How do I Troubleshoot a Kubota L3600 Tractor?

Written by ross glyn
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How do I Troubleshoot a Kubota L3600 Tractor?
Troubleshoot a Kubota L3600 Tractor (tractor image by Alison Bowden from

The Kubota L3600 tractor, produced between 1994 and 1999, features a 30-hp, 4-cylinder diesel engine. This machine is ideal for agriculture and has a rear lift capability of 1402kg. These distinctive orange tractors are dependable and sturdy; however, as with most farm equipment with multiple moving parts, wear and tear occurs over the years. Before calling a service technician for what could turn into an expensive visit, there are a few troubleshooting steps you can run through on your own.

Skill level:

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Things you need

  • wire brush
  • pocketknife

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  1. 1

    Check the battery if the engine will not crank. Make sure the battery has a sufficient charge and that the cables are free of dirt or corrosion. Remove the battery cables, negative side first. Inspect the cables for any damage and replace them if necessary. Clean the battery connections with a small wire brush or pocketknife. Reconnect the cables, connecting the positive cable first.

  2. 2

    Check to see if the engine has "locked." Water in the cylinders and crankcase can prevent the pistons from moving in the cylinders. Take out all the glow plugs and rotate the engine by hand. This should purge water from the system.

  3. 3

    Inspect the fuel filter for dirt and clean if the engine cranks over but will not start up. Clean or replace the fuel filter if necessary.

  4. 4

    Open the gas tank and sniff for any odour of gasoline mixed in the diesel. If you detect gas, flush the tank and fuel system immediately. Refill the tank with the correct diesel fuel.

  5. 5

    Clean the radiator by blowing through the fins with compressed air if the engine tends to overheat.

  6. 6

    Check to see that fuel is reaching the injectors. Inspect the injection pump for a stuck fuel control lever. Follow the engine stop rod to the end of the injection pump. Push in on the rod. If the spring lever does not automatically follow, push it in manually with your finger. You may need to use a little oil to loosen it up.

Tips and warnings

  • If there is no sign of smoke when you attempt to start the engine, it may mean that the fuel is not reaching the motor.
  • A 50/50 mix of antifreeze and distilled water is ideal for the radiator.
  • Always use protective eyewear when cleaning the battery.
  • Never pour anything other than distilled water and antifreeze in the radiator. Ordinary tap water can cause mineral deposits to build up and create blockages in the engine.
  • Pouring cold water on the engine could cause damage to the cylinder head.

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