Late 3020 engine

[Pete1989]

Are there any differences between early and late 3020 engines?
Thanks
 

[tim s]

The early ones had a ventilator pump, the newer ones didn"t.
 

[Tx Jim]

JD made six different cylinder blocks with different casting numbers.
AR48625 CYLINDER BLOCK 1 (DIESEL) (3020E) (NLA) (MARKED R32020, R40850, R46350 OR R46430) (SUB FOR AR40637, AR50353 OR AR44557) (WITH BALANCER HOUSING)
AR48629 CYLINDER BLOCK 1 (DIESEL) (A) (3010, 3020E) (NLA) (SUB RG23361) (MARKED R26160, R32020, R40850 OR R46430) (SUB FOR AR32923 AND AR40637) (USE ONLY WHEN AR48625 HAS BEEN PREVIOUSLY INSTALLED) (USE W/ AR48522)
AR54702 CYLINDER BLOCK 1 (DIESEL) (3020E) (NLA) (MARKED R40700, R48430 OR R50610) (SUB FOR AR42642 OR AR52239)
AR50638 CYLINDER BLOCK 1 280001 - (DIESEL) (3020L) (MARKED R47520) (NLA) (ALSO ORDER (8) R79188)
AR52239 CYLINDER BLOCK 1 - 280000 (DIESEL) (3020L) (NLA) (MARKED R40700 OR R48430) (SUB FOR AR42642) (ALSO ORDER (8) R79188)
AR94839 CYLINDER BLOCK 1 (DIESEL) (3020L) (MARKED R72127) (NLA)

(3020E) TSN ( -122999)

(3020L) TSN (123000- )
 

[Pete1989]

Thanks jim. Guess we will have to wait till the tractor arrives to see what block it is, all we know is its got engine problems. We have a 3020 engine spare, not sure what year it is off though.
 

[long green line man]

Also: late (72)s/n 280001^, 3020 block Marked-R47520, used a frost plug, so block heater could be used, still most economical way to heat at -0 & down; & late engines used 12 volt sys. w/ alt.
 

[Kent Petersen]

block and head differant serial 123000 takes diff head gasket do not interchange with old tractors
 

[4010 puller]

Some run different injection pumps, i think the little one can be converted the the "Normal" roosa master rotary pump without changing blocks.
 

[tim s]

The little injection pumps were randomly installed as they were put together, you could not specify which one you were getting,,it was just the luck of the draw..and yes they can be switched out to the larger pump easy enough..