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



Marvel-Schebler TSX756 (AT10181T) carburetor from a 440, This carburetor has been disassembled, all passages and nozzles cleaned, and reassembled with new gaskets. Ready to use on your tractor, $300


M3995T head, This head has been magnafluxed (certified crack free) and has had the valves and seats ground by my local machine shop. It is ready for paint and installation on your tractor. $400

T10369T manifold for gasoline engine, excellent condition, $95

M1691T connecting rod with good used bearings and bushings, $45 each

M3043T Sttandard pistons, pins included, with used rings, no breaks or repairs, $90/pair (m)


M3043T Pistons, standard for gasoline engine, pins included (note that one piston has a broken portion on the skirt, $50/pair (G)

AM2849T Push rod, $20 each (3 available)

Complete rocker arm assembly, excellent condition, $95

M49T camshaft gear and M3156T camshaft, $75 (m)

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


M3414Tvalve tappets, $5 each or $16/ set (G)

AM3015T Oil line, with nuts, $12

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

L768T Crankshaft oil slinger, $9 (G)

M3114T crankshaft with M16T gear, excellent condition, includes good use main bearings matched , $400

Flywheel with ring gear, $60

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

Choke cable, $9

AM1791T governor assembly, very good condition , $90

AM1792T governor case assembly with M1709T housing, $35

L4197T spring, $11

T10733T Carburetor connecting rod with associated parts, $30

T13883T Governor connecting rod, $15

T10294T Throttle lever, $18

AT10301T Filler cap with oil dipstick, $15

M98T oil return pipe, $12

OIl pump with M38T pump body, pumps well, $70

AM230T Screen for oil pump, $25

L4121T set screw with M463T special hex nut (to hold oil pump in place), $7

Oil filter, M59T base with AM236T case and both top and bottom sealing plates, $30

AM1788T oil pan, $25

AT10416T vaqlve cover with breather pipe, $15

AM2840T fan blade, $20


AT10299T radiator, no leaks when tested, but it has had several past repairs, $80



Water pump, need repair or use for core, $25 each


M3106T Upper water pipe, $25

M3039T water pipe, $20

Thermostat, $10

T421T Thermostate cover, $10

Radiator cap, not JD, $2

Drain plug, $2

Drain plug, $7

M3066T, valve cover gasket, $8

Various gaskets, $4 each