420 Starter, Flywheel
Page 1 of 2 12 LastLast
Results 1 to 10 of 19

Thread: 420 Starter, Flywheel

  1. #1
    Junior Member
    Display Name: [email protected]

    Join Date
    May 2019
    Posts
    15
    Thanks
    0
    Thanked 1 Time in 1 Post

    420 Starter, Flywheel

    Just bought a nice 420 from a guy that he told me up front has starter, flywheel problems. After pulling the engine it appears as though the starter did not engage all the way onto the flywheel, thus the ring gear is ruined and the teeth on the starter look bad also. When removing the two long bolts from the starter it looked like the starter wasn't lined up square to the enging. It was tight and all but seem to be leaning. Bolts were tight, but this starter was replaced once the guy told me. I am wondering if the wrong starter was installed? You guys ever had this problem. I just want to make sure when I replace the starter and flywheel that I get the correct one. Thanks in advance for any help.

  2. The Following User Says Thank You to [email protected] For This Useful Post:

    MatthewBraet (12-01-2019)

  3. Remove Advertisements
    WFMachines.com
    Advertisements
     

  4. #2
    Senior Member
    Display Name: Cliff H
    cliffh's Avatar
    Join Date
    Mar 2015
    Location
    Manitoba
    Posts
    1,014
    Thanks
    49
    Thanked 194 Times in 170 Posts
    Sometimes one of the mounting holes on the block cracks, and that makes the starter not sit right. That would be the first thing I would check.

  5. #3
    Senior Member
    Display Name: RussK
    bloodrunsgreen's Avatar
    Join Date
    Jul 2014
    Location
    Mid-Michigan
    Posts
    1,169
    Thanks
    17
    Thanked 150 Times in 139 Posts
    What is the engine make and model number? There are differences between the Onan B and P series that had powered the 420 originally, especially the starters and oil pans. Is the solenoid mounted to the starter or separate?

  6. Remove Advertisements
    WFMachines.com
    Advertisements
     

  7. #4
    Junior Member
    Display Name: [email protected]

    Join Date
    May 2019
    Posts
    15
    Thanks
    0
    Thanked 1 Time in 1 Post
    [QUOTE=bloodrunsgreen;1040840]What is the engine make and model number? There are differences between the Onan B and P series that had powered the 420 originally, especially the starters and oil pans. Is the solenoid mounted to the starter or separate?[/QUOTE

    The solenoid is mounted to the starter, but the problem is I'm not sure it's the right starter because it has been changed by previous owner....also having trouble determining what engine I have because the sticker on the shroud cover is unreadable. Also I'm not even sure of the serial number of this tractor because the sticker under the steering wheel is missing. My 318 has a metal plate with the serial number. I take it the 420's were stickers because this one is missing. Is there any other way to get this information. The problem with this whole deal is that this is the nicest 420 I have ever seen. Beautiful tractor! Thanks so much for your help, may need to pick your brain some more. I will send you some picks later. Tim

  8. #5
    Junior Member
    Display Name: [email protected]

    Join Date
    May 2019
    Posts
    15
    Thanks
    0
    Thanked 1 Time in 1 Post
    I'm going to post some pics of my starter and flywheel and maybe that will help with what engine I have. I did check the starter mounting tabs on the block and they are not cracked. IMG_1478.jpgIMG_1477.jpgIMG_1478.jpgIMG_1480.jpgIMG_1482.jpgIMG_1488.jpgIMG_1487.jpgIMG_1483.jpgIMG_1485.jpgIMG_1484.jpgIMG_1486.jpg

  9. #6
    Senior Member
    Display Name: RussK
    bloodrunsgreen's Avatar
    Join Date
    Jul 2014
    Location
    Mid-Michigan
    Posts
    1,169
    Thanks
    17
    Thanked 150 Times in 139 Posts
    Was there a plastic ring on the crankshaft? Is there a module with wires under the stator 9th pic(the thing with all the coil of wires)

  10. #7
    Super Moderator
    Display Name: Doug Hager
    dhager4692's Avatar
    Join Date
    May 2010
    Location
    West Central Missouri (KC)
    Posts
    3,138
    Thanks
    243
    Thanked 496 Times in 408 Posts
    In the 7th picture, the part number 140-4039 indicates it is a P series engine. Both Onan parts (134-4633) and JD (HE134-4633) are the new part numbers for the replacement ring gear/flywheel. The ring gear ( the part with the teeth) can be replaces without replacing the flywheel. The ring gear part number is 104-0779.
    Last edited by dhager4692; 12-01-2019 at 03:07 PM. Reason: add info
    "Everybody is a genius.
    But if you judge a fish by it's ability to climb a tree, it will live its whole life believing it is stupid."
    Albert Einstein

  11. #8
    Senior Member
    Display Name: Cliff H
    cliffh's Avatar
    Join Date
    Mar 2015
    Location
    Manitoba
    Posts
    1,014
    Thanks
    49
    Thanked 194 Times in 170 Posts
    That's good that the starter mounting tabs on the block are not cracked. That starter "should" be correct, but I can see that it is a "cheap chinese copy", and so the starter may or may not be the problem. If it wasn't made exactly right, starter/flywheel engagement would suffer.

    The engine looks very clean and dry, compared to most of the ones I have dealt with.

  12. #9
    Junior Member
    Display Name: [email protected]

    Join Date
    May 2019
    Posts
    15
    Thanks
    0
    Thanked 1 Time in 1 Post
    Thanks so much for the help. I think I will replace the ring gear and someone else said my starter looked like a cheap aftermarket replacement. This is a really nice tractor worth saving.

  13. #10
    Junior Member
    Display Name: [email protected]

    Join Date
    May 2019
    Posts
    15
    Thanks
    0
    Thanked 1 Time in 1 Post
    Thanks so much for the help. This is a very clean tractor worth saving. I will order parts tomorrow.

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •