Kubota D1803 Engine Parts

Alpine Equipment stocks OEM and aftermarket parts for the Kubota D1803 engine — filters, gaskets, seals, pumps, water pumps, injectors, and complete rebuild components. Same-day shop pickup in Utah County; nationwide shipping.

Need pricing on a complete D1803 engine or a full rebuild? Call our factory-certified Kubota team at (801) 701-7394.

☎ Call for Pricing — (801) 701-7394 Request a Quote
Kubota D1803 diesel engine — genuine parts from Alpine Equipment Repair
  • Cylinders3
  • Displacement111.4 cu.in.
  • Bore & Stroke3.43 x 4.031 in
  • Rated Output37.4–56.3 HP
  • Max Torque85.3–134.8 lb-ft
  • AspirationNaturally aspirated / Turbocharged / Turbocharged + Turbo After Cooler
  • Dry Weight333–469 lbs

Specs vary by engine variant/spec code. Confirm fitment by part number or call us.

Kubota D1803 Manuals & Parts Diagrams

Official Kubota parts lists and service-data reference for this model. Use them to find the exact part number or spec, then search or call to order. Or browse the full Kubota manual library.

Illustrated Parts Lists

Service Data

D1803 Engine Parts (878 parts)

Genuine Kubota regulator, assy, part number 1G324-64600 — Alpine Equipment 1G324-64600 REGULATOR, ASSY $425.89 Genuine Kubota bearing, ball, part number 1G355-64780 — Alpine Equipment 1G355-64780 BEARING, BALL $29.19 Genuine Kubota regulator, assy, part number 1G355-64600 — Alpine Equipment 1G355-64600 REGULATOR, ASSY $195.63 Genuine Kubota brush, part number 1G355-64310 — Alpine Equipment 1G355-64310 BRUSH $56.79 Genuine Kubota cover(end), part number 1E994-64230 — Alpine Equipment 1E994-64230 COVER(END) $36.97 Genuine Kubota filter assy, part number 1E786-43350 — Alpine Equipment 1E786-43350 FILTER ASSY $454.35 Genuine Kubota clamp, cord, part number 1E998-67570 — Alpine Equipment 1E998-67570 CLAMP, CORD $16.82 Genuine Kubota housing fw, part number 1E874-04610 — Alpine Equipment 1E874-04610 HOUSING FW $1,092.13 Genuine Kubota nut, part number 1E994-92030 — Alpine Equipment 1E994-92030 NUT $2.21 Genuine Kubota housing, comp(flywheel), part number 1E874-04600 — Alpine Equipment 1E874-04600 HOUSING, COMP(FLYWHEEL) $1,109.92 Genuine Kubota hose, comp(fuel), part number 1E518-42092 — Alpine Equipment 1E518-42092 HOSE, COMP(FUEL) $113.39 Genuine Kubota bracket connector, part number 1E497-65200 — Alpine Equipment 1E497-65200 BRACKET CONNECTOR $95.85 Genuine Kubota bracket WH5, part number 1E455-65150 — Alpine Equipment 1E455-65150 BRACKET WH5 $23.19 Genuine Kubota pipe comp, part number 1E426-73310 — Alpine Equipment 1E426-73310 PIPE COMP $98.07 Genuine Kubota bracket connector, part number 1E426-65203 — Alpine Equipment 1E426-65203 BRACKET CONNECTOR $67.00 Genuine Kubota harness, wire, assy(dp, part number 1E426-65085 — Alpine Equipment 1E426-65085 HARNESS, WIRE, ASSY(DP $248.82 Genuine Kubota guide assy, part number 1E426-36503 — Alpine Equipment 1E426-36503 GUIDE ASSY $60.47 Genuine Kubota harness, wire, assy(en, part number 1E426-65065 — Alpine Equipment 1E426-65065 HARNESS, WIRE, ASSY(EN $859.63 Genuine Kubota bracket comp, part number 1E426-05813 — Alpine Equipment 1E426-05813 BRACKET COMP $55.93 Genuine Kubota tube(oil return), part number 1E426-05832 — Alpine Equipment 1E426-05832 TUBE(OIL RETURN) $18.10 Genuine Kubota housing assy flywheel, part number 1E426-04600 — Alpine Equipment 1E426-04600 HOUSING ASSY FLYWHEEL $983.38 Genuine Kubota bracket(separator), part number 1E426-05822 — Alpine Equipment 1E426-05822 BRACKET(SEPARATOR) $25.63 Genuine Kubota case gear, part number 1E426-04022 — Alpine Equipment 1E426-04022 CASE GEAR $831.17 Genuine Kubota housing assy (flywheel), part number 1E426-04603 — Alpine Equipment 1E426-04603 HOUSING ASSY (FLYWHEEL) $942.09 Genuine Kubota crankcase, comp, part number 1E426-01017 — Alpine Equipment 1E426-01017 CRANKCASE, COMP $4,388.20 Genuine Kubota hook(engine, front), part number 1E426-01740 — Alpine Equipment 1E426-01740 HOOK(ENGINE, FRONT) $36.44 Genuine Kubota pulley, fan drive, part number 1E341-74282 — Alpine Equipment 1E341-74282 PULLEY, FAN DRIVE $170.00 Genuine Kubota stay, part number 1E090-64420 — Alpine Equipment 1E090-64420 STAY $29.84 Genuine Kubota terminal, part number 1C010-65910 — Alpine Equipment 1C010-65910 TERMINAL $2.17 Genuine Kubota connector, part number 1C010-65880 — Alpine Equipment 1C010-65880 CONNECTOR $16.98 Genuine Kubota metal, side 2, 04, part number 1A091-23980 — Alpine Equipment 1A091-23980 METAL, SIDE 2, 04 $33.90 Genuine Kubota gear, cam, part number 1A091-16513 — Alpine Equipment 1A091-16513 GEAR, CAM $86.67 Genuine Kubota crankcase, comp, part number 1A387-01016 — Alpine Equipment 1A387-01016 CRANKCASE, COMP $3,944.86 Genuine Kubota metal, side 1, 04, part number 1A091-23960 — Alpine Equipment 1A091-23960 METAL, SIDE 1, 04 $29.31 Genuine Kubota assy case, brg MAIN2, part number 1A091-07055 — Alpine Equipment 1A091-07055 ASSY CASE, BRG MAIN2 $175.65 Genuine Kubota stopper, fuel camsha., part number 1A091-16320 — Alpine Equipment 1A091-16320 STOPPER, FUEL CAMSHA. $4.87 Genuine Kubota assy piston ring, part number 1A091-21093 — Alpine Equipment 1A091-21093 ASSY PISTON RING $94.82 Genuine Kubota metal, 1.C/SHAFT.04, part number 1A091-23920 — Alpine Equipment 1A091-23920 METAL, 1.C/SHAFT.04 $40.98 Genuine Kubota assy case, brg MAIN1, part number 1A091-07045 — Alpine Equipment 1A091-07045 ASSY CASE, BRG MAIN1 $175.65 Genuine Kubota bolt, bearing case, part number 1A091-04540 — Alpine Equipment 1A091-04540 BOLT, BEARING CASE $13.61 Genuine Kubota cover, injection pump, part number 1A053-51650 — Alpine Equipment 1A053-51650 COVER, INJECTION PUMP $8.69 Genuine Kubota assy camshaft, part number 1A041-16010 — Alpine Equipment 1A041-16010 ASSY CAMSHAFT $568.03 Genuine Kubota assy camshaft, fuel, part number 1A041-16024 — Alpine Equipment 1A041-16024 ASSY CAMSHAFT, FUEL $761.05 Genuine Kubota full assy case, brg, part number 1A041-07095 — Alpine Equipment 1A041-07095 FULL ASSY CASE, BRG $175.65 Genuine Kubota hose, oil cooler, part number 1A024-37152 — Alpine Equipment 1A024-37152 HOSE, OIL COOLER $13.04 Genuine Kubota stay, dynamo, part number 1A033-64420 — Alpine Equipment 1A033-64420 STAY, DYNAMO $18.05 Genuine Kubota bolt, sems, part number 1A021-91030 — Alpine Equipment 1A021-91030 BOLT, SEMS $2.18 Genuine Kubota impeller, water pump, part number 1A021-73510 — Alpine Equipment 1A021-73510 IMPELLER, WATER PUMP $25.77

More Kubota Engine Parts

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Need pricing on a Kubota D1803 engine or a rebuild?

We sell, exchange, and rebuild Kubota engines — and stock the parts to keep yours running. Call or send a quote request.

(801) 701-7394

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