RTV900 Tech Info

The information contained in this article is intended for trouble shooting and is for those with mechanical knowledge. The occurrence of each of these issues is very low and should not lead one to believe that the RTV is a problem laden machine. These trouble shooting procedures can be used to tweak the performance of your RTV and diagnose issues, your local Kubota dealer can provide more detail and specifics pertaining to your particular unit.

 

Problem:
Hard Shifting
Solution:
If the RTV shifts hard or will not go into or out of gear especially on a slope, look at pages 18-19 of the Operator's Manual.  It says to set the park brake then slightly depress the throttle pedal.  This spins the gears inside the transmission and should make it go in and out of gear easier.  If the 4WD lever is hard to shift, turn the steering wheel in both directions to slightly rotate the front differential and driveshaft.

Update: The newer units with the updated speed control lever that reduces the abruptness of the T/M’s (transmission’s) dynamic braking seem to have more problems with the neutral position; that can also lead to this problem. Waiting about 7 seconds after stopping and before shifting ranges will allow the speed control lever time to come back to neutral position.  Adjustments to the linkage and namely the spring tension bolt will help, but if the damper is extremely slow (14+ secs) to return to neutral it may need to be replaced.
 
 
Problem:
RTV engine oil capacity seems wrong
Solution:
It is, The engine oil capacity thta is listed in the Work Shop Manual and Operators Manual is INCORRECT. The proper  oil capacity is as follows:

1) Change oil and replace filter capacity is 3.1 liters or 3.3 qts.
2) Change oil without replacing filter capacity is 2.7 liters or 2.9 qts.

 

Problem:
RTV T/M dynamic braking is a bit extreme
Solution:

The Speed Lever Assy (K7561-42334) will slow the hydro return to neutral so it doesn't stop so suddenly. Since this is a product update and not a safety related issue, it will be at the customer's cost ($14.25). This will be a running change on new units.  I personally believe the old style speed control lever assembly is best but the new is more friendly for those not used to it. 

 Update: K7561-42334/K7561-97421 are the same kit, the first includes instructions.

The new speed control lever assembly is on the right in the images and notice you turn over the damper when installing the new speed control lever assembly.  Also, note on the last photo that the tension bolt should be adjusted to approx. 22mm for proper placement of the spring

Problem:
What block heater will work on this unit? (There is none in the dealer price book)
Solution:
Yes, there is an RTV900 block heater (part no. 70000-17552). It goes in a freeze plug in the back of the head.
 

 
 
Problem:
It seems that the RTV transmission will hesitate at times. Its usually more noticable on an incline and in higher ranges. Feathering the pedal seems to make this happen most easily, punching it should avoid the problem.
Solution:
Check the oil filters, oil quality and if a problem still exists your dealer may need to check the relief pressure in the port block or in extreme cases replace the internal swash plate & port block assemblies. The RTV can be very sensitive to the transmission fluids, Super UDT is recommended.


 
Problem:
RTV900 Windshield with a plastic roof install issues.
Solution:
When installing a windsheild with a plastic roof you must leave the inside roof mount off of the front mounts. Please note: There are two different instruction pages in the instruction manual; one for the steel roof (page 4 of 6), and one for the plastic roof (page 3 of 6). Make sure to follow the proper instruction page in your Installation Manual for type of roof you have on your RTV.

 
Problem:
Bed Latch Too Tight
Solution:
If you find that the bed latch is too tight for customer comfort, we recommend bending the spring wire (K7561-58292) to lessen the force. Be sure to keep enough tension on the bed to avoid bed vibrations.

 
Problem:
4WD Shaft Rattles
Solution:
We have had some reports of the 4WD shaft rattling on the RTV900s. Usually, the u-joint assembly at the transmission end was too loose. Tolerance improvements have been made to this part. Therefore, if you find the front drive shafts rattling due to a loose u-joint, please replace the u-joint assembly (K7561-16820)

Update: Kubota has released a formal fix for this problem. A new clamping universal joint is available that can be replaced under normal warrenty. There will be a production line change for new units. A new universal joint kit can be ordered under part number K7561-91700.

 
 
Problem:
Dynamic Braking Performance Questions
Solution:
We have received complaints that the RTV900's new speed lever assembly is causing the transmission to push the unit forward, even with the brakes applied. Complaints have arisen when the unit needs to be stopped quickly.  Stopping distance was measured with "old" and "new" style speed lever assemblies on the same test machine. Measurements were taken from full speed (hi range) on flat asphalt and down an 8.75% (5 degree) asphalt slope. The test unit was an RTV900G-H, 275 hrs. with no accessories or cargo load. Test Results were as follows:
 

Test Results were as follows:  Results are in feet.  

                                                                        "New Style"                 "Old Style"

Flat Terrain - No Brakes (roll to a stop)               85                          70-75

                        Brakes                                             25                               22

5 degree slope - No Brakes (roll to a stop)       120-125                       115-120

                        Brakes                                             30                               30

 
These tests show no conclusive evidence that either speed lever assembly would cause the transmission to "push" the unit forward while braking. The machine would coast to a stop (under dynamic braking power) further with a "new style" lever, but could be stopped just as fast as an "old style" lever with the brakes if necessary. There was minimal stopping distance difference between 2WD and 4WD.

 

Problem:
How Do You Tow The RTV?
 Technically, the RTV can be towed without damaging the powertrain; just kick it in neutral. We would HIGHLY caution how far and how fast you pull this machine.
 


RTV Reviews, Pictures, Info and Specs

Review The RTV900