Tractor reference
Kubota LX4020
Specifications, maintenance, parts and compatibility reference.
Reference set: United States · LX4020HSD 4WD, 3-range HST, ROPS · Current Current US LX20 configuration confirmed by Kubota USA; detailed specification values come from the current LX20 brochure.
Reference versions: United States · LX4020HSD 4WD, 3-range HST, ROPS · Current · United States · LX4020HSDC 4WD, 3-range HST, factory cab · Current
Current is selected by default. Historical, manual-specific and market-unspecified contexts stay separate so their parts and service data are not presented as current-US fitment.
Current is selected by default. Historical, manual-specific and market-unspecified contexts stay separate so their parts and service data are not presented as current-US fitment.
Engine
Engine manufacturerKubota
Engine familyV1505-CR-TE5-D40R4
Engine typeDirect injection, vertical, water-cooled 4-cycle turbocharged diesel
Cylinders4
Displacement91.4 cu in
Displacement1498 cm3
Gross engine power39.8 hp
Rated engine speed2700 rpm
Transmission
Standard transmissionHST, 3 ranges
BrakesMulti-plate wet disc
Driveline4WD
SteeringHydrostatic power steering
PTO
PTO power32.6 hp
PTO actuationIndependent PTO
PTO configuration540 rpm rear PTO
Hydraulics
Hydraulic control systemPosition control valve
Hydraulic systemOpen center, dual pump
Hydraulic pump rated output9.5 gpm
3-point hitchCategory I
3-point lift capacity at lift points2535 lb
3-point hitch lift capacity at 24 in. behind lift point1962 lb
Dimensions & Weight
Overall width53.7 in
Overall length101.6 in
Standard 4WD wheelbase66.7 in
Front axle clearance8.9 in
Tractor weight2191 lb
Turning radius7.5 ft
Capacities
Engine oil capacity5 US qt
Transmission case capacity5.5 US gal
Compatible parts & kits
Parts shown here are limited to the selected reference context plus generic machine-level fitment. Configuration-specific fitment, evidence confidence and the direct fitment source are shown under each part when available.
R1401-42270Outer Air Filter ElementApplies to: Current US LX20 configuration-specific service reference; confirm tractor serial number before ordering.Evidence: High-confidence source-backed fitment · Kubota LX4020HSD parts catalog - service filter references →Engine Air Filters →
R2401-42280Inner Air Filter ElementApplies to: Current US LX20 configuration-specific service reference; confirm tractor serial number before ordering.Evidence: High-confidence source-backed fitment · Kubota LX4020HSD parts catalog - service filter references →Engine Air Filters →
HH160-32093Engine Oil FilterApplies to: Current US LX20 configuration-specific service reference; confirm tractor serial number before ordering.Evidence: High-confidence source-backed fitment · Kubota LX4020HSD parts catalog - service filter references →Engine Oil Filters →
6C830-55120Fuel Filter ElementApplies to: Current US LX20 configuration-specific service reference; confirm tractor serial number before ordering.Evidence: High-confidence source-backed fitment · Kubota LX4020HSD parts catalog - service filter references →Fuel Filters →
6C830-55220Water Separator ElementApplies to: Current US LX20 configuration-specific service reference; confirm tractor serial number before ordering.Evidence: High-confidence source-backed fitment · Kubota LX4020HSD parts catalog - service filter references →Fuel Filters →
HHK32-16774Hydraulic Oil Filter CartridgeApplies to: Current US LX20 configuration-specific service reference; confirm tractor serial number before ordering.Evidence: High-confidence source-backed fitment · Kubota LX4020HSD parts catalog - service filter references →Hydraulic Filters →
HH660-36060Hydrostatic Transmission Oil FilterApplies to: Current US LX20 configuration-specific service reference; confirm tractor serial number before ordering.Evidence: High-confidence source-backed fitment · Kubota LX4020HSD parts catalog - service filter references →Transmission Filters →
Documented attachment fitment
Attachment fitment is stored separately from the specification/parts version selector. Multiple cited records for the same attachment are grouped below rather than shown as duplicate attachments. A listed attachment may still require a specific axle, driveline, transmission or tractor configuration.
BackhoeKubota BH77Fitment note: Kubota describes BH77 as performance matched to the LX20 Series. Confirm the LX4020-specific subframe and cab/ROPS configuration before ordering.Backhoe details: 180° swing arc; approximate net weight 824.5 lb excluding buckets and subframes. Kubota describes BH77 as performance matched to the LX20 Series; tractor-specific subframe requirements must be confirmed.Fitment source: Kubota USA LX20 Series brochure - LA535, LA545 and BH77 specifications →
86.8 in digging depth at 2-ft flat bottom; 123.7 in reach from swing pivotWorking height: 123 in operating height fully raised
Front loaderKubota LA545Fitment note: Kubota pairs LA545 with LX4020. Confirm ROPS/cab Swift-Tach and hydraulic-coupler configuration before installation.Front loader details: Wide-boom loader with standard 2-lever quick coupler; optional mechanical self-leveling and Swift-Tach. Front loader is not compatible with LX3520DTN narrow tractor.Fitment source: Kubota USA LX20 Series brochure - LA535, LA545 and BH77 specifications →
1,100 lb at pivot pin/max height; 1,325 lb at pivot pin @ 1.5 mLift height: 87.6 in maximum lift height at pivot pin
Mid Mount MowerKubota RC72-40LXFitment note: Current Kubota material identifies 60 and 72 in mid-mount mower options for LX3520/LX4020. RCK60-40LX and RC72-40LX are the LX20 deck models. Confirm current mid-PTO and tire configuration before ordering.Mid Mount Mower details: Right side discharge; 3 blades; 1.5-4 in cutting height; parallel linkage moved by 3-point linkage; wash port; compatible with large-diameter, R4 and R14 tires.Fitment source: Kubota USA LX20 brochure - RCK60-40LX and RC72-40LX mid-mount mower specifications →
72 in cutting widthWorking height: 1.5-4 in cutting-height range
Mid Mount MowerKubota RCK60-40LXFitment note: Current Kubota material identifies 60 and 72 in mid-mount mower options for LX3520/LX4020. RCK60-40LX and RC72-40LX are the LX20 deck models. Confirm current mid-PTO and tire configuration before ordering.Mid Mount Mower details: Right side discharge; 3 blades; 1.5-4 in cutting height; parallel linkage moved by 3-point linkage; wash port; compatible with large-diameter, R4 and R14 tires.Fitment source: Kubota USA LX20 brochure - RCK60-40LX and RC72-40LX mid-mount mower specifications →
60 in cutting widthWorking height: 1.5-4 in cutting-height range
Snow Blower · Conditional fitmentKubota LX2963Requirement: Requires LX6971 front hitch and the correct LX20 mid-PTO driveline kit for LX4020.Snow Blower details: Gearbox reduction; hydraulic chute rotation; manual chute deflection. Requires LX2940B front hitch on LX2620 or LX6971 front hitch on LX3520/LX4020 plus the correct mid-PTO driveline kit. Not compatible with LX2620 SU, LX3520DTN narrow, or LX3520 SU configurations.Fitment source: Kubota USA LX20 snow implements brochure - snow blower compatibility and requirements →
63 in residential 2-stage snow blowerWorking height: Front PTO-driven snow implement
Snow Blower · Conditional fitmentKubota LX2970Requirement: Requires LX6971 front hitch and the correct LX20 mid-PTO driveline kit for LX4020.Snow Blower details: Oil-bath reduction gearboxes; hydraulic chute rotation; manual deflection; abrasion-resistant housing and impeller. Requires LX2940B front hitch on LX2620 or LX6971 front hitch on LX3520/LX4020 plus the correct mid-PTO driveline kit. Not compatible with LX2620 SU, LX3520DTN narrow, or LX3520 SU configurations.Fitment source: Kubota USA LX20 snow implements brochure - snow blower compatibility and requirements →
51 in commercial 2-stage snow blowerWorking height: Front PTO-driven snow implement
Snow Blower · Conditional fitmentKubota LX2980Requirement: Requires LX6971 front hitch and the correct LX20 mid-PTO driveline kit for LX4020.Snow Blower details: Oil-bath reduction gearboxes; hydraulic chute rotation; manual deflection; abrasion-resistant housing and impeller. Requires LX2940B front hitch on LX2620 or LX6971 front hitch on LX3520/LX4020 plus the correct mid-PTO driveline kit. Not compatible with LX2620 SU, LX3520DTN narrow, or LX3520 SU configurations.Fitment source: Kubota USA LX20 snow implements brochure - snow blower compatibility and requirements →
64 in commercial 2-stage snow blowerWorking height: Front PTO-driven snow implement
Sources
Kubota · official sourceKubota USA LX20 Series brochure - LA535, LA545 and BH77 specifications
Messicks · supplier referenceKubota LX4020HSD parts catalog - service filter references
Kubota · official sourceKubota USA LX20 brochure - RCK60-40LX and RC72-40LX mid-mount mower specifications
Kubota · official sourceKubota USA LX20 snow implements brochure - snow blower compatibility and requirements