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  1. #1
    Silver Member
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    5115M, 825I S.E., 1445 S2, F932, M, H, 8N,

    Default 1971 4320 cab electrical issue

    Hi
    On my 4320 there is a cab and in the overhead there is a blower fan and wiper switch. A month ago these did not work. Traced the problem to a solenoid on the steering counsel under the cover on the left side. Replaced it and all was perfect for about 1 hour or 4-5 engine starts. Then the solenoid failed. Figured it was a bad part. Replaced this part 2 more times and the same thing is happening. Tried a heavy duty solenoid same problem.
    OK I checked the amp draw from the blower motor and wiper. 5 to 8 amps seems normal.
    Checked the failed solenoid and it will not trip when powered.
    Any ideas on what could be frying the solenoids?

    A few more things I should also mention.
    The solenoid is activated when the key is turned on. A wire from the ignition switch to the control terminal on the solenoid. One wire only and the power stays on until you turn off the key.
    This is the oem design and original part. One terminal on the solenoid.
    12 volt system

    Thanks
    Last edited by Blade Breaker; 04-20-2014 at 08:27 PM.

  2. #2
    Elite Member Tx Jim's Avatar
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    Coyote Flats,Tx
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    JD 4255/Kubota M7040 HDC

    Default Re: 1971 4320 cab electrical issue

    I agree that the amperage draw shouldn't be too high. JD calls the device a relay not a solenoid but I don't know the difference in the nomenclature.
    AH98337 Relay ADD 52.49 USD
    Here's the spec's on the JD relay.
    Attached Thumbnails Attached Thumbnails -capture-jpg   -rp1220_________un01jan94-gif  

  3. #3
    Silver Member
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    5115M, 825I S.E., 1445 S2, F932, M, H, 8N,

    Default Re: 1971 4320 cab electrical issue

    Interesting. The part I took out looked nothing like that. It was a metal round solenoid. Must have had some different windings or something special to it.

    I will give that a try. Makes no difference to me what it looks like
    .

  4. #4
    Elite Member Tx Jim's Avatar
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    JD 4255/Kubota M7040 HDC

    Default Re: 1971 4320 cab electrical issue

    Did old relay resemble parts key #8 from a 4020? AR46334 Relay ADD 37.79 USD or from an A&I dealer A-AR54484 Relay - 30.82 US
    Attached Thumbnails Attached Thumbnails -r13770_________un01jan94-gif  

  5. #5
    Silver Member
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    5115M, 825I S.E., 1445 S2, F932, M, H, 8N,

    Default Re: 1971 4320 cab electrical issue

    Quote Originally Posted by Tx Jim View Post
    Did old relay resemble parts key #8 from a 4020? AR46334 Relay ADD 37.79 USD or from an A&I dealer A-AR54484 Relay - 30.82 US
    Yes that is what it looked like. Thank you very much!

  6. #6
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    Maryland

    Default Re: 1971 4320 cab electrical issue

    The AH98337 is the one you want. The other solenoids are starter circuit relays. They are not designed to be engaged for extended periods of time. The windings quickly overheat when left on for more than a minute or two at a time.

  7. #7
    Elite Member Tx Jim's Avatar
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    JD 4255/Kubota M7040 HDC

    Default Re: 1971 4320 cab electrical issue

    jd110
    JD also utilized the AR46334 for accessories. Here's a parts photo for one used on early 4430 HFWD & cab accessories
    Attached Thumbnails Attached Thumbnails -rwp3751________un01jan94-gif  

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