Seat spring replacement

Zachary Hoyt

Well-known Member
The spring on the seat of my 300 row crop broke last week when I sat down on the seat preparatory to moving a log out of the woods. Luckily the tractor was not moving at
the time, I had been hooking the log to the arch and was about to drive away. I ordered a new spring on eBay and it came today. It is stiffer than my old one which is good,
but I was not able to get it in until I disconnected the shock absorber. Even with the shock pulled out and me sitting on the seat the holes are about 1" apart. Is there a better
way to do this, and is the shock really needed? I will be grateful for any advice.
Zach
 
IIRC the flatter 300/350 seat system requires a different spring than an H. were it me I would heat top coils with a blue flame wrench till it compressed enough to suit. It may take more than that in that it could require some coils to be cut off (1/2 revolution at a time. Put weights on it about 1/3 heavier than your weight. that allows you to look at it with out getting a strained neck. Jim
 

Get a guy built like me to sit in the seat... or have someone hand you a couple sacks of cattle cubes while you're sitting on the seat.

Good luck.
 
Thanks, that's a good idea. I'm 200 pounds, but I'll be going to the feed mill soon and picking up 600 pounds or so in 50 pound bags, I should be able to add enough of them
to do the job.
Zach
 
Thanks for the suggestions. I don't think I can cut it shorter unless I also make the top bigger to fit the underside of the seat. It seems comfortable now with the stronger spring without the shock hooked up, but if I can get it connected that seems like the right thing to do. Having the seat extra high like it is now is good except about the shock, it makes my knees happier since I'm 7 feet tall. Thank you very much.
Zach
 
Yes, you need the shock, in fact you should replace that also. The ride will be MUCH improved. I'll bet the old shock goes in and out with little or no resistance. You should also replace all the bolts, if one of them brake it's just like the spring braking-very dangerous. If their are rubber grommets, replace them also.

David
 
Zach,where did you buy the heavier spring. The spring on my Super has gotten really weak. It bottoms out with my 150 pounds.That is just sitting in the yard. Out in the field it is worse.
 
Yap , like others have said replace and rebuild all of seat parts . I had the spring break on my farmall M while out in field cutting hay . I just about fallen off the tractor . Not a good experience .
 
The old shock still takes some force to extend by hand, but I don't know what it was like when new. I'll see if I can get it hooked up.
Zach
 
There's only one spring for all those types of seats. Used to be they were too mushy. Wonder if the Chinese factory that's making them took some poetic license with the specifications.
 

If the new spring is painted black, it is intended for heavy duty operators. The spring that is painted red is for light-weight operators. Originally there was 5 different springs available, identified by notches at the bottom of the spring. You could choose the spring that was correct for YOUR weight.
 
I think the 300 uses the same spring as the 450. I totally rebuilt the seat action of my 450 and got everything from Bates Corp. Bourbon, Indiana. From what I was told there is only one spring available. The spring in mine is very stiff and I weigh about 220 lbs. and I barely make seat move maybe 1 1/2".
cvphoto8915.jpg
 
They all take the same the spring. The spring that fits the C fits everything up to a 560 with standard seat. It makes no difference who you go through there is only one spring.
 

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