Jcb 8085(8085 ROW)
JCBconstructionmini crawler excavators

Jcb 8085(8085 ROW)

Maintenance schedule, common problems & OEM parts breakdown

The JCB 8085 ZTS ROW is an 8-tonne zero tailswing mini crawler excavator manufactured from 2010 to 2014. It is powered by a 2.2-litre Dieselmax engine producing 53 hp (39.5 kW) net power. Operating weight ranges from 8,026 kg to 8,600 kg depending on configuration. The machine features a full-size excavator-style cab, side-mounted engine, and rear-mounted valve blocks for service access. Configurations include standard boom, long reach boom, and material handling variants. It succeeded earlier midi excavator lines and preceded the 8087 series.

The 8085 ZTS ROW introduced JCB's EcoMAX/Dieselmax engine technology with extended 500-hour oil intervals, eliminating the need for DEF or DPF systems common in later Tier 4 models. This design reduced downtime and maintenance costs, making it highly sought after in the used market for its reliability and simplicity. The zero tailswing design allowed operation in confined spaces without counterweight overhang, a key differentiator from predecessors. Parts availability remains strong due to the machine's widespread use in municipal and utility applications.

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 8085(8085 ROW) specifications

Engine

ModelJCB Dieselmax
Displacement2.2 L
Cylinders4
Net Power53 hp (39.5 kW)
Emissions TierInterim Tier IV / EU Stage IIIA

Weights

Operating Weight17,694 lb (8,026 kg)

Dimensions

Track Gauge17.72 in (450 mm)
Sprocket Idler Centers7 ft 90 in (2,280 mm)
Track Length on Ground7 ft 87 in (2,200 mm)

Performance

Dig Depth13.85 ft (4.22 m)
Max Reach Horizontal22.41 ft (6.83 m)
Tearout Force8,093 lbf (36 kN)

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

Jcb 8085(8085 ROW) maintenance schedule

Service intervalTasks
Every 10 h
  • Check engine oil level via ground-level dipstick.
  • Check hydraulic tank sight gauge.
  • Check coolant expansion tank level.
  • Inspect for fluid leaks under engine bay, axles, and swing pivot.
  • Inspect track tension and roller condition.
  • Verify GET teeth, cutting edge, and pin security.
Every 500 h
  • Change engine oil and filter using JCB Engine Oil Special or 15W-40 API spec.
  • Replace primary and secondary fuel filters.
  • Inspect hydraulic return filter magnet for metallic debris.
  • Take oil samples from engine, hydraulic, and axle systems.
  • Check air filter restriction indicator and clean or replace.
  • Grease all boom, arm, bucket, and kingpost pivot points.
Every 1,000 h
  • Drain, flush, and refill cooling system with JCB-spec long-life coolant.
  • Change transmission oil and filter (if equipped with torque converter).
  • Change front and rear axle oil and inspect hubs.
  • Run full ECM diagnostic scan via JCB ServiceMaster tool.
  • Torque check slew ring bolts on JS-series excavators.
  • Measure undercarriage wear against JCB limits.
Every 2,000 h
  • Drain hydraulic tank, clean tank, and refill with JCB-spec hydraulic oil.
  • Inspect boom, arm, loader arm, and chassis for structural cracks.
  • Measure swing ring play using dial indicators.
  • Inspect brake disc wear and immersed brake condition.
  • Check injector spray patterns via diagnostic tool.
  • Service cab HVAC system including cabin filter replacement.

Servicing the 8085(8085 ROW) beyond the schedule

Predictive Maintenance & Fluid Analysis

Baseline fluid analysis at the 500-hour interval is critical for the 8085 ZTS ROW. Take samples from the engine, hydraulic system, and axle housings to detect early wear. The Dieselmax engine's extended oil interval means contaminants accumulate faster between changes; monitor soot and fuel dilution levels closely. Hydraulic oil samples should be checked for ISO cleanliness codes to protect the common-rail injectors. Use JCB-spec long-life coolant at the 1000-hour service to prevent corrosion in the aluminum heat exchangers. Track undercarriage wear measurements at 1000 hours to predict replacement needs before failure.

Corrective & Common Repairs

Common issues on the 8085 ZTS ROW include hydraulic pump seal leaks and fuel filter housing gasket failures. Inspect the fuel filter sedimenter daily and replace the primary filter at 500 hours to protect the high-pressure injection system. Check the slew ring bolts for torque loss during the 1000-hour service; loose bolts can damage the slewing bearing race. Inspect the hydraulic return filter magnet for fine metallic debris indicating pump wear. Replace the air filter element when the restriction indicator shows red. Ensure the track tension is adjusted correctly to prevent premature roller and idler wear.

Overhaul & Rebuild Points

The 2000-hour service is the primary overhaul milestone for the 8085 ZTS ROW. Drain and clean the hydraulic tank thoroughly to remove sludge and water contamination.

Seasonal & Environment Servicing

In cold climates, ensure the coolant mixture is rated for the lowest expected temperature to prevent block cracking. Check the battery electrolyte level on non-sealed units and clean terminals. In dusty environments, inspect the air filter restriction indicator more frequently and clean the radiator cooler fins to prevent overheating. Verify the operation of the cab HVAC system before summer to maintain operator comfort. Inspect the track shoes for wear that could reduce traction on slippery surfaces. Ensure the backup alarm and lights are functional for safe operation in low-visibility conditions.

8085(8085 ROW) common service parts

Part numberPart
32/925827Element, Fuel Filter, CartridgeCheck fitment →
32/926116Filter, Fuel, AssemblyCheck fitment →
32/926117Filter, Fuel Sediment, AssemblyCheck fitment →
9099063251BoltCheck fitment →
580/12166Filter, Air, AssemblyCheck fitment →

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

8085(8085 ROW) fault codes & troubleshooting

CodeMeaningLikely causeWhat to do
115Horn open circuit errorBroken wiring, blown fuse, or faulty horn unitInspect horn wiring continuity and fuse integrity
215Horn short circuit errorWiring insulation damage causing ground fault or shorted hornCheck wiring harness for shorts to ground and test horn resistance
227Fuel rail pressure too lowFuel supply restriction, failing lift pump, or pressure sensor faultCheck fuel filter condition and fuel line integrity
22Intake air temperature sensor malfunction (low voltage)Sensor ground fault, short circuit, or connector corrosionInspect sensor wiring and connector pins for damage
237Travel alarm output short circuitedFaulty travel alarm buzzer or shorted wiring in the alarm circuitDisconnect alarm buzzer to isolate circuit and check for shorts
1XXGeneral open circuit errorBroken wire, loose connection, or failed component in sensor/solenoid circuitTrace specific circuit using wiring diagram and check continuity
2XXGeneral short circuit errorWiring short to ground or internal component shortInspect wiring harness for chafing or pinching near moving parts
3XXGeneral system errorECU communication fault, calibration drift, or internal module failureRun diagnostic scan with JCB ServiceMaster to identify specific subsystem

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

8085(8085 ROW) attachments & work tools

Digging Buckets

Standard and deep-dig configurations are available for the 8085 ZTS, with typical widths ranging from 30 to 48 inches (762 to 1219 mm) depending on the specific bucket profile. These buckets utilize a standard JCB quick hitch mounting system compatible with the machine's boom geometry.

Grading and Ditching Buckets

Grading and ditching buckets are offered to complement the digging envelope, with widths varying by configuration to match the 8085 ZTS class. These tools are designed for utility work and require the standard auxiliary hydraulic circuit for tilt functions.

Tilt Rotators

The 8085 ZTS supports tilt rotator attachments for enhanced precision in tight access areas. These units require double-acting auxiliary pipework, which is available as an optional upgrade from the standard single-acting breaker circuit.

Hydraulic Breakers

Breaker attachments are supported by standard single-acting auxiliary pipework. Optional double-acting pipework can be specified for tools requiring continuous hydraulic flow, such as certain hammer models or high-flow attachments.

Quick Hitches and Couplers

Both manual and hydraulic quick hitch options are available for the 8085 ZTS. Hydraulic quick hitches allow for rapid tool changes from the operator's seat, while manual options provide a cost-effective alternative for static work sites.

Specialty Attachments

Optional grapple changeover valves are available on the auxiliary high-flow circuit for hanging grapples or similar tools. Hydraulic pallet forks and land clearance rakes are also compatible with the machine's auxiliary hydraulic system.

All 8085(8085 ROW) assemblies by section

Every catalogued assembly group for the Jcb 8085(8085 ROW). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

B Bodywork
B3-0-11 Undercarriage
13***8DSetscrew, M12 X 3012
13***6DBolt, M12 X 7040
13***1DBolt, M16 X 45mm23
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C Electrics
C3-12-11 Alternator, Assembly, 12v 80a
13***1DScrew, M10 X 1101
13***4DBolt, M10x1401
13***3DNut, Self Lock M102
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C8-0-11 Engine Electrical Control Parts
02***84Lead, Starter Earth1
02***62Bolt, M12x352
02***70Nut, M81
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K Engine Isuzu 4le2xysj01 Tier 3
K0-0-11 Power Unit Assembly
12***02Plate, Compression4
12***97Fan, & Viscous Coupling, Assembly1
13***1DScrew, Set M6x123
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K2-0-11 Gasket Sets, Engine, Overhaul
K3-0-11 Oil Pump & Oil Strainer
02***38O Ring1
02***18Bolt, M8x161
02***91Gasket1
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K4-90-11 Oil, Pan, & Level Guage
02***57Plug, Drain, M24x171
02***92Gasket, .1
02***96Nut, M64
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K4-40-11 Oil Cooler & Oil Filter
02***38O Ring1
02***72Gasket, Air Breather1
02***53Gasket, .1
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K4-0-11 Cylinder Block, Assembly
02***19Plug, Water Drain, Pt 1/41
02***21Pin, 11odx84
02***79Plug, O/D = 22mm1
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K5-0-11 Cylinder Head, Assembly
02***79Plug, O/D = 22mm6
02***69Plug Core, O/D = 45mm1
02***18Bolt, M8x162
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K5-50-11 Manifold, Induction
02***05Bolt, M5x202
02***52Valve1
02***93Stud, M6x162
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K5-10-11 Cover, Cylinder Head
02***99Seal1
02***18Stud, M6x202
02***49Bolt, M6 X 207
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K5-40-11 Manifold, Exhaust
02***46Nut, M88
02***18Gasket, .1
02***21Manifold, Exhaust1
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K5-40-21 Egr Emission Piping
02***62Gasket2
02***63Gasket1
02***43Nut, M84
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K6-0-11 Camshaft, Rocker & Valves
02***19Bolt, Oil Level Switch, M6x255
02***27Collet, Split16
02***55Bolt, M6 X 505
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K7-0-11 Crankshaft, Piston & Flywheel
02***01Key, Woodruff1
02***05Pin, .4
02***29Bolt, M12x326
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K8-70-21 Timing Chain Case
02***19Nut, M61
02***49Bolt, M6 X 203
02***33Nut, M82
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K8-70-11 Timing Gear Case & Flywheel Housing
02***99Seal1
02***26Bolt, M10x256
02***88Nut, Cover, M82
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L Engine Ancillaries
L2-0-11 Induction Assembly
13***8DSetscrew, M8 X 30mm2
13***1DNut, M82
14***7DWasher, M8 Plain4
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L3-0-11 Fuel Injection System
02***45Washer, Seal4
02***81Kit-Filter1
02***95Collar2
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L3-60-11 Main & Sedimentor Fuel Filters
02***27Cover, .1
02***33Joint, .1
02***35Gasket, .1
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L4-60-11 Water Piping, Engine
02***52Clip, Hose10
02***45Clip, Jubilee, Id=452
02***18Bolt, M8x162
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L4-90-21 Pulley Fan
01***05Pulley, Fan Drive, 118 Od 1 Groove1
02***20Bolt, M6x122
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L4-90-11 Fan, Assembly, Viscous
12***97Fan, & Viscous Coupling, Assembly1
13***3ZNut, Self Lock, M84
14***7ZWasher4
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L4-50-11 Thermostat & Housing
02***58Gasket1
02***52Clip, Hose3
02***68Thermostat1
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L5-0-11 Water Pump
02***11Bolt, M8 X 501
02***74Stud, M8x711
02***88Nut, Cover, M82
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L6-20-11 Turbo & Oil Pump Piping
02***35Bolt, Banjo1
02***51Gasket, .2
02***80Pipe, Oil Pump To Cylinder Block1
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L6-0-11 Turbocharger
02***62Gasket1
02***07Bolt, Sensor, M6x164
02***46Nut, M87
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L7-0-21 Exhaust , Manifold, Pipe
33***80Bellows, Flexible Exhaust1
33***94Pipe, Silencer To Bellows1
33***73Pipe, Bellows To Turbo1
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L7-0-11 Exhaust System
13***3DSetscrew2
13***7DSetscrew, M12 X 252
13***3DNut, Self Lock M83
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Z Top Level Structures
Z3-0-11 Main Build, 8085
23***13Cover, Digging, Assembly0
23***66Label, Tops/Fogs0
23***29Lubricant, Assembly1
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8085(8085 ROW) serial number reference

Locate the machine identification plate riveted to the right-hand side of the kingpost. The plate displays the Product Identification Number (PIN) with the machine serial number (8 digits) in the fourth field. Verify applicability with a JCB dealer if the plate is missing or unreadable.

PrefixIdentifies
01071500JCB 8085 ZTS ROW (Mini Excavator). Applicability: Start of production for this specific generation/configuration. Source: JCB Service Manual the OEM part reference-2 and Parts Manual Catalog for 8085 ZTS ROW.
01071500-01073122JCB 8085 ZTS ROW (Mini Excavator). Applicability: Serial range covered by Parts Manual Catalog the OEM part reference for years 2009-2013. Source: RepairsAdvisor Parts Manual Catalog listing.
01073000-01073203JCB 8085 ZTS ROW (Mini Excavator). Applicability: Serial range covered by Parts Manual Catalog the OEM part reference for year 2013. Source: RepairsAdvisor Parts Manual Catalog listing.
02336424-02336574JCB 8085 ZTS ROW (Mini Excavator). Applicability: Serial range covered by Parts Manual Catalog 9822 0140 for year 2013. Source: RepairsAdvisor Parts Manual Catalog listing.

Frequently asked questions

What engine does the JCB 8085 ZTS ROW use?

The JCB 8085 ZTS ROW uses a 2.2-litre Dieselmax engine producing 53 hp (39.5 kW) net power.

What is the operating weight of the JCB 8085 ZTS ROW?

Operating weight ranges from 8,026 kg to 8,600 kg depending on configuration and attachments.

What model replaced the JCB 8085 ZTS ROW?

The JCB 8087 series succeeded the 8085 ZTS ROW in JCB's mini excavator lineup.

What 8085(8085 ROW) owners discuss

What engine powers the JCB 8085 ZTS, and what are common fuel system quirks reported by owners?
The JCB 8085 ZTS is powered by a 2.2-litre turbo-charged and intercooled Isuzu 4LE2 engine. Owners report that the engine is sensitive to fuel quality; dirty fuel can cause blue smoke and power loss. A common issue involves the fuel injection pumps, where original units may fail or require precise shim adjustments to set timing. If injectors are refurbished incorrectly or fitted with wrong nozzles, the machine may produce black smoke under load despite good compression. Turbocharger carbon buildup from past oil leaks can also cause impeller tightness and reduced boost pressure (typically around 8-9 psi, with manual specs approx. 10 psi). Have your dealer verify turbo and pump specifications.
What hydraulic behaviors and control issues are typical for the JCB 8085?
The machine uses a variable displacement (VD) hydraulic pump. A known issue is the pump losing demand, causing hydraulics to enter limp mode and hand controls to become hard or cut out. This often resolves after a few minutes of cooling, suggesting an electrical or sensor-related fault rather than pure mechanical failure. Another reported quirk involves the LS (load sensing) line; rubber crumbs can accumulate in a minute orifice (0.6 mm) controlling the pump upstroke, leading to erratic performance.
What undercarriage and wear patterns are associated with the JCB 8085 ZTS?
The JCB 8085 ZTS is an 8-tonne zero tailswing mini excavator with an operating weight of approximately 8,026 kg (17,694 lb). The undercarriage features a track length on ground of 2,200 mm (7 ft 3 in) and sprocket-to-idler centers of 2,280 mm (7 ft 6 in). Owners note that while the design addressed faults of the predecessor 8080, component positioning changes can create new access issues. The machine is prone to overheating the radiator specifically when tracking over distances in warm weather, rather than during active digging work. Have your dealer verify track tension and idler wear.
What are common electrical or sensor issues reported for this model?
Owners frequently attribute hydraulic limp mode and hard controls to electrical faults, with JCB technicians sometimes unable to detect the root cause. The machine is equipped with an AMS (At-a-Glance Monitor) that provides operational status and diagnostic information. Issues may stem from the solenoid operation of the EGR valve or incorrect parameters in the engine control system. Smoke testing intake pipework is recommended to rule out boost leaks that mimic electrical or pump failures.
What fluids and lubricants are specified for the JCB 8085 ZTS?
The engine holds 4.5 L of engine oil. The cooling system requires 3.5 L of coolant. The hydraulic system holds 17 L of hydraulic oil, specified as ISO 46. The fuel tank capacity is 5.0 L. JCB recommends using verified JCB branded fluids or equivalent alternatives that meet their specifications for engine oil, hydraulic fluid, and coolant. Use of standard 10w40 engine oil is noted by owners as acceptable in some contexts, but ISO 46 hydraulic oil is required for the system.
What are the key serial number and model identification details for the JCB 8085 ZTS?
The JCB 8085 ZTS was manufactured from 2010 to 2014. The specific ROW (Right of Way) mini crawler excavator parts manual covers serial numbers the OEM part reference to the OEM part reference. The machine PIN follows a 17-character format where the 10th character encodes the manufacturing year. The engine serial number is distinct from the machine PIN and is located on a plate on the engine block. Different engine variants may require different parts even for machines built in the same year.
What should be checked when buying a used JCB 8085 ZTS?
Check the turbocharger impeller for tightness or carbon buildup, which indicates past oil leaks. Verify the condition of the LS line orifice for debris. Inspect the fuel injection pumps and ensure shims are correctly measured and installed for timing. Check for radiator overheating during tracking in warm conditions. Verify the AMS diagnostic system for stored error codes. Ensure the engine compression is within spec (approx. 400-401 psi). Have your dealer verify the engine and hydraulic pump integrity.

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

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