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 assy pump,water, part number 1A051-73036 — Alpine Equipment 1A051-73036 ASSY PUMP,WATER $169.03 Genuine Kubota switch,oil, part number 1A024-39010 — Alpine Equipment 1A024-39010 SWITCH,OIL $27.43 Genuine Kubota SPRING(GOVERNOR,1), part number 1A023-56417 — Alpine Equipment 1A023-56417 SPRING(GOVERNOR,1) $5.53 Genuine Kubota gasket,water pump na, part number 1A021-73430 — Alpine Equipment 1A021-73430 GASKET,WATER PUMP NA $6.26 Genuine Kubota pipe,water return, part number 1A021-73340 — Alpine Equipment 1A021-73340 PIPE,WATER RETURN $10.79 Genuine Kubota gasket,return flange, part number 1A021-73332 — Alpine Equipment 1A021-73332 GASKET,RETURN FLANGE $1.59 Genuine Kubota assy pump,water, part number 1A021-73036 — Alpine Equipment 1A021-73036 ASSY PUMP,WATER $167.78 Genuine Kubota assy thermostat, part number 1A021-73013 — Alpine Equipment 1A021-73013 ASSY THERMOSTAT $33.75 Genuine Kubota gasket,w/flange na, part number 1A021-72920 — Alpine Equipment 1A021-72920 GASKET,W/FLANGE NA $2.40 Genuine Kubota assy solenoid, part number 1A021-60017 — Alpine Equipment 1A021-60017 ASSY SOLENOID $173.75 Genuine Kubota gasket(plate), part number 1A021-57212 — Alpine Equipment 1A021-57212 GASKET(PLATE) $2.40 Genuine Kubota comp.guide,solenoid, part number 1A021-56602 — Alpine Equipment 1A021-56602 COMP.GUIDE,SOLENOID $9.43 Genuine Kubota SPRING(GOVERNOR,2), part number 1A021-56422 — Alpine Equipment 1A021-56422 SPRING(GOVERNOR,2) $2.92 Genuine Kubota apparatus,idling, part number 1A021-54160 — Alpine Equipment 1A021-54160 APPARATUS,IDLING $74.79 Genuine Kubota gasket, pump cover, part number 1A021-51663 — Alpine Equipment 1A021-51663 GASKET, PUMP COVER $2.92 Genuine Kubota gasket,oil pump na, part number 1A021-35150 — Alpine Equipment 1A021-35150 GASKET,OIL PUMP NA $1.20 Genuine Kubota flange,oil filler, part number 1A021-33112 — Alpine Equipment 1A021-33112 FLANGE,OIL FILLER $12.60 Genuine Kubota bush,idle gear, part number 1A021-24982 — Alpine Equipment 1A021-24982 BUSH,IDLE GEAR $19.08 Genuine Kubota pin,straight, part number 1A021-23192 — Alpine Equipment 1A021-23192 PIN,STRAIGHT $1.74 Genuine Kubota piston pin, part number 1A021-21310 — Alpine Equipment 1A021-21310 PISTON PIN $6.47 Genuine Kubota gasket,head cover, part number 1A021-14523 — Alpine Equipment 1A021-14523 GASKET,HEAD COVER $14.44 Genuine Kubota gasket,ex-manifold, part number 1A021-12350 — Alpine Equipment 1A021-12350 GASKET,EX-MANIFOLD $12.07 Genuine Kubota gasket,in-manifold, part number 1A021-11822 — Alpine Equipment 1A021-11822 GASKET,IN-MANIFOLD $7.89 Genuine Kubota gasket,gear case na, part number 1A021-04130 — Alpine Equipment 1A021-04130 GASKET,GEAR CASE NA $25.80 Genuine Kubota assy coupler, part number 19872-65880 — Alpine Equipment 19872-65880 ASSY COUPLER $2.65 Genuine Kubota assy coupler, part number 19838-65830 — Alpine Equipment 19838-65830 ASSY COUPLER $11.84 Genuine Kubota assy thermoswitch, part number 19498-83044 — Alpine Equipment 19498-83044 ASSY THERMOSWITCH $60.47 Genuine Kubota assy cleaner,air, part number 19494-11010 — Alpine Equipment 19494-11010 ASSY CLEANER,AIR $482.54 Genuine Kubota assy alternator, part number 19279-64015 — Alpine Equipment 19279-64015 ASSY ALTERNATOR $575.96 Genuine Kubota assy terminal, part number 19268-65780 — Alpine Equipment 19268-65780 ASSY TERMINAL $4.34 Genuine Kubota terminal, part number 19237-65910 — Alpine Equipment 19237-65910 TERMINAL $1.17 Genuine Kubota sleeve,crankshaft, part number 19202-23280 — Alpine Equipment 19202-23280 SLEEVE,CRANKSHAFT $28.75 Genuine Kubota collar,crankshaft, part number 19202-23250 — Alpine Equipment 19202-23250 COLLAR,CRANKSHAFT $28.50 Genuine Kubota pipe,injection 3, part number 19077-53733 — Alpine Equipment 19077-53733 PIPE,INJECTION 3 $40.10 Genuine Kubota pipe,injection 2, part number 19077-53723 — Alpine Equipment 19077-53723 PIPE,INJECTION 2 $43.46 Genuine Kubota pipe,injection 1, part number 19077-53714 — Alpine Equipment 19077-53714 PIPE,INJECTION 1 $43.46 Genuine Kubota seal,heat, part number 19077-53650 — Alpine Equipment 19077-53650 SEAL,HEAT $5.44 Genuine Kubota kit tank,reserve, part number 19059-72090 — Alpine Equipment 19059-72090 KIT TANK,RESERVE $74.38 Genuine Kubota o ring, part number 19013-96850 — Alpine Equipment 19013-96850 O RING $2.74 Genuine Kubota bolt,cylinder head, part number 19013-03450 — Alpine Equipment 19013-03450 BOLT,CYLINDER HEAD $9.58 Genuine Kubota cap,radiator, part number 17580-16060 — Alpine Equipment 17580-16060 CAP,RADIATOR $37.31 Genuine Kubota assy starter, part number 17490-63014 — Alpine Equipment 17490-63014 ASSY STARTER $664.85 Genuine Kubota BELT(A-42.0), part number 17480-97010 — Alpine Equipment 17480-97010 BELT(A-42.0) $27.78 Genuine Kubota guide,oil gauge, part number 17456-36420 — Alpine Equipment 17456-36420 GUIDE,OIL GAUGE $21.50 Genuine Kubota assy switch,starter, part number 17422-63590 — Alpine Equipment 17422-63590 ASSY SWITCH,STARTER $77.87 Genuine Kubota plug, part number 17391-96160 — Alpine Equipment 17391-96160 PLUG $0.64 Genuine Kubota fan, part number 17373-74110 — Alpine Equipment 17373-74110 FAN $113.61 Genuine Kubota pipe 1,RETURN, part number 17331-73342 — Alpine Equipment 17331-73342 PIPE 1,RETURN $5.78

More Kubota Engine Parts

→ Kubota Industrial Engine Parts & Service hub

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

Call or Text — Factory-Certified Kubota Elite Dealer

★ 4.9 Google Rating ⏱ Mon–Fri 7a–5p 🚚 Nationwide Shipping

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