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Husqvarna RB150 - blades don't turn when I switch them on.Belt is on the wheels and have checked the electric connections ?

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  • andrew153 May 24, 2011

    The blades were working and then started to work intermintently .The seat switch has been removed long time ago ?

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Hello, Try listening for a click from the electric pulley clutch when you activate the blades. There should be a fuse holder close to the battery with an Automotive style colored fuse. If that is not blown, then unplug the connector for the electric clutch and use an Ohmmeter to check the wires from the clutch side of the connection. There should be continuity in the clutch.

If there is no continuity the clutch is bad. There are a few safety switches like your seat switch which will kill the Ignition and/or the blades if you get off the machine while it is running. If your model does not kill the engine when you leave the seat, then it is wired to stop the blades from rotating when you leave the seat.

There is another switch on the clutch pedal which sometimes gets grass clippings packed around it. Some models are made so they will not let you ride the clutch pedal and cut at the same time. The clutch return can not get to its normal height because the grass clippings are packed around the safety switch. You just need to clean away the debris jamming the switch.

In conclusion, when you check the electrical parts, the safety switches may be cutting power or a ground to a Relay. You would need weight on the drivers seat to defeat the safety switch. That is why an ohmmeter is useful and unplugging each component and checking for continuity in the component is your best bet.

Posted on May 25, 2011

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Two things will keep the blades from engaging. One is the mower is not charging the battery at the proper voltage. You will have to check the voltage output to the battery with a volt meter. Next to check, is the switch under the seat. This switch if not working proper or not making contact will think no one is sitting in the seat and will not allow the blades to come on. Hope this helps Fix Ya up.

Posted on May 24, 2011

  • John Fourteen Six May 25, 2011

    If your seat switch is by passed. You can look for voltage to the clutch, some models have a 2 wire harness to the clutch, one wire is hot from the dash switch to the clutch one wire is a ground back to the battery Negative post, or a junction at the frame. Another has one wire that runs to the clutch and the clutch has an internal wire to ground. If you have a one wire harness you can run a straight Hot wire from the battery to this wire and see if the clutch will engage. I would tell you to check this wire to the clutch for a break or bad connection at a plug or along the routing. Check this and get back to me with anything you find.

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