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 pin, spring, part number 05411-00528 — Alpine Equipment 05411-00528 PIN, SPRING $0.86 Genuine Kubota pin, straight, part number 05012-01018 — Alpine Equipment 05012-01018 PIN, STRAIGHT $1.07 Genuine Kubota pin, straight, part number 05012-00612 — Alpine Equipment 05012-00612 PIN, STRAIGHT $0.60 Genuine Kubota pin, straight, part number 05012-00408 — Alpine Equipment 05012-00408 PIN, STRAIGHT $0.37 Genuine Kubota o ring, part number 04814-00060 — Alpine Equipment 04814-00060 O RING $1.20 Genuine Kubota cir-clip, external, part number 04612-00300 — Alpine Equipment 04612-00300 CIR-CLIP, EXTERNAL $0.90 Genuine Kubota screw, pan head, part number 03054-50535 — Alpine Equipment 03054-50535 SCREW, PAN HEAD $0.24 Genuine Kubota screw, pan head, part number 03054-50510 — Alpine Equipment 03054-50510 SCREW, PAN HEAD $0.27 Genuine Kubota nut, part number 02114-50080 — Alpine Equipment 02114-50080 NUT $0.93 Genuine Kubota bolt, flange, part number 01774-51075 — Alpine Equipment 01774-51075 BOLT, FLANGE $7.23 Genuine Kubota bolt, frange, part number 01774-51020 — Alpine Equipment 01774-51020 BOLT, FRANGE $1.20 Genuine Kubota bolt, flange, part number 01774-51016 — Alpine Equipment 01774-51016 BOLT, FLANGE $1.92 Genuine Kubota bolt, flange, part number 01754-50885 — Alpine Equipment 01754-50885 BOLT, FLANGE $3.70 Genuine Kubota bolt, flange, part number 01754-51075 — Alpine Equipment 01754-51075 BOLT, FLANGE $3.65 Genuine Kubota bolt, flange, part number 01755-50612 — Alpine Equipment 01755-50612 BOLT, FLANGE $1.95 Genuine Kubota bolt, flange, part number 01754-50825 — Alpine Equipment 01754-50825 BOLT, FLANGE $2.46 Genuine Kubota bolt, flange, part number 01754-50830 — Alpine Equipment 01754-50830 BOLT, FLANGE $2.99 Genuine Kubota bolt, flange, part number 01754-50660 — Alpine Equipment 01754-50660 BOLT, FLANGE $2.64 Genuine Kubota bolt, flange, part number 01754-50645 — Alpine Equipment 01754-50645 BOLT, FLANGE $1.20 Genuine Kubota bolt, flange, part number 01754-50665 — Alpine Equipment 01754-50665 BOLT, FLANGE $2.48 Genuine Kubota stud, part number 01517-51028 — Alpine Equipment 01517-51028 STUD $1.07 Genuine Kubota bolt, flange, part number 01754-50618 — Alpine Equipment 01754-50618 BOLT, FLANGE $2.73 Genuine Kubota bolt, flange, part number 01754-50610 — Alpine Equipment 01754-50610 BOLT, FLANGE $1.07 Genuine Kubota bolt, part number 01133-51030 — Alpine Equipment 01133-51030 BOLT $1.12 Genuine Kubota bolt, part number 01153-50812 — Alpine Equipment 01153-50812 BOLT $0.54 Genuine Kubota bolt, part number 01133-51025 — Alpine Equipment 01133-51025 BOLT $1.12 Genuine Kubota bolt, part number 01123-50818 — Alpine Equipment 01123-50818 BOLT $0.69 Genuine Kubota bolt, part number 01123-50840 — Alpine Equipment 01123-50840 BOLT $1.12 Genuine Kubota bolt, part number 01123-50865 — Alpine Equipment 01123-50865 BOLT $1.92 Genuine Kubota bolt, part number 01123-50850 — Alpine Equipment 01123-50850 BOLT $1.50 Genuine Kubota bolt, part number 01123-50800 — Alpine Equipment 01123-50800 BOLT $2.68 Genuine Kubota bolt, part number 01025-50630 — Alpine Equipment 01025-50630 BOLT $0.64 Genuine Kubota bolt, part number 01023-50620 — Alpine Equipment 01023-50620 BOLT $0.68 Genuine Kubota plug, part number 15521-96020 — Alpine Equipment 15521-96020 PLUG $2.30 Genuine Kubota pulley,fan, part number TC403-74250 — Alpine Equipment TC403-74250 PULLEY,FAN $48.50 Genuine Kubota pulley,fan, part number TC402-74250 — Alpine Equipment TC402-74250 PULLEY,FAN $39.70 Genuine Kubota switch,oil, part number T1850-39010 — Alpine Equipment T1850-39010 SWITCH,OIL $37.97 Genuine Kubota sensor,temperature, part number T1063-65660 — Alpine Equipment T1063-65660 SENSOR,TEMPERATURE $20.15 Genuine Kubota holder, pump, part number T0430-33610 — Alpine Equipment T0430-33610 HOLDER, PUMP $54.78 Genuine Kubota gasket,muffler na, part number T0070-16420 — Alpine Equipment T0070-16420 GASKET,MUFFLER NA $3.51 Genuine Kubota cup,assy, part number RD579-51310 — Alpine Equipment RD579-51310 CUP,ASSY $76.57 Genuine Kubota assy element, part number RD451-51940 — Alpine Equipment RD451-51940 ASSY ELEMENT $19.26 Genuine Kubota o ring, part number RD451-51930 — Alpine Equipment RD451-51930 O RING $4.95 Genuine Kubota assy body, part number RD451-51910 — Alpine Equipment RD451-51910 ASSY BODY $154.12 Genuine Kubota assy filter, part number RD451-51360 — Alpine Equipment RD451-51360 ASSY FILTER $375.33 Genuine Kubota element,assy, part number RD159-51940 — Alpine Equipment RD159-51940 ELEMENT,ASSY $77.47 Genuine Kubota o-ring, part number RD159-51930 — Alpine Equipment RD159-51930 O-RING $5.46 Genuine Kubota element,inner, part number R2401-42280 — Alpine Equipment R2401-42280 ELEMENT,INNER $25.08

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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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349 S 100 W, American Fork, UT 84003 · Mon–Fri 7:00 AM – 5:00 PM · Sat by Appt