wobbling mower deck? - Lawn Mower Forums : Lawnmower Reviews, Repair, Pricing and Discussion Forum
Register Home Forum Active Topics Lawnmower Reviews Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools
Old 08-27-2012, 08:37 PM   post #1 of 8 (permalink)
Junior Member
 
Join Date: Aug 2012
Location: NC Triangle
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
Default wobbling mower deck?

I've got a Craftsman 917.273080 with 46 in mower deck that has started wobbling/vibrating as soon as the electric clutch is engaged. I thought it was out of balance blades but I replaced them and it still wobbles. I've also replaced all idler pulleys. There is no obvious reason for this wobble, everything seems tight. The drive belt and center idler pulley are jumping around like crazy making the whole deck shake. I can mow with it but it sounds and feels like the deck is going to come apart it is vibrating so bad. What's causing my problem.
mick1putt is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 08-27-2012, 09:24 PM   post #2 of 8 (permalink)
Member
 
Join Date: Jul 2010
Location: Nuevo, Ca (So Cal)
Posts: 71
Thanks: 0
Thanked 1 Time in 1 Post
Default

Could be a few things. Bad bearing in one of the mandrels, idler pulley has a flat spot on it, belt missing a chunk, bent/way out of balance blade...or if you hit something REALLY hard, a bad/bent spindle shaft. Carefully check all of the above.
themidniteryder is offline   Reply With Quote
Old 08-28-2012, 12:32 AM   post #3 of 8 (permalink)
Junior Member
 
Join Date: Aug 2012
Location: NC Triangle
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
Default wobbling mower deck?

Blades are new with only a few hours on them and in good shape. Belt is in good shape. I thought it was one of the idler pulleys and decided to replace them all, they are in new condition, but I will double check for a flat spot. No bent spindle, and all bearings seem to be good but how would I know for sure? Everything seems tight, no wobble in any individual bearing or pulley, all blades turn freely by hand. The spring on the idler pulley seems ok but it is old and might have lost some of it's tension, allowing that idler to move more than it should. Could that be it?

Motor runs good and smooth. I thought it might be in the clutch but it is working fine.
mick1putt is offline   Reply With Quote
Old 08-28-2012, 08:05 PM   post #4 of 8 (permalink)
Member
 
Join Date: Jul 2010
Location: Nuevo, Ca (So Cal)
Posts: 71
Thanks: 0
Thanked 1 Time in 1 Post
Default

Did you pull the belt when you checked the spindles for side play? If there is tension on the belt you might not feel the looseness.
themidniteryder is offline   Reply With Quote
Old 08-29-2012, 06:43 AM   post #5 of 8 (permalink)
Junior Member
 
Join Date: Aug 2012
Location: NC Triangle
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Yep, the belt's been off many times throughout my investigation. I'm about to go back to the blades. Even though they are new, could they be out of balance bad enough to cause this?
mick1putt is offline   Reply With Quote
Old 08-29-2012, 01:05 PM   post #6 of 8 (permalink)
Member
 
Join Date: Jul 2010
Location: Nuevo, Ca (So Cal)
Posts: 71
Thanks: 0
Thanked 1 Time in 1 Post
Default

I wouldn't think so, but it never hurts to check the balance. While you have all the blades of, turn the deck on and see if you still have the vibe without the blades on?
themidniteryder is offline   Reply With Quote
Old 08-30-2012, 06:50 AM   post #7 of 8 (permalink)
Junior Member
 
Join Date: Aug 2012
Location: NC Triangle
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Good point, already tried that and the deck still wobbled. I guess it's not the blades. This one has me stumped.
mick1putt is offline   Reply With Quote
Old 08-30-2012, 11:58 AM   post #8 of 8 (permalink)
Member
 
Join Date: Jul 2010
Location: Nuevo, Ca (So Cal)
Posts: 71
Thanks: 0
Thanked 1 Time in 1 Post
Default

You have the double belt system right, engine to deck belt then the deck has a second belt that drives the blades? If so, remove the belt that drives the blades and turn the deck on. Still wobble?
themidniteryder is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

Thread Tools

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
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 08:42 AM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.6.0