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Gravely 450 Commercial Adjustments


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#1 KennyP ONLINE  

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Posted February 21, 2016 - 04:58 PM

Where do you find the info to adjust the FWD/REV? I moved the tractor the other day and it didn't want to go at first. Then it took off, but stopped on it's own. Moved the Fwd/Rev lever back and it backed. Went back to Fwd and it took off again. I can't find anything in the 4-wheel manuals on how to adjust the linkage.



#2 KennyP ONLINE  

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Posted February 21, 2016 - 05:13 PM

Here's some pics of what I am talking about.

This is locked into FWD.

DSCN1484.JPG

 

Neutral.

DSCN1485.JPG

 

And locked into Rev.

DSCN1486.JPG

 

I found one adjustment procedure for an L, but the linkage is different.



#3 Eric OFFLINE  

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Posted February 21, 2016 - 06:40 PM

Not familiar with your tractor but have worked on many flight and drive control linkages. This seems to be pretty straight forward, looks like you have nuts for adjustment on the rod and another nut to lock in said adjustment. Start with forward if it won't go in adjust the nut that makes contact when shifting to forward a few turns and lock it down test and repeat until you work your way through all movement cycles. Just my opinion but you can only learn by trying and with a bit of patience I have faith you will be teaching us all the procedure before long. Good luck. Eric.

#4 Gtractor ONLINE  

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Posted February 21, 2016 - 06:48 PM

In your first pic you have to loosen the double nut on the top of the linkage and adjust more pressure [downward]on the spring.  There is no detent inside the trans.  Just the external linkage going over center is what locks it in gear.

 

Well, crap!  I said that exactly backwards.  :wallbanging:

 

Forward is the bottom side.  You need to put more pressure on the bottom spring.  Your adjustment is the double nuts visable in the bottom center of the pic but partially hidden by the brake rod in the first pic. 

Lock the tractor in reverse and I think you can get to those nuts better.  Turn them towards the spring about two rounds and try that. 

When correct the spring needs compressed some but not bottomed out.


Edited by Gtractor, February 21, 2016 - 06:55 PM.

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#5 Cat385B ONLINE  

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Posted February 21, 2016 - 07:12 PM

It's only giving you fits because you haven't named it yet. Jealousy is a bad thing..... 


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#6 KennyP ONLINE  

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Posted February 21, 2016 - 07:24 PM

In your first pic you have to loosen the double nut on the top of the linkage and adjust more pressure [downward]on the spring.  There is no detent inside the trans.  Just the external linkage going over center is what locks it in gear.

 

Well, crap!  I said that exactly backwards.  :wallbanging:

 

Forward is the bottom side.  You need to put more pressure on the bottom spring.  Your adjustment is the double nuts visable in the bottom center of the pic but partially hidden by the brake rod in the first pic. 

Lock the tractor in reverse and I think you can get to those nuts better.  Turn them towards the spring about two rounds and try that. 

When correct the spring needs compressed some but not bottomed out.

I thought those were the adjustments, just not sure how far to go with them. Thanks!

 

It's only giving you fits because you haven't named it yet. Jealousy is a bad thing..... 

It is now known as 'Ol Yeller'!


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#7 PaulL OFFLINE  

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Posted February 22, 2016 - 12:34 AM

The instructions for adjusting the Fwd/Rev lever are in the Service Manual.  You can find it at www.gtcoa.com through the Manuals tab.  Go to Riding Tractors > 400 Series Garden Tractors > 424,...450 Service Manual (Sept 1972)  Its on pages 54 and 55.


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#8 KennyP ONLINE  

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Posted February 22, 2016 - 06:04 AM

I think I have that manual! I'll look again, thanks.

 

Found it! Got it printed out now! Thanks everyone!

 

And naming it did help!


Edited by KennyP, February 22, 2016 - 06:25 AM.

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#9 KennyP ONLINE  

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Posted February 28, 2016 - 11:42 AM

I went out to steal the remaining weights from 'Ol Yeller' this morning and while there I adjusted the springs. I'll see if this helps soon.

DSCN1490.JPG

 

The distance between nuts is what I adjusted out of it.






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