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Gravely ZTHD 52 spring on hydro-drive tensioner keeps breaking...

#1

A

abgar

Anyone had issue with this? 800hrs in, no prob. First one broke and went through three replacements so far in just a few weeks. Belt is in good shape, going to replace it anyway. Nothing binding up hydros. What would make a spring (or several) break in such a short period of time?

Part is EXTENSION SPRING 08300507, runs between anchor bolt and tensioner bar for hydro-drive belt pulleys.

Any input is appreciated!


#2

T

tbzep

abgar said:
Anyone had issue with this? 800hrs in, no prob. First one broke and went through three replacements so far in just a few weeks. Belt is in good shape, going to replace it anyway. Nothing binding up hydros. What would make a spring (or several) break in such a short period of time?

Part is EXTENSION SPRING 08300507, runs between anchor bolt and tensioner bar for hydro-drive belt pulleys.

Any input is appreciated!
Click to expand...
I broke one last year with less than 10 hours on my mower. Dealer gave me a new one and it's still going. I've heard they had a batch of springs with bad metal, which would explain your issue, but I have no idea if that's true.


#3

C

Camilo13

abgar said:
Anyone had issue with this? 800hrs in, no prob. First one broke and went through three replacements so far in just a few weeks. Belt is in good shape, going to replace it anyway. Nothing binding up hydros. What would make a spring (or several) break in such a short period of time?

Part is EXTENSION SPRING 08300507, runs between anchor bolt and tensioner bar for hydro-drive belt pulleys.

Any input is appreciated!
Click to expand...

Go to Tractor Supply and buy one of their off the shelf springs. The spring will have a fixed end and not a swivel. You will have to take a pair of vice grips and modify the hook end to fit. My factory original Gravely spring broke after just 3 months and I have been using the one from Tractor Supply for more than 1 1/2 years and no problem.


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