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Blades lose power when deck lowered

I have a troy bilt riding lawn mower that is a couple of years old. Recently when I engaged the blades they would not turn. I cleaned a lot of debris from under the deck and then it would turn, but only at a high level (over 4) and the lower I went the slower the blades would go. I took off the deck and cleaned out more debris and greased the bearings. I put the deck back on today and now it will only turn at a high setting. All the belts are on properly. Any thoughts.

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  • goldendvm007 Oct 01, 2009

    Why new belts - do you think the belt is stretched out?

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  • Master
  • 472 Answers

SOUNDS LIKE YOU NEED A NEW BELT

Posted on Oct 01, 2009

  • mickey813
    mickey813 Oct 02, 2009

    YA THATS WHAT IT SOUNDS LIKE

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Your lawn tractor will have a lever that raises and lowers the mower deck which houses the two cutting blades. By lowering your mower deck to the desired cutting height, the blades should automatically engage. By raising the deck back to it's highest position, the blades will automatically disengage. Should be simple enough. You can consult your mower manual. If you don't have one, you can easily find it online using the make, model and year of the lawn tractor.

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sounds like wrong belt you raise it belts tighter lower belts looser or the tensioner has come loose

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I have a troy bilt riding mower blades will not engage in the 1 or 2 deck setting


There is a spring attached to a tensioner that probably came unhooked while changing the belt. Higher deck settings push the deck backwards enough to spin the blades, the lower setting need the spring tensioner to take up the slack in the belt.

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I have a troy bilt 17.5 hp pony riding manual lawnmower and my belt located above the deck keep jumping off track after engaging the blades a couple of times,do i need to tighte my belt,if so how?


Those units are self adjusting. No way to adjust it. It sounds like you have a bad idler pulley or a bad spindle bearings, which would cause the pulleys to be out of alignment.

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I have Troy Hydrostatic 46" when I attempt to


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Post back.
Gary

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I have a troy bilt 42 inch 17 hp lawn tractor. The problem is when I cut grass and i get in some thicker grass the blades turn off then I back out the blades restart. The engine never bogs down


One or more of your drive belts is in need of adjustment or replacement, maybe. Possibly, your electric (or manual) PTO clutch could also be adjusted. You do have the spring tensioner on the deck engaged, right? You say the engine doesn't bog when this happens so I am inclined to think "clutch" and/or "PTO belt" to the deck and/or the "deck tensioner" are the things to check.

The tensioner will be the easiest, it is a handle on the left side ON the deck. Has a BIG spring on it. Make sure it is engaged.

Is yours a Troy Bilt manufactured in Troy New York or is it another manufacturer (MTD?). Troy Bilt is actually out of business, having sold the Troy name to a variety of makers depending on the model line. I don't have the run down on who makes what any more (tillers, chippers, mowers, blowers, trimmers, etc.), but Troy Bilt of Troy, NY is no more. :-(

I have a 16 HP Troy with 42 inch deck driven through a electric clutch. I also have a "grass pump" on my deck. Important maintenance tips: Keep the bearings greased, keep the deck clean underneath. The belt on the deck should have the tensioner released when you are NOT mowing. Keep the blades sharp and in good repair. Mow with engine at full speed. When you get to areas of heavy growth, slow the tractor down (hydro drive) or reduce to a lower gear (gear drive). NEVER adjust speed using the "clutch" (hydro drive or gear drive). When you engage the blades (electric or manual) always have the engine just above idle, bring the engine speed up slowly to preserve the belts and reduce stress on all components.

I am sure this is the fix for your trouble. If there is anything else or if I missed the ball, please let me know and we will go further.

Thanks for your question @ FixYa.com

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