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  #1  
Old 05-22-2019, 10:30 AM
J-Marsh J-Marsh is offline
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Default Loss of forward drive.
Hi,

I have a Front cut FMZ50 zero turn CubCadet, model 17C14BFP603, I believe it is manufactured by MTD of Germany, and is equipped with a hydrostatic transmission system.The machine has behaved impeccably\well almost for 8 years, but I am now experiencing loss of forward drive, it is very sluggish, but in reverse as responsive as ever.
I replaced the drive belt but this has not rectified the problem. I also checked the oil in the transmission tank, and that is up to the required level.

Any advise would be most welcome, thank you.
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Old 05-22-2019, 11:13 AM
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cooperino cooperino is offline
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I am not familiar with this machine. However, If it is hydro static it should have similar relief valves as other types of cubs. Locate the relief vales and see if one of them is wet with hydro fluid. If not it could be a bad relief valve.
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Old 05-22-2019, 11:15 AM
J-Marsh J-Marsh is offline
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cooperino ..Thank you for your suggestion, I'll take a look into that.
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Old 05-22-2019, 01:28 PM
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ironman ironman is offline
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Originally Posted by cooperino View Post
I am not familiar with this machine. However, If it is hydro static it should have similar relief valves as other types of cubs. Locate the relief vales and see if one of them is wet with hydro fluid. If not it could be a bad relief valve.
Zero turn mowers have two transmissions, one for the right and one for the left axles. These hydros are of the newer style and do not have external relief valves, just rods and levers to release it internally.

Since the problem is only in the forward direction I would look for something control wise that would be common to both transmissions, starting at the forward motion foot pedal. Likely a broken or out of adjustment linkage connection.
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Old 05-22-2019, 01:51 PM
J-Marsh J-Marsh is offline
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ironman...Fingers Xd it might be that, I'll certainly make that my starting point, thank you both for your replies, I'll let you know the outcome.

Thinking about it, I've had the impression at times that the right hand drive wheel is not giving the drive that the left hand drive wheel is.
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Old 06-09-2019, 02:15 AM
J-Marsh J-Marsh is offline
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Gentlemen, just to bring you up to speed, it did turn out to be a partially stuck linkage, so thank you both, ironman, and cooperino,your input was very much appreciated.
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