5 Most Common Kubota RTV X1100C Problems and Effective Fixes

Kubota RTV X1100Cs have hydrostatic transmissions and hardly stall, unlike most utility cars with belt-drive CVTs. However, even the best vehicles malfunction sometimes. So, what are the most frequent Kubota RTV X1100C issues? The most common Kubota RTV X1100C problems are transmission problems, starting issues, engine complications, faulty drive shafts, and difficult windshield installation.

Do you own a problematic Kubota RTV X1100C? Keep reading as we break down frequent Kubota RTV issues and how to troubleshoot them.

Kubota RTV X1100C Transmission Problems 

Kubota RTVs are susceptible to the following transmission issues.

  • Poor response
  • Hydrostatic pump failure
  • Overheating
  • Burning smell
  • Old hydraulic malfunction

Poor Response

Your RTV’s transmission system may fail to respond due to a wrong software setting or incorrect placement of the gear ratio sensors.

To fix this problem, try resetting the software settings and confirming if the gear ratio sensors are correctly placed or set. If the transmission system continues misbehaving, take your RTV X1100C to the nearest mechanic.

Hydrostatic Transmission Pump Failure

If your Kubota X1100C refuses to respond after pressing the throttle, the hydrostatic pump will likely be faulty.

Hydrostatic transmission pumps get damaged and malfunction after prolonged use. Regularly monitor them and replace them at the first signs of wearing out.

You could also take the hydrostatic transmission parts apart and put them back together to revive the system.

Cold Hydraulic System

Cold hydraulic system is among the leading Kubota RTV X1100C problems. A cold hydraulic system thickens the fluid, preventing it from flowing through the system. Hydraulic fluids are responsible for absorbing excess heat in the system.

Without reaching the pump, the transmission system retains most of the heat. This damages the transmission components, leading to significant malfunctions.

Add an anticoagulant to the hydraulic fluid if the car’s sign dashboard shows that the hydraulic system is cold. This prevents it from thickening, allowing it to flow smoothly.  

If your vehicle’s hydraulic system stays cold for a while, consider taking your car to a local mechanic to help identify and fix the problem.


Kubota RTV X1100C transmission systems overheat due to contaminated fluids. Contaminants like metal particulates lessen the fluid’s ability to cool the system sufficiently, increasing the chances of overheating. Leaks and faulty solenoids are the leading causes of this issue.

Flash out all the contaminated fluid and refill the reservoir with a clean, new one. Ensure you reach the recommended fluid level to avoid straining the transmission system.

You should also check for broken parts that promote leaking and repair or replace them immediately to curb this issue.

Solenoids regulate fluid flow into and out of the transmission system. Faulty solenoids restrict smooth fluid flow through the system. This inhibits the fluid from cooling the system adequately, increasing the transmission’s temperature.

Solenoids misbehave with age. Monitor them closely and replace them with new ones immediately after they show signs of wearing out.

Starting Issues

Kubota RTV X1100C starting problems might arise due to the following:

  • Low fuel levels
  • Excess air in the fuel system
  • High fuel viscosity
  • Faulty batteries

Low fuel levels restrict adequate fuel flow in the system. This causes the engine to strain when producing power, resulting in starting difficulties. Regularly monitor the fuel levels and refill the reservoir to the recommended level to prevent these Kubota RTV-X1100C problems.

You should also check if the fuel tank is broken and replace it immediately. Checking if the fuel filters are clean is crucial if your Kubota RTV 1100 will not move. Plugged fuel filters block the fuel flow in the vehicle’s system.

Excess air throws off the air and fuel combination ratio required for combustion. Without complete combustion, the engine can’t start. To fix this problem, bleed the fuel system for about three minutes or until no more bubbles are coming up.

It’s advisable to check if the fuel line coupling nut and bolt are tight enough. Loose nuts and bolts allow air penetration into the system. These components loosen after prolonged use and from the vehicle’s vibrations. Check them regularly and tighten them if loose.

Oils with high viscosity hardly flow to the engine, leading to hard starts. Fuels thicken or get highly viscous during the winter. You should use oils of varying viscosities, depending on the temperatures, to prevent these Kubota RTV X1100C problems.

Engines depend on the batteries’ power to ignite. Always confirm the battery’s charge is above 12 volts before setting off. It’s also advisable to regularly clean the battery cables and terminals to allow the smooth flow of power from the battery to the engine.

Kubota RTV X1100C Engine Problems

Your Kubota RTV X1100C might encounter the following engine problems.

  • Sudden stops
  • Black exhaust fumes
  • Overheating

Sudden Stops

Your RTV’s engine might stop suddenly due to insufficient oil and excess air in the system. Inadequate oil doesn’t lubricate the engine parts sufficiently, causing them to strain and malfunction. Regularly check the oil levels and refill the oil pan to the recommended level if depleted.

Excess air slows down the combustion process, causing the engine to strain. Bleed or purge the engine oil to eliminate all the air.

Black Exhaust Fumes

The Kubota RTV X1100C engine may produce black smoke due to poor fuel quality, excess oil, or a clogged air filter. Poor-quality fuel produces excess carbon during combustion, creating black smoke. Stick to the recommended high-quality fuel to avoid this problem.

Excess fuel creates an imbalance in the fuel and air ratio necessary for complete combustion. Incomplete combustion results in the production of black smoke. Always refill the reservoir to the recommended level to curb these issues.

Plugged air filters hinder the flow of sufficient air into the system. Inadequate air promotes incomplete combustion, producing black smoke. Regularly clean your vehicle’s air filters to prevent them from clogging.

Engine Overheating

Kubota RTV X1100C engines overheat due to overloading, low coolant levels, and dirty radiator fins. Exceeding the recommended load overworks the engine, causing it to produce excess heat. Always confirm the load before setting off to avoid these inconveniences.

Inadequate coolant doesn’t absorb all the excess engine heat, leading to overheating. Regularly check the coolant levels and refill the reservoir if depleted.

Radiator fins allow cool air to flow over the radiator and regulate the RTV’s temperatures. Clogged fins hinder air from entering the system, leading to overheating. Regularly clean your vehicle’s radiator fins to prevent this issue.

Faulty Drive Shaft

Most Kubota RTV X1100C users complain of loose drive shafts. Weak drive shafts produce a rattling noise when riding and are easy to note.

Fixing loose Kubota drive shafts in the comfort of your home is impossible. Take your RTV to the closest dealer for efficient repairs.

Being a prevalent problem, all Kubota dealerships own a fixing report on this issue. The dealer will fit the replacement U joint on your vehicle to deal with this problem for good.

Difficult Windshield Installation

According to new Kubota owners, installing the windshield on an RTV X1100C can be quite challenging. Fortunately, you can overcome this issue by following this simple installation guide.

  • First, remove the roof’s interior mounting screws for a smooth installation.
  • Proceed to loosen the mounting brackets’ front top nuts and install the windshield.
  • Reattach the roofing afterward.

Are Kubota RTV X1100C Problems a Deal Breaker?

Kubota RTV 1100 problems aren’t deal breakers. Regular maintenance is all that’s required to avoid most of these issues. This article excellently breaks down all the fixes you’ll need if you encounter any problems.