Any V belt experts on line?
Close
Login to Your Account
Page 1 of 2 12 LastLast
Results 1 to 20 of 33
  1. #1
    Join Date
    Nov 2007
    Location
    marysville ohio
    Posts
    10,669
    Post Thanks / Like
    Likes (Given)
    2984
    Likes (Received)
    7376

    Default Any V belt experts on line?

    I have had 3 belts break on on my mower. It is the belt between the electric clutch on the engine and the mower deck. The first one from Rural King, a local farm store lasted about 10 hours, the next one also from Rural King, Jason Industrial brand, Finest china quality lasted about 4 hours. Next I tried a Gates brand from Motion Industries, good for about 4 hours. This belt normally lasts for years, WTF? It is a 5/8" wide x 161" long so at about 50.00 each it is not a cheap date. The belt looks in perfect condition except where it is snapped in two, no damage to the belt from the pullies. The belt bends back about 90 degrees from straight around 2 idler pullies. Is there special belts for this?

  2. #2
    Join Date
    Oct 2005
    Country
    UNITED STATES
    State/Province
    Pennsylvania
    Posts
    21,978
    Post Thanks / Like

    Default

    Are the pullies worn ?

  3. Likes BT Fabrication, Hightemp, Doozer liked this post
  4. #3
    Join Date
    Mar 2005
    Location
    Kansas
    Posts
    8,609
    Post Thanks / Like
    Likes (Given)
    603
    Likes (Received)
    4339

    Default

    How long did the original belt last? I had similar luck on a deere, went back to deere's belt and it hasn't broke yet. A 161" B belt for $50 seems stupid cheap. I think my 60? inch deere was $65 or so.

  5. #4
    Join Date
    Apr 2005
    Location
    Southwest
    Posts
    609
    Post Thanks / Like
    Likes (Given)
    30
    Likes (Received)
    43

    Default

    I am no belt expert. It must have some type tension pulley and maybe an idler pulley or two. Make sure all are in good condition and function properly. If the tension pulley swing arm locks up momentarily it can snap a belt as well as any other free wheeling pulley.

  6. #5
    Join Date
    May 2021
    Country
    UNITED STATES
    State/Province
    Illinois
    Posts
    218
    Post Thanks / Like
    Likes (Given)
    32
    Likes (Received)
    90

    Default

    That is 100% weird, I have never broken a mower belt and I have been using riding mowers for decades. V-belts are supposed to ride on the sides and not bottom out. Could it be possible the OEM belt was a little wider or of better quality? You would think a bad pulley or tensioner would cause slipping or the belt to jump off and not snap them.

  7. #6
    Join Date
    Jan 2005
    Location
    Victoria, Texas, USA
    Posts
    4,692
    Post Thanks / Like
    Likes (Given)
    3279
    Likes (Received)
    1298

    Default

    You have to get the Kevlar belts. I just purchased some from these guys. V-Belt Global Supply, LLC. | V-Belt Online Catalog

    The only drawback I found, the V-belts come from India now instead of China. They seem to be of very good quality. Ken

  8. Likes David_M liked this post
  9. #7
    Join Date
    Jan 2007
    Location
    wales.uk
    Posts
    1,781
    Post Thanks / Like
    Likes (Given)
    379
    Likes (Received)
    409

    Default

    Belts with tight curves usually have back notches to allow a tighter bend radius, that’s all I got!
    Mark

  10. #8
    Join Date
    Jan 2007
    Location
    Norfolk, UK
    Posts
    21,387
    Post Thanks / Like
    Likes (Given)
    16754
    Likes (Received)
    17461

    Default

    Fell in to the same trap years ago - used ''ordinary'' belts (gates etc etc) and they fell apart after a few hours and I had myself a warranty job (big loser ) I got genuine OEMs (which I was told were special) and they lasted eons.

  11. Likes 3t3d liked this post
  12. #9
    Join Date
    Mar 2009
    Country
    UNITED STATES
    State/Province
    California
    Posts
    6,142
    Post Thanks / Like
    Likes (Given)
    116
    Likes (Received)
    1203

    Default

    Do what I did 15 years ago. Buy a spray can of belt dressing and leave it on the shelf.

    Belts should be left alone.

  13. #10
    Join Date
    May 2008
    Country
    UNITED STATES
    State/Province
    Minnesota
    Posts
    863
    Post Thanks / Like
    Likes (Given)
    435
    Likes (Received)
    439

    Default

    Make sure it is the belt causing the problem.

    Story time: Last fall the lawn mower (John Deere 318 with 42" 3 blade deck) at the cabin started squeeling and not cutting. Looked at the big belt connecting the front pulley to the deck. It was really ratty looking. So brought the mower home. It sat until this spring. Spent $40 and put new OEM belt on. Realized only the middle blade will turn. Took off deck and there is an intermediate belt. Spring on the tensioner for that belt was broken and that belt was melted. Figured it was the tensioner spring failure that destroyed that belt. Replaced tensioner spring and intermediate belt. Test mowed for 15 minutes. Perfect. Took it to the cabin. Mowed perfectly for 15 minutes and then started smoking.

    Take it all apart in the middle of the unmowed grass and mosquitos. One of the spindles was seized. Probably took out two two belts and a tensioner. But in the midst of all that had some periods were it was working.

    (will omit details from this morning of pressing apart the seized spindle and two good ones. Just will say seized spindle came out. "Good" ones blew the end off the bearing housing. $350 for two new assemblies instead of $12 of bearings.)

    I'd look at what the belts are turning.

  14. #11
    Join Date
    May 2021
    Country
    UNITED STATES
    State/Province
    Illinois
    Posts
    218
    Post Thanks / Like
    Likes (Given)
    32
    Likes (Received)
    90

    Default

    Had a customer who did custom car work for some pretty high end clients decades ago, he would use nothing but Goodyear belts. Who knows if the quality is the same today.

  15. #12
    Join Date
    Dec 2008
    Location
    Vt USA
    Posts
    9,156
    Post Thanks / Like
    Likes (Given)
    1583
    Likes (Received)
    3284

    Default

    There is a difference between "Mower belts" and industrial Vee belts.

    I don't know why, but there is. and Mower belts Last alot longer in mower applications.

    I went through the exact issue with my old 54" cut Mighty Vac (now Scagg) walk behind.

  16. Likes Limy Sami, 3t3d liked this post
  17. #13
    Join Date
    Nov 2007
    Location
    marysville ohio
    Posts
    10,669
    Post Thanks / Like
    Likes (Given)
    2984
    Likes (Received)
    7376

    Default

    Quote Originally Posted by kb0thn View Post
    Make sure it is the belt causing the problem.

    Story time: Last fall the lawn mower (John Deere 318 with 42" 3 blade deck) at the cabin started squeeling and not cutting. Looked at the big belt connecting the front pulley to the deck. It was really ratty looking. So brought the mower home. It sat until this spring. Spent $40 and put new OEM belt on. Realized only the middle blade will turn. Took off deck and there is an intermediate belt. Spring on the tensioner for that belt was broken and that belt was melted. Figured it was the tensioner spring failure that destroyed that belt. Replaced tensioner spring and intermediate belt. Test mowed for 15 minutes. Perfect. Took it to the cabin. Mowed perfectly for 15 minutes and then started smoking.

    Take it all apart in the middle of the unmowed grass and mosquitos. One of the spindles was seized. Probably took out two two belts and a tensioner. But in the midst of all that had some periods were it was working.

    (will omit details from this morning of pressing apart the seized spindle and two good ones. Just will say seized spindle came out. "Good" ones blew the end off the bearing housing. $350 for two new assemblies instead of $12 of bearings.)

    I'd look at what the belts are turning.
    I got tired of replacing the 6203 bearings twice a year and the housings were shot anyway, made new ones using 6205 bearings. they are so free that you can spin the blades with a blow gun when the belt is off. The tensioner has a new spring and all the idlers have new bearings. I changed the belt when I did all the work because the original was all burned up from the blade bearings seizing up all the time before the bearing up grade. At least it never broke.

  18. #14
    Join Date
    Jan 2007
    Location
    Norfolk, UK
    Posts
    21,387
    Post Thanks / Like
    Likes (Given)
    16754
    Likes (Received)
    17461

    Default

    Looks like you need some pukka ''mower belts'' Moonlight

  19. #15
    Join Date
    Nov 2007
    Location
    marysville ohio
    Posts
    10,669
    Post Thanks / Like
    Likes (Given)
    2984
    Likes (Received)
    7376

    Default

    Quote Originally Posted by Limy Sami View Post
    Looks like you need some pukka ''mower belts'' Moonlight
    Yeah I'll be ringing up the big green rape store for a belt this morning.

  20. #16
    Join Date
    Oct 2005
    Country
    UNITED STATES
    State/Province
    Pennsylvania
    Posts
    21,978
    Post Thanks / Like

    Default

    Quote Originally Posted by moonlight machine View Post
    Yeah I'll be ringing up the big green rape store for a belt this morning.
    I hear they come with a 3-pack of "Green & Yellow underwear" these days....

  21. #17
    Join Date
    Nov 2019
    Country
    CANADA
    State/Province
    Ontario
    Posts
    635
    Post Thanks / Like
    Likes (Given)
    993
    Likes (Received)
    153

    Default

    Quote Originally Posted by moonlight machine View Post
    Yeah I'll be ringing up the big green rape store for a belt this morning.
    check your bearings....... the shaft bearings in the newer style john deeres are garbage. it has a grease fitting on the high end ones, but doesn't help when the bearings have dual shields.
    but that being said, bad bearings make the belt jump and put a snapping tension on them when started causing them to break. also belt alignment and good tension is key to long life.

  22. #18
    Join Date
    Aug 2004
    Country
    UNITED STATES
    State/Province
    Virginia
    Posts
    2,846
    Post Thanks / Like
    Likes (Given)
    230
    Likes (Received)
    1322

    Default

    Just a thought here. On two occasions I have put belts on mowers and gotten the belt on the wrong side of the "stubs" that run close to the pulley to keep the belt from jumping off. They work, but sure don't last long. Not once folks but twice. Brilliant.

  23. #19
    Join Date
    Jan 2005
    Location
    Houston
    Posts
    7,023
    Post Thanks / Like
    Likes (Given)
    1285
    Likes (Received)
    4014

    Default

    I don't have an answer, but if they are failing that quickly, it's more than just the belt brand. I've used lots of belts in a similar application (my Cub Cadet and Land Pride mowers) and the big difference between brands was the cheaper ones would tend to slip even when properly tensioned. Assuming you are using Kevlar belts....you problem lies elsewhere.

    By 'break' do you mean shred apart or snap in a clean break or? The way it failed can give clues as to why it failed.

  24. #20
    Join Date
    Nov 2010
    Country
    UNITED STATES
    State/Province
    Virginia
    Posts
    151
    Post Thanks / Like
    Likes (Given)
    217
    Likes (Received)
    45

    Default

    I had some rust on a pulley that destroyed belts in short order. Cleaned up the rust and belts last. Probably unlikely under the tractor, but worth feeling around.


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
  •