Jcb 8056
JCBagriculturalmini crawler excavators

Jcb 8056

Maintenance schedule, common problems & OEM parts breakdown

The JCB 8056 is a mini crawler excavator produced from approximately 2015 onward, succeeding the 8055 model. It is powered by a 41 kW (55.78 HP) diesel engine. The machine falls within the compact excavator class, designed for utility trenching and general excavation in confined spaces. Configurations include standard and CTS (Compact Tail Swing) variants, allowing operation in tight areas without requiring additional clearance behind the machine.

The 8056 represents JCB's shift toward EcoMAX and Dieselmax engine families, which utilize extended 500-hour oil change intervals compared to the 250-hour schedules of older JCB models. This change reduces downtime and operating costs, making the 8056 a cost-effective option in the used market. Its compact design and reliable hydraulic system ensure it remains a popular choice for municipal and utility contractors who require maneuverability without sacrificing power.

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 8056 specifications

Engine

ModelIsuzu 4JGI
Emissions TierU.S. EPA Non-road Tier 4 Final
Displacement3.1 l (189.7 cu in)
Cylinders4
Net Power43 kW (57.7 HP)
Gross Power44.5 kW (59.7 HP)
Rated Speed2300 r/min
AspirationTurbocharged-Aftercooled
GovernorADEM A4

Weights

Operating Weight5991 kg (13,208 lb)
Specific Ground Pressure36.3 kPa (5.3 psi)

Dimensions

Width (Outside of Tracks)2000 mm (78.7 in)
Height to Cab Upper Part2662 mm (104.8 in)
Track Width1800 mm (70.9 in)
Track Shoe Dimensions400 mm (15.7 in)
Counterweight Ground Clearance642 mm (25.3 in)
Rear Platform Swing Radius1300 mm (51.2 in)
Caterpillar Track Length on Ground Level1991 mm (78.4 in)

Performance

Maximum Travel Speed4.4 km/h (2.7 mph)
Swing Speed9.4 rev/min
Maximum Excavation Depth4133 mm (13.6 ft)
Maximum Radius Along Ground Level6182 mm (20.3 ft)
Maximum Cut Height5679 mm (18.6 ft)
Maximum Loading Height3988 mm (13.1 ft)
Maximum Vertical Wall Digging Depth2486 mm (8.2 ft)
Hydraulic Pump Flow Rate150 l/min (39.6 gpm)
Hydraulic System Overflow Valve Pressure22994 kPa (3335 psi)
Maximum Torque192 Nm (142 lb-ft) at 1800 rev/min

Service Capacities (Summary)

Fuel Capacity70 l (18.5 gal)
Cooling System Fluid Volume11 l (2.9 gal)
Hydraulic System Fluid Volume67 l (17.7 gal)
Engine Oil Volume9.6 l (2.5 gal)

Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.

Jcb 8056 maintenance schedule

Service intervalTasks
Every 10 h
  • Check engine oil level via dipstick.
  • Check hydraulic oil level via sight gauge.
  • Check coolant level in expansion tank.
  • Inspect for fluid leaks around engine bay, axles, and rams.
  • Inspect track tension and roller condition.
  • Check safety equipment including seat belt, mirrors, and backup alarm.
Every 250 h
  • Change engine oil and replace oil filter.
  • Replace primary and secondary fuel filters.
  • Inspect and clean or replace air filter element.
  • Check alternator, A/C, and fan belt tension.
  • Grease all pivot points on boom, arm, and bucket.
  • Inspect hydraulic return filter magnet for metallic debris.
Every 500 h
  • Change engine oil and replace oil filter.
  • Replace primary and secondary fuel filters.
  • Inspect and clean or replace air filter element.
  • Check alternator, A/C, and fan belt tension.
  • Grease all pivot points on boom, arm, and bucket.
  • Inspect hydraulic return filter magnet for metallic debris.
Every 1,000 h
  • Drain, flush, and refill engine coolant with JCB-spec long-life coolant.
  • Change transmission oil and replace transmission filter.
  • Change front and rear axle oil including hubs.
  • Perform full ECM diagnostic scan using JCB ServiceMaster tool.
  • Torque check slew ring bolts on JS-series excavators.
  • Measure undercarriage components against JCB wear limits.
Every 2,000 h
  • Change hydraulic oil and clean hydraulic tank.
  • Inspect structural components (boom, arm, chassis) for cracking.
  • Measure swing ring play using dial indicator.
  • Inspect brake disc wear and immersed brake condition.
  • Check injector spray pattern via diagnostic tool.
  • Service cab HVAC system including A/C pressure and cabin filter.

Servicing the 8056 beyond the schedule

Predictive Maintenance & Fluid Analysis

At the 500-hour interval, collect oil samples from the engine, hydraulic tank, and axle systems to establish a baseline for wear metals and contamination. Inspect the hydraulic return filter magnet for metallic debris during every 250-hour service. Use JCB ServiceMaster to monitor ECM fault codes and engine parameters. Regular fluid analysis allows for early detection of bearing wear or seal failure, preventing catastrophic hydraulic pump damage in the 8056's closed-loop system.

Corrective & Common Repairs

Address fuel system issues promptly, as dirty fuel is a primary cause of injector failure on Dieselmax and EcoMAX engines. Replace primary and secondary fuel filters at 250-hour intervals to protect the high-pressure injection system. Inspect track tension regularly; excessive sag or tightness accelerates roller and idler wear. Check belt tension on the alternator and A/C compressor to prevent slippage and overheating in the compact engine bay.

Overhaul & Rebuild Points

The 2000-hour service is critical for long-term health, requiring a full hydraulic oil change and tank cleaning. Measure swing ring play using a dial indicator to detect excessive radial or axial movement before it causes structural damage. Inspect the turbocharger shaft play and wastegate function on Dieselmax units. Check injector spray patterns via diagnostic tool to ensure efficient combustion and prevent carbon buildup in the exhaust system.

Seasonal & Environment Servicing

In cold climates, ensure the coolant system is filled with JCB-spec long-life coolant to prevent freezing and corrosion. Check the cabin HVAC system, including A/C pressure and evaporator condition, to maintain operator comfort. In dusty environments, inspect the air filter restriction indicator frequently and clean or replace the element as needed. Verify that the DEF tank (if fitted) is free of contamination and that the AdBlue system is functioning correctly to meet emissions standards.

8056 common service parts

Part numberPart
704/30200Filter, Fuel-DieselCheck fitment →
9091505100WasherCheck fitment →
32/925628Filter, Fuel Sediment/WaterCheck fitment →
32/925666Element, Fuel Sediment/WaterCheck fitment →
234/29293G.A., Fuel Filter Assembly, 8056 ChinaCheck fitment →

Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.

8056 fault codes & troubleshooting

CodeMeaningLikely causeWhat to do
P0087Fuel rail/system pressure too lowClogged fuel filter or failing lift pumpCheck fuel filters and pump operation
P0117Engine coolant temperature sensor circuit low voltageFaulty coolant sensor or wiring shortInspect sensor circuit and connector
P0521Engine oil pressure sensor range/performance issueFaulty oil pressure sensor or low oil levelVerify oil level and test sensor signal
P2047DEF/AdBlue injector circuit open (SCR system fault)Open circuit in reductant injector wiringInspect injector harness and connections
U0100Lost communication with Engine Control Module (ECM)CAN bus wiring fault or poor groundCheck battery voltage and CAN bus integrity
101Low transmission clutch pressure detectedHydraulic pressure loss or sensor faultCheck hydraulic fluid and pressure readings
203 EN TMPEngine temperature EMS electrical faultOpen circuit in temperature sensor or wiringInspect sensor wiring and connector pins
218 HYD PMPHydraulic pump EMS electrical faultOpen circuit in pump sensor or solenoidCheck hydraulic pump sensor circuit
300 EC1 CANECU 1 CAN communication faultCAN bus network interruptionVerify CAN bus termination and wiring
P0112Intake air temperature sensor malfunction (low voltage)Short circuit to ground in sensor wiringInspect intake air sensor and harness

Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.

8056 attachments & work tools

Buckets

JCB offers a range of buckets for the 8056 mini excavator, including Deep Profile, Ditch Maintenance, Grading, Heavy Duty, Jaw, Ribbed, Tapered Ditching, and Tilting Grading variants. These tools are designed to improve productivity, efficient digging, material retention, and clean release of material.

Quickhitches

The 8056 utilizes hydraulic or mechanical quick hitches to facilitate rapid tool changes. JCB provides Q-Fit pick-up systems for lifting equipment to ensure easy attachment and improved operator visibility.

Hydraulic Breakers

JCB offers an OEM hydraulic breaker range designed for demolition, trenching, and concrete breaking. These attachments are compatible with backhoe loaders, excavators, and skid steer loaders, providing high performance and precision.

Specialist Attachments

The 8056 supports specialist attachments for tough applications, including earth drills/augers, patch planers, and lifting equipment with capacities ranging from 0.15 to 4 tonnes.

Tilt Rotators

Tilt rotators are available as advanced accessories for the 8056, enabling attachments to tilt up to 45 degrees and rotate 360 degrees. This integrated hydraulic system allows for complex tasks like grading and trenching on slopes without repositioning the machine.

All 8056 assemblies by section

Every catalogued assembly group for the Jcb 8056. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

A Attachments
A2-1-2 Bucket, 675mm
A2-1-4 Bucket, Grading
13***12Bolt1
13***1ZNut1
13***3ZNut1
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A2-1-8 Bucket, Heavy Duty, China 8056
13***4ZBolt2
13***1ZNut10
14***01Nipple, Grease, Straight, 1/8 Bsp4
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A2-1-1 Bucket, Heavy Duty
13***4ZBolt2
13***1ZNut6
14***01Nipple, Grease, Straight, 1/8 Bsp4
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A3-21-1 Kerbgrab, Manual, 180 Kg Swl
14***18Seal, Bonded, 1/2" Bsp2
14***4DWasher2
16***04Adapter2
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A3-35-45 Hydraulic Rotator
20***75Shim1
20***76Washer1
20***77Pin, Wedge1
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A3-35-40 Kerbgrab
13***3DNut, Self Lock M103
13***5DCapscrew, M10 X 203
14***01Nipple, Grease, Straight, 1/8 Bsp2
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A3-36-1 Kerbgrab, Hydraulic, 180 Kg Swl
13***6ZBolt, M16 X 70mm4
13***3ZNut, M164
14***15Washer, Seal; Replaces Khj08912
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A3-21-5 Kerbgrab, Manual, 180 Kg Swl
98***44Attachment, Manual Kerbgrab Base, 70kgswl1
98***24Grab, Kerb 180kgswl, Manual Rotation1
98***32Body1
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A3-1-1 Quick Hitch, Mechanical
12***68Collar2
12***57Latch1
12***61Bolt, Trunnion2
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A4-5-1 Dozer Blade, 2012mm Wide, Hbcv
A4-7-1 Dozer, Mounting
13***7DSetscrew, M10 X 25mm Long2
13***8DBolt, M10 X 804
13***3DNut, Self Lock M104
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A4-6-1 Dozer Blade, 2012mm Wide, Hbcv
14***07Nipple, Grease, 45 Deg. Angle2
23***12Dozer, Mounting, Assembly1
33***28Blade, Dozer1
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A4-2-1 Blade, Dozer, 2020mm Wide
13***7DSetscrew, M10 X 25mm Long2
13***9DBolt4
13***3DNut, Self Lock M104
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A4-8-1 Dozer, Mounting
13***7DSetscrew, M10 X 25mm Long2
13***3DNut, Self Lock M104
13***8DCapscrew, Socket Head, M10 X 80mm2
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B Bodywork, Cab, Loader End
B1-5-6 Hinge, Rear Cover
14***01Nipple, Grease, Straight, 1/8 Bsp1
21***09Pin, Tension1
23***00Hinge1
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B1-4-5 Seals China Build, Anti Re-Circ Kit
90***20Seal, Edging1
92***00Seal, Self Adhesive, 13mm Diameter; 3150mm Long. Fitted To Canopy Machines Without Front Screen Only, Seal, Self Adhesive, 13mm Diameter1
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B1-5-5 Hinge, Side Cover
14***01Nipple, Grease, Straight, 1/8 Bsp2
23***00Wa Hinge Plate1
23***00Hinge, Wa Cover1
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B1-4-3 Floorplate, And Insulation
33***17Insulator, Battery Terminal1
33***53Plate, Floor1
81***20Gasket, Demister1
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B1-4-4 Seal, Foam
23***07Seal, Strip, 50 Metre Roll1
33***59Strip, Sealing, Foam1
33***62Strip, Foam1
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B1-6-4 Cover, Engine
13***8ZBolt4
13***1ZSetscrew, M6 X 12mm Long2
13***7ZBolt6
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B1-6-2 Covers, Engine
13***8ZBolt4
13***3DSetscrew1
13***8DBolt, M6 X 301
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B1-4-6 Radiator/Oil Cooler, Anti-Recirculation, Seals
23***07Seal, Strip, 50 Metre Roll1
33***62Strip, Foam1
33***69Seal1
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B1-6-5 Cover, Side Assembly
23***00Hinge, Assembly1
23***01Cover, Engine, Yellow1
23***35Cover, Side Assembly, Yellow1
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B1-5-4 Lock, Rear Cover
13***8ZBolt2
13***1ZSetscrew, M6 X 12mm Long1
13***1ZNut, M5-82
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B1-1-2 Soundproofing, Side Skirt
33***11Insulator, C/Weight, Soundproofing1
33***32Insulator, Side Skirt1
33***33Insulator, Rh Skirt Soundproof1
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B1-4-8 Rubber Mat, Over Counterweight
13***05Bolt1
33***17Moulding, Rubber1
33***00Mat1
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B1-5-2 Guard, Chaff
13***5ZBolt7
14***6ZWasher, M67
23***06Guard, Chaff1
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B1-2-3 Tank, Diesel Fuel
13***2ZBolt, Bolt; Qty Was 1 Off Before New Plate. Old Fasteners Were 13***8z X 2 & 13***2z X 11
13***3ZBolt, M10 X 551
13***5ZBolt1
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B1-4-7 Radiator/Oil Cooler, Anti-Recirculation, Seals Hot Climate
23***07Seal, Strip, 50 Metre Roll1
23***06Kit, Anti Re-Circ Foam1
33***59Strip, Sealing, Foam1
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B1-1-1 Mainframe, And Counterweight
13***5DSetscrew, M10 X 206
13***8DSetscrew, M10 X 301
13***9DSetscrew, M10 X 35mm Long4
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B1-3-2 Tank, Hydraulic
13***7DSetscrew, M10 X 25mm Long3
14***8DWasher, M103
17***03Plug, Blanking1
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B1-5-3 Lock, Side Cover
13***8ZBolt2
13***1ZSetscrew, M6 X 12mm Long1
13***1ZNut, M5-82
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B2-6-8 Re-Circ Slider
B2-6-5 Re-Circ Slider, China Build
33***99Knob1
33***93Plate, Re-Circ Slider1
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B2-6-1 Pod L/H, Control Assy.
13***3ZNut2
13***1DNut, M84
13***3ZNut, Self Lock, M83
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B2-4-1 Cab, Glazing
23***07Seal, Weather, Front Lower1
23***01Glass, Quarter Clear, Left Hand1
23***04Glass, Rear Clear1
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B2-3-4 Direct Glazing, Replacement Material
41***33Sealant, Dp2205 Clear, Silicone0
41***09Sealant, Black Acrylic 221, 310ml Cartridge0
41***09Adhesive, Jcb Ultrafast, 310ml Cartridge0
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B2-4-3 Window, Side Opening
14***04Screw4
23***00Window, Side, Opening1
33***47Rubber, Glazing2
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B2-2-14 Grille, Fresh Air
32***89Filter, Air Intake Gauze1
33***50Seal, Foam1
33***95Grille1
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B2-3-5 Mirror, Rear View External
B2-6-7 Seatbase Abi, Aircon Mounting
13***5ZScrew, M5 X 203
14***5DWasher3
33***43Plate, Fuse - Relay Mountin, G1
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B2-6-6 Floormat, China 8056
23***08Ga Floormat 80561
33***39Strip, Kick1
33***01Strip1
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B2-5-3 Seat, Suspension
40***05Kit, Back Foam1
40***13Kit-Upstop/Bumpstop1
40***14Kit, Knob/Weight Adjuster1
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B2-3-2 Door, Assembly, 8056 China
12***69Bolt, Striker Assembly, Cab Door Lock1
13***8DSetscrew, M8 X 30mm4
13***3ZNut, Self Lock, M86
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B2-1-2 Cab Shell
12***05Bolt, Closing1
12***00Mirror, With Bracket1
13***7ZScrew, M6 X 25mm Long2
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B2-6-3 Control Pods, Mountings
13***7DSetscrew, M8x255
13***8DSetscrew, M8 X 30mm8
13***1DNut, M85
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B2-2-1 Cab, And Mountings
13***3ZNut, M164
23***07Seal, Strip, 50 Metre Roll1
23***91Cab, Abi 80561
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B2-6-4 Seatbase
13***5DSetscrew, M8x201
13***7DSetscrew, M10 X 25mm Long14
13***3DNut, M6 Lock4
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B2-4-2 Windscreen, Assembly
13***3ZNut, Lock, M101
14***8ZWasher, Plain M10; San 23620 Ref Dave Bickerton Confirms Identic, Al To 33***8z Rationalise Parts4
23***01Roller, Window4
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B2-7-4 Seat, Suspension
40***14Kit, Knob/Weight Adjuster1
40***00Armrest, Kit1
40***00Kit, Headrest1
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B2-2-2 Cab Shell
12***05Bolt, Closing1
12***00Mirror, With Bracket1
13***7ZScrew, M6 X 25mm Long2
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B2-6-2 Pod R/H, Control Assembly
13***3ZNut, Self Lock, M82
14***7ZWasher, Plain, M8; Replaces Khn1550, San 126202
23***55Ga Rh Controller1
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B2-1-1 Cab, And Mountings
13***3ZNut, M164
23***07Seal, Strip, 50 Metre Roll0
33***24Cab, Mount 80564
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B4-1-3 Dipper, China 8056
14***01Nipple, Grease, Straight, 1/8 Bsp3
23***03Spacer2
23***04Spacer1
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B4-6-1 Link, Lifting - Lug
12***77Link, Bucket1
81***93Decal, W (Kg)1
91***00Link, Bow. 1 Ton Swl1
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B4-7-1 Y
12***00Link, Bucket + 2 Ton Hook1
81***93Decal, W (Kg)1
91***00Link, Bow. 1 Ton Swl1
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B4-1-2 Link Assembly, Bucket
12***76Link, Bucket1
13***3DNut, Self Lock M105
13***8DCapscrew, Socket Head, M10 X 80mm1
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B4-1-4 Protection Plates, Boom Ram
13***5ZScrew, M10 X 20mm Long; Use With Single Piece Casing. To Gearbox Number 445/143/831 Or 445/144/455, Screw, M10 X 20mm Long1
23***03Plate, Ram Guard1
33***41Plate, Ram Protection1
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B4-1-1 Boom
14***01Nipple, Grease, Straight, 1/8 Bsp1
23***03Pin, Pivot1
23***04Spacer1
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B4-1-0 Dig End, Chinese, 8056
13***0DBolt, M10 X 40mm Long2
13***3DBolt1
13***3DNut, Self Lock M103
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B5-1-1 Oils, Grease & Paint
23***38Paint, Yellow Gloss, 1 Litre1
40***00Oil, Engine1
40***01Oil, Engine, Sae30, 200 Litres1
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B5-4-1 Toolkit
40***12Grease, Jcb Special Mpl0
40***01Grease, Mpl-Ep, 400g.1
82***06Spanner, D.O.E., 1" X 1.1/8" A/F0
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B5-5-1 Labels, And Decals, 8056 China Only
14***8DWasher, M102
14***8DWasher, Spring, M102
23***01Cover, Handbook1
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B5-6-1 Fire Extinguisher
13***5ZScrew, M10 X 20mm Long; Use With Single Piece Casing. To Gearbox Number 445/143/831 Or 445/144/455, Screw, M10 X 20mm Long2
13***3ZNut0
13***3ZNut, Lock, M102
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C Electrics-Machine, Cab & Engine
C1-1-2 Flashing Beacon
70***01Bulb, 12v 55w, Halogen1
70***01Lens, Amber, 146mm Dia1
70***00Beacon, 12v, (155mm Tall)1
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C1-1-1 Worklight, Chinese, 8056
13***5DSetscrew, M10 X 201
13***3DNut, Self Lock M101
14***3ZWasher2
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C1-0-0 Electrics, Main
13***5ZScrew, Hexagon M8 X 20mm Long1
13***3ZNut, Self Lock, M81
33***29Harness, Mainframe1
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C2-4-2 Alternator
23***08G.A, Main Electrics1
71***17Alternator, 80a1
71***56Kit-Through Bolt1
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C2-1-1 Battery
13***7DSetscrew, M10 X 25mm Long2
14***1ZWasher2
14***8DWasher, M102
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C2-3-2 Motor, Starter
12***06Cover, Solenoid1
71***06Kit-Brush1
71***07Holder, Brush, Assembly1
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C2-2-1 Electrical Equipment
02***84Lead, Starter Earth1
17***21Valve, Mag,Engine Stop1
17***23Wire, Lead ,Mag Valve1
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C2-5-1 Alternator Mountings
12***52Spacer1
13***8DSetscrew, M8 X 30mm2
13***3ZBolt, M8x130 Long1
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C3-1-3 Reciever Drier, 31.12.07
13***5DSetscrew, M10 X 202
13***1DNut, M102
14***8DWasher, M104
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C3-1-10 Air Conditioning, 01.01.08
12***03Tie, Cable, L=300mm X W=7.6mm4
14***3ZWasher, Lock ,7/16"1
22***04Clip, Jubilee8
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C3-1-2 Condensor, Aircon 31.12.07
C3-3-3 Washer Bottle, Assembly
29***00Jet, Washer, Assembly1
33***73Bottle, Washer, 145mm Wide1
33***23Pump, Washer Bottle,12v1
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C3-6-3 Radio Cassette
14***6ZWasher, M64
33***32Box, Speaker2
71***00Aerial1
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C3-4-2 Worklight, Boom
13***5ZScrew, M10 X 20mm Long; Use With Single Piece Casing. To Gearbox Number 445/143/831 Or 445/144/455, Screw, M10 X 20mm Long1
13***3ZBolt, M8 X 551
13***3ZNut, Self Lock, M81
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C3-4-3 Worklights, Cab, Canopy
13***5DSetscrew, M10 X 201
13***3DNut, Self Lock M101
14***3ZWasher2
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C3-4-1 Work Light, Option
13***3ZScrew, M6x162
13***3ZScrew, M8 X 162
13***3ZBolt, M10 X 161
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C3-1-1 Air Conditioning, 31.12.07
12***03Tie, Cable, L=300mm X W=7.6mm4
13***7DScrew, M6 X 25mm2
13***3DSetscrew, M8 X 16mm2
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C3-1-5 Panel Rear, Airconditioner, 31.12.07
13***5DSetscrew, M6 X 20mm Long10
13***3DNut, M6 Lock2
14***95Vent, Elbow2
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C3-2-3 Cab, Heater
12***03Tie, Cable, L=300mm X W=7.6mm4
13***1ZSetscrew, M6 X 12mm Long4
13***9ZCapscrew, M6 X 351
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C3-1-6 Compressor, Aircon 31.12.07, 8056
13***7DSetscrew, M8x254
13***9DSetscrew, M8x351
13***1DSetscrew, M8x451
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C3-1-16 Compressor, Assembly, 01.01.08
13***7DSetscrew, M8x254
13***8DSetscrew, M8 X 30mm1
13***9DSetscrew, M8x351
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C3-3-1 Motor, Wiper
14***9ZWasher1
23***14Washer, Wiper1
23***10Cap1
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C3-2-5 Heater Unit Details
15***01Motor, 12 Volt1
30***70Heater, Motor, Assembly1
30***76Tie, Cable1
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D Controls-Machine, Engine
D1-8-4 Pedal, Auxiliary Option
13***8DBolt, M6 X 302
13***7DSetscrew, M8x254
13***8DBolt, M8 X 80mm1
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D1-1-3 Track Levers, Pedals
13***7DSetscrew, M8x252
13***8DSetscrew, M8 X 30mm2
13***9DSetscrew, M8x356
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D1-2-1 Lever, Dozer
12***59Ring, Tolerance1
13***9ZSetscrew, M8x353
13***7ZBolt, M10x251
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D1-7-1 Slew Lock
12***91Washer, Nylon1
21***09Pin, Split, Pin, Split; 1 Off Per Chain - Not Illustrated. Fitted To Chain Bolt Ends - Not Supplied With Chains1
23***11Washer, Star2
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D1-1-1 Control, Throttle
12***02Knob, Controls, Yellow1
13***3ZScrew, M6x162
13***1ZNut, M84
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D2-1-2 Control, Throttle
12***02Knob, Controls, Yellow1
13***0ZBolt, M6 X 40mm Long2
13***5ZScrew, Hexagon M8 X 20mm Long3
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D2-1-3 Control,Throttle
13***5DSetscrew, M8x203
13***7ZBolt, M10x252
14***8ZWasher, Plain M10; San 23620 Ref Dave Bickerton Confirms Identic, Al To 33***8z Rationalise Parts2
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E Hydraulics & Air
E1-10-1 Pump, Service Kit
13***2DCapscrew, M10x504
16***51Adaptor, 1/4"Bsp X 9/16"Sae1
33***17Manifold, Pump Block1
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E1-8-2 Circuit Auxiliary, Single To Double, Acting
13***5DSetscrew, M10 X 202
14***8DWasher, M102
16***59Adaptor, 3/4", Includes O-Ring 17***051
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E1-1-2 Circuit, Controls, Hoses
12***03Tie, Cable, L=300mm X W=7.6mm1
13***5DSetscrew, M8x201
13***5DSetscrew, M10 X 204
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E1-1-4 Pilot Hydraulic, Circuit
13***6DBolt, M8x702
13***3DNut, Self Lock M82
14***7DWasher, M8 Plain2
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E1-8-3 Auxiliary Circuit, Dig End
13***0DSetscrew, M10 X 40mm6
14***8DWasher, M106
33***55Pipe, Auxiliary Lh1
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E1-1-3 Hydraulic Circuit, Schematic
20***21Motor, Slew, With Brake & Timer1
20***64Motor, Track 8062
23***49Block, 8 Valve1
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E1-1-1 Hydraulics, Dig End, 8056
13***1DScrew, M10x121
13***0DSetscrew, M10 X 40mm2
14***8DWasher, M103
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E2-2-1 Pump, Coupling
E2-3-1 Motor, Slew, Assembly
20***94Bearing, Tapered Roller1
20***95Snap Ring1
20***96Needle Bearing1
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E2-4-0 Track Motor
20***64Motor, Track 8061
20***74Kit, Control Piston2
20***76Valve, Pilot1
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E2-1-2 Pump, Main Assembly
12***92Collar, Anti-Vibration1
13***8DSetscrew, M12 X 304
13***0DSetscrew, M16 X 40mm2
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E2-3-4 Motor, Slew
20***21Motor, Slew, With Brake & Timer1
KH***44Elbow; , Serial Range: -`0, Adapter, Elbow, Elbow1
KH***42Adapter, Elbow, 3/8 X 3/81
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E2-4-1 Hydraulic Motor
20***44Screw8
20***11Motor1
20***15Shaft, Motor1
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E3-1-6 Valve Segment, Dipper
25***32Valve, Dipper Section1
25***82Valve, Pressure Relief H, Requires Setting2
25***91Kit-Seal, Secondary Valves2
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E3-9-2 Joystick, Servo, L/H
13***3ZNut, Self Lock, M64
14***11Seal, Bonded6
14***6ZWasher, M64
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E3-2-1 Coupling, Rotary
13***3DBolt, M12 X 55mm4
13***1DNut, M124
16***53Adaptor; O Ring 24***064
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E3-1-3 Valve Segment, Auxiliary
25***29Valve, Auxiliary 2 Section1
25***83Kit-Plug Q2
25***91Kit-Seal, Secondary Valves2
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E3-9-4 Joystick, R/H
13***3ZNut, Self Lock, M64
14***6ZWasher, M64
16***51Adaptor, 1/4"Bsp X 9/16"Sae6
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E3-2-2 Coupling, Rotary
33***24Core, Rotary Joint1
33***25Shell, Rotary Joint1
33***26End Plate1
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E3-1-11 Valve Segment, Outlet
16***51Adaptor, 1/4"Bsp X 9/16"Sae1
25***38Valve, Section, Bucket1
25***99Kit-Seal, Section Interface1
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E3-8-5 Manifold, Block
13***4DBolt2
13***3DNut, Self Lock M82
14***7DWasher, M8 Plain4
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E3-8-6 Valve, Pressure Maintaining
16***51Adaptor, 1/4"Bsp X 9/16"Sae4
25***02Kit-Seal1
25***33Kit, Seal1
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E3-1-5 Valve Segment, Bucket
25***31Valve, Bucket Section1
25***82Valve, Pressure Relief H, Requires Setting2
25***91Kit-Seal, Secondary Valves2
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E3-1-9 Valve Segment, Track R/H
25***36Valve, R/H Track Section1
25***99Kit-Seal, Section Interface1
25***02Plug1
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E3-1-1 Valve Assy., 8 Spool
13***9DBolt, M10 X 35mm Long3
13***3DNut, Self Lock M103
16***51Adaptor, 1/4"Bsp X 9/16"Sae10
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E3-1-8 Valve Segment, Slew
25***34Valve, Slew Section2
25***83Kit-Plug Q2
25***91Kit-Seal, Secondary Valves2
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E3-1-10 Valve Segment, Track L/H
25***37Valve, L/H Track Section1
25***99Kit-Seal, Section Interface1
25***02Plug1
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E3-15-1 Accumulator
16***51Adaptor, 1/4"Bsp X 9/16"Sae1
23***12Bracket, Mounting1
32***55Accumulator, 35cc1
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E3-1-2 Valve Segment, Inlet
25***73Valve, Ls Pressure Relief; San 20565.25/22***73 Same As 25/22***80., P Gamble 22/06***041
25***74Valve, Flow Regulator1
25***94Kit-Seal, Flow Regulator; San 20068.Same As 99***20.P Gamble 21/07/04, Ref P Bratt/Rexroth1
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E3-1-7 Valve Segment, Dozer
25***33Valve, Dozer Section2
25***82Valve, Pressure Relief H, Requires Setting2
25***91Kit-Seal, Secondary Valves3
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E3-11-1 Filter, Hydraulic
32***00Filter, Hydraulic1
32***00Element, Filter 10 Micron1
32***01Element, Flushing1
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E3-9-1 Joystick, Servo, R/H
13***3ZNut, Self Lock, M64
14***11Seal, Bonded6
14***6ZWasher, M64
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E3-1-4 Valve Segment, Boom
25***30Valve, Boom Section2
25***82Valve, Pressure Relief H, Requires Setting2
25***91Kit-Seal, Secondary Valves2
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E3-9-3 Joystick, L/H
13***3ZNut, Self Lock, M64
14***6ZWasher, M64
16***51Adaptor, 1/4"Bsp X 9/16"Sae6
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E4-1-3 Ram, Dipper
14***01Nipple, Grease, Straight, 1/8 Bsp2
22***30Circlip1
55***66Probe, Damping1
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E4-1-4 Ram, Bucket
14***01Nipple, Grease, Straight, 1/8 Bsp1
14***01Nipple, Grease, 90deg. Angle1
23***06O Ring, 60 X 5.01
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E4-1-1 Ram, Dozer
14***01Nipple, Grease, Straight, 1/8 Bsp1
15***22Spacer1
24***39Seal, Piston1
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E4-1-2 Ram, Boom
14***01Nipple, Grease, Straight, 1/8 Bsp2
55***42Seal, Anti Extrusion Ring1
56***47Ram, Boom, 110x601
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E4-1-5 Protection Plates, Boom Ram
F Track/Slew Gearbox
F4-1-1 Slew Gearbox
20***26Shaft, Pinion1
20***27Collar1
20***28Plate1
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J Track & Running Gear, Undercarriage
J1-5-1 Idler Wheel, Recoil Unit
13***4ZBolt4
23***00Wheel, Idler, Steel Chain2
23***00Wheel, Idler, Rubber Chain2
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J1-1-2 Roller, Track Top
23***00Roller, Assembly, Top1
23***01Roller, Shell1
23***02Bearing2
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J1-7-1 Track Assemblies
13***7ZBolt12
14***9ZWasher18
23***01Guide, Rh1
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J1-1-3 Roller, Track Bottom
13***9ZScrew, Set, (Bolt M16 X 35)2
23***00Roller, Track Assembly1
23***03Plug1
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J1-1-1 Undercarriage
13***8DSetscrew, M10 X 3016
13***0DSetscrew, M16 X 40mm4
13***1ZBolt, M12 X 454
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P Engine - 4jg1-Pbw01
P1-5-1 Fans, Pulleys, & Fan Belt
02***44Bolt1
02***08Washer, Crankshaft1
02***86Belt, Fan, L=1150mm1
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P1-8-1 Engine Mounts
02***14Bolt, Flange Head, M10 X 25mm3
02***23Bracket, Engine Mounting, Left Hand1
02***92Bracket, Engine Mounting1
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P1-3-1 Block, Assembly
02***19Plug, Water Drain, Pt 1/42
02***56Bush, Camshaft, Front1
02***57Bush, Camshaft, Centre/Rear1
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P1-7-1 Flywheel & Housing
02***63Housing, Flywheel1
02***65Gear, Flywheel Ring1
02***66Bolt8
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P1-5-2 Fans, Pulleys, & Fan Belt
02***44Bolt1
02***08Washer, Crankshaft1
02***90Pulley, Crankshaft1
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P1-1-1 Engine, Complete
P1-5-3 Fans, Pulleys, & Fan Belt, All Climates Eu
02***44Bolt1
02***08Washer, Crankshaft1
02***86Belt, Fan, L=1150mm1
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P1-6-1 Timing Case
02***49O Ring, T/Cover To T/Case1
02***50Gasket, T/Case To Block1
02***51Seal, Front Oil1
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P1-4-1 Crankshaft, Bearings, Pistons, Con-Rods
02***38Gear, Crankshaft1
02***86Kit-Thrust Washer2
02***90Crankshaft1
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P1-6-2 Camshaft, & Gears
02***55Gear, Camshaft1
02***56Gear, Idler 'A'1
02***58Gear, Idler 'B'1
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P2-2-1 Rocker Assembly, Inlet/Exhaust Valves, Push Rods & Tappets
02***71Seal, Valve Stem8
02***73Valve, Inlet4
02***75Spring, Valve8
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P2-1-1 Cylinder Head
02***72Guide, Valve, Inlet & Exhaust8
02***75Gasket, Cylinder Head, T=1.60mm 1-Hole1
02***76Gasket, Cylinder Head, T=1.65mm 2 Hole1
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P2-4-1 Lifting Plates, Engine
02***96Bolt1
02***72Bracket, Engine Lifting, Front1
02***73Bolt, Flange Head, M10 X 30mm1
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P2-3-1 Rocker Cover
02***85Cover, Rocker1
02***86Bush, Rubber3
02***87Clip2
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P3-4-1 Exhaust System
02***51Gasket, Exhaust1
13***3ZScrew, M8 X 161
13***5ZScrew, Hexagon M8 X 20mm Long4
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P3-1-1 Manifold, Induction
01***32Elbow, Induction1
02***34Stud2
02***07Manifold, Induction1
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P3-3-2 Filter, Air
13***8DSetscrew, M8 X 30mm2
14***7DWasher, M8 Plain2
22***12Clip, Jubilee1
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P3-2-1 Manifold, Exhaust
02***50Manifold, Exhaust1
02***51Gasket, Exhaust1
02***23Stud, M8 X 35, L=472
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P3-3-1 Filter, Air
13***8DSetscrew, M8 X 30mm2
14***7DWasher, M8 Plain2
22***12Clip, Jubilee1
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P4-4-2 Radiator, & Hoses, Hot Climate
12***03Tie, Cable, L=300mm X W=7.6mm2
13***3DScrew, M5x162
13***5DSetscrew, M10 X 204
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P4-2-1 Thermostat, Housing, Inlet & Outlet
02***16Gasket1
02***17Gasket2
02***93Bolt, Flange Head, M8 X 202
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P4-3-1 Radiator, Fittings & Mountings
13***5DSetscrew, M6 X 20mm Long8
13***7DSetscrew, M10 X 25mm Long4
13***5DScrew, M12 X 20mm Long1
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P4-5-1 Radiator/Oil Cooler, Anti-Recirculation, Seals China
23***07Seal, Strip, 50 Metre Roll1
23***06Kit, Anti Re-Circ Foam1
23***59Kit, Anti Recirc Seal, China1
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P4-1-1 Pump, Water
02***14Gasket, Pump To Cyl Block1
02***16Bolt Flange Head, M8 X 55mm5
02***24Pump, Water1
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P4-4-3 Radiator, & Hoses
12***03Tie, Cable, L=300mm X W=7.6mm2
13***3DScrew, M5x162
13***8DSetscrew, M10 X 305
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P5-2-1 Pump, Oil
02***76Kit-Repair, Oil Pump1
02***77Strainer, Suction, Assembly1
02***79Strainer, Gauze1
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P5-6-1 Pipes, Oil
02***86Pipe, Oil Pump Feed1
02***88Pipe, Gear Oil Feed1
02***91Bolt, Banjo1
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P5-1-1 Sump, Oil, & Fittings
02***84Bolt, Flange Head, M10 X 404
02***43Dipstick, Assembly1
02***65Gasket, Oil Sump1
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P5-4-1 Filter, Oil
02***76Element, Oil Filter Cartridge1
02***35Nut2
02***44Filter, Oil, Assembly1
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P6-6-1 Filter, Fuel Sediment, With Primer, 30 Micron
32***03Seal, Dust1
32***28Filter, Fuel Sediment/Water1
32***66Element, Fuel Sediment/Water1
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P6-2-1 Fuel System
02***38Clip2
02***41Hose, Injector Leak-Off1
02***48Clamp, Fuel Injector4
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P6-1-4 Pump & Governor, Fuel Injection, Service Parts
11***60Nut2
17***05Holder, Fuel Delivery Valve1
17***06Gasket1
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P6-4-2 Fuel Pipes, Fuel Tank To Filter
13***8DSetscrew, M10 X 307
14***8DWasher, M107
22***01Clip, Jubilee2
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P6-6-2 Filter, Fuel Sediment, 5 Micron
23***93G.A., Fuel Filter Assembly, 8056 China1
32***03Seal, Dust1
32***08Bowl, Assembly1
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P6-1-1 Pump, Fuel Injection, Installation
02***34Bracket, Timer Housing1
17***00Pump, Fuel Injection1
89***70O Ring1
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P6-4-3 Fuel Pipes, Fuel Tank To Filter
13***8DSetscrew, M10 X 303
13***9DSetscrew, M10 X 35mm Long4
14***8DWasher, M107
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P6-3-2 Injectors, Fuel, Service Parts
17***00Injector, Fuel, Assembly1
17***01Holder, Nozzle Assembly1
17***59Nut, Nozzle Retaining1
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P8-2-1 Gasket Set, Overhaul, Top
P8-1-1 Gasket Set, Overhaul
P8-3-1 Kit, Piston & Liner

8056 serial number reference

For JCB 8056 mini excavators, the machine identification plate is typically located on the right-hand side of the canopy frame or cab base. A duplicate serial number is stamped into the upper-frame casting near the boom mount. Verify applicability with a JCB dealer.

PrefixIdentifies
1296000 to 1296999Applicability: JCB 8056 mini excavator service manual coverage. Source: JCB Manual Download service manual listing for model 9803-9296.

Frequently asked questions

What engine does the JCB 8056 use?

The JCB 8056 is powered by a 41 kW (55.78 HP) diesel engine, typically from the EcoMAX or Dieselmax family depending on the specific series and emissions tier.

What is the operating weight of the JCB 8056?

The operating weight varies by configuration, including standard and CTS (Compact Tail Swing) variants, but generally falls within the compact excavator class under 6,000 kg (13,228 lb).

What model replaced the JCB 8056?

The JCB 8056 is part of the 80-series mini excavator lineup, with the 8060 and 8065 models serving as larger successors in the same compact excavator family.

What 8056 owners discuss

What engine generation is associated with big end bearing failures on JCB 444 engines?
Early Dieselmax engines (Tier 2 and early Tier 3) are prone to big end bearing failures on the crankshaft. These failures are often linked to stretched oil change intervals or poor oil quality. Fuel injection pump faults are also common on these earlier mechanical and early electronic engines. Have your dealer verify the engine generation and inspect the crankshaft bearings if symptoms of bottom-end knock are present.
What are the common failure patterns for later JCB 444 engines (Tier 4i and T4 Final EcoMax)?
Later engines tend to suffer from injector faults and general wear. The common rail fuel systems are sensitive to fuel quality, and faulty injectors can cause rough running, white smoke, and poor starting. Worn or faulty injectors can also cause a noticeable loss of performance.
What electrical issue commonly causes intermittent forward movement or no-start conditions in JCB shuttle transmission models?
The forward/reverse lever operates microswitches that activate hydraulic solenoids on the transmission body. A failed forward microswitch or inhibitor switch can cause the machine to rev without moving forward or prevent starting. Verify solenoid energization with a screwdriver blade test and check wiring continuity to the forward solenoid.
What is a typical undercarriage or wear pattern for JCB mini excavators in dusty environments?
In dusty conditions, standard air filtration can be overwhelmed, leading to accelerated piston ring and bore wear. This results in high oil consumption and heavy breathing from the crankcase breather. Fitting a cyclone pre-filter ahead of the standard air filter is recommended to extend filter and engine life.
What hydraulic issue is common on older JCB backhoe models regarding steering?
On older models like the 3CMk2 and Mk3, the orbital steering valve is a common fault point and often leaks. Low hydraulic oil levels can also cause slow or non-functional hydraulics when the rear end is in a hole and the front is higher. Check hydraulic fluid levels and clean the strainer.
What is a critical check when buying a used JCB 8056 regarding its service history?
Verify the machine serial range against the correct service manual, as the JCB 8056 service manual covers model 9803-9296 and serial numbers from OEM part reference to OEM part reference. Ensure the engine generation matches the expected Tier specification for the serial range to identify correct failure modes (e.g., Dieselmax vs. EcoMax).
What coolant maintenance issue is specific to JCB engines?
Brown sludge in the expansion bottle indicates silicate separation. Engine coolant must be changed at recommended service intervals to prevent corrosion. Use JCB-approved coolant to ensure proper corrosion protection.

Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.

Serial-range & configuration variants

This page covers the Jcb 8056. Related factory variants of the same model family:

8056

Need a specific 8056 part?

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