maine home 0 #1 Posted 4 hours ago Hi, I'm burning up PTO belts on a GT1600 mower. Could the pulleys by the tighter be worn out? The outside belt keeps jumping to the inside pulley? Would also like to know what the adjustment on back of deck is for? Thank you Share this post Link to post Share on other sites
peter lena 9,915 #2 Posted 4 hours ago @maine home seams like spindle bearing , lubrication failure , incremental , bearing , stop / start 'probably causing belt jump . not familiar with your unit , would bet on combined rotational drag , what model mower do you have , brand ? pete Share this post Link to post Share on other sites
ebinmaine 79,301 #4 Posted 3 hours ago We don't use the mowing deck here but others will be along soon. @MainelyWheelhorse @Blue Chips @midpack Another Mainer here. Share this post Link to post Share on other sites
Bill D 2,949 #5 Posted 3 hours ago Welcome. Any pictures? They are very helpful when diagnosing issues like this. Share this post Link to post Share on other sites
midpack 1,147 #6 Posted 3 hours ago IIRC the adjuster on the back of the deck is to level it. The belt jumping, is that in the mule drive? Check that the pulleys were put on in the right order. I had one that was mixed up before I got it. I also had a rear discharge that I put on so that the blades were turning backwards. I finally put an arrow with magic marker on the deck to clarify which way to put the belt on Share this post Link to post Share on other sites
MainelyWheelhorse 2,727 #7 Posted 2 hours ago (edited) 1 hour ago, maine home said: Hi, I'm burning up PTO belts on a GT1600 mower. Could the pulleys by the tighter be worn out? The outside belt keeps jumping to the inside pulley? Would also like to know what the adjustment on back of deck is for? Thank you @maine home Hi fellow Mainer! What size is the mowing deck? Pictures of your setup should definitely help us figure out what’s wrong. There could be many things that could cause the belt to jump. The smaller 37’ inch deck use one belt from the PTO to the deck. The bigger ones like the 42” inch ones use two. One from the PTO to the front most middle pulley on the deck, and one just on the deck to run the mowing blades. The belt from the PTO to the deck is on the mule drive. If it’s jumping, something could be wrong with the pulleys. If it’s the mule drive it might not be tight enough, or something is off there. There’s a few possibilities. Edited 2 hours ago by MainelyWheelhorse Share this post Link to post Share on other sites
Blue Chips 784 #8 Posted 2 hours ago Welcome, fellow Mainer. All of the above comments are worth considering. Post a picture or two if you can. Make sure the photos show how you're routing the belts. This thread is reminding me that our front lawn is getting deep enough to hide a large groundhog and needs some attention from my mowing deck. 3 Share this post Link to post Share on other sites
