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Tractor Pulling Discussion Forum

JD A or 60 Cam question

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jdk

10-14-2003 11:19:09




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Curious if anyone had the specifications on a late A or 60 cam. Looking for lift, duration and intake and exhaust opening and closing points. All help would be appreciated. Thanks!




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buickanddeere

10-14-2003 19:29:25




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 Re: JD A or 60 Cam question in reply to jdk, 10-14-2003 11:19:09  
Same timing from when the A's were styled to the 630. Set a gasoline tractor fuel efficiency record that likely still stands at Nebraska. More lift and larger nail head intake valves, three angle valve job and blending smooth the valve bowl/combustion chamber one inch each side of the seats. Will make cheap easy power.



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lynn

10-14-2003 17:23:24




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 Re: JD A or 60 Cam question in reply to jdk, 10-14-2003 11:19:09  
jdk..found in my old papers where i degreed a stock a cam in the tractor..all i got was the intake and this was measured at .050 lift..
io..22 degrees atdc
ic..27 degrees abdc
lobe center 116 degees atdc
lynn



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lynn

10-14-2003 17:12:27




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 Re: JD A or 60 Cam question in reply to jdk, 10-14-2003 11:19:09  
jdk..had one degreed several years ago..don't know how to put a scan of it on the board or i would do that io..20.7 degrees atdc
ic..22.7 degrees abdc
eo..35.5 degrees bbdc
ec..12.1 degrees btdc
lobe center 113.1 cam degrees
intake duration..182 degrees
exhaust druation..203 degrees
intake cam lift.. .279 inches
exhaust cam lift.. .296 inches
this was i cam i pulled out of a tractor so it was well used..lynn

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Mike Aylward

10-14-2003 13:34:42




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 Re: JD A or 60 Cam question in reply to jdk, 10-14-2003 11:19:09  
JDK, the specifications are as follows:

IO- 10* ATDC
IC- 40* ABDC
EO- 45* BBDC
EC- 5* ATDC

Hope this helps. Mike



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BUDD

10-14-2003 15:59:33




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 Re: Re: JD A or 60 Cam question in reply to Mike Aylward, 10-14-2003 13:34:42  
MIke;

Is this info right IC- 40* ABDC
This seems a little late to be closing. I am not an expert by any means. This is how I read this, the piston is on its way back up at this point right. Please correct me if I am wrong.

BUDD ('';'')



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Mike Aylward

10-15-2003 06:20:01




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 Re: Re: Re: JD A or 60 Cam question in reply to BUDD, 10-14-2003 15:59:33  
Budd, these specifications were taken from Deere service specifications. They are taken at "0" lift and will vary from Lynn's figures above taken at .050" of lift which is more common today. Mike



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Rick

10-14-2003 16:17:06




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 Re: Re: Re: JD A or 60 Cam question in reply to BUDD, 10-14-2003 15:59:33  
your correct on being to late i sell a corrective cam which correct this but is not good for a tractor without a water pump in the field it will over heat but a puller running on a track for only a few minutes under load wont hurt



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XXX pulling

10-15-2003 08:57:31




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 Re: Re: Re: Re: JD A or 60 Cam question in reply to Rick, 10-14-2003 16:17:06  
What's the specifics and application for your cam, Rick



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