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#1
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2166 High Voltage
Hi,
I have a Cub Cadet 2166 (13A-254G100) with a Kohler Command OHV 16.0HP Model #CH16S and I wonder if anyone can help me figure out why my charging system seems to be generating to much voltage. I’m on my 3rd PTO clutch and the only thing I can figure out is that the voltage going to the PTO (14.5 DCV) is burning them out. The other problem is blowing the 25A main power fuse on a regular basis which is probably because of the same issue. I have tested and replaced the battery, regulator-rectifier, relays, and PTO switch. None of these components tested poorly, but I am desperate, so I swapped them out. I have cleaned and tested every connection I can find and have good ground on every connection. I have not replaced the stator because it is putting out 39.5 ACv when the engine is running at full throttle which seems to be in-spec. I also have not touched the Spark Advance Module because I don’t know anything about how it might contribute to this problem. I put together the attached diagram showing what the readings are in various places in the harness and would appreciate if anyone has an idea as to what I can do to bring the voltage down. |
#2
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Here is a .pdf that has enough resolution to read.
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#3
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14.5 volts DC is within spec. You don't have a voltage problem.
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#4
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I hope you’re right. Xtreme is adamant about having below 14v shown here and @ 1:45 in this video. After 3 of those PTO’s (don’t know why I went back to them) I just installed this one hoping it will last longer. I did find a note saying the original equipment was designed for a 13v-14v operating range a few years ago but can’t find it now, and I can’t find any electrical information for these PTO’s online. I even called the company I bought the new one from and they don’t have it.
Are the Xtreme PTO's junk? Do you think the new one will last running at 14.5V? |
#5
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(A) Check and make sure the V/R is properly ground. With a DVM, measure the resistance between the V/R case and the Battery Negative Terminal. There should be zero ohms resistance.
(B) If 39.0 VAC is the input to the V/R, and is considered acceptable by Kohler/Cub Cadet's specifications, then the V/R itself sounds like it is bad.
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Roland Bedell CC Models: 100, 105, 1450, 782, (2) 784, & 2072 Buy: Made in the USA |
#6
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I think xtreme makes a great product. They are the unofficial recommended replacement for PTO's on this site.
I think you have a different problem. I'm willing to bet that you have a poor connection somewhere that is causing an issue. 14.5V on the charging system itself has nothing to do with the 25A fuse blowing. 25 amp is 25 amp. Doesn't matter if the voltage is 12 or 14.5, that fuse will only blow if a load larger than 25 amp is on that circuit. Now, if there is a short, or a poor connection, or a failing component, that can blow the fuse. I'm betting the PTO is getting less than 12v and that's why it keeps failing. Unfortunately, you have to be the one to test and find the source of the issue. Follow the wiring diagram and start from the beginning. One more thing....If you are measuring the voltage at the PTO by unplugging the connector and testing, that doesn't account for the load. Plug the PTO in, and back probe the connection to see what it reads with the PTO on. I suggest taking the belt off while testing. Better if the engine is running WOT for the test so that you get a max power reading. Either way..... 0.5V over 14v is not likely to be causing an issue. 14.5V is an acceptable charge voltage. However, 39V AC sounds high from the stator. How fast is your engine running at WOT? |
#7
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Thanks for the suggestions. Here is what I'm reading to do.
I found a few more clues in the Kohler service manual to test the stator and regulator rectifier so I'll run all these tests and report back. It looks like I need to get a small engine tach as well. |
#8
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Quote:
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(2) Original, 100, 102, 124, 73, 800, #1 and #2 cart, brinly plows, disk, IH184, IH244, 1948 F Cub |
#9
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Here is the research that I have done.
The 2166 rolled out of the Factory with a Kohler CH16-45509 Engine. That engine uses KH-237878 Stator. That stator was used in numerous models of Kohler Engines. The specification on that Stator is located here.... Specification Thus "normal" input to the V/R should be 28-30 VAC with a typical output of 13.7VDC and a "maximum output" of 14.7 VDC. This is what this tractor should be performing.
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Roland Bedell CC Models: 100, 105, 1450, 782, (2) 784, & 2072 Buy: Made in the USA |
#10
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What we said
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(2) Original, 100, 102, 124, 73, 800, #1 and #2 cart, brinly plows, disk, IH184, IH244, 1948 F Cub |
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