racerjohnbf
Super OPE Member
Hey guys, my Hustler Z zero turn just started blowing the 10 amp pto fuse. It starts blowing it after about 15 or 20 mins of mowing, if you let it cool down for 5 mins or so it will go for a couple mins then blow again. Odd thing to me is, I put an amp meter in the fuse socket and it never gets above about 5.8 amps when the fuse blows. So far I have tried...
1. Look for wire rubs, none found
2. Read resistance at clutch windings... 2.4 ohms when cold, 2.8 ohms after it blows fuse
3. Swap the relay from another matching relay on the mower... no change
4. Voltage drop test... .1v neg, .4 pos, when cold, forgot to check when hot
5. Turned on clutch circuit with plug unplugged at clutch... no amp draw, no blown fuse
6. I installed a 15 amp fuse for a few mins to finish mowing and it did not blow. (I know this is not the solution but needed to finish mowing)
I think there is a diode in the clutch pigtail. could that cause a blown fuse if bad?
Also what would cause the fuse to blow well below the rated amperage?
Any thoughts on what to try next?
I was thinking of wiring the clutch straight to the battery, at the pigtail so the diode is still there,
with a 10 amp fuse in line to isolate the circuit and hopefully narrow it down to the pigtail or the clutch itself.
Thanks,
John
1. Look for wire rubs, none found
2. Read resistance at clutch windings... 2.4 ohms when cold, 2.8 ohms after it blows fuse
3. Swap the relay from another matching relay on the mower... no change
4. Voltage drop test... .1v neg, .4 pos, when cold, forgot to check when hot
5. Turned on clutch circuit with plug unplugged at clutch... no amp draw, no blown fuse
6. I installed a 15 amp fuse for a few mins to finish mowing and it did not blow. (I know this is not the solution but needed to finish mowing)
I think there is a diode in the clutch pigtail. could that cause a blown fuse if bad?
Also what would cause the fuse to blow well below the rated amperage?
Any thoughts on what to try next?
I was thinking of wiring the clutch straight to the battery, at the pigtail so the diode is still there,
with a 10 amp fuse in line to isolate the circuit and hopefully narrow it down to the pigtail or the clutch itself.
Thanks,
John