I’m working on an excavator that has a no start condition. If you turn the key on the fuel pump comes on and the shut off solenoid activates but the gauge cluster does not come on and the machine does not turn over. I can just the starter and it will start. I’m at a loss I have cleaned all the ground on the machine and visually checked the wiring but the machine is in really good shape with no sign of chewed up wires. Please help
No gauges no start kx71-3
- Thread starter Tallentmobile
- Start date
sounds like a fuse or two has blown, perhaps due to vermin....
you really, really need the wiring diagram to properly troubleshoot.
the owner's manual may have a list of what fuses protect what.
good news it , it's not the 'main' fuse as some things work.
you really, really need the wiring diagram to properly troubleshoot.
the owner's manual may have a list of what fuses protect what.
good news it , it's not the 'main' fuse as some things work.
I have checked every fuse on this machine. Should have said that was the first thing I did
your machine or customers? how many hours? recent damage or repair history possibly related? any particular event surrounding onset of these symptoms? any operator reports if it wasn't yourself?
just what ___ the starter are you describing? tapping, bypassing ignition switch, remote starting??
when it starts by that method does the gauge cluster energize and stay on with key on? will the engine then shut off normally by the key? if cluster does come up, does it shut down when key is switched off?
have you checked all harness connectors? checking for loose or misaligned shells and latches. open any suspect connectors and inspect for bent, damaged, corroded, or pushed back pins.
also check harness clamps, bulkhead passages, insulators, etc. for pinched or stretched wiring. broken copper inside an insulated wire can have you jumping through your butt for days.
did you check the starter relay? ignition switch? do you have b+ everywhere it should be? does it have any hidden inline fuses or fusible links?
when you're checking grounds, are you removing, cleaning, and reattaching those connections ensuring clean metal contact?
not sure what factory manuals are available with troubleshooting and diag strategies but a wiring schematic and layout diagram would be helpful to make sure you don't overlook anything. start at the cranking battery and work your way completely around. you're bound to run into the culprit eventually.
good luck!
Did you just pull the fuses and check if they were good or did you verify they have power?
Any chance you have a repair manual?
Download Kubota KX71-3 Workshop Manual | ManualsLib
Any chance you have a repair manual?
Download Kubota KX71-3 Workshop Manual | ManualsLib
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customer’s machine. It will start when I use my power probe on the small “trigger wire” at the starter, and it will turn off with the key. He mentioned it sat outside over the winter and had a dead battery, so they put a new one in, and now this is what it’s doing. I removed the grounds and cleaned them with a wire brush.
The ignition has power on the key on and when you turn it to start.
The ignition has power on the key on and when you turn it to start.
not a kubota dealer I hope. 
good points above, check power to and at interlocks and main busses.
I'm not familiar with that particular mini ex and it's not sitting in front of me so my previous post I posed a lot of things I would check as applicable if it was in my shop bay. really just basic troubleshooting heavy junk 101 stuff.
I'll add to check the collector if power passes through rotation. large machines, hydro cranes and truck mounted aerials are notorious for poor slip ring contacts that can cause a myriad of issues. something a machine wintered outside may experience.
good luck!
good points above, check power to and at interlocks and main busses.
I'm not familiar with that particular mini ex and it's not sitting in front of me so my previous post I posed a lot of things I would check as applicable if it was in my shop bay. really just basic troubleshooting heavy junk 101 stuff.
I'll add to check the collector if power passes through rotation. large machines, hydro cranes and truck mounted aerials are notorious for poor slip ring contacts that can cause a myriad of issues. something a machine wintered outside may experience.
good luck!
Rops I’m assuming.
Kx33 at work would do the same, key on fuel pump, no gauges. Jump start to trigger wire and key off would shut down. I went through all of the safety switches. No luck. Ended up being moisture in panel. I’d start poking around in there.
Kx33 at work would do the same, key on fuel pump, no gauges. Jump start to trigger wire and key off would shut down. I went through all of the safety switches. No luck. Ended up being moisture in panel. I’d start poking around in there.