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  1. #1
    Bronze Member
    Join Date
    Jun 2006
    Posts
    65
    Location
    Dayton, Pa
    Tractor
    Power Trac 425

    Default pt425 shutting off

    Lately my machine has been shutting off after running for a while. I have changed the air filter and fuel filter, and plugs. Problem seems to be getting worse. Fuel line is clear. I am thinking maybe the fuel pump may need replaced. Any ideas?

  2. #2
    Platinum Member tmarks11's Avatar
    Join Date
    May 2005
    Posts
    647
    Location
    Port Orchard, WA
    Tractor
    2005 Power Trac 422

    Default Re: pt425 shutting off

    What brand engine do you have?

    Loose wire in the wiring harness to the engine? That seems the usual suspect for an intermittent problem like this. I seem to recall some thread about an inline fuse holder in the engine compartment. The next most likely is either the ignition switch or the wiring under the dash to the ignition switch. Quite a few poorly crimped spade terminals there.

    Is the low oil pressure shutdown wired on your engine? That could be a source of the problem, but unlikely. It doesn't come that way by default; positively a crime in my book, PT should have at least wired it to a buzzer.
    -----------------------------------------------------
    Now in Port Orchard, WA
    2005 PT-422
    4n1 bucket, minihoe, auger, 48" mower, land pride aerator, tow adaptor, forklift, crane, Herd GT77 spreader, LMB, 60" blade, M1 abrams turret.
    PT422 (6/23/05) photo page

  3. #3
    Bronze Member
    Join Date
    Jun 2006
    Posts
    65
    Location
    Dayton, Pa
    Tractor
    Power Trac 425

    Default Re: pt425 shutting off

    I thought about the oil so I changed it and still the same problem. Put a new switch in about a year and a half ago. I did have a problem twice with the fuse being bad, but I will check it again. Thanks

  4. #4
    Bronze Member
    Join Date
    Jun 2006
    Posts
    65
    Location
    Dayton, Pa
    Tractor
    Power Trac 425

    Default Re: pt425 shutting off

    Sorry its a Kohler command 25

  5. #5
    Elite Member woodlandfarms's Avatar
    Join Date
    Jul 2006
    Posts
    4,233
    Location
    Los Angeles / SW Washington
    Tractor
    PowerTrac 1850

    Default Re: pt425 shutting off

    Vapor lock?
    Power-Trac 1850, grapple, hoe, 90" mower, 72" box blade

  6. #6
    Platinum Member tmarks11's Avatar
    Join Date
    May 2005
    Posts
    647
    Location
    Port Orchard, WA
    Tractor
    2005 Power Trac 422

    Default Re: pt425 shutting off

    Pin hole leak in fuel pump diaphragm?
    -----------------------------------------------------
    Now in Port Orchard, WA
    2005 PT-422
    4n1 bucket, minihoe, auger, 48" mower, land pride aerator, tow adaptor, forklift, crane, Herd GT77 spreader, LMB, 60" blade, M1 abrams turret.
    PT422 (6/23/05) photo page

  7. #7
    Veteran Member
    Join Date
    Jun 2006
    Posts
    2,119
    Location
    West Cascades Washington State
    Tractor
    PT 422

    Default Re: pt425 shutting off

    bad fuse holder?

  8. #8
    Platinum Member tmarks11's Avatar
    Join Date
    May 2005
    Posts
    647
    Location
    Port Orchard, WA
    Tractor
    2005 Power Trac 422

    Default Re: pt425 shutting off

    We could play this game for hours.... "Name the top 50 things that would cause a PT to sputter and stall..."
    -----------------------------------------------------
    Now in Port Orchard, WA
    2005 PT-422
    4n1 bucket, minihoe, auger, 48" mower, land pride aerator, tow adaptor, forklift, crane, Herd GT77 spreader, LMB, 60" blade, M1 abrams turret.
    PT422 (6/23/05) photo page

  9. #9
    Silver Member
    Join Date
    Feb 2009
    Posts
    224
    Location
    south western michigan
    Tractor
    pt 425, JI Case, Gravely Comm.10A

    Default Re: pt425 shutting off

    mine was the snap lock (stak-on) style fuse holder, I replaced it with a marine grade fuse holder with solder shrink wire connectors have not had a dying/sputtering problem since , but keep in mind I have the Subaru engine

  10. #10
    Gold Member Clumber's Avatar
    Join Date
    Sep 2010
    Posts
    348
    Location
    Northern Virginia
    Tractor
    PT425 (Dec 2010)

    Default Re: pt425 shutting off

    Quote Originally Posted by smilindave View Post
    Lately my machine has been shutting off after running for a while. I have changed the air filter and fuel filter, and plugs. Problem seems to be getting worse. Fuel line is clear. I am thinking maybe the fuel pump may need replaced. Any ideas?
    My PT 425 was doing the same. Finally traced to tiny bits of debris in the fuel just big enough to block the intake hole in the fuel filter, but not be visible. A suggestion is to remove the fuel filter again and blow compressed air into the out-take end to blow any debris out the other end. There was bits of debris in the fuel tank -- had to drain and vacuum it out. One of my old fuel cans was the source.

    The PT would run for a while then quit when the filter was blocked. Minutes later debris would dislodge and the PT would start and run for a while then stop again... I now keep spare fuel filters in the tub to keep it running when I am using the tractor far from the shop. The issue has not repeated since.
    I married me a hippy, ran away with a stringy haired blond,
    Now we're both old and happy, fishing on our own Golden Pond. -- Merle Haggard


    PT 425 (Dec 2010), Blade, Snow Blower, Sweeper, Spreader, LMB, 4n1, Small Bucket/Teeth, Utility Grapple, Brush Cutter, Box Blade, Mini Hoe/Thumb, Forks, Power Dumper

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