it to the dealer for the pre-season checks and obviously your not gonna be able to tell this would happen just by routine checks.

Anyway the dealer said the gear probably snapped on the hydraulic pump. We had our neighbor come out and look at it since the dealer was closing up shop and they'll be out in about an hour to start fixing it and he thought it was the smaller pump that controls those functions.

If you know the hydraulic setup of a 9000 series, there's a PTO shaft gonig into a large pump, we're 98% sure thats just for hydrostat controlls because of the large 2" hoses running towards the front of the combine before we lost them behind shields, pulleys, etc.

Behind the large cylinder, thats the back most part of the pump, there is a smaller pump that also has a main feed line off the hydraulic resovoir and has lines running to 4 different locations. our neighbor said the copper bushing/gasket gets worn down pretty easily and allows fluid to leak through and not hold pressure and he's pretty sure thats the problem.

So is the seperator pressure a problem with the large pump, or the small pump thats bolted at the backend of the large pump?


Thanks,
Dave
 

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Re: 9600...low sep. pressure/steering....inside pl

I ~believe~ that the large pump is responsible for sep. pressure. I have always heard it called the "charge pump", and have also heard that if it really thrashes, you're out quite the chunk of change!

Before this happened, did you ever notice your oil level (of your charge pump) (on the dipstick) rising?
 

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Re: 9600...low sep. pressure/steering....inside pl

The steering/engine gearcase pump goes to the steering valve that has priority and then it goes thur the gearcase filter to the engine gearcase to supply oil to the lubrication, engaging the seperator and engaging the unloading auger.
 

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Re: 9600...low sep. pressure/steering....inside pl

There is 4 pumps-piggybacked on to engine gearcase [in order]hydro pump then charge pump then main hyd pump and steering pump --NOTE main and steering pump is one component but two pumps--------steering pump supplies engine gearcase and sep presurres------the main hyd and steering pump are bad for failing along with draining engine gearcase oil to main reservoir or vice versa
 

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Re: 9600...low sep. pressure/steering....inside pl

well we lucked out...after cleaning all the chopped corn leaves off the back axle we discovered our spreader lines that rest on top of the steering lines, over the past 10years, rubbed the steering lines down so much they leaked...

Quick trip to the shop to make new ones and we were set!
 
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