When you raise the front or rear of the tractor, and push on the belt (engine off of course), is there a lot of play or slack in the drive belt. At this point from what I have read, the issue is the drive belt, and is slipping when in gear and when it heats up. The next thing to do would be to replace the belt, but I not sure if this procedure is an option for you. When you inspect the under side of the tractor, and inspect the moving parts and pulleys, if any of these components are in need of replacement, you will be able to tell by either rotating them manually or visually inspecting them. At this point due to the low hours, I suspect the drive belt is stretched out, and is considered a maintenance replacement part procedure.
It could be the drive belt yes. If I remember correctly Husqvarna uses a hydrastatic transmission which means it could also be the transmission being low on oil as well or the pump going out. Your best bet would be to have this Tractor checked by a service tech or get a manual on serving that model from Husqvarna before proceeding.
I'm only really recommending you get a manual from them so you can locate the fill point on the Transaxle to add fluid if needed. It should use a standard 90 weight like the rear differential in your car. As far as changing a drive belt you can get a replacement from most major hardware stores and sometimes Walmart. To replace the old one you have to drop the cutting deck and remove the retainers from the blade drive pulleys to remove the drive belt. Once you have the deck out you should be able to see and access the spring loaded tension pulley and remove the old belt and replace it. Put everything back together reversing the steps you previously took. Follow the user manual instructions for leveling the deck and make your height adjustments to the cutting deck. This sounds like the transmission is the problem but there is nothing wrong with eliminating the drive belt as that problem.
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Sounds like you just need to lube it some. You have clutch pedal and when it pushed in all the way it stops. As you let it out it goes faster and faster. There are springs which may not be pulling the idler pulley where it's supposed to go for the faster position. With the engine off look at the linkages that move when you push and release the pedal and make sure everything is moving as far as it will.
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The mower is still running very slow with the rpm's set high. It appears that something may be slipping?
I tried lubing everything on the under carriage like one other person suggested and I started it up. It ran fine for about another 1/2 hour before it started to slow down again. Same symptoms as before. It was barely crawling along and I stopped it for a moment and put it in reverse and backed up a short distance. I then put it back in Forward and it ran fine again. Yhere's less than 80 hours on the motor. Yes, I know I can take to the dealer, but they want $75 just to pick it up from my home and another $100 just to diagnose the problem. They want $150 to change the drive belt. If it's the transmission, then I may as well juk it as I could never aford to get it repaired. I'm trying to get this done as economically as I can by trying to do this myself.
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