John Deere 40 Series Block
Numbers
Responses
I have received the following information from kind people who have
a JD 40 of some style and who also know their serial number. If you send me your JD 40 style, serial
number, and block number, I will add the information here and will use
it to adjust my block number
chart accordingly. If you don't know where to find your block
number, look here. THANKS!
Style 
Serial Number 
Block Number 
Build Date 
T  60527  66213 

C  60094  66355 

T  61414  67786  < Interesting! 
T  61295  67961  Factory remote hydraulics, long rear axle 
T  61321  67996 

T  61727  68384 

T  63920  68951  < Interesting! 
S  60074  69693  Jan. 12, 1953 
T  63065  70405 

T  63175  70590 

T  63572  71241 

S  60550  71613  Feb 19, 1953 
S  60612  71842 

T  63920  71918 

T  64109  72335 

T  64674  73380 

C  61486  73480 

T  64806  73738 

S  61412  73988 

T  65315  74601 

U or S  65191  74746  Probably had an engine swap 
S  62521  76359 

T  66379  77493 

S  63332  77970 

T  66536  78143 

T  67071  78977 

T  67130  79116 

S  63818  79257 

S  63926  79485 

S  64115  80035 

S  64431  80681 

S  64567  80888 

S  64868  81581 

S  68408  81752  < Interesting! 
S  65038  81937 

S  65528  82335 

S  68719  82380  < Interesting! 
S  65762  83445 

T  69267  83371 

S  65881  83661 

T  69881  84445 

T  70118  84842 

T  70377  85295 

T  71263  86918  Sept. 21, 1953 
S  67164  88486 

S  67305  88895 

T  72488  89947 

U  60219  89953 

S  67575  90576 

S  67613  90838 

U  60476  90865 

T  72992  91177 

U  60585  91289 

T  73051  91574 

T  73245  92116 

U  60742  92173 

U  60810  92567 

T  73376  92574 

U  60861  92746 

T  73499  92905 

S  68149  93575 

T  73960  94255 

T  74163  94926 

S  68374  95113 

U  61541  95122 

U  61759  95760 

U  61798  95827 

U  61917  96190 

U  61920  96215 

U  62023  96495 

C  65207  96504 

U  62213  96837 

U  62117  96917 

U  62273  97266  May 20, 1954 
U  62379  97525 

U  62406  97735 

S  68517  98110  Apr. 19, 1954 
U  62554  98116 

U  62721  98285 

U  62753  99031  Aug. 1954, "Made In U.S.A. decal" 
U  62807  99148 

U  62761  99161 

C  66640  100193 

S  69292  100753 

C  67288  102239 

C  67504  102946 

S  70147  104171  Located in South Africa 
U  63700  104334 

C  68260  105069 

S  70252  105147  Feb. 25, 1955; 
S  70393  106327 

U  63993  106500 

U  63986  106556 

T  76521  106714 

U  64098  107121 

W  60595  107161 

U  64117  107323 

W  60711  107756 

S  70644  107995 

W  60955  109267 

V  60151  109835 

C  69934  110265 

U  64727  111119 

C  70851  112474 

U  65018  112989 

S  71547  113704 

T  77805  114468 

I also received the following submission from MW:
The tractor is a JD 40 Crawler. It's serial number 69190, and the block number is 93616. Both numbers are somewhat suspect.
1) The serial number plate is missing, and the number has been stamped into the bellhousing nearby.
2) The flange which has the block number stamped on it has a chunk missing from the bottom. Only about 1/3 of the first digit remains, and you can see a tiny piece of the middle stroke of the 9. It could *possibly* be a zero, with the leading 1 missing.The remaining digits are clear. There is a big space between the 936 and the 16.
I have no knowledge of if the engine is original.
It is possible that the original tag was misread and should have been 64190. It may also be possible that the block number should be 103616. It may also be that the engine has been replaced. But it is another piece of information, and I thank MW for that.