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Reload this Page Diode from PTO on LT2180
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  #1  
Old 08-23-2009, 07:37 PM
navyjoe navyjoe is offline
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Default Diode from PTO on LT2180
First, does my "04" LT-2180 fit ok in this forum? Its kinda new, not a classic Cub Cadet so I thought I ought to ask that first.

Today I had the side panel off to replace my fuel filter. I noticed a wire lead hanging loose with a big diode in it. It is on the red lead of the PTO clutch which is the "hot" from the Key switch and is common to the Alternator, PTO, fuel solenoid, and who knows what else. It even has a quick disconnect on it! My schematic shows a diode going from the above mentioned items to the red lead on the starter. Ive never had the stater off so It don't know why it would go there. Any Ideas? Anyone out there have a mower like mine that they could look and see?
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Old 08-23-2009, 08:56 PM
navyjoe navyjoe is offline
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I just noticed a threaded lug on the back of the starter. It is a ground lug. This diode is reverse biased, so could it be to allow the kick back current from the PTO to have an escape path?
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  #3  
Old 08-24-2009, 07:53 AM
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RPalmer RPalmer is offline
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navyjoe,
It is my understanding that diodes work as check valves. They only allow current to flow in one direction. A not so common diode, mostly used in older British electrical systems, is a zenner diode. It regulates current. I hope this helps.
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Old 08-24-2009, 09:57 AM
Titanium Titanium is offline
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They used to have zener diodes in old TV's too. When I was a kid, I had pals that worked on those things. A zener will allow the voltage to reverse direction when it goes above a certain value.
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Old 08-24-2009, 05:04 PM
ajgross ajgross is offline
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Joe can you post a pic of the wire? i have a LT2180 that I could check for you. Just need to see what I'm looking for.

AJ
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1980 [COLOR="Red"][/COLOR]482- Stock
1981 [COLOR="Red"][/COLOR]582- Mag18, Sleeve Hitch, Spring assist
1979 [COLOR="Red"][/COLOR]682- Mag18, Sleeve Hitch, Spring Assist, #1 Tiller
1980 [COLOR="Red"][/COLOR]782- Mag18, Sleeve Hitch
1983 [COLOR="Red"][/COLOR]982- Stock, Fully Optioned
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  #6  
Old 08-24-2009, 10:41 PM
navyjoe navyjoe is offline
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Thanks AJ, here it is. It on the engine right side "passenger side". The diode is on the left, it is the black object out of focus. It attaches to a red wire that goes to a blact connector for the PTO that has a yellow sleeve on it. If this picture isn't clear enough I'll take one with some white paper behind it.

Joe
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  #7  
Old 08-25-2009, 12:38 AM
ajgross ajgross is offline
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On my 2180, that wire connect directly to the positive lug on the starter along with the battery cable. Look under the red boot on your starter and you should see the terminal where the wire was attached.

AJ
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1980 [COLOR="Red"][/COLOR]482- Stock
1981 [COLOR="Red"][/COLOR]582- Mag18, Sleeve Hitch, Spring assist
1979 [COLOR="Red"][/COLOR]682- Mag18, Sleeve Hitch, Spring Assist, #1 Tiller
1980 [COLOR="Red"][/COLOR]782- Mag18, Sleeve Hitch
1983 [COLOR="Red"][/COLOR]982- Stock, Fully Optioned
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Old 08-25-2009, 11:05 AM
navyjoe navyjoe is offline
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Thanks! I must admin that is where the wiring diagrams shows it, but since I've never had the cable off I was a little skeptical. I will reconnect it. Thanks again.

Joe
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Old 08-25-2009, 11:36 AM
ajgross ajgross is offline
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You're welcome. Glad to help.

AJ
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1980 [COLOR="Red"][/COLOR]482- Stock
1981 [COLOR="Red"][/COLOR]582- Mag18, Sleeve Hitch, Spring assist
1979 [COLOR="Red"][/COLOR]682- Mag18, Sleeve Hitch, Spring Assist, #1 Tiller
1980 [COLOR="Red"][/COLOR]782- Mag18, Sleeve Hitch
1983 [COLOR="Red"][/COLOR]982- Stock, Fully Optioned
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