Kubota RTV 900 transmission problem - hardley moves in gear!

if you don't have a tachometer then it won't hurt anything to go ahead and give it some more fuel anyway and then test again. you won't overspeed anything but might get a little smoke. i have a sneaking suspicion that this is your problem and not transmission related.
 
dmatlock2 said:
Stall was done to get my measurements for high pressure on port 2. That's a symptom of my problem, it doesn't like to go uphill and stalls on even a slight incline. Charge pressure is in spec at maximum rpm. At 44°C I get 65 psi when idle and 110psi at maximum.
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that is good news.
 
aurthuritis said:
we are missing two important pieces of the puzzle. an accurate reading of no load and stall RPM.
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Can't stall it.

Test condition: engine at idle, servo disconnected from throttle linkage. Transmission is in high gear, parking brake is applied. The dump bed is sitting off to the side.

I manually moved the servo lever so as to try to stall the IDLE engine and it won't stall. High pressure side would go up to 2200 ish as I pushed the servo lever. No amount of throttle manipulation changed anything until near maximum throttle. At near maximum throttle the pressure would finally start to get closer to 3000 psi. You still thinking that I have a engine problem? The video don't match my problem. The engine has never bogged down.
 
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aurthuritis said:
if you don't have a tachometer then it won't hurt anything to go ahead and give it some more fuel anyway and then test again. you won't overspeed anything but might get a little smoke. i have a sneaking suspicion that this is your problem and not transmission related.
Click to expand...

I have a sneaking suspicion that had it just been low on power that I would never have owned it. It would have been kept by the previous owner.
 
it is your call. get a tachometer so you can measure the rpm or try to adjust the fuel and see what happens. we aren't even sure it is achieving proper rpm at no load.
 
working from your old numbers you are getting aprox 1.58 psi per rpm at idle. if we assume the rpm isn't changing much at stall then you would be getting aprox 1.06 psi per rpm at stall. but it will be interesting to see what the actual numbers tell us.
 
nope. lost 400 rpm. but i expected to loose some.

if you do the math and add rpm your pressures would be in spec. if i were you i would proceed with adjusting the fuel up some. does your engine have any blow by? are valves adjusted?
 
be advised. don't adjust your rpm. you need to add fuel. i think your governor is calling for more fuel to maintain rpm but the fuel rack screw is adjusted to a to low of setting so the engine is experiencing to much droop.
 
your droop shouldn't be much more that about 95 rpm considering your max no load is 3800 rpm. so a 400 rpm droop is excessive.
 
Redid the RPM calculations, they were slightly off, 3523 RPM loaded. 3582 unloaded. I may have held the tach incorrectly. 400 loss is incorrect.
 
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