Toro - PTO - Blows Fuse

[srefird]

I have a Proline 44" cut and it has worked great for about 4 years. Now, evertime I energize my pto, within 3-5 secs the fuse blows and the blades cut off. This system does not have a battery.

I've checked the PTO for a short to ground. (none)
I've pulled it off to inspect and to recalibarte. (complete)
I've inspected all wireing for any shorts or frayed wiring. (none found)
Have replaced the "black box" module that does God knows what. I'm assuming it is a voltage regulator. (complete)

I have not yet replaced the blade engagement relay.
I don't see how that relay can be causing a the fuse to blow.
But that is about all that is left.

It seems to me that the unit is cranking out more power than the pto (fuse) can handle.

Any suggestion would be appreciated.

Thanks,
srefird

[lorenzo piedra]

Try putting in a 30 amp fuse and see if that blows.

The only purpose of that fuse is to not melt the wiring harness from a direct short.

[srefird]

Toro - PTO - Blown Fuses

Thanks, I didn't want to own up to it but since you've suggested it I will. I already replaced the 7.5a fuse with a 10a fuse and it held up while I mowed last week. I figured that I would "cook" something if I left it over fused. I would like to determine what is causing the problem. There is the PTO relay switch (module) and I think the voltage regulator module (not sure what the unlabeled 5 wire module is) but I didn't want to "fry" those units.

[PNA]

srefird,
Did you ever find out what was causing this problem? I have a similar problem on my Toro ZTR. Both fuses (main and alternator) blow just as you describe.
PNA