JCBconstructionpowerpacks

Jcb COMPACT I 5087

Maintenance schedule, common problems & OEM parts breakdown

The JCB Compact I 5087 is a mini excavator within the JCB Compact series, designed for utility and landscaping applications in size-restricted jobsites. The machine features a heavy-duty, fully welded H-frame undercarriage and a low center of gravity for stability. Power is delivered by a JCB Diesel by Kohler engine, which operates without a Diesel Particulate Filter (DPF) or Diesel Exhaust Fluid (DEF), eliminating regeneration downtime. Operating weight ranges approximately 4.8 to 5.0 metric tonnes depending on configuration. The Compact series includes zero tailswing (ZTS) and conventional tailswing variants, with the 50Z-I being a contemporary reference model for this class. Production of the Compact series spans the 2010s through the 2020s, serving as a core offering in JCB's mini excavator lineup alongside the 18Z, 35Z, and 55Z models.

The Compact series evolved to prioritize serviceability and extended maintenance intervals, notably extending engine oil changes to 500 hours compared to the 250-hour intervals common on competing brands. This design choice reduces operational downtime and appeals to rental fleets and contractors. In the used and parts market, the machine remains relevant due to its robust H-frame construction and accessible ground-level service points. The absence of DEF systems simplifies long-term ownership costs. The 5087 designation aligns with the 5-tonne class, sharing structural and hydraulic components with the 50Z-I and 55Z-I models, ensuring parts availability and mechanical familiarity across the zero tailswing range.

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 COMPACT I 5087 specifications

Engine

Engine ModelKohler KDI 2504 TCR
Gross Power64.4 hp (48.0 kW)
Emissions TierEPA Tier 4 Final / Stage V

Weights

Operating Weight19,180 lb (8,700 kg)
Ground Pressure5.5 psi (38 kPa)

Dimensions

Transport Length253.3 in (6.43 m)
Transport Width90.6 in (2.30 m)
Transport Height106.5 in (2.71 m)
Overall Width90.6 in (2.30 m)

Performance

Maximum Digging Depth172.0 in (4.37 m)
Maximum Reach at Ground Level290.8 in (7.39 m)
Maximum Dumping Height212.0 in (5.38 m)
Bucket Breakout Force12,838 lbf (57.1 kN)
Stick Digging Force9,060 lbf (40.3 kN)

Service capacities (summary)

Fuel Tank Capacity29.6 gal (112 L)
Auxiliary Circuit Flow26.4 gal/min (100 L/min)

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

Jcb COMPACT I 5087 maintenance schedule

Service intervalTasks
Every 10 h
  • Check engine oil, hydraulic tank, and coolant levels.
  • Inspect for fluid leaks around engine bay, axles, and swing pivot.
  • Verify track tension and roller condition.
  • Inspect hoses, cylinders, and fittings for chafing or weeping.
  • Check GET, bucket pins, and quick-hitch keepers.
  • Test cab safety items including seat belt, mirrors, and alarms.
Every 500 h
  • Replace engine oil and filter using JCB Engine Oil Special or equivalent 15W-40.
  • Replace primary and secondary fuel filters.
  • Inspect hydraulic return filter magnet for metallic debris.
  • Take oil samples from engine, hydraulic, axle, and final drive systems.
  • Replace or clean air filter primary element.
  • Grease all pivot points on boom, arm, bucket, and kingpost.
Every 1,000 h
  • Drain, flush, and refill cooling system with JCB-spec long-life coolant.
  • Replace transmission oil and filter on applicable models.
  • Replace front and rear axle oil including hubs.
  • Perform full ECM diagnostic scan via JCB ServiceMaster tool.
  • Interpret hydraulic oil samples against 500-hour baseline.
  • Check turbocharger shaft play, boot condition, and wastegate function.
Every 2,000 h
  • Drain hydraulic tank, clean tank, and refill with JCB-spec hydraulic oil.
  • Inspect boom, arm, loader arm, chassis, and side frames for structural cracks.
  • Measure swing ring radial and axial play using dial indicator.
  • Inspect brake disc wear and immersed brake condition.
  • Check injector spray patterns via diagnostic tool and replace as required.
  • Service cab HVAC including A/C pressure and cabin filter.

Servicing the COMPACT I 5087 beyond the schedule

Predictive Maintenance & Fluid Analysis

At the 500-hour interval, collect oil samples from the engine, hydraulic tank, axle, and final drive to establish a baseline. Compare subsequent samples against this baseline to detect bearing wear or contamination early. Inspect the hydraulic return filter magnet for metallic debris before disposal. Monitor the air filter restriction indicator and clean or replace the primary element as needed. Use JCB Engine Oil Special or equivalent 15W-40 diesel oil meeting API specifications. Verify hydraulic fluid levels via the sight gauge during daily checks to prevent pump cavitation.

Corrective & Common Repairs

Address fuel system issues promptly by replacing primary and secondary fuel filters at 500 hours to protect common-rail injectors. Check the turbocharger shaft play and charge cooler boot condition during the 1000-hour service. Inspect the slew ring bolts for torque compliance on JS-series and compact excavators to ensure structural integrity. Replace worn GET components, including bucket teeth and cutting edges, to maintain digging efficiency. Verify track tension to prevent excessive wear on rollers and idlers, which are sealed for life and not user-lubricated.

Overhaul & Rebuild Points

The 2000-hour service requires draining the hydraulic tank and cleaning it internally before refilling with JCB-spec hydraulic oil. Measure swing ring radial and axial play using a dial indicator to determine if the slew bearing requires replacement. Inspect the boom, arm, and chassis for unauthorized welding or structural cracks. Check brake disc wear and immersed brake condition on applicable models. Replace injector spray patterns via diagnostic tool if performance degrades. Service the cab HVAC system, including A/C pressure and evaporator condition, to maintain operator comfort.

Seasonal & Environment Servicing

In temperatures below -18°C, install cold weather starting aids such as fuel and oil heaters and extra batteries. Use low-temperature diesel fuel to prevent gelling. Verify glow plug operation during cold starts to reduce black smoke from unburned fuel. Inspect the hydraulic system for hose chafing and cylinder rod scoring, which can be exacerbated by cold starts and heavy loads. Ensure the coolant expansion tank is filled with JCB-spec long-life coolant to prevent freezing. Check track tension regularly as temperature changes can affect rubber track elasticity and sag.

COMPACT I 5087 common service parts

Part numberPart
929/12004Element, SuctionCheck fitment →
A2/1817Gasket, FilterCheck fitment →
PP/1775Element, FilterCheck fitment →
PP/1722FilterCheck fitment →
PP/5135Element, SuctionCheck fitment →

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

COMPACT I 5087 fault codes & troubleshooting

CodeMeaningLikely causeWhat to do
P0087Too low pressure in the fuel line / systemFuel supply restriction, clogged filter, or failing lift pump.Check fuel filter condition and fuel line integrity.
P0088Too high pressure in the fuel line / systemFuel pressure regulator malfunction or restricted return line.Inspect fuel pressure regulator and return lines.
P0115Circuit 1, engine coolant temperature sensorFaulty coolant temperature sensor or wiring issue.Test sensor resistance and check connector pins.
P0116Range / Performance of circuit 1 of the coolant temperature sensorSensor out of calibration range or intermittent signal.Verify sensor readings against known good values.
P0201Injector circuit open – 1st cylinderBroken wire, loose connector, or failed injector solenoid.Inspect injector harness and connector for damage.
P0335Crankshaft Position Sensor "A" CircuitFaulty crank sensor, damaged wiring, or debris on sensor tip.Check sensor gap and wiring continuity.
P0336Torque Reduction Crank Sensor Fault (Signal Fault)Intermittent signal or signal out of range from crank sensor.Monitor live data for signal stability.
P0101MAF Sensor FaultDirty or failed Mass Air Flow sensor.Clean MAF sensor or test for proper operation.
P029BInjector drift fault detection on Injector 2Injector 2 mechanical drift or calibration error.Perform injector balance test or replace injector.
P0321-87CAN bus message error for engine speed from engine ECUCommunication fault between engine ECU and display/control module.Check CAN bus wiring and connections.

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

COMPACT I 5087 attachments & work tools

Buckets

JCB offers a range of buckets for its compact excavator line, including models compatible with the 50Z-I series. Selection must match the machine's operating weight to prevent damage and warranty voidance.

Lifting Equipment

The range includes lifting equipment with capacities from 0.15 to 4 tonnes. These units feature a compact design for improved visibility and utilize a Q-Fit pick-up system for easy attachment.

Specialist Attachments

This category includes fabricated units such as ripper teeth for breaking up frozen earth, concrete, or tarmac. It also encompasses tree spades with a 25-inch cutting angle for operation in confined areas.

Hydraulic Systems

JCB compact excavators feature programmable twin auxiliary lines providing high and optional low hydraulic flows. The system utilizes O-Ring Face Seal (ORFS) fittings for sealing capabilities.

All COMPACT I 5087 assemblies by section

Every catalogued assembly group for the Jcb COMPACT I 5087. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

A Portable Power Packs
A0-1-1 Machine & Engine, Identification
PP***90Engine, Robin Dy35, Diesel1
PP***57Engine, Lombardini, 530 Series1
PP***14Engine, Honda, 10 Hp G400 Qzdf1
See all parts with full part numbers in Heavy Parts AI →
A0-1-2 Machine & Engine, Identification
92***02Engine, Honda, 5.3hp Gx160k 1 Qx1
PP***00Engine, Honda, 5 Hp Gx140 Qx1
See all parts with full part numbers in Heavy Parts AI →
A0-1-4 Machine & Engine, Identification
92***01Engine, Honda, Gx390 Qx1
PP***90Engine, Robin Dy35, Diesel1
PP***16Engine, Robin Dy35, Diesel1
See all parts with full part numbers in Heavy Parts AI →
A0-1-3 Machine & Engine, Identification
92***01Engine, Honda, 8hp Gx2401
92***01Engine, Yanmar (Diesel), L70 Ae-D 7hp1
92***01Engine, Suzuki, V2701
See all parts with full part numbers in Heavy Parts AI →
A1-5-15 Chassis
13***8ZBolt, M10 X 304
13***0ZBolt, M10 X 402
13***2ZBolt, Bolt; Qty Was 1 Off Before New Plate. Old Fasteners Were 13***8z X 2 & 13***2z X 13
See all parts with full part numbers in Heavy Parts AI →
A1-5-11 Chassis
13***0ZBolt0
13***3ZScrew, M6x160
13***9ZBolt, M8 X 35mm0
See all parts with full part numbers in Heavy Parts AI →
A1-5-13 Chassis
13***8ZBolt, M10 X 300
13***0ZBolt, M10 X 400
13***2ZBolt, Bolt; Qty Was 1 Off Before New Plate. Old Fasteners Were 13***8z X 2 & 13***2z X 10
See all parts with full part numbers in Heavy Parts AI →
A1-5-14 Chassis, Conversion Kit, Mk Ii To Mk Iii
13***8ZBolt, M10 X 304
13***0ZBolt, M10 X 404
13***2ZBolt, Bolt; Qty Was 1 Off Before New Plate. Old Fasteners Were 13***8z X 2 & 13***2z X 12
See all parts with full part numbers in Heavy Parts AI →
A1-5-10 Chassis
13***0ZBolt0
13***0ZBolt0
13***9ZBolt, M8 X 35mm0
See all parts with full part numbers in Heavy Parts AI →
A1-5-6 Chassis
13***0ZBolt0
13***2ZBolt0
13***9ZBolt, M8 X 35mm0
See all parts with full part numbers in Heavy Parts AI →
A1-5-9 Chassis
13***5ZScrew, Hexagon M8 X 20mm Long0
13***9ZBolt, M8 X 35mm0
13***9ZBolt, M10 X 350
See all parts with full part numbers in Heavy Parts AI →
A1-5-7 Chassis
13***0ZBolt0
13***2ZBolt0
13***9ZBolt, M8 X 35mm0
See all parts with full part numbers in Heavy Parts AI →
A1-5-4 Chassis & Frame
13***07Bolt0
13***7ZBolt, M10x252
13***8ZBolt, M10 X 302
See all parts with full part numbers in Heavy Parts AI →
A1-5-8 Chassis
13***7ZScrew, Hexagon M8 X 250
13***9ZBolt, M10 X 350
13***7ZBolt0
See all parts with full part numbers in Heavy Parts AI →
A1-5-12 Chassis
13***0ZBolt0
13***0ZBolt0
13***9ZBolt, M8 X 35mm0
See all parts with full part numbers in Heavy Parts AI →
A2-1-2 Pump, Hydraulic, Single
13***03Screw, Grub, M8 X 10mm0
13***08Capscrew4
13***10Capscrew0
See all parts with full part numbers in Heavy Parts AI →
A2-1-9 Pump, Hydraulic
13***4ZScrew, Grub0
13***09Capscrew, M6 X 350
14***18Seal, Bonded, 1/2" Bsp0
See all parts with full part numbers in Heavy Parts AI →
A2-1-5 Pump, Hydraulic, Single
13***4ZScrew, Grub0
13***09Capscrew, M6 X 350
14***18Seal, Bonded, 1/2" Bsp1
See all parts with full part numbers in Heavy Parts AI →
A2-1-8 Pump, Hydraulic
13***4ZScrew, Grub0
13***08Capscrew0
14***18Seal, Bonded, 1/2" Bsp0
See all parts with full part numbers in Heavy Parts AI →
A2-1-10 Pump, Hydraulic, Single
13***04Screw, Grub0
13***09Capscrew, M6 X 350
14***18Seal, Bonded, 1/2" Bsp0
See all parts with full part numbers in Heavy Parts AI →
A2-1-7 Pump, Hydraulic
13***1ZScrew, Grub0
13***08Capscrew0
14***18Seal, Bonded, 1/2" Bsp0
See all parts with full part numbers in Heavy Parts AI →
A2-1-6 Pump, Hydraulic, Single
13***4ZScrew, Grub0
13***09Capscrew, M6 X 350
14***15Washer, Seal; Replaces Khj08910
See all parts with full part numbers in Heavy Parts AI →
A3-1-4 Valve, Control
13***7ZBolt, M10x250
13***05Screw, Cap0
14***15Washer, Seal; Replaces Khj08910
See all parts with full part numbers in Heavy Parts AI →
A3-1-10 Valve, Manual
13***8ZBolt, M8x80mm Long0
14***18Seal, Bonded, 1/2" Bsp0
16***04Adapter, Male/Female0
See all parts with full part numbers in Heavy Parts AI →
A3-1-6 Valve, Control
14***15Washer, Seal; Replaces Khj08910
14***18Seal, Bonded, 1/2" Bsp0
14***6ZWasher, M60
See all parts with full part numbers in Heavy Parts AI →
A3-1-11 Valve Assembly
13***3ZCapscrew0
13***2ZCapscrew, M6 X 500
14***15Washer, Seal; Replaces Khj08910
See all parts with full part numbers in Heavy Parts AI →
A3-1-9 Valve, Relief
13***8ZBolt, M8x80mm Long0
14***18Seal, Bonded, 1/2" Bsp0
16***04Adapter, Male/Female0
See all parts with full part numbers in Heavy Parts AI →
A3-1-8 Valve Assembly
13***2ZCapscrew, M6 X 500
14***11Seal, Bonded0
14***15Washer, Seal; Replaces Khj08910
See all parts with full part numbers in Heavy Parts AI →
A3-1-7 Valve, Control
13***2ZCapscrew, M6 X 500
14***15Washer, Seal; Replaces Khj08910
14***18Seal, Bonded, 1/2" Bsp0
See all parts with full part numbers in Heavy Parts AI →
A4-3-16 Hydraulic Circuit, Beaver Ii & Iii
14***15Washer, Seal; Replaces Khj08910
14***18Seal, Bonded, 1/2" Bsp0
14***21Seal, Bonded 3/4" Bsp0
See all parts with full part numbers in Heavy Parts AI →
A4-3-17 Pressure Gauge, Beaver
92***01Adapter, Tee0
92***02Connector0
A2***58Panel, Gauge0
See all parts with full part numbers in Heavy Parts AI →
A4-3-10 Hydraulic Circuit, Trojan Ii
13***06Nut0
14***15Washer, Seal; Replaces Khj08910
14***18Seal, Bonded, 1/2" Bsp0
See all parts with full part numbers in Heavy Parts AI →
A4-3-5 Hydraulic Circuit, Compact I & Beaver I
14***18Seal, Bonded, 1/2" Bsp0
22***06Clip, Jubilee0
61***00Hose, 1/2"Bsp X 320mm0
See all parts with full part numbers in Heavy Parts AI →
A4-3-15 Hydraulic Circuit, Compact Ii
14***18Seal, Bonded, 1/2" Bsp0
14***21Seal, Bonded 3/4" Bsp0
16***04Adapter, Male/Female0
See all parts with full part numbers in Heavy Parts AI →
A4-3-2 Hydraulic Circuit, Solite
14***18Seal, Bonded, 1/2" Bsp0
22***06Clip, Jubilee0
9***9Hose, Pump Suction0
See all parts with full part numbers in Heavy Parts AI →
A4-3-13 Hydraulic Circuit, Compact Ii
14***18Seal, Bonded, 1/2" Bsp0
16***04Adapter, Male/Female0
22***06Clip, Jubilee0
See all parts with full part numbers in Heavy Parts AI →
A4-3-7 Hydraulic Circuit, Beaver Ii
14***15Washer, Seal; Replaces Khj08910
14***18Seal, Bonded, 1/2" Bsp3
14***21Seal, Bonded 3/4" Bsp0
See all parts with full part numbers in Heavy Parts AI →
A4-3-9 Hydraulic Circuit, Trojan I
14***18Seal, Bonded, 1/2" Bsp0
14***21Seal, Bonded 3/4" Bsp0
22***06Clip, Jubilee0
See all parts with full part numbers in Heavy Parts AI →
A4-3-11 Hydraulic Circuit, Trojan Ii
14***15Washer, Seal; Replaces Khj08910
14***18Seal, Bonded, 1/2" Bsp0
14***21Seal, Bonded 3/4" Bsp0
See all parts with full part numbers in Heavy Parts AI →
A5-1-2 Tank & Filter, Hydraulic
13***2ZBolt0
13***03Nut0
13***05Screw, Cap0
See all parts with full part numbers in Heavy Parts AI →
A5-1-11 Tank, Hydraulic
13***0ZBolt0
13***3ZScrew, M6x160
13***5ZBolt0
See all parts with full part numbers in Heavy Parts AI →
A5-1-9 Tank, Hydraulic
13***6ZBolt, 5/16"Unf X 1" Long0
13***5ZBolt0
13***8ZScrew, M8x300
See all parts with full part numbers in Heavy Parts AI →
A5-1-10 Tank, Hydraulic
13***0ZBolt0
13***3ZScrew, M6x160
13***5ZBolt0
See all parts with full part numbers in Heavy Parts AI →
A5-1-6 Tank, Hydraulic
13***8ZBolt0
13***3ZScrew, M6x160
13***5ZBolt0
See all parts with full part numbers in Heavy Parts AI →
A5-1-7 Tank, Hydraulic
13***0ZBolt0
13***3ZScrew, M6x160
13***5ZBolt0
See all parts with full part numbers in Heavy Parts AI →
A5-1-4 Fan Housing
13***06Bolt0
13***3ZBolt0
13***03Bolt0
See all parts with full part numbers in Heavy Parts AI →
A5-1-3 Fan Housing
13***05Bolt0
13***06Bolt0
13***03Bolt0
See all parts with full part numbers in Heavy Parts AI →
A5-1-8 Tank, Hydraulic
13***6ZBolt, 5/16"Unf X 1" Long0
13***6ZBolt4
13***5ZBolt0
See all parts with full part numbers in Heavy Parts AI →
A6-1-8 Ram, Power On Demand
13***3ZScrew, M6x160
13***02Nut0
13***09Capscrew, M6 X 350
See all parts with full part numbers in Heavy Parts AI →
A6-1-10 Ram, Power On Demand, Beaver Ii & Iii, Yanmar Engine Models
13***4ZCapscrew0
14***15Washer, Seal; Replaces Khj08910
14***6ZWasher, M60
See all parts with full part numbers in Heavy Parts AI →
A6-1-6 Ram, Power On Demand
14***15Washer, Seal; Replaces Khj08910
14***02Screw1
92***00Ram, Power On Demand0
See all parts with full part numbers in Heavy Parts AI →
A6-1-17 Ram, P.O.D.
13***1ZNut2
24***03O Ring1
33***94Ram Cylinder (P.O.D.1
See all parts with full part numbers in Heavy Parts AI →
A6-1-4 Ram, Power On Demand
13***02Nut0
13***09Capscrew, M6 X 350
14***18Seal, Bonded, 1/2" Bsp0
See all parts with full part numbers in Heavy Parts AI →
A6-1-13 Ram, Power On Demand, Trojan I & Ii Petrol
14***15Washer, Seal; Replaces Khj08910
92***00Ram, Power On Demand0
92***09Bracket, Mounting0
See all parts with full part numbers in Heavy Parts AI →
A6-1-15 Ram, Power On Demand, Beaver Iii Suzuki, Model 929/16600
14***15Washer, Seal; Replaces Khj08910
92***00Ram, Power On Demand0
92***02Bracket, Mounting0
See all parts with full part numbers in Heavy Parts AI →
A6-1-14 Ram, Power On Demand, Beaver Iii Lobardini, Models 929/17200 & 929/18000
14***15Washer, Seal; Replaces Khj08910
92***00Ram, Power On Demand0
92***03Link, Spring0
See all parts with full part numbers in Heavy Parts AI →
A6-1-16 Ram, Power On Demand, Compact Iii
14***15Washer, Seal; Replaces Khj08910
92***00Ram, Power On Demand0
A2***27Pipe, Bundy0
See all parts with full part numbers in Heavy Parts AI →
A6-1-1 Ram, Power On Demand
13***2ZNut; Replaces 162l006vr, San 123520
13***05Screw, Cap0
13***09Capscrew, M6 X 350
See all parts with full part numbers in Heavy Parts AI →
A6-1-7 Ram, Power On Demand
13***5ZBolt, M5 X 20mm Long0
13***3ZScrew, M6x160
14***15Washer, Seal; Replaces Khj08910
See all parts with full part numbers in Heavy Parts AI →
A6-1-9 Ram, Power On Demand, Beaver I,Ii & Iii, Honda Engine Models
14***15Washer, Seal; Replaces Khj08910
92***00Ram, Power On Demand0
A2***49Pipe, Bundy0
See all parts with full part numbers in Heavy Parts AI →
A6-1-5 Ram, Power On Demand
13***3ZScrew, M6x160
13***02Nut0
13***09Capscrew, M6 X 350
See all parts with full part numbers in Heavy Parts AI →
A6-1-12 Ram, Power On Demand, Trojan Ii Diesel
14***08Seal, Washer0
14***15Washer, Seal; Replaces Khj08910
16***01Adapter0
See all parts with full part numbers in Heavy Parts AI →
A6-1-11 Ram, Power On Demand, Trojan I Diesel
13***02Nut0
13***09Capscrew, M6 X 350
14***18Seal, Bonded, 1/2" Bsp0
See all parts with full part numbers in Heavy Parts AI →
A6-1-2 Ram, Power On Demand
13***3ZNut0
13***2ZNut; Replaces 162l006vr, San 123520
13***0ZCapscrew0
See all parts with full part numbers in Heavy Parts AI →
A9-1-3 Battery & Components, Solite 5063
13***5ZBolt0
13***3ZNut0
14***5ZWasher, M5; Replaces 69***590
See all parts with full part numbers in Heavy Parts AI →
A9-1-9 Battery & Components, Beaver Iii
12***03Tie, Cable, L=300mm X W=7.6mm0
13***4ZBolt, M6 X 600
13***5ZBolt, M6 X 350
See all parts with full part numbers in Heavy Parts AI →
A9-1-5 Battery & Components, Trojan I, Model 929/02600 Only
13***1ZSetscrew, M6 X 12mm Long0
13***9ZBolt0
13***10Screw, Cap0
See all parts with full part numbers in Heavy Parts AI →
A9-1-8 Battery & Components, Trojan Ii 30 Litre, Model 929/03400 Only
13***1ZSetscrew, M6 X 12mm Long0
13***3ZNut0
14***5ZWasher, M5; Replaces 69***590
See all parts with full part numbers in Heavy Parts AI →
A9-1-7 Battery & Components, Trojan Ii 20 Litre, Models 929/02600, 929/02800
13***1ZSetscrew, M6 X 12mm Long0
13***03Nut0
14***5ZWasher, M5; Replaces 69***590
See all parts with full part numbers in Heavy Parts AI →
A9-1-2 Battery & Components, Solite 5060
13***5ZBolt0
13***3ZNut0
14***5ZWasher, M5; Replaces 69***590
See all parts with full part numbers in Heavy Parts AI →
A9-1-4 Battery & Components, Solite 5080
13***03Bolt0
13***10Screw, Cap0
14***6ZWasher, M60
See all parts with full part numbers in Heavy Parts AI →
A9-1-6 Battery & Components, Trojan I, Models 929/02800, 929/03400
13***1ZSetscrew, M6 X 12mm Long0
13***3ZNut0
14***5ZWasher, M5; Replaces 69***590
See all parts with full part numbers in Heavy Parts AI →
B Handheld Attachments
B4-3-3 Chassis, Disc Cutter/Chainsaw, Models 5023, 5024
13***05Bolt0
13***01Screw, Cap0
13***05Screw0
See all parts with full part numbers in Heavy Parts AI →
B4-1-1 Motor Drive, Disc Cutter/Chainsaw, Models 5023, 5024
13***2ZCapscrew, M5 X 120
9***1Kit-Seal1
9***3Kit-Seal1
See all parts with full part numbers in Heavy Parts AI →
B4-2-2 Valve, Control, Disc Cutter
13***01Screw, Grub, Cutting Disc0
13***2PScrew, Cap0
14***15Washer, Seal; Replaces Khj08910
See all parts with full part numbers in Heavy Parts AI →
B4-3-1 Chainsaw Model 5023
5***3Tool, Chain Saw, Complete0
A3***50Guard0
A3***73Guard, Hand0
See all parts with full part numbers in Heavy Parts AI →
B4-2-1 Valve Control, Chainsaw
13***2PScrew, Cap0
14***15Washer, Seal; Replaces Khj08910
14***18Seal, Bonded, 1/2" Bsp0
See all parts with full part numbers in Heavy Parts AI →
B4-3-2 Disc Cutter 5024
13***03Screw, Cap0
14***09Washer, M12, Plain0
14***05Washer, 'S'0
See all parts with full part numbers in Heavy Parts AI →
B5-1-1 Motor & Valve, Drill, Rotary Percussive, Model 5020
13***02Capscrew, M5 X 120
14***15Washer, Seal; Replaces Khj08910
14***05Washer, 'S'0
See all parts with full part numbers in Heavy Parts AI →
B5-3-1 Drill Bits, & Accessories
99***01Bit, Drill1
99***02Bit, Drill1
99***03Bit, Drill1
See all parts with full part numbers in Heavy Parts AI →
B5-2-1 Drill, Rotary Percussive, Model 5020
13***07Screw, Cap0
14***15Washer, Seal; Replaces Khj08910
14***7ZWasher, Spring0
See all parts with full part numbers in Heavy Parts AI →
B6-1-11 Breaker, Jcb 28kg, 20 & 30 Litre, Flexi-Handles
14***15Washer, Seal; Replaces Khj08910
14***18Seal, Bonded, 1/2" Bsp0
92***41Housing1
See all parts with full part numbers in Heavy Parts AI →
B6-1-12 Breaker, Stanley, Br67
12***00Breaker, Road0
12***01Handle0
12***02Grab0
See all parts with full part numbers in Heavy Parts AI →
B6-1-13 Demolition Pick Jcb
14***15Washer, Seal; Replaces Khj08910
14***18Seal, Bonded, 1/2" Bsp0
92***08Screw, Charging0
See all parts with full part numbers in Heavy Parts AI →
B6-1-10 Breaker, Jcb 26kg, 20 & 30 Litre, Standard
14***15Washer, Seal; Replaces Khj08910
14***18Seal, Bonded, 1/2" Bsp0
21***5ZPin, Tension0
See all parts with full part numbers in Heavy Parts AI →
B6-2-1 Breaker Steels, 32mm (1 1/4") Shank
99***14Pad, Rammer0
99***15Tool, Moil, Tool, Moil; 380mm Long Below Collar. 160mm (6 1/4") Long Above Collar0
99***16Tool, Chisel, Narrow0
See all parts with full part numbers in Heavy Parts AI →
B6-1-9 Breaker, Jcb 22kg, & Hi-Power 23kg, Flexi-Handles
14***15Washer, Seal; Replaces Khj08910
14***18Seal, Bonded, 1/2" Bsp0
92***00Breaker, Assembly, 22kg, Flexi - Handles1
See all parts with full part numbers in Heavy Parts AI →
B6-1-1 Breaker, Krupp Hm25, Models 995/36400, 5078
13***19Capscrew, M16x90, Grade 12.91
14***15Washer, Seal; Replaces Khj08910
21***03Dowel0
See all parts with full part numbers in Heavy Parts AI →
B6-1-4 Pick, Demolition, Krupp Hm12b, Model 5075
13***11Screw, Cap4
14***15Washer, Seal; Replaces Khj08910
5***9Kit-Hose0
See all parts with full part numbers in Heavy Parts AI →
B6-2-2 Breaker Steels, 22mm (7/8") Shank
PP***58Tool, Chisel, 1 Inch (25mm) Wide0
PP***20Tool, Rammer Stem0
PP***21Tool, Tarmac Cutter 5"0
See all parts with full part numbers in Heavy Parts AI →
B6-1-14 Handles, Demolition Pick
14***7ZWasher, Plain, M8; Replaces Khn1550, San 126204
92***32Handle, 'D'1
92***33Handle, 'T'1
See all parts with full part numbers in Heavy Parts AI →
B6-1-6 Pick, 'T' Handle, Krupp Hm12e, Model 5083
13***11Screw, Cap4
14***15Washer, Seal; Replaces Khj08910
5***9Kit-Hose0
See all parts with full part numbers in Heavy Parts AI →
B6-1-8 Breaker, Jcb 20kg, & Hi Power 23kg, Standard
14***15Washer, Seal; Replaces Khj08910
14***18Seal, Bonded, 1/2" Bsp0
21***5ZPin, Tension1
See all parts with full part numbers in Heavy Parts AI →
B6-1-7 Breaker 25 Kg, Npk H-55
14***15Washer, Seal; Replaces Khj08910
5***9Kit-Hose0
92***00Tool, Breaker H-550
See all parts with full part numbers in Heavy Parts AI →
B6-2-3 Breaker Steels, 25mm (1") Shank
PP***11Tool, Chisel, 22kg0
PP***12Tool, Asphalt Cutter, 22kg0
PP***13Tool, Rammer Pad Stem0
See all parts with full part numbers in Heavy Parts AI →
B7-2-1 Pump, Submersible, & Discharge Hose, 1000 Lbf/In2 (69 Bar)
13***5ZBolt, Star Drive, M8 X 65mm0
13***02Nut0
13***8ZCapscrew0
See all parts with full part numbers in Heavy Parts AI →
B7-3-1 Pump, Submersible, & Discharge Hose, 2000 Lbf/In2 (138 Bar)
13***5ZBolt, Star Drive, M8 X 65mm0
13***02Nut0
13***8ZCapscrew0
See all parts with full part numbers in Heavy Parts AI →
B7-4-1 Pump, Submersible, & Discharge Hose, 2000lbf/In2 (138 Bar)
13***5ZBolt, Star Drive, M8 X 65mm0
13***02Nut0
13***8ZCapscrew0
See all parts with full part numbers in Heavy Parts AI →
B8-1-2 Circuit, Lighting
92***00Kit, Lighting Circuit1
PP***32Screw, Button Head1
See all parts with full part numbers in Heavy Parts AI →
B8-1-1 Circuit, Lighting
9***7Kit, Lighting Circuit1
PP***32Screw, Button Head1
See all parts with full part numbers in Heavy Parts AI →
B9-1-1 Auger, Earth
13***4ZScrew, Grub0
33***78Adapter, Pin1
33***92Adapter, Assembly1
See all parts with full part numbers in Heavy Parts AI →
B10-5-1 Valve Assembly
92***04Valve, Assembly0
92***96Handle, Twist Grip0
92***97Housing, Valve0
See all parts with full part numbers in Heavy Parts AI →
B10-2-1 Impact Mechanism
92***01Gearbox, Impact0
92***27Seal, Oil0
92***28Housing, Front0
See all parts with full part numbers in Heavy Parts AI →
B10-4-1 Rear Plate Assembly
92***03Plate, Assembly, Rear0
92***77Plate, Rear0
92***78Plug0
See all parts with full part numbers in Heavy Parts AI →
B10-3-1 Motor Assembly
92***02Motor, Assembly0
92***54Motor0
92***55Housing, Motor0
See all parts with full part numbers in Heavy Parts AI →
B10-1-1 Impact Wrench, 1" Square Drive
14***15Washer, Seal; Replaces Khj08910
92***00Wrench, Impact0
92***10Handle, Top0
See all parts with full part numbers in Heavy Parts AI →

Frequently asked questions

What engine does the JCB Compact I 5087 use?

The machine uses a JCB Diesel by Kohler engine, rated at 74 hp (55 kW). It operates without a Diesel Particulate Filter (DPF) or Diesel Exhaust Fluid (DEF), eliminating regeneration downtime.

What is the operating weight of the JCB Compact I 5087?

Operating weight varies by configuration and series, typically ranging from 4.8 to 5.0 metric tonnes (approximately 10,500 to 11,000 lbs) for the 50Z-I class compact excavators.

What model replaced the JCB Compact I 5087?

The JCB Compact series, including the 50Z-I and 55Z-I models, continues in production as part of the current mini excavator lineup. Specific successor designations are not documented for the exact 5087 variant in available sources.

What COMPACT I 5087 owners discuss

What are the known powertrain and hydraulic behaviors for the JCB COMPACT I 5087?
The machine utilizes a hydrostatic drive system with a shuttle transmission. Common hydraulic behaviors include reliance on low-viscosity hydraulic fluid for optimal performance in compact configurations. The system uses O-Ring Face Seal (ORFS) fittings to maintain sealing integrity under pressure. Operators note that hydraulic flow is programmable, allowing for high-flow or optional low-flow auxiliary lines to match attachment requirements. The engine is tuned for high torque at low RPMs (1,300–1,400 RPM) to match hydraulic demand efficiently.
What undercarriage or wear patterns are typical for this machine type?
The undercarriage features a heavy-duty, fully welded H-frame structure with a low center of gravity. Typical wear patterns include track tension issues and sprocket/idler alignment shifts due to rigorous use in tight spaces. Track rollers and idlers are sealed units that are not lubricable by the operator; they require replacement when internal wear occurs. The sloped track frame is designed to prevent dirt build-up, but debris accumulation can accelerate wear on the two-speed track motors and enclosed hoses if not cleared regularly.
What engine quirks are associated with the COMPACT I 5087 series?
The machine is equipped with a JCB Diesel by Kohler engine that does not require a Diesel Particulate Filter (DPF) or Diesel Exhaust Fluid (DEF). A common operational quirk is the need for extended glow plug cycling during cold weather starts to ensure reliable ignition. The engine is sensitive to coolant levels; low coolant can trigger extended glow plug cycles or starting hesitation. Regular inspection of the radiator for debris is critical to prevent overheating, as the compact layout limits airflow.
What are the common electrical or sensor issues reported?
Electrical issues often involve the forward/reverse shuttle control system. The shuttle lever operates microswitches that activate hydraulic solenoids on the transmission body. A common failure point is the forward microswitch or inhibitor switch, which can cause intermittent forward operation or prevent the machine from starting if the switch is bridged or faulty. Wiring harnesses in skid steer and compact configurations are prone to damage from vibration and site debris, leading to intermittent power loss or malfunctioning controls. Operators should verify voltage at the solenoids to isolate electrical faults from mechanical ones.
What should be checked when buying a used COMPACT I 5087?
Verify the exact serial number and model year via the machine identification plate, as specifications vary by configuration and series. Check the shuttle transmission for smooth engagement in both forward and reverse, noting any hesitation or jerking. Inspect the hydraulic system for leaks at the ORFS fittings and check the hydraulic filter for metal filings indicating pump wear. Test the engine cold start capability and monitor for black smoke, which may indicate injector or glow plug issues. Examine the undercarriage for track tension, sprocket wear, and sealed roller integrity. Confirm the condition of the forward/reverse microswitches and wiring harnesses for corrosion or damage.
What safety-critical fix is associated with the shuttle transmission?
Ensure the forward/reverse inhibitor switch is functioning correctly to prevent the engine from starting in gear. A faulty switch can allow the machine to move unexpectedly upon startup. Have your dealer verify the switch operation and wiring integrity.

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 COMPACT I 5087. Related factory variants of the same model family:

COMPACT I 5087COMPACT I 5087

Need a specific COMPACT I 5087 part?

Search live OEM part data, check fitment, and cross-reference alternatives with Heavy Parts AI.