Cat D4 serial numbers

[MARTYN WILLIAMS]

Can anyone tell me what numbers and the year for a D4 7J series machines? I would think early 1940's but not sure of the number sequence.
Many thanks
Martyn

[SJ]

According to the Cat SNID book the 7J started production in 1939 and the 5T D4 in 1943 and then the 6U @ 7U in 1947.

[catsilver]

Between the 7J and 5T there were also the 2T series machines,7J 1939-1943, 2T 1943 to 1945, 5T 1945-1947. then they broke with traditionn and gave narrow and wide gauge separte serial numbers, narrow 6U series and wide gauge 7U series. 1947 to 1960? But I do know that the later D4C, 24A (UK built) started production in 1959!

[SJ]

Catsilver, I think this Cat SNID sales book I got from the dealer is mixed up a lot. It shows as you said the 2T coming out in 1943 and also the 5T coming out in 1943 and the 5T RD4 coming out in 1945 both starting at 1 and up.

[gauntjoh]

Hi Martyn
Wendel's List show the following.....
1939.......7J1 - 7J1754
1940.......7J1755 - 7J4110
1941.......7J4120 - 7J7544
1942.......7J7545 - 7J9939
1943.......7J9940 -
I'm not sure what happened to 7J4111 - 7J 4119 probably a misprint.
I'm the proud owner of 7J2832W (W = Wide Gauge).

[MARTYN WILLIAMS]

Thanks everyone.When I go down to see the machine I will post pictures of it.
Martyn

[ol Grump]

There's a pretty good listing of the various D2 & D4 models over on the ACME board that breaks 'em down to years and serial numbers.