JD 425 only getting 6 volts to fuel pump
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Thread: JD 425 only getting 6 volts to fuel pump

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    JD 425 only getting 6 volts to fuel pump

    Hello eerr body who thinks green! lol
    I just picked up a JD 425. Fuel pump is not running. I check the voltage and I'm only getting 6 volts to the fuel pump. The battery is new and turns over great. I replaced the TDM. Still only 6 volts? Ill check the voltage at different point when I get to work on it again. Hopping somebody knows the smoking gun....of the problem.

    Thanks

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    Quote Originally Posted by 7stwman View Post
    Hello eerr body who thinks green! lol
    I just picked up a JD 425. Fuel pump is not running. I check the voltage and I'm only getting 6 volts to the fuel pump. The battery is new and turns over great. I replaced the TDM. Still only 6 volts? Ill check the voltage at different point when I get to work on it again. Hopping somebody knows the smoking gun....of the problem.

    Thanks
    Does anybody have the schematics for a 425?

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    flyweight's Avatar
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    Quote Originally Posted by 7stwman View Post
    Does anybody have the schematics for a 425?
    Serial Number range? -70,000 or 70,001 -
    Michael

    2019 JD Z540R 54" cutting deck w/MulchControl™
    1984 JD 750
    1971 JD 15 Chainsaw ← hasn't run since ~1975

    Also have a bunch of other stuff.
    ---------------------------------------
    " If there's no one around to smell me, do I really stink"?
    - John Wells - Brewster County, West Texas.










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    flyweight's Avatar
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    Here you go. Looks as if they are similar.
    Chick Image to enlarge.


    Click image for larger version. 

Name:	425 -70k.png 
Views:	25 
Size:	58.0 KB 
ID:	138225

    Click image for larger version. 

Name:	425 70001-.png 
Views:	16 
Size:	55.9 KB 
ID:	138233
    Michael

    2019 JD Z540R 54" cutting deck w/MulchControl™
    1984 JD 750
    1971 JD 15 Chainsaw ← hasn't run since ~1975

    Also have a bunch of other stuff.
    ---------------------------------------
    " If there's no one around to smell me, do I really stink"?
    - John Wells - Brewster County, West Texas.










  7. The Following 2 Users Say Thank You to flyweight For This Useful Post:

    dieselshadow (02-28-2016), Jeff B (02-28-2016)

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    Quote Originally Posted by flyweight View Post
    Here you go. Looks as if they are similar.
    Chick Image to enlarge.


    Click image for larger version. 

Name:	425 -70k.png 
Views:	25 
Size:	58.0 KB 
ID:	138225

    Click image for larger version. 

Name:	425 70001-.png 
Views:	16 
Size:	55.9 KB 
ID:	138233
    Oh man!! Thanks... that should take a lot of guessing out of it. Thanks again
    flyweight likes this.

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    425

    Thanks for the schematics.
    I had two 2 problems. 1 the fuel pump was locked up. Gave it a tap with 12 volts to it and it started working. 2 after I took the fenders off. I did not jumper the seat switch. So I was only getting 6 volts. I jumper the seat switch and the other 6 volts showed up and its working fine now. I wanted to finish my thread hoping it might help somebody down the road!


    Thanks
    flyweight likes this.

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    That is something that I learned. The seat switch.

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    Pardon my ignorance but what is the TDM?

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    flyweight's Avatar
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    Quote Originally Posted by olgreyhair View Post
    Pardon my ignorance but what is the TDM?
    Time Delay Module. Item # 30.
    Michael

    2019 JD Z540R 54" cutting deck w/MulchControl™
    1984 JD 750
    1971 JD 15 Chainsaw ← hasn't run since ~1975

    Also have a bunch of other stuff.
    ---------------------------------------
    " If there's no one around to smell me, do I really stink"?
    - John Wells - Brewster County, West Texas.










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