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Central Illinois | Have a 2004 2388 Case Combine with 2200 hours on it that I purchased used. I've owner this machine for 5 years now. This Combine will lose speed going down the road and when you come to a small incline it loses speed to the point that it is only going 12 mph. I was told by the Dealer that they have 2 different transmissions in these, one for 30.5x32 tires and one for 20.8x42 tires, which are the tires I have on this machine. Two years ago the Dealer told me it was the hydro pump was bad so I replaced it and that made no difference in performance. I have also replaced the inch pedal needle and seat that same year. This year I pulled out the transmission and replaced the gears from the 35x37 to the 34x38 which the Dealer said was the problem, because it was geared to high. So as long as I had the transmission out I had the hydro motor on the side of transmission rebuilt. Got the machine all put back together and still have the same problem. Has anybody ever experience this problem? I am out of ideas, so any help would be greatly appreciated. Forgot to mention that this Combine also has rear assist on it, now wondering if that would cause this issue. Thank you. |
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SC Illinois | . |
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| If the rear assist is engaged it will make it go slow, but it should be roughly the same going up hill. Shouldn't slow down significantly, would just be slow all the time.
Almost sounds like a relief valve bypassing under lower than normal pressure.
Edited by thefarmers 8/16/2017 17:02
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Basile, Louisiana | I've had the same problems with my 2388 3 years ago. I would check and make sure your inching pedal is not hanging up and/or seizing. Under the cab there's a spring that pulls the inching pedal back. The spring was good but the inching pedal was seize sing to the shaft it pivots on. That was part of my problem. Have the pressures checked at the hydro pump, that will tell you also if your inching pedal is sticking and/or a bad hydro pump. |
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| I have noticed this also on our 2004 2388 but have never really looked into the issue as dont have many hills on roadways to climb an have never noticed in field operations.. u must have 15$k into trying fix with nothing done very frustrating |
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Central Illinois | Ok thanks if I remember correctly it was making 6500 psi. After replacing the hydro pump. I will check inch pedal. |
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SE SD | watching I've got the same problem |
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Central Illinois | Do you by chance have a mud hog system on yours. AR |
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| Yes we do also mudhog but when shifted to 3rd gear it disengages the rwa |
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Trivoli, Illinois | Another thing to check is to make sure that you are getting the full travel out of your hydrostat lever. I adjusted mine last year. On the end of the cable that goes from your hydrostat lever to the hydrostat intself is a fork that you can rotate to increase travel or decrease travel. I rotated mine to far at first because when i put the hydro level in the neutral position it wanted to creep forward while on a flat surface. So i adjusted it back a turn at a time until it would sit still while in the neutral position. After doing this i was able to pick up about 2 mph on my top speed. |
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| That can be bypassed....if he bought it used, you never know. But still would be slow all the time, not just up hill. |
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Central ND | I have no experience with the issue you have got, but those systems havs to have some sort of bypass for the oil pressure to orveride as to smooth out the jerking and avoid dead ending of the load/ engine when you slam, the hydro forward or overload the engine....and doing damage to the pressure system. There has to be some valves and springs/ one for forward and one for reverse that can be switched around to test for weak springs and premature bypassing.....(seems to me Jon Hagen?? once told me about troubleshooting this issue?).Or amybe somene else can chime in with some tips. |
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SW Wisconsin | * watching |
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Central Illinois | Had same problem on our 2388 but don't have rwa. Believe we changed hydro filters, had pressures checked (which were ok), & adjusted hydro cable to get more lever going forward and it made it better. Ours has the two speed and with a full tank of corn you cant take off from a dead stop if its engaged. |
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Hudson, South Dakota | I have a 06 2388 had since new same deal cant pull itself up any kind of hill with out losing half your speed. If I try to pull a pickup or header behind you have to shift down to second gear for any kind of hill. |
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SE SD | No mud hog. Mine is actually a 1997 2188 |
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Hagen Brothers farms,Goodrich ND | School Of Hard Knock - 8/16/2017 22:36
I have no experience with the issue you have got, but those systems havs to have some sort of bypass for the oil pressure to orveride as to smooth out the jerking and avoid dead ending of the load/ engine when you slam, the hydro forward or overload the engine....and doing damage to the pressure system. There has to be some valves and springs/ one for forward and one for reverse that can be switched around to test for weak springs and premature bypassing.....(seems to me Jon Hagen?? once told me about troubleshooting this issue?).Or amybe somene else can chime in with some tips.
On the old 14 series, you have pressure relief cartridges where the hyd lines attach to the hyd motor. Two cartridges, one for forward, another for reverse. When they fail, you can have weak / no forward or reverse. If switching the cartridge position moves the problem to the other direction, it points to a failed cartridge. A failed or out of adjustment inching pedal internal spring which is what limits drive system pressure, can make for weak drive hydraulics and lack of speed. Also as suggested by another, a worn or out of adjustment speed / direction control arm where the control cable attaches to the hydro pump, can cause lower than normal speed. |
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2388 combine problem
