JCBagriculturalmini crawler excavators
Jcb 8020
Maintenance schedule, common problems & OEM parts breakdown
The JCB 8020 CTS is a conventional tail swing mini excavator manufactured from 2007 to 2020. It weighs 2067 kg (4557 lbs) and is powered by a Perkins 403D-11 engine producing 14 kW (19 hp) net power. The machine features a 250 mm track width and a maximum digging depth of 253 cm (99.6 in). Configurations include ROPS/TOPS certified cabs with heaters, dual pattern controls, and optional handheld tool circuits. The 8020 CTS succeeded earlier 8000-series mini excavators and was followed by the 8026 CTS in the compact range.
Across its production life, the 8020 CTS maintained its core 14 kW engine output while refining its hydraulic block valve for faster cycle times and improved durability. The machine remains significant in the used and parts market due to its simple, non-DEF Dieselmax-style engine architecture and high-strength undercarriage, which offer lower lifetime maintenance costs compared to modern emissions-compliant competitors. Its compact 1 m (39.6 in) width allows access to confined urban sites where larger machines cannot operate.
Below: full specifications, fluids & capacities, the factory service schedule, common service parts, verified fault codes, what owners discuss, attachment guidance, the complete assembly directory, and a serial-number reference. Complete parts lists with full OEM part numbers, exploded diagrams, quantities, and fitment data are available free in Heavy Parts AI.
Jcb 8020 specifications
Engine
| Model | Perkins 403D-11 |
| Gross Power | 19.7 hp (14.7 kW) |
| Net Power | 14.2 kW (19 hp) |
| Displacement | 69.1 cu in (1132.3 cc) |
| Cylinders | 4 |
| Emissions Tier | Not documented for this exact serial range — verify with your dealer |
Weights
| Operating Weight | 4557 lb (2067 kg) |
| Shipping Weight | Not documented for this exact serial range — verify with your dealer |
| Ground Pressure | Not documented for this exact serial range — verify with your dealer |
Dimensions
| Transport Length | 141.74 in (3.6 m) |
| Transport Width | 39.6 in (1 m) |
| Transport Height | 93.6 in (2.38 m) |
| Track Gauge | 112.8 cm (44.4 in) |
| Ground Clearance | 6.0 in (15.2 cm) |
| Width Over Tracks | 100.6 cm (39.6 in) |
| Overall Width of Superstructure | 100.6 cm (39.6 in) |
Performance
| Travel Speed | Not documented for this exact serial range — verify with your dealer |
| Max Digging Depth | 99.6 in (253.0 cm) |
| Max Digging Reach | 170.4 in (432.8 cm) |
| Max Dumping Height | 110.4 in (280.4 cm) |
| Gradeability | 35% |
| Approach Angle | 25° |
| Bucket Tearout Force | 19.0 kN |
Service capacities (summary)
| Fuel Tank | 24 L (6.3 gal) |
| Hydraulic System | 28 L (7.4 gal) |
| Hydraulic Tank | 25 L (6.7 gal) |
| Engine Oil | 4 L (1.1 gal) |
| Cooling System | 5.3 L (1.4 gal) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
8020 fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | 4 L (1.06 US gal) | JCB engine oil (SAE 30 for standard applications; JCB Advanced engine oil for DPF-equipped low-emission engines) |
| Cooling system | Not documented for this exact serial range — verify with your dealer | JCB engine coolant (silicate-based multipurpose coolant) |
| Fuel tank | Not documented for this exact serial range — verify with your dealer | Diesel fuel |
| Transmission/powertrain compartments | Not documented for this exact serial range — verify with your dealer | Not documented for this exact serial range — verify with your dealer |
| Final drives (each) | Not documented for this exact serial range — verify with your dealer | Not documented for this exact serial range — verify with your dealer |
| Hydraulic system AND tank | 28 L (7.4 US gal) total; 25 L (6.6 US gal) hydraulic tank | JCB Special Hydraulic Fluid (ambient up to 30°C / 86°F) OR JCB Hydraulic Fluid 46 (ambient over 30°C / 86°F) |
| Axles/differentials | Not documented for this exact serial range — verify with your dealer | Not documented for this exact serial range — verify with your dealer |
| Grease | Not applicable | JCB grease (JCB boom grease or JCB blue grease) |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Jcb 8020 maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the 8020 beyond the schedule
Predictive Maintenance & Fluid Analysis
Baseline fluid samples at the 500-hour interval are critical for the 8020 CTS. Test engine oil, hydraulic fluid, and track gearbox oil for contamination and wear metals. The Perkins 403D-11 engine relies on clean fuel; inspect the primary and secondary fuel filters at 250 hours for water or debris. Monitor the hydraulic return filter magnet for metallic particles, which indicate pump or valve wear. Use JCB Special Hydraulic Fluid for temperatures up to 30°C (86°F) and JCB Hydraulic Fluid 46 for higher temperatures to maintain system efficiency.
Corrective & Common Repairs
Common failures on the 8020 CTS involve the Perkins 403D-11 glow plugs and fuel injectors, especially in cold climates. Check injector spray patterns during the 1000-hour service. The hydraulic block valve is a frequent service point; inspect seals for leaks and ensure the handheld tool circuit operates correctly. Track tensioners often require adjustment due to the machine's high-strength undercarriage design. Replace track rollers and idlers before excessive wear damages the track links, as the 250 mm track width concentrates ground pressure.
Overhaul & Rebuild Points
The 2000-hour service dictates the next five years of reliability. Measure swing ring play using dial indicators to detect bearing wear before it causes structural damage. Inspect the boom, arm, and chassis for cracks, particularly around weld points and high-stress areas. Torque slew ring bolts to specification to prevent catastrophic failure. If the Perkins 403D-11 engine shows excessive blow-by or loss of compression, plan for a rebuild. The hydraulic pump should be rebuilt if flow rates drop below 55.6 LPM (14.7 GPM) nominal output.
Seasonal & Environment Servicing
In cold weather, ensure the Perkins 403D-11 engine uses the correct viscosity oil (15W-40 or 10W-30 depending on ambient temperature) to aid cold starts. Check glow plug operation before each shift. In hot climates, monitor the coolant expansion tank for silicate separation, indicated by brown sludge, and replace coolant at the 500-hour interval to prevent corrosion. Inspect the engine fan guard kit and radiator fins for debris buildup. Use biodegradable hydraulic oil if operating near sensitive water sources.
8020 common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 17/929700 | Kit, Fuel Pump And Filter | Fuel system service | Check fitment → |
| 32/925666 | Element, Fuel Sediment/Water | Fuel system service | Check fitment → |
| 649/51689 | Hose, Fuel, Filter To Pump | Fuel system service | Check fitment → |
| 332/S3338 | Filter, Air, Assembly | Air intake service | Check fitment → |
| 32/925555 | Filter, Return, Filter, Return | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
8020 fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| P0087 | Fuel Rail Pressure Too Low | Fuel supply restriction, clogged filter, or lift pump failure. | Check fuel filters and lift pump operation. |
| P0112 | Intake Air Temperature Sensor Circuit Low Voltage | Short circuit to ground in the sensor wiring or faulty sensor. | Inspect harness for damage and check sensor resistance. |
| P0117 | Engine Coolant Temperature Sensor Circuit Low Voltage | Short circuit to ground in the coolant sensor wiring. | Check sensor connector and wiring harness integrity. |
| P0521 | Engine Oil Pressure Sensor Range/Performance | Faulty oil pressure sensor or out-of-range signal. | Test sensor output with a multimeter. |
| P2047 | Reductant Injector Circuit Open (SCR System) | DEF/AdBlue injector circuit fault or open connection. | Inspect injector wiring and connections. |
| U0100 | Lost Communication with Engine Control Module | CAN bus communication failure or poor ground connection. | Check battery voltage, ground straps, and CAN bus wiring. |
| 101 | Low Transmission Clutch Pressure | Hydraulic pressure loss in the transmission circuit. | Check hydraulic fluid levels and transmission pressure. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
8020 attachments & work tools
Digging Buckets
Available in mini, midi, and extra-heavy-duty (XHD) configurations with widths ranging from 160 mm to 760 mm (6 in to 30 in). Factory options include two standard digging/grading buckets sized at 900 mm and 1000 mm (35 in and 39 in). These tools are designed for efficient spoil removal and material retention in urban and landscaping applications.
Ditching Buckets
Offered in standard, V-shape, and tilting grading variants to accommodate trench maintenance and precise grading tasks. Heavy-duty and extra-heavy-duty versions are available for arduous environments. These buckets provide clean release of material and improved productivity for utility work.
Specialty Buckets
Includes concrete pouring buckets, riddle (skeleton) buckets, and jaw buckets for specialized material handling and demolition. Concrete pulverizers are also listed as compatible attachments for light demolition work. These tools expand the machine's utility beyond standard excavation.
Hydraulic Tools
The machine supports a handheld tool circuit option to power breakers, drills, pumps, and cutters. Auxiliary hydraulic flow is rated at 6.9 GPM (23 LPM), suitable for standard hydraulic hammers and rotary tools. This configuration allows the 8020 CTS to adapt to various job requirements without changing carriers.
Material Handling & Ripping
Compatible with pallet forks for material handling and ripper hooks/tooth assemblies for breaking hard ground or extracting roots. Ripper attachments are designed with specific pin dimensions (25 mm pin diameter) to fit the machine's mounting points. These tools enhance versatility for site preparation and cleanup.
Couplers & Mounting
Supports S-Lock couplers and tilt couplers for rapid tool changes. The machine is compatible with universal quick-attach systems, including those designed for Kubota-style quick couplers. Proper coupler selection is critical to ensure full warranty compliance and safe operation.
Guarding & Safety Options
Factory options include engine fan guard kits, FOPS roof guards, and JCB impact protection front screens. Additional safety features include dozer streetpads, counterweight protection bumper kits, and rotating or strobe beacons. These configurations protect the machine and operator in confined or high-risk work environments.
All 8020 assemblies by section
Every catalogued assembly group for the Jcb 8020. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
A Attachments
A4-2-1 Dozer, Long
| 13***5D | Setscrew, M10 X 20 | 4 |
| 13***5D | Bolt, M10x65 | 3 |
| 13***3D | Nut, Self Lock M10 | 3 |
A4-3-1 Dozer, Extension
| 33***20 | Pin, Retaining | 2 |
| 33***06 | Blade, Left Hand Wing | 1 |
| 33***07 | Blade, Right Hand Wing | 1 |
A4-1-1 Dozer
| 13***5D | Setscrew, M10 X 20 | 2 |
| 13***5D | Bolt, M10x65 | 3 |
| 13***3D | Nut, Self Lock M10 | 3 |
A4-4-1 Dozer, Extension, Long Dozer Option
| 33***03 | Pin, Retainer | 2 |
| 33***79 | Blade, Dozer Extension R/H | 1 |
| 33***80 | Blade, Dozer Extension L/H | 1 |
B Bodywork
B0-5-1 Tank, Fuel & Hydraulic, Assembly
| 13***3D | Setscrew, M10 X16mm | 6 |
| 13***7D | Setscrew, M10 X 25mm Long | 2 |
| 13***0D | Bolt, M10 X 40mm Long | 2 |
B0-1-1 Main Build
| 23***89 | Iso De Frost Data, Mini Excavators | 0 |
| 23***99 | Lubricant, Assembly | 1 |
| 23***34 | Upper Section, Assembly | 1 |
B0-3-1 Undercarriage, Index Including Tracks & Hydraulics
| 12***03 | Spacer, 14mm | 1 |
| 13***5D | Setscrew, M8x20 | 4 |
| 13***7D | Setscrew, M10 X 25mm Long | 6 |
B0-2-1 8020, Yellow
| 23***33 | Panel, Side, Assembly | 1 |
| 23***55 | Panel, Left Side, Assembly | 1 |
| 23***53 | Ga Boom 8020x, 8020x Mini Excavator | 1 |
B0-6-1 Frame, Rear, Assembly
| 23***20 | Kit, Battery 801x, Assembly | 1 |
| 23***43 | G.A, Power Unit, 8020x Mini Excavator | 1 |
| 23***44 | Tank, Assembly | 1 |
B0-4-1 Upper Structure
| 13***5D | Setscrew, M10 X 20 | 6 |
| 13***8D | Setscrew, M10 X 30 | 2 |
| 13***5D | Bolt | 4 |
B1-3-1 Lock, Engine Cover
| 13***1D | Screw, Set M6x12 | 1 |
| 13***1D | Nut, Plain | 2 |
| 13***3D | Nut, Self Lock M8 | 2 |
B1-11-1 Panel, Left Side, Skirt
| 13***5D | Setscrew, M8x20 | 4 |
| 14***3D | Washer | 2 |
| 14***7D | Washer, M8 Plain | 2 |
B1-5-1 Tank, Hydraulic
| 13***7D | Capscrew, M10 | 4 |
| 14***8D | Washer, M10 | 4 |
| 17***02 | Plug | 1 |
B1-13-1 Frame, Slew, Front
| 33***80 | Frame, Front Slew | 1 |
B1-12-1 Frame, Rear, Casting
| 33***46 | Frame, Rear Casting, 8020 | 1 |
B1-1-1 Front , Frame, Assembly
| 13***2D | Bolt, M10 X 50 | 1 |
| 13***3D | Bolt, M10 X130mm | 1 |
| 13***1D | Nut, M10 | 1 |
B1-10-1 Panel, Right Side, Skirt
| 13***5D | Setscrew, M8x20 | 4 |
| 14***3D | Washer | 2 |
| 14***7D | Washer, M8 Plain | 2 |
B1-2-1 Bonnet, Yellow, Assembly
| 13***5D | Setscrew, M8x20 | 1 |
| 13***8D | Setscrew, M10 X 30 | 4 |
| 13***01 | Nut | 7 |
B2-32-1 Seatbase, Components, Canopy
| 16***34 | Lock, Barrel Assembly | 1 |
| 26***00 | Clip | 1 |
| 33***01 | Moulding, Floor Plate | 1 |
B2-6-1 Glazing, Standard
| 33***24 | Cushion, Windscreen Spacer | 2 |
| 33***47 | Window, Up And Over Assembly | 1 |
| 33***48 | Glass, Assembly,, Standard | 1 |
B2-2-2 Seatbase, Cab
| 13***2D | Setscrew, M8 X 50 | 2 |
| 13***3D | Nut, M6 Lock | 3 |
| 14***6D | Washer, M6 Plain | 3 |
B2-8-1 Window, Front, Installation, En474 Protected
| 12***91 | Washer, Nylon | 8 |
| 13***1D | Nut, Plain | 1 |
| 16***42 | Stop, Bump | 1 |
B2-10-1 Door, Hinge
| 12***09 | Cap, Nut M8; Replaces 69***72 | 2 |
| 13***3D | Nut, Self Lock M8 | 2 |
| 14***7D | Washer, M8 Plain | 2 |
B2-22-1 Hammer, Emergency Glass Breaking
| 14***01 | Screw, Self Tapping | 2 |
| 26***78 | Hammer, Emergency, Glass Breaker; Supercedes 69***88, San 12499 | 1 |
| 26***79 | Holder, Hammer | 1 |
B2-11-1 Door, Assembly
| 33***08 | Hinge, Assembly | 2 |
| 33***74 | Handle, Door | 1 |
| 33***86 | Handle, Grab | 1 |
B2-42-1 Trim, Canopy
| 13***1D | Screw, M10x12 | 2 |
| 24***14 | Grommet | 1 |
| 82***44 | Washer, Nylon | 2 |
B2-4-1 Cab, Assembly, 332/V5247
| 33***10 | Wiper, Assembly | 1 |
| 33***16 | Liner, Roof | 1 |
| 33***19 | Cab, Electrics | 1 |
B2-17-1 Glazing, Roof
| 33***24 | Glass, Roof, Polycarbonate | 1 |
B2-5-1 Mountings, Cab
| 12***02 | Plate, Compression | 2 |
| 13***7D | Setscrew, M10 X 25mm Long | 2 |
| 13***8D | Setscrew, M10 X 30 | 2 |
B2-19-1 Cab, Tilt
| 13***3D | Setscrew, M8 X 16mm | 1 |
| 13***5D | Setscrew, M8x20 | 4 |
| 13***3D | Nut, Self Lock M8 | 6 |
B2-16-1 Liner, Roof
| 33***54 | Liner, Roof | 1 |
| 33***62 | Gasket, Foam | 1 |
B2-7-1 Glazing, Cab, Protected, En474
| 33***24 | Cushion, Windscreen Spacer | 2 |
| 33***55 | Window, Sliding, Right Side | 1 |
| 33***43 | Decal, Impact Protection | 1 |
B2-33-1 Levers, Housing, Left
| 12***03 | Tie, Cable, L=300mm X W=7.6mm | 1 |
| 13***7D | Setscrew, M8x25 | 2 |
| 13***8D | Setscrew, M10 X 30 | 2 |
B2-40-1 Canopy, Assembly
| 23***93 | Canopy, Tilt, Assembly | 1 |
| 33***00 | Protection, Paper | 1 |
| 33***16 | 801x/8020 Canopy Abi | 1 |
B2-20-1 Cab, Hinge
| 13***0D | Capscrew, M10 X 40 | 1 |
| 33***96 | Hinge, Machined, Left | 1 |
| 33***62 | Spacer | 1 |
B2-35-1 Seatbase, Components
| 16***34 | Lock, Barrel Assembly | 1 |
| 26***00 | Clip | 1 |
| 33***01 | Moulding, Floor Plate | 1 |
B2-34-1 Seatbase, Canopy
| 13***2D | Setscrew, M8 X 50 | 2 |
| 13***3D | Nut, M6 Lock | 6 |
| 14***6D | Washer, M6 Plain | 6 |
B2-24-1 Handle, Grab
| 33***84 | Handle, Grab | 1 |
| 82***68 | Rivet, Nut | 2 |
| 82***72 | Screw, Button Head, M6 X 15mm | 2 |
B2-31-2 Seatbase, Components, Cab
| 16***34 | Lock, Barrel Assembly | 1 |
| 26***00 | Clip | 1 |
| 33***01 | Moulding, Floor Plate | 1 |
B2-23-1 Sound Proofing, Seat Base
| 33***47 | Console, Sound Proofing, Seatbase | 1 |
| 33***48 | Console, Sound Proofing, Seatbase | 1 |
B2-2-1 Seatbase, Cab
| 13***2D | Setscrew, M8 X 50 | 2 |
| 13***3D | Nut, M6 Lock | 3 |
| 14***6D | Washer, M6 Plain | 3 |
B2-21-1 Seat Static Cloth
| 13***3D | Nut, Self Lock M8 | 4 |
| 14***2D | Washer, Large | 4 |
| 40***04 | Boot, Sewn | 1 |
B2-12-1 Rivet Nut Location, Cab
| 33***61 | Assembly, Cab Rivet Nuts | 1 |
| 82***99 | Nut, Rivet,M6 Open Ended | 6 |
| 82***03 | Nut, Rivet,M8 Open Ended | 4 |
B2-31-1 Seatbase, Components, Cab
| 16***34 | Lock, Barrel Assembly | 1 |
| 26***00 | Clip | 1 |
| 33***01 | Moulding, Floor Plate | 1 |
B2-32-2 Seatbase, Components, Canopy
| 16***34 | Lock, Barrel Assembly | 1 |
| 26***00 | Clip | 1 |
| 33***01 | Moulding, Floor Plate | 1 |
B2-34-2 Seatbase, Canopy
| 13***2D | Setscrew, M8 X 50 | 2 |
| 13***3D | Nut, M6 Lock | 6 |
| 14***6D | Washer, M6 Plain | 6 |
B2-25-1 Seals, Cab
| 33***58 | Seal, Cab Interface | 2 |
| 33***89 | Foam Seal, 10x10x1434 | 2 |
| 33***14 | Seal, Foam Strip, 10 X 10 X 834 | 2 |
B2-1-1 Cab, Assembly, Black
| 22***03 | Clip, Jubilee | 2 |
| 22***10 | Clip, Jubilee | 2 |
| 23***79 | Washer, Bottle, Assembly | 1 |
B2-35-2 Seatbase, Components
| 16***34 | Lock, Barrel Assembly | 1 |
| 26***00 | Clip | 1 |
| 33***01 | Moulding, Floor Plate | 1 |
B2-26-1 Canopy, Tilt
| 13***3D | Setscrew, M8 X 16mm | 2 |
| 13***5D | Setscrew, M8x20 | 4 |
| 13***3D | Nut, Self Lock M8 | 6 |
B2-41-1 Canopy, Assembly, Canopy Trim
| 33***10 | Canopy, Assembly, 801x/8020 | 1 |
B2-15-1 Door, Striker Bolt
| 15***00 | Nut | 1 |
| 33***91 | Guard, Striker | 1 |
| 33***10 | Striker, Door | 1 |
B2-9-1 Door Stay, Lockback
| 13***4D | Bolt | 3 |
| 13***3D | Nut, M6 Lock | 3 |
| 14***6D | Washer, M6 Plain | 6 |
B2-14-1 Trim, Cab
| 13***1D | Screw, M10x12 | 2 |
| 24***10 | Grommet, 24mm Dia | 3 |
| 24***12 | Grommet | 1 |
B4-4-1 Dipper, Extra Long
| 14***01 | Nipple, Grease, Straight, 1/8 Bsp | 1 |
| 14***01 | Nipple, Grease, 90deg. Angle | 1 |
| 33***49 | Hose, -6 Orfs Hp, 3200mm Long | 1 |
B4-2-1 Boom
| 14***01 | Nipple, Grease, Straight, 1/8 Bsp | 1 |
| 23***57 | Boom, Yellow | 1 |
| 80***08 | Bush, 40mm Long | 2 |
B4-3-1 Kingpost, Heavy Duty, Assembly
| 13***5D | Setscrew, M10 X 20 | 2 |
| 13***7D | Bolt, M10 X 75mm | 2 |
| 13***3D | Nut, Self Lock M10 | 2 |
B4-1-1 Excavator, Assembly
| 13***7D | Setscrew, M10 X 25mm Long | 4 |
| 13***5D | Bolt, M10x65 | 12 |
| 13***3D | Nut, Self Lock M10 | 15 |
B4-6-1 Tipping Link, Lifting Shackle
| 23***01 | Link, Tipping | 1 |
| 23***02 | Link, Lifting 1 Ton | 1 |
| 81***27 | Label, Lift Capacity | 1 |
B4-0-1 Ram, Protection
| 13***5D | Setscrew, M10 X 20 | 1 |
| 14***8D | Washer, M10 | 1 |
| 23***02 | Plate, Support | 1 |
B4-10-1 Link, Bucket
| 13***3D | Nut, Self Lock M10 | 2 |
| 14***01 | Nipple, Grease, Straight, 1/8 Bsp | 2 |
| 23***00 | Link, Tipping | 1 |
B5-0-1 English Language, Assembly
| 23***92 | Decals, Listing | 1 |
| 33***42 | Handbook | 1 |
| 81***63 | Label, Plantguard | 1 |
B5-1-1 Oil, Grease
| 40***00 | Fluid, Gear Oil | 0 |
| 40***00 | Oil, Engine | 0 |
| 40***15 | Oil, Hydraulic | 30 |
C Electrics
C1-11-1 Light, Working, Cab
| 12***09 | Cap, Nut M8; Replaces 69***72 | 4 |
| 13***7D | Setscrew, M8x25 | 4 |
| 14***7D | Washer, M8 Plain | 4 |
C1-8-1 Battery
| 13***7D | Setscrew, M10 X 25mm Long | 1 |
| 13***5D | Capscrew, M10 X 20 | 3 |
| 14***8D | Washer, M10 | 4 |
C1-9-1 Isolator Switch, Battery
| 13***5D | Setscrew, M6 X 20mm Long | 2 |
| 13***3D | Nut, M6 Lock | 2 |
| 14***6D | Washer, M6 Plain | 4 |
C1-10-1 Light, Working, Boom
| 70***29 | Light, Work | 1 |
| 72***21 | Harness, Boom Worklight | 1 |
C1-14-1 Beacon
| 70***01 | Bulb, 12v 55w, Halogen | 1 |
| 70***01 | Lens, Amber, 121mm Dia | 1 |
| 70***00 | Beacon, 12v, (155mm Tall) | 1 |
C1-1-1 Electrics, Fuses And Relays, Main Harness
| 33***22 | Harness, Electrical, Schematic | 0 |
| 33***73 | 801x Mainframe Harne, 8016 1018 With Immob | 1 |
| 71***03 | Fuse, 5 Amp | 2 |
C3-2-1 Electrics, Cab
| 13***3D | Nut, Self Lock M8 | 1 |
| 14***7D | Washer, M8 Plain | 2 |
| 33***19 | Cab, Electrics | 1 |
C3-6-1 Electrics, Canopy
| 13***3D | Nut, Self Lock M8 | 2 |
| 14***7D | Washer, M8 Plain | 2 |
| 33***20 | Cover, Harness | 1 |
C3-5-1 Heater, Assembly
| 13***3D | Setscrew, M8 X 16mm | 2 |
| 14***7D | Washer, M8 Plain | 2 |
| 22***03 | Clip, Jubilee | 2 |
C3-1-1 Panel, Instrument Cluster
| 23***31 | Board, Dash Cab, Assembly | 1 |
| 33***05 | Panel, Instrument Cluster | 1 |
| 33***88 | Decal, Panel | 1 |
C3-4-1 Motor, Wiper, Washer
| 29***00 | Jet, Washer, Assembly | 1 |
| 33***10 | Wiper, Assembly | 1 |
| 33***65 | Motor, Wiper | 1 |
C3-3-1 Washer Bottle, Screen
| 13***7D | Setscrew, M10 X 25mm Long | 1 |
| 14***8D | Washer, M10 | 1 |
| 23***79 | Washer, Bottle, Assembly | 1 |
D Controls
D1-4-1 Lever, Dozer Blade
| 13***5D | Setscrew, M8x20 | 3 |
| 13***3D | Setscrew, M10 X16mm | 1 |
| 13***0D | Setscrew, M10 X 40mm | 2 |
D1-8-1 913/10270, Control Rod
| 13***2D | Nut | 1 |
| 33***67 | Joint, Ball | 1 |
| 33***68 | Joint, Ball | 1 |
D1-1-1 Floor Control Assembly
D1-3-1 Lock, Slew
| 14***7D | Washer, M8 Plain | 1 |
| 21***05 | Pin, Split | 1 |
| 33***99 | Knob | 1 |
D1-2-1 Pedal Control, Auxiliary, & Grey Cover
| 13***3D | Nut, Self Lock M8 | 2 |
| 13***5D | Screw, Cap M5 X 20 | 4 |
| 13***8D | Capscrew, M8 X 80mm, Grade 12.9 | 2 |
D2-1-1 Control, Throttle
| 13***3D | Setscrew | 2 |
| 13***9D | Setscrew | 2 |
| 13***02 | Nut | 2 |
E Hydraulics
E0-3-1 Hydraulics, Upper Structure, Iso
| 33***32 | Valve, Assembly | 1 |
| 33***52 | Ga Pilot Hose Assembly 8 | 1 |
| 33***53 | Unit, Pmv, Assembly | 1 |
E0-2-1 Hydraulics, Excavator End
| 33***55 | Hose, -6 Hp 3100mm Long | 1 |
| 33***56 | Hose, -6 Hp 3100mm Long | 1 |
| 33***93 | Ram, Boom, Assembly | 1 |
E0-4-1 Hydraulics, Upper Structure, Sae Iso
| 33***32 | Valve, Assembly | 1 |
| 33***53 | Unit, Pmv, Assembly | 1 |
| 33***55 | Hose, Iso-Sae Pilot, Assembly | 1 |
E1-14-1 Hose And Pipework, Seat Base
| 23***01 | Sleeve, Polyurethane | 3 |
| 33***70 | Block, Manifold | 1 |
| 33***05 | Hose, -4 Pilot 1360mm Orfs | 1 |
E1-4-1 Hose And Pipework, Undercarriage
| 33***77 | Hose, -6 Hp 500mm Orfs | 1 |
| 33***79 | Hose, -6 Hp 500mm Orfs | 1 |
| 33***80 | Hose, -6 Hp 680mm Orfs | 1 |
E1-1-1 Undercarriage, Index Including Tracks & Hydraulics
| 12***03 | Spacer, 14mm | 1 |
| 13***5D | Setscrew, M8x20 | 4 |
| 13***7D | Setscrew, M10 X 25mm Long | 6 |
E1-9-1 Hose And Pipework, Pilot Line, Iso
| 33***71 | Hydraulics, Seatbase, Iso, Assembly | 1 |
| 33***25 | Hose, -4 Orfs Pilot 340mm | 1 |
| 33***48 | Hose, -4, 560mm, Orfs | 1 |
E1-11-1 Manifold Block, Adapters
| 13***4D | Bolt | 2 |
| 13***1D | Nut, M8 | 2 |
| 14***7D | Washer, M8 Plain | 4 |
E1-15-1 Rotary Coupling, Adapters, 10 Port
| 13***7D | Setscrew, M10 X 25mm Long | 4 |
| 14***8D | Washer, M10 | 4 |
| 17***04 | Adaptor, Orfs | 9 |
E1-10-1 Hose And Pipework, Auxiliary, Double Acting
| 13***5D | Setscrew, M8x20 | 1 |
| 14***7D | Washer, M8 Plain | 1 |
| 17***08 | Adapter, Orfs M/M | 1 |
E1-6-1 Hose And Pipework, Hydraulic Return, Tank
| 33***09 | Hose, -10 Hp 380mm Orfs | 1 |
| 33***04 | Hose, -4 Pilot 1600mm | 1 |
| 33***92 | Hose, -4 Pilot 500mm Orfs | 1 |
E1-20-1 Hose And Pipework, Bucket Ram, Extra Long
| 14***01 | Nipple, Grease, Straight, 1/8 Bsp | 1 |
| 14***01 | Nipple, Grease, 90deg. Angle | 1 |
| 33***49 | Hose, -6 Orfs Hp, 3200mm Long | 1 |
E1-12-1 Hose And Pipework, Pilot Line, Iso - Sae
| 33***95 | Hydraulics, Seatbase, Assembly | 1 |
| 33***25 | Hose, -4 Orfs Pilot 340mm | 1 |
| 33***48 | Hose, -4, 560mm, Orfs | 1 |
E1-3-1 Hose And Pipework, Seat Base
| 23***01 | Sleeve, Polyurethane | 3 |
| 33***56 | Bracket, Switch | 1 |
| 33***70 | Block, Manifold | 1 |
E2-2-1 Coupling, Pump
| 13***8D | Capscrew, M10x30 | 3 |
| 14***8D | Washer, Hardened | 3 |
| 33***74 | Plate, Spacer | 1 |
E2-1-1 Pump, Main
| 13***8D | Capscrew, M10x30 | 4 |
| 14***8D | Washer, Hardened | 4 |
| 17***0B | Adapter, Tee | 2 |
E2-10-1 Motor, Slew
| 17***04 | Adaptor, Orfs | 4 |
| 20***30 | Motor, Slew Assembly | 1 |
E2-3-1 Motor, Track, Sprocket & Adapters
| 13***8D | Capscrew, M10x30 | 24 |
| 17***04 | Adaptor, Orfs | 2 |
| 17***06 | Adaptor, Orfs | 2 |
E3-9-1 Valve, Pressure Maintenance, Adaptors And Fittings
| 13***5D | Setscrew, M8x20 | 2 |
| 13***5D | Setscrew, M10 X 20 | 2 |
| 14***7D | Washer, M8 Plain | 2 |
E3-10-1 Valve, Changeover
| 13***7D | Screw, M8x75 | 2 |
| 13***3D | Nut, Self Lock M8 | 2 |
| 14***7D | Washer, M8 Plain | 4 |
E3-11-1 Valve, Extension, Undercarriage
| 13***5D | Setscrew, M8x20 | 2 |
| 13***8D | Setscrew, M10 X 30 | 2 |
| 14***36 | Mounting, Bonded | 2 |
E3-1-1 Valve, Excavator, Adaptors And Fittings
| 13***5D | Setscrew, M8x20 | 4 |
| 13***8D | Setscrew, M10 X 30 | 3 |
| 14***36 | Mounting, Bonded | 3 |
E3-20-1 Valve, Joystick Control, Right
| 17***04 | Adaptor, Orfs | 6 |
| 25***17 | Controller, /Joystick, Right | 1 |
| 82***60 | Screw, Button Head, M6x25 | 4 |
E3-21-1 Valve, Joystick Control, Left
| 14***6D | Washer, M6 Plain | 4 |
| 17***04 | Adaptor, Orfs | 6 |
| 25***18 | Valve, L.H Joystick | 1 |
Jcb : 8020 : E Hydraulics : E04 Rams
J Track & Running Gear
J1-9-1 Track Assembly, Options, Rubber
| 33***13 | Track, Rubber, 250x38x96bk | 2 |
J1-7-1 Track Assembly, Steel
| 13***7D | Setscrew, M10 X 25mm Long | 12 |
| 13***3D | Nut, Self Lock M10 | 12 |
| 14***8D | Washer, M10 | 12 |
J1-8-1 Tensioner, Rubber Track Option
| 33***48 | Endplate Grease Unit | 2 |
| 33***80 | Adjuster, Spring Tensioner | 2 |
| 90***68 | Piston, Grease Tensioner | 2 |
J1-8-2 Tensioner, Rubber Track Option
| 33***44 | End Plate - Grease U | 2 |
| 33***48 | Tensioner, Spring | 2 |
| 90***68 | Piston, Grease Tensioner | 2 |
J1-2-1 Tensioner, Assembly, Rubber Tracks
| 13***09 | Bolt | 4 |
| 14***9D | Washer, M12 | 4 |
| 33***42 | Idler, Assembly | 1 |
J1-1-1 Undercarriage, Index Including Tracks & Hydraulics
| 12***03 | Spacer, 14mm | 1 |
| 13***5D | Setscrew, M8x20 | 4 |
| 13***7D | Setscrew, M10 X 25mm Long | 6 |
N Engine Perkins 403d-11 Gj65691
N0-1-1 Power Train, Assembly, Engine, Pump, Anciliaries
N1-6-1 Timing Levers, Arms & Springs
| 02***71 | Screw | 4 |
| 02***78 | Nut | 1 |
| 02***08 | Washer | 1 |
N1-5-1 Timing Case, Camshaft & Gears, 403d-11 Tier-3
| 02***68 | Key | 1 |
| 02***79 | O Ring | 1 |
| 02***81 | Bearing | 1 |
N1-1-1 Engine Assembly, With Fuel Pump Kit
| 02***38 | Gasket | 0 |
| 02***39 | Gasket | 0 |
| 02***43 | Nut | 0 |
N1-7-1 Flywheel & Housing
| 02***36 | Ring, Starter | 1 |
| 02***37 | Screw | 6 |
| 02***66 | Flywheel Backplate | 1 |
N1-4-1 Fan,Pulleys,Belt, 403d-11 Tier-3
| 02***66 | Pulley, Crankshaft | 1 |
| 02***67 | Nut | 1 |
| 02***68 | Key | 1 |
N1-3-1 Crankshaft,Pistons, Bearings & Con-Rods
| 02***42 | Key | 1 |
| 02***43 | Pin | 1 |
| 02***52 | Bush, Small-End | 1 |
N1-8-1 Mountings, Engine
| 13***8D | Setscrew, M10 X 30 | 9 |
| 13***4D | Screw, M10x60 | 3 |
| 13***3D | Nut, Self Lock M10 | 8 |
N1-2-1 Engine Block, 403d-11 Tier-3
| 02***05 | Plug, D=5.4mm | 1 |
| 02***07 | Plug, 8.4mm | 5 |
| 02***08 | Hub | 1 |
N2-3-1 Rocker Cover, 403d-11 Tier-3
| 01***54 | Adapter, Oil Cap | 2 |
| 02***73 | Breather, Gauze | 1 |
| 02***76 | Nut, Cap | 3 |
N2-1-1 Cylinder Head
N2-2-1 Rocker Assembly, Push Rods & Tappets
| 02***78 | Nut | 3 |
| 02***66 | Spring | 2 |
| 02***67 | Screw, Adjusting | 6 |
N2-4-1 Lifting Plates, 403d-11 Tier-3
| 02***12 | Screw | 2 |
| 02***52 | Plate, Engine Lifting | 2 |
N3-3-1 Exhaust System
| 22***17 | Clip, Worm Drive | 2 |
| 33***18 | Pipe, Inlet Manifold | 1 |
| 33***63 | Coupling, Flexible Exhaust | 1 |
N3-2-1 Air Filter
| 22***10 | Clip, Jubilee | 3 |
| 22***12 | Clip, Jubilee | 1 |
| 33***38 | Filter, Air, Assembly | 1 |
N3-1-1 Manifold, Exhaust
| 02***96 | Nut | 2 |
| 02***85 | Stud | 2 |
| 02***39 | Gasket | 1 |
N4-3-1 Radiator & Hoses, Assembly
| 13***1D | Screw, Set M6x12 | 6 |
| 13***7D | Setscrew, M8x25 | 4 |
| 14***1Z | Washer, 2 Ba | 2 |
N4-1-1 Water Pump, 403d-11 Tier-3
| 02***96 | Nut | 1 |
| 02***33 | Hose, By-Pass | 1 |
| 02***39 | Gasket | 1 |
N4-2-1 Thermostat &, Housing, 403d-11 Tier-3
| 02***96 | Nut | 4 |
| 02***85 | Stud | 4 |
| 02***89 | Plug, D=30mm | 2 |
N5-2-1 Pump, Oil, 403d-11 Tier-3
| 02***07 | Spring | 1 |
| 02***08 | Dowel | 3 |
| 02***10 | Pump, Oil & Gear Assembly | 1 |
N5-1-1 Sump, Oil, 403d-11 Tier-3
| 02***02 | Screw | 20 |
| 02***96 | Gasket | 1 |
| 02***97 | Screw | 2 |
N5-3-1 Filter, Oil, 403d-11 Tier-3
| 02***26 | Connector | 1 |
| 02***28 | Bolt, Banjo | 1 |
| 02***59 | Washer | 4 |
N6-5-1 Filter, Fuel Sediment
| 32***02 | Ring, Retaining | 1 |
| 32***03 | Seal, Dust | 1 |
| 32***66 | Element, Fuel Sediment/Water | 1 |
N6-4-1 Fuel Pump & Filter
| 02***78 | Nut | 1 |
| 02***02 | Screw | 2 |
| 02***94 | Gasket | 1 |
N6-2-1 Injector,Fuel & Pipe
| 02***96 | Nut | 2 |
| 02***66 | Washer | 2 |
| 02***14 | Damper | 4 |
N6-3-1 Fuel System
| 13***3D | Setscrew | 2 |
| 13***5D | Setscrew, M8x20 | 1 |
| 13***9D | Setscrew, M10 X 35mm Long | 2 |
N6-1-1 Pump,Fuel, & Solenoid
| 02***96 | Nut | 2 |
| 02***01 | Washer | 1 |
| 02***76 | Shim, 0.20mm | 1 |
8020 serial number reference
For the JCB 8020 mini excavator, the machine identification plate is located on the front face of the upper structure, on either the right or left side. The serial number is also stamped into the chassis frame as a backup if the plate is missing or worn. Modern JCBs use a 17-character PIN where the 10th character encodes the manufacturing year; older models may have shorter serials. Verify applicability with a JCB dealer if the plate is unreadable.
| Prefix | Identifies | Notes |
|---|---|---|
| 1284000 to 1284999 | Applicability: JCB 8020 mini excavator. This serial range is explicitly defined in the JCB 8020 Service Repair Manual (document 1-19803/9600-1) for general information, identification plates, and torque settings. |
Frequently asked questions
What engine does the JCB 8020 CTS use?
The JCB 8020 CTS uses a Perkins 403D-11 diesel engine with 1132.3 cc displacement, producing 14 kW (19 hp) net power.
What is the operating weight of the JCB 8020 CTS?
The operating weight is 2067 kg (4557 lbs) to ISO 6016 standards, including cab, rubber tracks, standard dipper, 300 mm bucket, full tanks, and a 75 kg operator.
What model replaced the JCB 8020 CTS?
The JCB 8020 CTS was succeeded by the JCB 8026 CTS in the compact excavator lineup.
What 8020 owners discuss
What engine powers the JCB 8020 CTS and what are its key performance characteristics?
The JCB 8020 CTS is powered by a 14.2 kW engine. This power unit is engineered to produce high torque at low revolutions per minute, providing sufficient power for demanding tasks while maintaining fast cycle times. The machine is designed to minimize operator exertion to maximize productivity.
What are the typical hydraulic behaviors and common failures reported for this machine type?
Operators note that the hydraulic system can overheat during heavy use. A known failure mode in the pressure maintenance valve block involves shuttle valves unscrewing, allowing ball bearings to rattle in the orifice. This causes servo pressure to remain correct while pump pressure drops significantly below maximum. Additionally, power and flow may slow down, requiring a second function to be selected to restore normal movement.
What undercarriage and wear patterns are typical for the JCB 8020 CTS?
The machine features a high-strength undercarriage with a track width of 250 mm. It is equipped with rubber tracks suitable for challenging work environments. The operating weight is 2067 kg (4557 lb) to ISO 6016 standards, including the cab, tracks, standard dipper, 300 mm bucket, full tanks, and a 75 kg operator.
What are common engine quirks or starting issues associated with JCB engines in this class?
Difficulty starting is a common issue, often caused by simple battery problems or complex fuel system faults. Owners should inspect fuel lines, injectors, and pumps for blockages or leaks. Low power output may result from damaged catalytic converters, exhaust manifolds, or mufflers. Engine control module malfunctions can also cause power loss. Early Dieselmax engines (Tier 2 and early Tier 3) are prone to big end bearing failures on the crankshaft if oil change intervals are stretched.
What are common electrical or sensor issues reported by owners?
Electrical faults can mimic mechanical transmission failures. The forward/reverse lever operates microswitches that activate hydraulic solenoids on the transmission body. A faulty forward microswitch or inhibitor switch can cause the machine to rev up without moving forward, even if reverse works. Operators should verify voltage at the forward solenoid and check the wiring color codes against schematic diagrams. Control module malfunctions may also trigger power loss symptoms.
What should be checked when buying a used JCB 8020 CTS?
Verify the serial number range (S/N the OEM part reference onwards for the 8020) to ensure correct service manual applicability. Check the pressure maintenance valve block for loose shuttle valves and rattling ball bearings. Inspect the engine for signs of big end bearing failure in early Dieselmax generations. Test the forward/reverse microswitches and solenoids for proper electrical engagement. Confirm the condition of the rubber tracks and high-strength undercarriage components.
What safety-critical fixes require dealer verification?
Have your dealer verify the ROPS/FOPS certification status of the cab and the integrity of the engine control module diagnostics. Safety protocols for lifting operations require an approved lifting point and a fitted bucket with weight deducted from lift capacities. Verify local emissions compliance and noise certification data, as these are not always documented for specific serial ranges.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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