The Old Lawnmower Club
Collection, Preservation and Display of Old Lawn Mowers

Webb 24" clutch pully assembly

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Robert Stanford

Please can anyone tell me what parts are missing/not original specification on a Webb 24" ride on with a Briggs and Stratton engine. We were given the mower to cut the strip for our model aircraft strip. It has done an excellent job for the past 2 years. Recently, we have had issues with belts slipping and prematurely failing. This seems to be down to someone bodging the clutch pully. 

I've attached photos of the disasembled mechanism but have no idea of what should be there or if it was assembled correctly. 
 

  1. I am assuming that the bolt should not have a threaded shank which seems to have been acting as a file?
     
  2. What size hole should be in the metal cheek plates for the pully (why are do they have a hole off centre)?
     
  3. The sleeve bearing that was in the centre of the pully is only half the width of the pully. Should there have been a second one or is this some sort of mechanism for keeping equal tension on both belts?
     
  4. What have I missed?

 

Does anyone have a manual or exploded parts diagram that they could share?

Where can I get spare parts? A club member has offered to make any replacement parts but genuine parts would be better.

 

 

 

 

 

 

 

 

 

 


 

Forums

Mowing Wurzel Sun, 15/06/2025

FAQ'S

  1. I am assuming that the bolt should not have a threaded shank which seems to have been acting as a file?
     

    Have searched, but cannot find a parts book, thought I had one,  I'm sure there may be some photos on the Forum on other peoples machines.        Like your assumption, a set screw is a bodge and like you, I would have thought had a sholdered bolt.  as the steel pin the bolt or set screw in this case, secures the trunion the bearings / bushes  move on.

  2. What size hole should be in the metal cheek plates for the pully (why are do they have a hole off centre)?

    Other enthusiasts may know.   I would make everything  sligt interference fit to stop it going around and wearing away again.
     

  3. The sleeve bearing that was in the centre of the pully is only half the width of the pully. Should there have been a second one or is this some sort of mechanism for keeping equal tension on both belts?
  4. Cannot remember,  but should be bushed both ends,   if you want to rebush over full moving service, this would be good, providing regular lubrication.
     

  5. What have I missed?

    Looks like an easy fix,  I'm sure somebody has a parts book.