Electric clutch question for RR

Discussion in 'Mechanic and Repair' started by dutch1, Mar 12, 2006.

  1. dutch1

    dutch1 LawnSite Silver Member
    from Jayhawk
    Posts: 2,231

    Restro, I am working on a Cub Cadet 1440 with a Warner clutch. Initially the regulator/rectifier showed no output even though the charging ring was giving proper output. Replaced reg/rect and clutch worked as it should except that the ammeter light came on. Clutch shows a draw of 17.8 amps which seems excessive and is likely the reason the ammeter light coming on since the draw exceeds the output of the regulator. The clutch shows a resistance through the coil of 1.2-1.3 ohms. According to Warner the resistance should be 2.48 ohms. MTD says the draw on the clutch should be around 4.84 Amps. What is your experience with this situation. I have convinced myself that the clutch is bad but with the part being proprietary to Cub Cadet dealers($300) I wanted to encourage your input before I give the customer the bad news.

    I might add that while checking the draw on the clutch the input side of the clutch(14.7 A) the output side showed 6.7 A and this I cannot explain.

    Dutch
     
  2. Splicer

    Splicer LawnSite Senior Member
    Posts: 992

    Is that draw with the electric PTO under a load or no load? Initially it sure sounds like a bad unit drawing 18Amps. My electric PTO running no load is about 2-3 Amps.
     
  3. dutch1

    dutch1 LawnSite Silver Member
    from Jayhawk
    Posts: 2,231

    Splicer,

    That load is with the clutch operating at max rpm.
     
  4. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,022

    This is the clutch I found for a 1440 Cub. Have you tried to adjust the air gap ? Along side of each nut is a slot to insert a 0.12" feeler gauge, Adjust each nut a 1/4 turn at a time working in a circle until 0.12" is reached at all three slots then see if the light still comes on.
     
  5. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,022

    Sorry, Here it is..... The wider the air gap the more amps the clutch will pull.

    Cub PTO Clutch.jpg
     
  6. dutch1

    dutch1 LawnSite Silver Member
    from Jayhawk
    Posts: 2,231

    Yes, I did check and adjust the air gap before doing all the testing that I did.
     
  7. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,022

    OK, The numbers you posted doesn't look good, But did you load test the battery to make sure it's good ? Did you check the charging system out-put at the battery at wide open throttle without the pto on then with the pto on and com-pair readings ? Where I'm going is if the battery is not holding the required amperage the clutch could pull more amperage from the system than what the charging system can keep in a weak battery which would cause the light to come on. Or there could be a problem with the light, Would you have thought you had a clutch problem if the unit didn't have a light ?
    Just trying to cover all bases before you tell your customer they have to cough up 300 bux for a clutch.
    If the above is OK then replace the clutch.
     
  8. dutch1

    dutch1 LawnSite Silver Member
    from Jayhawk
    Posts: 2,231

    Yes, Restro, the first three area I checked were battery, charging coil output and regulator/rectifier output. Battery would not hold a charge and when load tested checked out bad. Replaced battery and reg/rect and thought I had all my bases covered. Then when I was making sure that I was ready to send out the unit, the problem with the ammeter light occurred. That is when I proceeded with the clutch resistance and amperage draw test.

    Since I'm just an old fart working out of my building at home, and since I was going to gone all of last week, I sent the clutch with the customer to a CC dealer to have it evaluated off of the machine. I should hear from him tomorrow and maybe he will have a definitive answer.

    I am a retired mathematics teacher/coach who spent 7 years in a shop in the Indy area and my main job emphasis was the push mowers and 2 cycle equipment. As a result I don't have the greatest experience in the rider area, although I wouldn't classify myself as a dummy.

    Thanks for you help and suggestions.

    Restro, your highlight at the bottom of your page was one of my most used comments when I was a mathematics teacher.

    Dutch
     
  9. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,022

    Yeah, I've got it posted on a sign in our service department, ALL new employees are shown that sign. I tell them there are no dumb questions if you don't know the answer but plenty stupid mistakes can be made.

    Also, You done a jam up job at testing that thing out for being a push mower and 2 stroke joke......
     
  10. dutch1

    dutch1 LawnSite Silver Member
    from Jayhawk
    Posts: 2,231

    My phraseologhy was a little different, with the same result.

    "There aren"t any dumb questions, only stupid mistakes."
     

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