There is a long rod on the left side on the deck. That is like a belt tenioners just move it an you have a lot of free play. Put the belt on pully and replace the rod back in it's spot it takes all the free play out.
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the belt is routed around both blade pulley rear of belt routed to inside of pully tensioner front of belt routed to moter clutch or or in some cercumstance it is totaly the wrong belt and thats what i think your problem is i think you got to short of a belt
The bearings may be bad and freezing up, this will cause the belt to smoke and tear up as well as make the pulley wobble . Does it smell like burning rubber ?? If not then you have a pulley out of line and or a pulley that's cracked or broken. Also check and make sure the deck pins are all in place and the locks are down on the quick release on front and side of deck. While the blades are disengaged turn all the blade hubs and pulleys to see if the turn fairly easy. Check for play or wobble in the pulleys and blade hubs(bearings and blade shaft attach to these pulleys. Also check the idler pulley(also called the tensioner pulley for wear Hope this helps, plese post solved on fixya.com.So I get credit for a solved problem if it does. If not, check back and give me more info.
It is absulutley possible, cheap belts have a different diameter through out there length and will set up a vibration, also slack belts will set up vibrations, you also need to the check the balance of the blades, and the condition of the blade pulleys
There should be 4 pulleys.2on the deck that are above the blades,put the belt on those first.
There should be a tension pulley,with the engine OFF,look on top of the deck and engage the blades.Note the direction the tension pulley moves,the belt must pass inside that pulley.Now disengage the blades and put the belt on the engine pulley.
Normally there is no adjustment for a belt that drives the cutter assembly, the problem is the belt has stretched out and is no longer tight enough to engage the blade sufficintly, in which case it needs to be replaced. Hope This Helps Don
Ranch King is a brand name of the manufacturer MTD.
Product manuals with part blow-up diagrams are available from MTD's web site, http://www.mtdproducts.com/ Models are identified from the model number printed on a label under the mower seat.
The PTO and deck drive belts are shown on one diagram and the transmission drive belt is shown on another. The Form number on my printed Operator's Manual is 770-10526A (22HP, 46in cut) for Hydrostatic 817/818 models.
Parts can be ordered directly from MTD or other distributors on the web.
It is my experience that original brand name MTD belts work best.
The 22HP, 46" mower deck Ranch King Pro has 3 belts:
The drive belt which runs from the engine pulley back to the hydro drive unit to provide over-the-ground propulsion is part #754-0349.
A mower has either an electric PTO or a manual PTO, not both.
The electric PTO belt the provides power to the blade deck (runs around the electric clutch on the engine shaft (activated by electric switch, not the mechanical hand lever that engages the mower deck) is p/n 754-0476 for the 46" deck.
The manual PTO belt the provides power to the blade deck (runs off the pulley on the engine shaft (activated the mechanical hand lever to the left of the steering wheel that engages the mower deck) is p/n 754-0228 for the 46" deck.
The deck belt that goes around the 3 blade spindle assemblies on the mower deck, to drive the grass cutting blades is p/n 754-0349
In my experience, the PTO belt lasts about half a season, the other belts break about every other season when mowing 4 acres weekly.