Monarch 16CY clutch plate keyway repair
Close
Login to Your Account
Results 1 to 8 of 8
  1. #1
    Join Date
    Dec 2016
    Country
    UNITED STATES
    State/Province
    New York
    Posts
    710
    Post Thanks / Like
    Likes (Given)
    9
    Likes (Received)
    253

    Default Monarch 16CY clutch plate keyway repair

    There's lots of good YouTube content on removing and repairing the Clutch on the Monarch 16 CY however i have a problem not covered. The Square headed drive pin got misaligned in its' hole after decades of service and buggered up the mating keyway in the driven plate (pics attached). My thinking is to just broach a new keyway but before i attempt this, i figured i would consult with the brain trust to determine if there are any hidden traps. The plate material doesn't appear to be hardened as i can remove material with a file on the buggered up area. Not as soft as HRS but it can definitely be filed. IS there anything in particular i should think about before i attempt this?

    M
    Attached Thumbnails Attached Thumbnails img_20210209_123950647.jpg   img_20210209_124001522.jpg   img_20210209_124009066.jpg  

  2. #2
    Join Date
    Apr 2011
    Country
    UNITED STATES
    State/Province
    Wisconsin
    Posts
    451
    Post Thanks / Like
    Likes (Given)
    184
    Likes (Received)
    104

    Default

    IDK what do you think, maybe lay some weld in there and put the swiss mill to work and recreate the keyway?

  3. #3
    Join Date
    May 2009
    Location
    New Jersey
    Posts
    333
    Post Thanks / Like
    Likes (Given)
    87
    Likes (Received)
    58

    Default

    I would cut a new keyway 180 degrees to the buggered one and use that. Seems that would work and not have any negative effects.

  4. #4
    Join Date
    Jan 2021
    Country
    UNITED STATES
    State/Province
    Pennsylvania
    Posts
    58
    Post Thanks / Like
    Likes (Given)
    19
    Likes (Received)
    2

    Default

    I too would cut/broach another one 180 out like suggested, put it back together and run it. By the time it wears the new one out it will be the next guys issue to solve. Faster and easier solution than welding up the existing one and recutting it, save that for when it needs another keyway cut in 50+ years. How’s the other side of the key fit in its mating slot/hole? If there’s play there too I’d be inclined to address that as well.

  5. #5
    Join Date
    Sep 2011
    Country
    UNITED STATES
    State/Province
    Virginia
    Posts
    19,115
    Post Thanks / Like
    Likes (Given)
    7561
    Likes (Received)
    11682

    Default

    Cynic, Iyam.

    We dunno if that damage started in month five or year fifty-five.

    I'd be tempted go to two if not three drive keys and goal for longer life, regardless.

  6. #6
    Join Date
    Dec 2008
    Location
    minnesota
    Posts
    209
    Post Thanks / Like
    Likes (Given)
    45
    Likes (Received)
    190

    Default

    K I S S

    A new keyway on opposite side or elsewhere should be just fine.

    Be concerned about critical balance if you plan to run that clutch

    above ten or fifteen thousand R P M .

    petersen

  7. #7
    Join Date
    Sep 2016
    Country
    UNITED STATES
    State/Province
    Missouri
    Posts
    1,085
    Post Thanks / Like
    Likes (Given)
    891
    Likes (Received)
    349

    Default

    Quote Originally Posted by thermite View Post
    Cynic, Iyam.

    We dunno if that damage started in month five or year fifty-five.

    I'd be tempted go to two if not three drive keys and goal for longer life, regardless.

    Two or three keys wouldn't hurt anything.
    That key basically just keeps the plate turning in sinque with the clutch. Once the clutch is engaged the torque is transfered to the pressure against the plates.
    Slipping the clutch would put some torque on the key.

    Edit
    I could be thinking wrong on that
    Last edited by mllud22; 02-13-2021 at 01:20 PM.

  8. #8
    Join Date
    Sep 2011
    Country
    UNITED STATES
    State/Province
    Virginia
    Posts
    19,115
    Post Thanks / Like
    Likes (Given)
    7561
    Likes (Received)
    11682

    Default

    Quote Originally Posted by mllud22 View Post
    Two or three keys wouldn't hurt anything.
    That key basically just keeps the plate turning in sinque with the clutch. Once the clutch is engaged the torque is transfered to the pressure against the plates.
    Slipping the clutch would put some torque on the key.

    Edit
    I could be thinking wrong on that
    Lots and lots of "production" cycles calling for braking or reversing was on my mind.

  9. Likes mllud22 liked this post

Tags for this Thread

Bookmarks

Posting Permissions

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