RTV900 strong idle, weak in gear

[Pj423]

I have a RTV 900 that was passed down to me from my dad. He had it for a few year and it was so strong! It overheated so we put a new head in it! Ran perfect for a few months and now it idles very strong I step on the throttle when in neutral and it sounds strong! As soon as I put it in gear and step on the throttle even a little it barely moves and sounds and feels weak to the point that it turns off! If I barely step on the throttle it’ll move but it will not go up even a slight incline sometimes and turn off. //What I have done so far
*sent the injectors to a shop to get tested and they are fine
*new fuel filter
*new head and gasket
*Transmission level corrected
*new mechanical lift pump
What hasn’t been done in at least the past 5 years is a change of the 2 hydraulic filters!

 

[Semper-Fi]

I have a RTV 900 that was passed down to me from my dad. He had it for a few year and it was so strong! It overheated so we put a new head in it! Ran perfect for a few months and now it idles very strong I step on the throttle when in neutral and it sounds strong! As soon as I put it in gear and step on the throttle even a little it barely moves and sounds and feels weak to the point that it turns off! If I barely step on the throttle it’ll move but it will not go up even a slight incline sometimes and turn off. //What I have done so far
*sent the injectors to a shop to get tested and they are fine
*new fuel filter
*new head and gasket
*Transmission level corrected
*new mechanical lift pump
What hasn’t been done in at least the past 5 years is a change of the 2 hydraulic filters!

Change the existing trans filters with Kubota approved filters. Then change the trans with Kubota Super UDT fluid. Probably will be the less costly first move. Good luck.

 

[aurthuritis]

you need to identify if this is a transmission problem or an engine problem. but check your brake linkeages real good cause this could be dragging brakes. has happened more than a few times

 

[Pj423]

So I called kubota dealer and they said to start with the transmission filters so I did that today and found this in the white suction filter

 

[Pj423]

you need to identify if this is a transmission problem or an engine problem. but check your brake linkeages real good cause this could be dragging brakes. has happened more than a few times

Transmission problem I guess

 

[Pj423]

Change the existing trans filters with Kubota approved filters. Then change the trans with Kubota Super UDT fluid. Probably will be the less costly first move. Good luck.

I did and check out what I found in the suction filter

 

[aurthuritis]

cut the filter open and see what else you find. remember that is the suction filter. cut open the hst filter to see of it has bearings in it?

 

[Pj423]

cut the filter open and see what else you find. remember that is the suction filter. cut open the hst filter to see of it has bearings in it?

I know that its a suction filter but I’m not sure what it does exactly lol I’ll cut the suction filter tomorrow because I do still hear things in there and the hyst filter the yellow one is clean I don’t see anything or hear anything in it..

 

[aurthuritis]

i will have to start listening to my filters.

 

[geohorn]

In Post #1you stated that in neutral the engine revs-up fine, but in “gear” the vehicle barely moves.
Keep in mind that the foot-pedal in a RTV is NOT an “accelerator” in the traditional sense. (although behaves that way when in Neutral.)
The foot pedal is a transmission HST CONTROL which selects swash-plate movement. The engine speed follows only to support that desired/requested transmisison-speed.
What you describe appears to be a healthy engine….and a troubled transmission.…. possibly a linkage issue, but more likely a transmission-fluid related matter. Your filters may be clogged…. and they MAY be clogged with failed transmisison-parts. Getting the filters opened-up and viewing the contents is probably your next best move.

Here’s hoping they are only filled with dirt and not transmission parts.

 

[Pj423]

In Post #1you stated that in neutral the engine revs-up fine, but in “gear” the vehicle barely moves.
Keep in mind that the foot-pedal in a RTV is NOT an “accelerator” in the traditional sense. (although behaves that way when in Neutral.)
The foot pedal is a transmission HST CONTROL which selects swash-plate movement. The engine speed follows only to support that desired/requested transmisison-speed.
What you describe appears to be a healthy engine….and a troubled transmission.…. possibly a linkage issue, but more likely a transmission-fluid related matter. Your filters may be clogged…. and they MAY be clogged with failed transmisison-parts. Getting the filters opened-up and viewing the contents is probably your next best move.

Here’s hoping they are only filled with dirt and not transmission parts.