Register free!
Search
 
     

The Green Industry's Resource Center


Click for Weather
Reply
 
Thread Tools Display Modes
  #1  
Old 04-10-2010, 09:30 PM
dk2679 dk2679 is offline
LawnSite Member
 
Join Date: Apr 2010
Location: Brownsburg, IN
Posts: 5
Blades won't turn off on Bunton WB

I have a early to mid 90's Bunton Walk Behind and the blades will not turn off. It is a pull start and the blades are engaged when i start it even though lever is in the off position. Any suggestions would be greatly appreciated.
Reply With Quote
  #2  
Old 04-10-2010, 09:46 PM
topsites topsites is offline
LawnSite Fanatic
 
Join Date: Mar 2005
Location: Richmond Virginia
Posts: 21,677
I'm assuming it's a hydraulic clutch, in which case it's probably a bad switch.
Try unhooking one of the cables and see if it will let go.

But you said a lever?
What the hell ...
Have you tried pulling it the other way to see if it will disengage the belt?

I mean you're going to have to pull the deck cover off and see what is down there,
the entire mechanism isn't too complicated, might just be stuck or a piece broken.
Reply With Quote
  #3  
Old 04-10-2010, 09:50 PM
Jason Pallas Jason Pallas is offline
LawnSite Bronze Member
 
Join Date: Jan 2001
Location: Grosse Pointe. MI
Posts: 1,321
Electric Clutch or manual? Makes a big difference. I have owned both (Buntons) I can help you - but need to know which.
Reply With Quote
  #4  
Old 04-10-2010, 09:55 PM
dk2679 dk2679 is offline
LawnSite Member
 
Join Date: Apr 2010
Location: Brownsburg, IN
Posts: 5
I'm no mechanic by any means but here is what I am seeing. The lever is connected to 2rods down to a tensioner pulley??? When you engage this lever the pulley then tensions the belt from the crankshaft to the middle blade. Then another belt is underneath the middle blade spindle which runs to the other two blades. When I try and pull start the mower the belt from the crankshaft to pto to middle blade spindle is turning therefore all blades are turning as I am trying to start the machine.
Reply With Quote
  #5  
Old 04-10-2010, 09:56 PM
dk2679 dk2679 is offline
LawnSite Member
 
Join Date: Apr 2010
Location: Brownsburg, IN
Posts: 5
manual clutch
Reply With Quote
  #6  
Old 04-11-2010, 09:21 AM
dk2679 dk2679 is offline
LawnSite Member
 
Join Date: Apr 2010
Location: Brownsburg, IN
Posts: 5
bump


Reply With Quote
  #7  
Old 04-11-2010, 09:38 AM
Jason Pallas Jason Pallas is offline
LawnSite Bronze Member
 
Join Date: Jan 2001
Location: Grosse Pointe. MI
Posts: 1,321
OK there are several belt guides along the path of that middle belt (from the engine to the middle pulley/spindle). There are two on the deck near the pulley and there are a couple underneath the engine deck. My guess is that one of these have loosened up and moved out of place..... or that the belt has slipped over one of these guides.
Check the belt path to see that this has/has not happened. If it has, you'll need to loosen the guides with a wrench and then re-position them. To do this you'll need to engage the blades and then adjust the guides so that they are about 1/2 inch away from the belt (when tight/engaged). When the blades are then disengaged, these guides will them force/slack the belt off pulleys. This adjusting process is not an exact science - you may need to play with these adjustments to get the slack and tension just right.

Note: There is also a threaded rod that runs down to the bellcrank on the deck (that tensions the belt). There is an adjustment here that you can play with too. You'll need to pull the lynch/hitch pin out and loosen/tighten the nut - again, you'll have to play with this adjstment.

Post your results/questions back here. Hope this helps.
Reply With Quote
  #8  
Old 04-11-2010, 09:54 AM
topsites topsites is offline
LawnSite Fanatic
 
Join Date: Mar 2005
Location: Richmond Virginia
Posts: 21,677
If all else fails, take it to the shop.
Reply With Quote
  #9  
Old 04-11-2010, 10:47 AM
dk2679 dk2679 is offline
LawnSite Member
 
Join Date: Apr 2010
Location: Brownsburg, IN
Posts: 5
OK, here is what I have. I am assuming the belt guides are suppose to be outside of the belt itself, which they are. I played with a few adjustments and it looked like the tensioner pulley on the deck was possibly contacting the belt a little too much. So I had my wife push back the tensioner pulley so there was no tension on the belt at all. I started the mower and it started pretty much as it should but the belt is now sqeeling where the belt goes underneath the engine. So I guess I'm trying to figure out why this belt/pulley are turning when I start the mower???
Reply With Quote
  #10  
Old 04-11-2010, 12:04 PM
Jason Pallas Jason Pallas is offline
LawnSite Bronze Member
 
Join Date: Jan 2001
Location: Grosse Pointe. MI
Posts: 1,321
Is this a new belt or has it been replaced recently?
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump





Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ©1998 - 2012, LawnSite.comô - Moose River Media
All times are GMT -4. The time now is 10:03 AM.

Page generated in 0.09482 seconds with 7 queries