aurthuritis
Well-known member
i want to see that huge grin on your face when this all works out ok. congratulations and Thank You for taking us along the journey. much was learned.
Kubota RTV 900 transmission problem - hardley moves in gear!
- Thread starter PACKASAURAS
- Start date
aurthuritis
Well-known member
How did it all work out???
Sorry for the delay...i need to investigate why i am not getting alerts from your messages! Been caught up with various things limiting progress...however machine still jacked up. Was working on it tonight trying to sort out creep. I used the neutral screw on the piston to stop creep on drive and all appears well. A few blips on the accelerator and getting instant response and speedo going above 25mph. Waiting for fluid from dealer to top up tipper reservoir and hst. Also replacing a seal on the front drive shaft, then put tipper back on and test drive 
aurthuritis
Well-known member
yes that screw on the servo piston is to adjust the piston back and forth in order to center the swash plate into a neutral position. then adjust the speed lever to max travel. to adjust correctly you need to have a set of gauges to set the neutral and speed levers correctly.
Email from this server is being blocked by gmail and since gmail blocks it I've found many other sites follow their lead. So if not getting notices it is most likely not your fault. Wish I could say there is a solution on the horizon but unfortunately that is not the case. My apologies.Sorry for the delay...i need to investigate why i am not getting alerts from your messages! Been caught up with various things limiting progress...however machine still jacked up. Was working on it tonight trying to sort out creep. I used the neutral screw on the piston to stop creep on drive and all appears well. A few blips on the accelerator and getting instant response and speedo going above 25mph. Waiting for fluid from dealer to top up tipper reservoir and hst. Also replacing a seal on the front drive shaft, then put tipper back on and test drive
Thanks very much for all of your help...it has been a steep learning curve, cost me alot of time....but saved me alot of money!!....if doing it again I could probably half my time...but I guess thats how it goes!! A few finishing touches to go but pleased with results so far. Hopefully my trail/experience will help others problem solve/fix their RTV 900s, especially those looking to replace the inner swash plate with guide!! I am a hotmail user and was getting notifications previously but not anymore for some reason. Thanks again for all of your time and contributions 
aurthuritis
Well-known member
not that common. but before you tear into the transmission make sure your spark arrestor is clean or removed and also make sure the engine it turning 3600 rpm at full throttle. then kake sure your peddle is traveling far enough to get full stroke on the servo lever and throttle speed control lever at full peddle.
Done the checks and adjustments on half a dozen other forum posts. Including removing spark arrestor. Brake check. Engine runs as any other of the rtvs I've driven. Without a frame of reference servo lever I can only show pictures. I attached or tried to attach 2 pictures, one is servo arm at idle and the other is 100% throttle.
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aurthuritis
Well-known member
when you push the peddle all the way against the stop does the throttle lever come against the stop screw? when was the trans oil last changed? filters and oil are original Kubota? have you checked the fill level in the tank? what did you find?
Fluid and filters are less than 100 hrs old and is almost to the top mark. Throttle stop is touching attached are pics of it one of those is from the pedel and the other is bypassing everything. I've driven more than a few of these things in the past 15 years and know how they drive basically brand-new. There's no outside adjustments that I have checked and have had any improvement on speed. This has been an issue for 4-5 years since I bought it. I'm not kidding about the outside adjustments. I have checked every damn one, even the servo adjustment screw was adjusted. I will build a pressure tester if you think it's going to help. I've tried to borrow one from the local Kubota, but it must have been gold plated and diamond encrusted. I will not do business with them ever, only thing I got was "change out the hst" from them. They didn't want to try anything else to fix it.
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aurthuritis
Well-known member
not doubting your competence just base lining. if you feel confident that the engine is running 3600 rpm and the exhaust is clear and everything is adjusted, the only other problems could be a collapsing suction hose or warped scratched valve plates and then valve body. have you checked the charge pressure ?
aurthuritis
Well-known member
it sure helps i you know the pressures. leaks can be from wear or a malfunctioning bypass
aurthuritis
Well-known member
for the charge pressure you will need another gauge much smaller values. i strongly suggest that you get on ebay and get an original factory service manual and not a copy. or just order one from Messiks.
aurthuritis
Well-known member
that looks like a wsm. but i can't opinion on if it is complete enough. the pressures are listed in the wsm. i don't have a copy for your model.
aurthuritis
Well-known member
you need the page that gives you test pressures and rpm