JD 60 v belt

[jd2cyl]

Working on my 1956 JD60 and am trying to find the correct belt length. Parts book lists 2 different numbers, the longest says
it is 46.27 Tryed that and I don't have enough movement on the generator to secure it to the strap. The tractor does have
factory PS. Seems like some time ago this was a thread but I can't find it.

Thanks, Russ

 

[JoeM(GA)]

Appears to be dependent on serial number, not whether it has PS or not, these are Gates numbers

 

[Mike(NEOhio)]

Found the same thing with my A. Looking up crosses and found three different lengths. I finally just measured and went from there.

 

[jd2cyl]

Tried the string trick yesterday and came up with a measurement less than the given length for the correct belt. Going to try that again. Best I can figure is with the serial number break pulley dimensions changed requiring a different belt size. I also have a 1953 60 so I will try checking pulley size differences.
Do you remember what length belt you ended with?

Thanks, Russ

 

[jd2cyl]

I am aware of the serial number break for the different lengths. I have a 60 from the older serial numbers and this one with PS from the later numbers. Best I can figure there is difference in pulley sizes somewhere causing the need for a longer belt than called out on this tractor.

 

[buickanddeere]

Is the pulley groove width different between the three different versions of the 60 s cooling systems ?

 

[ET]

The early 60's used a wider belt. A
carryover from the A.

 

[Mike(NEOhio)]

Don't recall the length I bought. I measured the max and min center distances between the pulleys and added the half circumferences. Picked a length that was about in the middle.

 

[buickanddeere]

(quoted from post at 08:29:50 12/04/23) The early 60's used a wider belt. A
carryover from the A.

I was wondering if they were measuring a wide pulley then wondering why a narrow belt was too long , type of thing .

 

[jd2cyl]

I've been out to the barn this morning checking things out. What I found so far is the pre serial number break pulleys are
all half inch width. Verified this on my oldest tractor. The pulleys on the post serial number break use a 3/8 width pulley, verified on my later tractor.
Pulley diameters are all the same the best I can measure. My assumption from here is that the belt A4287R for s/n prior to
6013899 is 1/2 inch width and the belt A4897R is 3/8 width. When you look either belt up everyone shows both being 1/2 inch
width. Going to bite the bullet and order one from Deere and see what size shows up.
Thanks, Russ

 

[jd2cyl]

I've been out to the barn this morning checking things out. What I found so far is the pre serial number break pulleys are
all half inch width. Verified this on my oldest tractor. The pulleys on the post serial number break use a 3/8 width pulley, verified on my later tractor.
Pulley diameters are all the same the best I can measure. My assumption from here is that the belt A4287R for s/n prior to
6013899 is 1/2 inch width and the belt A4897R is 3/8 width. when you look either belt up everyone shows both being 1/2 inch
width. Going to bite the bullet and order one from Deere and see what size shows up.
Thanks, Russ