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.

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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 plug, part number 1A021-96020 — Alpine Equipment 1A021-96020 PLUG $5.12 Genuine Kubota bolt, part number 1A021-91020 — Alpine Equipment 1A021-91020 BOLT $2.55 Genuine Kubota bolt, adjusting, part number 1A021-57390 — Alpine Equipment 1A021-57390 BOLT, ADJUSTING $8.62 Genuine Kubota flange, part number 1A021-73520 — Alpine Equipment 1A021-73520 FLANGE $52.32 Genuine Kubota spring, return, part number 1A021-57920 — Alpine Equipment 1A021-57920 SPRING, RETURN $7.78 Genuine Kubota gear, ring, part number 1A021-63820 — Alpine Equipment 1A021-63820 GEAR, RING $136.46 Genuine Kubota bolt, part number 1A021-54120 — Alpine Equipment 1A021-54120 BOLT $5.12 Genuine Kubota lever, fork, part number 1A021-56133 — Alpine Equipment 1A021-56133 LEVER, FORK $49.55 Genuine Kubota comp.lever, part number 1A021-56020 — Alpine Equipment 1A021-56020 COMP.LEVER $31.13 Genuine Kubota lever, engine stop, part number 1A021-57720 — Alpine Equipment 1A021-57720 LEVER, ENGINE STOP $22.26 Genuine Kubota gear, crankshaft, part number 1A021-24110 — Alpine Equipment 1A021-24110 GEAR, CRANKSHAFT $74.79 Genuine Kubota comp lever, stop, part number 1A021-57710 — Alpine Equipment 1A021-57710 COMP LEVER, STOP $24.83 Genuine Kubota assy, bolt, part number 1A021-54350 — Alpine Equipment 1A021-54350 ASSY, BOLT $5.28 Genuine Kubota shaft, idle gear, part number 1A021-24254 — Alpine Equipment 1A021-24254 SHAFT, IDLE GEAR $99.62 Genuine Kubota shaft, rocker arm, part number 1A021-14260 — Alpine Equipment 1A021-14260 SHAFT, ROCKER ARM $89.04 Genuine Kubota shaft, idle gear, part number 1A021-24252 — Alpine Equipment 1A021-24252 SHAFT, IDLE GEAR $98.52 Genuine Kubota joint, part number 1A021-32290 — Alpine Equipment 1A021-32290 JOINT $31.41 Genuine Kubota collar, part number 1A021-24370 — Alpine Equipment 1A021-24370 COLLAR $9.72 Genuine Kubota pin, straight, part number 1A021-23190 — Alpine Equipment 1A021-23190 PIN, STRAIGHT $11.71 Genuine Kubota clamp, hose, part number 1A021-11720 — Alpine Equipment 1A021-11720 CLAMP, HOSE $2.89 Genuine Kubota terminal(m), part number 19844-65770 — Alpine Equipment 19844-65770 TERMINAL(M) $2.65 Genuine Kubota connector, part number 19872-65840 — Alpine Equipment 19872-65840 CONNECTOR $1.95 Genuine Kubota frame, drive end, part number 19460-63030 — Alpine Equipment 19460-63030 FRAME, DRIVE END $125.66 Genuine Kubota oil pan, part number 19299-01616 — Alpine Equipment 19299-01616 OIL PAN $186.62 Genuine Kubota terminal, part number 19268-65930 — Alpine Equipment 19268-65930 TERMINAL $2.12 Genuine Kubota ball, part number 19212-97130 — Alpine Equipment 19212-97130 BALL $0.45 Genuine Kubota sleeve, part number 19268-65870 — Alpine Equipment 19268-65870 SLEEVE $2.12 Genuine Kubota roller, part number 19212-63100 — Alpine Equipment 19212-63100 ROLLER $1.04 Genuine Kubota plug, part number 19071-96020 — Alpine Equipment 19071-96020 PLUG $4.82 Genuine Kubota assy switch, part number 17490-63023 — Alpine Equipment 17490-63023 ASSY SWITCH $366.33 Genuine Kubota frame, end, part number 17369-64060 — Alpine Equipment 17369-64060 FRAME, END $141.85 Genuine Kubota clamp, cord, part number 17369-67570 — Alpine Equipment 17369-67570 CLAMP, CORD $14.22 Genuine Kubota cover, end, part number 17369-64230 — Alpine Equipment 17369-64230 COVER, END $67.67 Genuine Kubota gear, pinion, part number 17311-63280 — Alpine Equipment 17311-63280 GEAR, PINION $55.49 Genuine Kubota metal, crankpin 04, part number 17311-22980 — Alpine Equipment 17311-22980 METAL, CRANKPIN 04 $26.84 Genuine Kubota bolt, part number 17123-63320 — Alpine Equipment 17123-63320 BOLT $15.67 Genuine Kubota screw, part number 17123-93310 — Alpine Equipment 17123-93310 SCREW $3.30 Genuine Kubota bearing, ball, part number 17123-63500 — Alpine Equipment 17123-63500 BEARING, BALL $28.79 Genuine Kubota spring, part number 17123-63140 — Alpine Equipment 17123-63140 SPRING $8.36 Genuine Kubota frame, end, part number 17123-63200 — Alpine Equipment 17123-63200 FRAME, END $131.70 Genuine Kubota joint, breather, part number 17182-05550 — Alpine Equipment 17182-05550 JOINT, BREATHER $9.95 Genuine Kubota screw, part number 17123-93320 — Alpine Equipment 17123-93320 SCREW $3.30 Genuine Kubota gear 1, part number 17123-63260 — Alpine Equipment 17123-63260 GEAR 1 $28.86 Genuine Kubota holder, brush, part number 17123-63380 — Alpine Equipment 17123-63380 HOLDER, BRUSH $88.32 Genuine Kubota clutch, over running, part number 17123-63040 — Alpine Equipment 17123-63040 CLUTCH, OVER RUNNING $462.06 Genuine Kubota seat, exhaust valve, part number 17111-13612 — Alpine Equipment 17111-13612 SEAT, EXHAUST VALVE $11.79 Genuine Kubota armature, part number 17123-63070 — Alpine Equipment 17123-63070 ARMATURE $602.92 Genuine Kubota frame, drive end, part number 17123-63030 — Alpine Equipment 17123-63030 FRAME, DRIVE END $118.57

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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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