Hello everyone. I have lurked here for a while while deciding on a tractor to purchase and then locating one. Based in part on the wealth of info and desire to help others that is found here, I just purchased a 1980 448 / M48 combo with a 3 point hitch. The rear hydraulic control valve came disconnected from the tractor and I suspect an extra part is needed to attach it. I'll address this later because the current problem is more pressing. When I first mowed with it my grass was a tad overgrown. I started at the highest setting and made several passes to avoid overloading the system. This worked OK for about half an acre but now when some heavier load hits, the drive belt that comes off the engine stops. I have done a search here and for online manuals but can't find anything. If someone could point me in the right direction I would be grateful. :thanku:
New To Me 448 / M48 with problem
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Sounds like the PTO clutch needs adjusting. I assume you have the Onan engine. PM me your E-mail and I will send you the clutch manual. Welcome to the forum.
I agree that it sounds like there is an issue with your clutch. I had a similar situation this spring when I purchased a used 448 with a 48" deck.
The deck was not installed on the tractor when I got it and when I hooked it up I found that the clutch had been taken apart and not assembled correctly. It took some time and the studying the manual to get it back together and working properly. Maybe it is just coincidence, but it seems like previous owners choose to sell when they can't or won't repair a failing clutch. Take heart, by taking the time to learn how to repair it correctly the results will be worth it.
I found the manual I needed on-line as a downloadable PDF file, but I don't recall where. I have the file at the office if you want a copy of the file let me know. I can tell you that you will need to take some time to get the clutch repaired correctly. Should you need them the parts are available from a number of sources. You will find references to two styles of clutches and you most likely have the later version that is adjusted with a torque wrench and does not require different sizes of shimming for adjustment. There are shims in the clutch stack and you will want to pay very close attention to the order that things come off so that you can get them back together correctly. You may want to sketch or photograph the assembly as you take it apart.
You will likely need to get a large, thin headed open end wrench to hold the large nut in the tight access area. There is also a fork with two small friction pads that contact the clutch plate and are not shown in the service manual I had. It is correct to be there and it is a brake that stops the deck rotation when the clutch lever is disengaged.
While things are apart inspect the deck spindles and bearings. I found that my deck needed new spindle bearings, new idler bearing/pulleys, and a new deck belt. I also found that the existing blades were not straight and replaced them too. Though the original owner may not have been willing to make the repairs needed to the 448, I now have a very nice mowing tractor for my 2.5 acre yard.
Good luck and enjoy your new (used) tractor!
Jeff
The deck was not installed on the tractor when I got it and when I hooked it up I found that the clutch had been taken apart and not assembled correctly. It took some time and the studying the manual to get it back together and working properly. Maybe it is just coincidence, but it seems like previous owners choose to sell when they can't or won't repair a failing clutch. Take heart, by taking the time to learn how to repair it correctly the results will be worth it.
I found the manual I needed on-line as a downloadable PDF file, but I don't recall where. I have the file at the office if you want a copy of the file let me know. I can tell you that you will need to take some time to get the clutch repaired correctly. Should you need them the parts are available from a number of sources. You will find references to two styles of clutches and you most likely have the later version that is adjusted with a torque wrench and does not require different sizes of shimming for adjustment. There are shims in the clutch stack and you will want to pay very close attention to the order that things come off so that you can get them back together correctly. You may want to sketch or photograph the assembly as you take it apart.
You will likely need to get a large, thin headed open end wrench to hold the large nut in the tight access area. There is also a fork with two small friction pads that contact the clutch plate and are not shown in the service manual I had. It is correct to be there and it is a brake that stops the deck rotation when the clutch lever is disengaged.
While things are apart inspect the deck spindles and bearings. I found that my deck needed new spindle bearings, new idler bearing/pulleys, and a new deck belt. I also found that the existing blades were not straight and replaced them too. Though the original owner may not have been willing to make the repairs needed to the 448, I now have a very nice mowing tractor for my 2.5 acre yard.
Good luck and enjoy your new (used) tractor!
Jeff
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2,237 Posts
http://groups.yahoo.com/group/casegardentractors/files/Belts - Clutch Manuals (PTO) /Clutch/
This link should get you to the manual you need. You will have to join the group to access these and loads of other files and information on you tractor. You also will find an abundance of helpfull members to help with any questions you may have.
Welcome to the group!
This link should get you to the manual you need. You will have to join the group to access these and loads of other files and information on you tractor. You also will find an abundance of helpfull members to help with any questions you may have.
Welcome to the group!
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1,529 Posts
Are you guys serious. The manual is right here:
http://www.mytractorforum.com/showthread.php?t=86397
http://www.mytractorforum.com/showthread.php?t=86397
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17,091 Posts
Apparently not anymore?
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4,744 Posts
Mr. Doyle was apparently so upset by what occurred in this thread that he pulled all of the manuals from that sticky. When I noticed what he had done, I asked SJ to delete the sticky since there was no longer any information contained in it that would be of benefit to members of this forum. John complied with my request.
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When I click on that link I get the following message:
you do not have permission to access this page. This could be due to one of several reasons:
Your user account may not have sufficient privileges to access this page. Are you trying to edit someone else's post, access administrative features or some other privileged system?
If you are trying to post, the administrator may have disabled your account, or it may be awaiting activation.
Edit: Oops........Cg2 was faster than me.
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4,744 Posts
PT,
Did you end up buying that old tiller?:hide: Or did I scare you off with my post? :ROF
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