Installing a new PTO Clutch on a Scag Tiger Cub

[tsh1773]

I bought a new PTO clutch yesterday because I was melting fuses with the blades engaged and everywhere I read said the cause was a short in the clutch. The clutch has a 2-wire plug shaped like a T. A couple of years ago the old plug coming from the wiring harness broke and the wire were connected using basic wire connectors. I want to make sure I don't destroy the new clutch by getting the wires crossed up. I have a volt meter and should be able to determine which wire from the harness is producing the power to the clutch. Now the question is, which part of the T connector coming from the clutch does that side go into? Thanks in advance.

[Restrorob]

It makes no difference, The clutch is only a magnetic winding......

[pugs]

As Rob said it makes no difference which wire has power and which goes to ground when hooking up a clutch. But I kinda doubt the clutch is whats burning your fuses. Have you checked all the connections and wiring?

[parkerbdlght]

Scag.com has the wiring diagram that shows all the colors

[tsh1773]

Got it. Thanks.

[RD 12]

Sounds like the same problem I'm having. Post and let me know if changing your clutch solved your problem. I was blowing fuses when the mower was under a load cutting grass for about 15 min.

[parkerbdlght]

Most of these clutches have adjustable air gaps, sometimes just adjusting the gap will make a huge difference in the cutting performance under load.
The air gap can be measured with feeler gauges, specs can be found in operators manual or at scag.com

[Jay19LM]

Your ampmeter will tell you what the problem is. What does it read with clutch off and clutch on. Also check charging voltage. The biggest thing I found blowing fuses on the Skag was a bad battery. 99% were sealed batteries. With all the bouncing around they can get bone dry. Unless you take the battery out and weigh it, you will never know. I have seen almost bone dry batterys start the engine, but it will max out your charging system which you will see on your ampmeter. A simple battery change may solve your problem. You will also get a different charging voltage between a good and bad battery.

Jay19lm "non-resistor"

[bob]

You might also want to replace the pto switch. I just changed my Gravely clutch. I also checked the bottom of the switch and it was starting to melt.