Kubota U10/U20 Excavator Engine Starting Malfunction Solution

This illustration show you guide on how to solve Kubota U10/U20/U35/U45 engine starting malfunction.

 

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Takeuchi Excavator Workshop EPC+Service Manual 2018 PDF Files

 

Steps:

First check battery charging amount and earth line condition.

Second check if battery voltage is on S-terminal of starter when starter switch is at ‘ start’ position.

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If battery voltage doesn’t exist at B-terminal;

Check continuity of slow blow fuse.

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Check continuity between 30 and 50 terminals when turning on the switch.

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Coupler or wire harness have failure of connection.Kubota EPC Download

Check continuity of wire harness.

* Fusible link and 30-terminal of starter SW.

*S-terminal of starter motor and 50 terminal of starter SW.

 

In case battery voltage exists at B-terminal; starter motor should be suspected and so check the following.

  1. Contact failure of S-terminal.(Check continuity between S-terminal and body earth.)
  2. Starter body earth failure.(Check continuity between starter and body earth.)
  3. Cutting of pull-in coil and holding coil.(Check continuity test between S-terminal and body.)

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More repair cases for Kubota,please refer to:Kubota Trouble Repair

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