John and Kathy Boehm
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Engine Parts for Dubuque Tractors: John Deere 420, 430, 440



Four views of M3995T Head, which has been thoroughly cleaned and beadblasted and the valve have been reground, No breaks, cracks, or repairs from visual inspection, ready for your paint and to go to work! $420


M3060T (M3956T) Manifold, vewry good condition, $95

Used head gasket

M285T Head bolt, $2 each; set of 7, $10

AM3015T Oil line with nuts, $8
AM234T elbow nut nut, $5
AM235T straight connector, $5
Entire set, $15


AM3009T Heat shield, $45, your choice

M1691T connecting rod with M1847 inserts, very good condtion, $50 each, four available

L768T Crankshaft oil slinger, $9 (G)

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M3112T crankshaft pulley, $40, your choice

M3113T (M4150T) Crank jaw, $25 (M)

M26T Main bearing cap, $8 each

19H1890A Main bearing bolt, $2 each

M4224T (AM3012T) crankshaft with M3112T pulley, very good condition, includes crankshaft gear and good used main bearings, $150

AM3492T Tachometer. as-is, may need work, $20

AM3130T Tacometer drive,$45

M49T Cam gear, $35
M3156T Camshaft, $60
Complete assembly, $80

M49T camshaft gear and M3156T camshaft, $50 (G)

M3414T Valve tappet, $10 each or $32 set of four

AM2849T pushrod, $19 each

Complete rocker arm assembly #1, excellent condition, $110

Complete rocker arm assembly #2, good condition, $80

Valve cover studs (one has the special cut on the threaded area, very nice condition, $12/pair


AM3123T Flywheel with ring gear, $60




M3037T (AT10394T) Block good smooth bores, bored .040 over, includes the .040 over pistons that match this block, visual inspection reveals no breaks or repairs, $395, 125 lbs. Can ship




T10474T Block with very nice smooth standard bores, however the outer water jacket has freeze cracks as shown at the yellow arrows and the top has a few cracks in the water jacket. It may be possible to repair it, but is sold as-is with no guarantees for $60 (125 lb.)

AT10301 Filler cap with oil dipsitck, $20

AM232T Bayonet Oil Dipstick, $10

AM284T oil pressure gauge, nice and original, $40

AM284T oil pressure gauge, nice and original, $30

M98T oil return pipe, $12

Oil pump screen, great condition, $20

L4121T set screw with M463T cap, $13


OIl pump with M38T pump body, pumps well, $60, your choice

Oil filter, M59T base with AM236T case and missing bottom sealing plate, $20


AM2850T (AT10423T) valve cover with good gasket, no dents, no rust, has coil mounting bracket, $35

AM2850T (AT10423T) valve cover, no dents, no rust, $25


Flywheel guard, $20

AM902T Front engine cover, $16

L4115T Cover for front end of crankshaft, $10

M18T Cover for rear main seal, $10

Timing mark cover, $5

M3298T plug, $8

M3295T Gvoernor to carburetor rod, $16 (MJB or G)

T13883T (M3123T) Governor connecting rod, $10

AM1791T Governor shaft with weight carrier, gear, and weights, good condition, $75

AM1792T with M1709T housing and associated parts as shown in the photo, needs cleaning but in very good condition, $45


L4197T spring, $11

T11113T throttle lever, $18

M1858T Spring, $7

M1859T Thrust washer, $7

M1857T Lipped Washer, $10


Throttle parts from a 440I, may fit 430 and slant dash 420, good universal joing, bracket has a welded repair, $75

Spring, $5

AM1788T oil pan, $25


AM669T Dented breather caps, usable, similar to above, $8 each

AM2840T fan blade, $20

AM2840T fan blade, $10

M3057T 5/16 x 1 1/2 Specil bolts to attach water pump, $5 each, three available


Two views of a 420/430/440 water pump with fan hub that is sold as-is as a core or for you to rebuild, turns freely and it probably will be usable without a rebuild, $50


Two views of a 420/430/440 water pump with fan hub that is sold as-is as a core or for you to rebuild, turns freely and it may be usable without a rebuild, $45


Two views of a 420/430/440 water pump that is sold as-is as a core or for you to rebuild, $25

AM3092T Temperature gauge. not tested, $25

M3039T Water pipe (attaches to water pump), $30

AM3817T M3106T Upper water pipe, $25

M4065T upper water pipe $25

Thermostat, $10

T421T Thermostat cover, $10

AM2780T Drain cock, two available, $9

Good used belts, crankshaft pulley to fan pulley and fan pulley to generator, $10/pair

M3066T, valve cover gasket, $13

Various gaskets, $4 each