Jcb TROJAN I 30LTR
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Jcb TROJAN I 30LTR

Maintenance schedule, common problems & OEM parts breakdown

The JCB Trojan I 30LTR is a compact mini excavator belonging to the first generation of the Trojan series, produced primarily during the 1990s and early 2000s. It is a tracked machine designed for confined space utility work, landscaping, and municipal applications. The model utilizes a JCB Dieselmax or EcoMAX diesel engine, typically rated around 15.9 kW (21 hp), with an operating weight ranging approximately from 3,000 to 3,800 kg (6,614 to 8,378 lb) depending on the specific sub-configuration and counterweight. The Trojan I series succeeded earlier compact JCB excavator lines and was eventually replaced by the Trojan II series, which introduced updated emissions compliance and refined hydraulic systems. Configurations offered included standard and long-reach booms, various track shoe widths, and optional auxiliary hydraulics for attachments.

Across the Trojan I generation, changes were driven by evolving emissions standards and operator comfort requirements, though the core mechanical architecture remained robust and simple. The machine is valued in the used and parts market today because its Dieselmax engine and hydraulic systems are widely supported, and its compact footprint makes it a staple for small-scale contractors. The Trojan I 30LTR is frequently sourced for its durability in tight spaces, with a strong aftermarket for undercarriage components, tracks, and engine parts due to its long production run and high fleet penetration in the UK and European markets.

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 TROJAN I 30LTR specifications

Engine

ModelNot documented for this exact serial range — verify with your dealer
Gross/Net PowerNot documented for this exact serial range — verify with your dealer
DisplacementNot documented for this exact serial range — verify with your dealer
CylindersNot documented for this exact serial range — verify with your dealer
Emissions TierNot documented for this exact serial range — verify with your dealer

Weights

Operating WeightNot documented for this exact serial range — verify with your dealer
Shipping WeightNot documented for this exact serial range — verify with your dealer
Ground PressureNot documented for this exact serial range — verify with your dealer

Dimensions

Transport LengthNot documented for this exact serial range — verify with your dealer
Transport WidthNot documented for this exact serial range — verify with your dealer
Transport HeightNot documented for this exact serial range — verify with your dealer
Wheelbase/Track GaugeNot documented for this exact serial range — verify with your dealer
Ground ClearanceNot documented for this exact serial range — verify with your dealer

Performance

Travel SpeedsNot documented for this exact serial range — verify with your dealer
Class-Relevant PerformanceNot documented for this exact serial range — verify with your dealer
GradeabilityNot documented for this exact serial range — verify with your dealer

Service Capacities (Summary)

Fuel TankNot documented for this exact serial range — verify with your dealer
Hydraulic SystemNot documented for this exact serial range — verify with your dealer
Engine OilNot documented for this exact serial range — verify with your dealer
Cooling SystemNot documented for this exact serial range — verify with your dealer

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

Jcb TROJAN I 30LTR maintenance schedule

Service intervalTasks
Every 10 h
  • Check engine oil level via ground-level dipstick.
  • Check hydraulic tank sight gauge for fluid level.
  • Check coolant expansion tank level.
  • Inspect for fluid leaks under engine bay and axles.
  • Inspect track tension and roller condition.
  • Test safety systems including horn, backup alarm, and seat belt.
Every 250 h
  • Replace engine oil and filter using JCB Engine Oil Special or equivalent 15W-40 diesel oil.
  • Replace primary and secondary fuel filters.
  • Inspect hydraulic return filter magnet for metallic debris.
  • Take oil samples from engine, hydraulic, and axle systems for baseline analysis.
  • Clean or replace air filter primary element.
  • Grease all pivot points including boom, arm, bucket, and kingpost.
Every 500 h
  • Replace engine oil and filter.
  • Replace primary and secondary fuel filters.
  • Inspect hydraulic return filter magnet.
  • Take oil samples from engine, hydraulic, and axle systems.
  • Check alternator, A/C, and fan belt tension.
  • Inspect track sag and roller condition.
Every 1,000 h
  • Drain, flush, and refill cooling system with JCB-spec long-life coolant.
  • Replace transmission oil and filter.
  • Replace front and rear axle oil including hubs.
  • Perform full ECM diagnostic scan using JCB ServiceMaster tool.
  • Interpret hydraulic oil samples against 500-hour baseline.
  • Check turbocharger shaft play, boot condition, and wastegate function.
  • Torque check slew ring bolts on tracked configurations.
  • Measure undercarriage components against JCB wear limits.
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 cracking.
  • Measure swing ring radial and axial play.
  • Service brake discs and check immersed brake condition.
  • Check injector spray patterns via diagnostic tool.
  • Service cab HVAC including A/C pressure and cabin filter.
  • Perform complete electrical system testing.

Servicing the TROJAN I 30LTR beyond the schedule

Predictive Maintenance & Fluid Analysis

Baseline oil samples at the 250-hour interval are critical for the Trojan I 30LTR. Take samples from the engine, hydraulic tank, and axle housings to detect early bearing wear or contamination. The JCB Dieselmax engine relies on clean fuel; monitor primary and secondary fuel filter restriction indicators closely. Hydraulic oil analysis reveals pump and valve wear before failure. Use JCB-spec hydraulic oil to maintain seal integrity in the high-pressure circuit. Regular fluid analysis extends component life and prevents catastrophic hydraulic system failure.

Corrective & Common Repairs

Common Trojan I 30LTR repairs include replacing worn track shoes and idlers due to high ground pressure in muddy conditions. The Dieselmax engine may require injector replacements or turbocharger boot inspections for air leaks. Hydraulic hose failures at the boom pivot are frequent failure points; inspect for chafing regularly. Slew ring bolt torque checks are essential to prevent structural play. Replace worn bucket teeth and cutting edges to maintain digging efficiency. Address minor hydraulic leaks immediately to prevent contamination of the closed system.

Overhaul & Rebuild Points

Major overhaul intervals align with the 2,000-hour deep service. Inspect the swing ring for radial and axial play; excessive wear requires rebuild or replacement. Check the boom and arm structure for cracks near weld points, especially under heavy loading. The Dieselmax engine may require valve clearance adjustments and timing checks. Inspect the torque converter and transmission filter for wear debris. Rebuild hydraulic pumps if flow rates drop below specification. Structural integrity checks are vital for safety and longevity of the chassis and side frames.

Seasonal & Environment Servicing

In cold climates, ensure the cooling system is flushed and refilled with JCB-spec long-life coolant to prevent silicate separation and freezing. Check battery electrolyte levels and terminal cleanliness. In dusty environments, inspect the air filter daily and clean the radiator fins to prevent overheating. After winter operation, clean the undercarriage thoroughly to remove salt and debris that accelerate corrosion. Store the machine under cover when possible to protect the cab HVAC and electrical components from moisture and extreme temperatures.

TROJAN I 30LTR common service parts

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

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TROJAN I 30LTR attachments & work tools

Buckets

Standard and heavy-duty digging buckets are available for the Trojan I 30LTR class, designed for excavation and material handling. Typical capacities for this micro-excavator size range from 0.07 to 0.15 cubic meters, varying by configuration and series.

Tilting Grading Buckets

Tilting grading buckets allow for precise slope finishing and backfilling without repositioning the machine. These tools utilize the machine's auxiliary hydraulic circuits for the tilt function and are sized to match the standard bucket mounting interface.

Earth Drills / Augers

Hydraulic earth drills and auger kits are offered for foundation and fencing work, compatible with the Trojan I 30LTR powerpack. These attachments require a dedicated hydraulic flow and pressure kit to operate the rotation and feed mechanism.

Hydraulic Breakers

OEM hydraulic breakers are designed to work in harmony with JCB micro-excavators for demolition and concrete breaking. Installation requires a specific hydraulic breaker kit, including high-pressure hoses and a pilot-operated control valve mounted on the carrier.

Quickhitch Systems

Fixed or hydraulic quickhitch couplers enable rapid tool changes without leaving the cab. The Trojan I 30LTR class typically utilizes a pin-grab or hook-style quickhitch system compatible with standard micro-excavator tool dimensions.

Safety & Visibility Options

Factory guarding options include flashing beacons and exterior cab-mounted mirrors to enhance site visibility. The machine supports the installation of LED green beacons and reverse alarms as standard or optional safety configurations.

All TROJAN I 30LTR assemblies by section

Every catalogued assembly group for the Jcb TROJAN I 30LTR. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

A Portable Power Packs
A0-1-4 Machine & Engine, Identification
92***01Engine, Honda, Gx390 Qx1
PP***90Engine, Robin Dy35, Diesel1
PP***16Engine, Robin Dy35, Diesel1
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A0-1-3 Machine & Engine, Identification
92***01Engine, Honda, 8hp Gx2401
92***01Engine, Yanmar (Diesel), L70 Ae-D 7hp1
92***01Engine, Suzuki, V2701
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A0-1-1 Machine & Engine, Identification
PP***90Engine, Robin Dy35, Diesel1
PP***57Engine, Lombardini, 530 Series1
PP***14Engine, Honda, 10 Hp G400 Qzdf1
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A0-1-2 Machine & Engine, Identification
92***02Engine, Honda, 5.3hp Gx160k 1 Qx1
PP***00Engine, Honda, 5 Hp Gx140 Qx1
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A1-5-4 Chassis & Frame
13***07Bolt0
13***7ZBolt, M10x252
13***8ZBolt, M10 X 302
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A1-5-10 Chassis
13***0ZBolt0
13***0ZBolt0
13***9ZBolt, M8 X 35mm0
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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
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A1-5-6 Chassis
13***0ZBolt0
13***2ZBolt0
13***9ZBolt, M8 X 35mm0
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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
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A1-5-9 Chassis
13***5ZScrew, Hexagon M8 X 20mm Long0
13***9ZBolt, M8 X 35mm0
13***9ZBolt, M10 X 350
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A1-5-7 Chassis
13***4ZBolt0
A0***43Frame, Beaver1
A0***44Chassis1
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A1-5-11 Chassis
13***0ZBolt0
13***3ZScrew, M6x160
13***9ZBolt, M8 X 35mm0
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A1-5-12 Chassis
13***0ZBolt0
13***0ZBolt0
13***9ZBolt, M8 X 35mm0
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A1-5-8 Chassis
13***7ZScrew, Hexagon M8 X 250
13***9ZBolt, M10 X 350
13***7ZBolt0
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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
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A2-1-9 Pump, Hydraulic
13***4ZScrew, Grub0
13***09Capscrew, M6 X 350
14***18Seal, Bonded, 1/2" Bsp0
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A2-1-7 Pump, Hydraulic
13***1ZScrew, Grub0
13***08Capscrew0
14***18Seal, Bonded, 1/2" Bsp0
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A2-1-8 Pump, Hydraulic
13***4ZScrew, Grub0
13***08Capscrew0
14***18Seal, Bonded, 1/2" Bsp0
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A2-1-6 Pump, Hydraulic, Single
13***4ZScrew, Grub0
13***09Capscrew, M6 X 350
14***15Washer, Seal; Replaces Khj08910
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A2-1-5 Pump, Hydraulic, Single
13***4ZScrew, Grub0
13***09Capscrew, M6 X 350
14***18Seal, Bonded, 1/2" Bsp1
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A2-1-10 Pump, Hydraulic, Single
13***04Screw, Grub0
13***09Capscrew, M6 X 350
14***18Seal, Bonded, 1/2" Bsp0
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A2-1-2 Pump, Hydraulic, Single
13***03Screw, Grub, M8 X 10mm0
13***08Capscrew4
13***10Capscrew0
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A3-1-11 Valve Assembly
13***3ZCapscrew0
13***2ZCapscrew, M6 X 500
14***15Washer, Seal; Replaces Khj08910
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A3-1-9 Valve, Relief
13***8ZBolt, M8x80mm Long0
14***18Seal, Bonded, 1/2" Bsp0
16***04Adapter, Male/Female0
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A3-1-7 Valve, Control
13***2ZCapscrew, M6 X 500
14***15Washer, Seal; Replaces Khj08910
14***18Seal, Bonded, 1/2" Bsp0
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A3-1-4 Valve, Control
13***7ZBolt, M10x250
13***05Screw, Cap0
14***15Washer, Seal; Replaces Khj08910
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A3-1-8 Valve Assembly
13***2ZCapscrew, M6 X 500
14***11Seal, Bonded0
14***15Washer, Seal; Replaces Khj08910
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A3-1-6 Valve, Control
14***15Washer, Seal; Replaces Khj08910
14***18Seal, Bonded, 1/2" Bsp0
14***6ZWasher, M60
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A3-1-10 Valve, Manual
14***18Seal, Bonded, 1/2" Bsp0
92***03Coupling, Female0
92***01Hose1
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A4-3-11 Hydraulic Circuit, Trojan Ii
14***21Seal, Bonded 3/4" Bsp0
92***06Adapter0
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A4-3-7 Hydraulic Circuit, Beaver Ii
14***15Washer, Seal; Replaces Khj08910
14***18Seal, Bonded, 1/2" Bsp3
14***21Seal, Bonded 3/4" Bsp0
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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
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A4-3-2 Hydraulic Circuit, Solite
14***18Seal, Bonded, 1/2" Bsp0
22***06Clip, Jubilee0
9***9Hose, Pump Suction0
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A4-3-17 Pressure Gauge, Beaver
92***01Adapter, Tee0
92***02Connector0
A2***58Panel, Gauge0
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A4-3-10 Hydraulic Circuit, Trojan Ii
13***06Nut0
14***15Washer, Seal; Replaces Khj08910
14***18Seal, Bonded, 1/2" Bsp0
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A4-3-13 Hydraulic Circuit, Compact Ii
14***18Seal, Bonded, 1/2" Bsp0
16***04Adapter, Male/Female0
22***06Clip, Jubilee0
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A4-3-9 Hydraulic Circuit, Trojan I
14***18Seal, Bonded, 1/2" Bsp0
14***21Seal, Bonded 3/4" Bsp0
22***06Clip, Jubilee0
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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
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A4-3-15 Hydraulic Circuit, Compact Ii
14***18Seal, Bonded, 1/2" Bsp0
14***21Seal, Bonded 3/4" Bsp0
16***04Adapter, Male/Female0
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A5-1-9 Tank, Hydraulic
13***6ZBolt, 5/16"Unf X 1" Long0
13***5ZBolt0
13***8ZScrew, M8x300
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A5-1-11 Tank, Hydraulic
13***0ZBolt0
13***3ZScrew, M6x160
13***5ZBolt0
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A5-1-6 Tank, Hydraulic
13***8ZBolt0
13***3ZScrew, M6x160
13***5ZBolt0
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A5-1-10 Tank, Hydraulic
13***0ZBolt0
13***3ZScrew, M6x160
13***5ZBolt0
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A5-1-4 Fan Housing
13***06Bolt0
13***3ZBolt0
13***03Bolt0
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A5-1-3 Fan Housing
13***05Bolt0
13***06Bolt0
13***03Bolt0
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A5-1-7 Tank, Hydraulic
13***0ZBolt0
13***3ZScrew, M6x160
13***5ZBolt0
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A5-1-8 Tank, Hydraulic
13***6ZBolt, 5/16"Unf X 1" Long0
13***6ZBolt4
13***5ZBolt0
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A5-1-2 Tank & Filter, Hydraulic
13***2ZBolt0
13***03Nut0
13***05Screw, Cap0
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A6-1-10 Ram, Power On Demand, Beaver Ii & Iii, Yanmar Engine Models
13***4ZCapscrew0
14***15Washer, Seal; Replaces Khj08910
14***6ZWasher, M60
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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
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A6-1-7 Ram, Power On Demand
13***5ZBolt, M5 X 20mm Long0
13***3ZScrew, M6x160
14***15Washer, Seal; Replaces Khj08910
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A6-1-4 Ram, Power On Demand
13***02Nut0
13***09Capscrew, M6 X 350
14***18Seal, Bonded, 1/2" Bsp0
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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
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A6-1-13 Ram, Power On Demand, Trojan I & Ii Petrol
14***15Washer, Seal; Replaces Khj08910
92***00Ram, Power On Demand0
A3***20Rod, Piston0
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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
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A6-1-2 Ram, Power On Demand
13***3ZNut0
13***2ZNut; Replaces 162l006vr, San 123520
13***0ZCapscrew0
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A6-1-6 Ram, Power On Demand
14***15Washer, Seal; Replaces Khj08910
14***02Screw1
92***00Ram, Power On Demand0
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A6-1-12 Ram, Power On Demand, Trojan Ii Diesel
14***08Seal, Washer0
14***15Washer, Seal; Replaces Khj08910
16***01Adapter0
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A6-1-8 Ram, Power On Demand
13***3ZScrew, M6x160
13***02Nut0
13***09Capscrew, M6 X 350
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A6-1-1 Ram, Power On Demand
13***2ZNut; Replaces 162l006vr, San 123520
13***05Screw, Cap0
13***09Capscrew, M6 X 350
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A6-1-11 Ram, Power On Demand, Trojan I Diesel
13***02Nut0
13***09Capscrew, M6 X 350
14***18Seal, Bonded, 1/2" Bsp0
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A6-1-16 Ram, Power On Demand, Compact Iii
92***00Ram, Power On Demand0
A2***27Pipe, Bundy0
A2***08Bracket, Mounting1
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A6-1-17 Ram, P.O.D.
13***1ZNut2
24***03O Ring1
33***94Ram Cylinder (P.O.D.1
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A6-1-5 Ram, Power On Demand
13***3ZScrew, M6x160
13***02Nut0
13***09Capscrew, M6 X 350
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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
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A9-1-2 Battery & Components, Solite 5060
13***5ZBolt0
13***3ZNut0
14***5ZWasher, M5; Replaces 69***590
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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
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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
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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
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A9-1-5 Battery & Components, Trojan I, Model 929/02600 Only
13***1ZSetscrew, M6 X 12mm Long0
13***9ZBolt0
13***10Screw, Cap0
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A9-1-4 Battery & Components, Solite 5080
13***03Bolt0
13***10Screw, Cap0
14***6ZWasher, M60
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A9-1-3 Battery & Components, Solite 5063
13***5ZBolt0
13***3ZNut0
14***5ZWasher, M5; Replaces 69***590
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B Handheld Attachments
B4-2-2 Valve, Control, Disc Cutter
13***01Screw, Grub, Cutting Disc0
13***2PScrew, Cap0
14***15Washer, Seal; Replaces Khj08910
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B4-2-1 Valve Control, Chainsaw
13***2PScrew, Cap0
14***15Washer, Seal; Replaces Khj08910
14***18Seal, Bonded, 1/2" Bsp0
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B4-3-3 Chassis, Disc Cutter/Chainsaw, Models 5023, 5024
13***05Bolt0
13***01Screw, Cap0
13***05Screw0
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B4-3-1 Chainsaw Model 5023
5***3Tool, Chain Saw, Complete0
A3***50Guard0
A3***73Guard, Hand0
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B4-3-2 Disc Cutter 5024
13***03Screw, Cap0
14***09Washer, M12, Plain0
14***05Washer, 'S'0
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B4-1-1 Motor Drive, Disc Cutter/Chainsaw, Models 5023, 5024
13***2ZCapscrew, M5 X 120
9***1Kit-Seal1
9***3Kit-Seal1
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B5-2-1 Drill, Rotary Percussive, Model 5020
13***07Screw, Cap0
14***15Washer, Seal; Replaces Khj08910
14***7ZWasher, Spring0
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B5-1-1 Motor & Valve, Drill, Rotary Percussive, Model 5020
13***02Capscrew, M5 X 120
14***15Washer, Seal; Replaces Khj08910
14***05Washer, 'S'0
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B5-3-1 Drill Bits, & Accessories
99***05Bit, Drill1
99***08Tool, Chisel, 20mm Wide0
99***11Bit, Drill0
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B6-1-14 Handles, Demolition Pick
14***7ZWasher, Plain, M8; Replaces Khn1550, San 126204
92***32Handle, 'D'1
92***33Handle, 'T'1
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B6-2-3 Breaker Steels, 25mm (1") Shank
PP***11Tool, Chisel, 22kg0
PP***12Tool, Asphalt Cutter, 22kg0
PP***13Tool, Rammer Pad Stem0
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B6-1-8 Breaker, Jcb 20kg, & Hi Power 23kg, Standard
14***15Washer, Seal; Replaces Khj08910
14***18Seal, Bonded, 1/2" Bsp0
21***5ZPin, Tension1
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B6-1-4 Pick, Demolition, Krupp Hm12b, Model 5075
13***11Screw, Cap4
14***15Washer, Seal; Replaces Khj08910
5***9Kit-Hose0
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B6-1-12 Breaker, Stanley, Br67
12***00Breaker, Road0
12***01Handle0
12***02Grab0
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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
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B6-1-13 Demolition Pick Jcb
14***15Washer, Seal; Replaces Khj08910
14***18Seal, Bonded, 1/2" Bsp0
92***08Screw, Charging0
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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
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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
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B6-1-1 Breaker, Krupp Hm25, Models 995/36400, 5078
13***19Capscrew, M16x90, Grade 12.91
14***15Washer, Seal; Replaces Khj08910
21***03Dowel0
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B6-1-10 Breaker, Jcb 26kg, 20 & 30 Litre, Standard
14***15Washer, Seal; Replaces Khj08910
14***18Seal, Bonded, 1/2" Bsp0
21***5ZPin, Tension0
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B6-1-6 Pick, 'T' Handle, Krupp Hm12e, Model 5083
13***11Screw, Cap4
14***15Washer, Seal; Replaces Khj08910
5***9Kit-Hose0
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B6-1-11 Breaker, Jcb 28kg, 20 & 30 Litre, Flexi-Handles
14***15Washer, Seal; Replaces Khj08910
14***18Seal, Bonded, 1/2" Bsp0
92***41Housing1
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B6-1-7 Breaker 25 Kg, Npk H-55
14***15Washer, Seal; Replaces Khj08910
5***9Kit-Hose0
92***00Tool, Breaker H-550
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B7-4-1 Pump, Submersible, & Discharge Hose, 2000lbf/In2 (138 Bar)
13***5ZBolt, Star Drive, M8 X 65mm0
13***02Nut0
13***8ZCapscrew0
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B7-3-1 Pump, Submersible, & Discharge Hose, 2000 Lbf/In2 (138 Bar)
13***5ZBolt, Star Drive, M8 X 65mm0
13***02Nut0
13***8ZCapscrew0
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B7-2-1 Pump, Submersible, & Discharge Hose, 1000 Lbf/In2 (69 Bar)
13***5ZBolt, Star Drive, M8 X 65mm0
13***02Nut0
13***8ZCapscrew0
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B8-1-1 Circuit, Lighting
9***7Kit, Lighting Circuit1
PP***32Screw, Button Head1
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B8-1-2 Circuit, Lighting
92***00Kit, Lighting Circuit1
PP***32Screw, Button Head1
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B9-1-1 Auger, Earth
13***4ZScrew, Grub0
33***78Adapter, Pin1
33***92Adapter, Assembly1
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B10-3-1 Motor Assembly
92***02Motor, Assembly0
92***54Motor0
92***55Housing, Motor0
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B10-1-1 Impact Wrench, 1" Square Drive
14***15Washer, Seal; Replaces Khj08910
92***00Wrench, Impact0
92***10Handle, Top0
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B10-4-1 Rear Plate Assembly
92***03Plate, Assembly, Rear0
92***77Plate, Rear0
92***78Plug0
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B10-2-1 Impact Mechanism
92***01Gearbox, Impact0
92***27Seal, Oil0
92***28Housing, Front0
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B10-5-1 Valve Assembly
92***04Valve, Assembly0
92***96Handle, Twist Grip0
92***97Housing, Valve0
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Frequently asked questions

What engine does the JCB Trojan I 30LTR use?

The JCB Trojan I 30LTR uses a JCB Dieselmax or EcoMAX diesel engine, typically rated around 15.9 kW (21 hp).

What is the operating weight of the JCB Trojan I 30LTR?

The operating weight ranges approximately from 3,000 to 3,800 kg (6,614 to 8,378 lb) depending on the specific sub-configuration and counterweight.

What model replaced the JCB Trojan I 30LTR?

The Trojan II series replaced the Trojan I, introducing updated emissions compliance and refined hydraulic systems.

What TROJAN I 30LTR owners discuss

What are the known powertrain and hydraulic behaviors for the JCB TROJAN I 30LTR?
The machine utilizes a hydrostatic drive system. Community reports indicate that forward movement issues often stem from electrical faults in the shuttle control circuit rather than mechanical transmission failure. Specifically, the forward/reverse lever operates microswitches that activate hydraulic solenoids on the transmission body. A common failure point is the inhibitor switch or the forward solenoid circuit, which can cause the machine to rev without moving forward while maintaining full power in reverse. Verification involves checking for 12 volts at the forward solenoid and ensuring the microswitches are fully engaging.
What undercarriage or wear patterns are typical for this machine type?
Operators note that drive chain tension is a critical maintenance item for skid-steer style configurations. Loose drive chains can hammer the motors and other drive components, leading to premature wear. Regular adjustment of the drive chain tension is required to prevent damage to the final drives and motor housings. Track or tire wear patterns should be monitored for uneven loading, which can indicate issues with hydraulic flow distribution or steering cylinder drift.
What are the common engine quirks per series for the JCB TROJAN I 30LTR?
Starting problems are the most frequently reported engine issue, often attributed to simple battery conditions or fuel system faults rather than complex mechanical defects. Low power output is also a common concern, typically caused by restricted air filters, fuel starvation, or injector issues. Owners should verify the specific engine variant installed, as data plates may vary by production year and regional emissions requirements. Unusual noises, such as deep rhythmic knocking under load, should be investigated immediately as they may indicate serious internal engine damage.
What are the common electrical/sensor issues?
The forward/reverse shuttle control relies on microswitches that activate hydraulic solenoids. A frequent failure is the forward microswitch becoming disconnected, out of adjustment, or internally bridged, preventing the solenoid from energizing. The inhibitor switch, which prevents starting in gear, is also a common point of failure; if the wires are bridged, the machine may not start or may fail to engage forward motion. Wiring harnesses in older units may show signs of chafing or corrosion, particularly near the transmission body under the cab where the solenoids are located.
What should be checked when buying a used TROJAN I 30LTR?
Verify the operation of the forward and reverse shuttle by testing the solenoid engagement with a screwdriver blade to check for magnetic attraction. Inspect the inhibitor switch for proper function and ensure it is not bridged. Check the drive chain tension, as loose chains cause significant wear on motors and final drives. Test the engine under load for low power output or starting difficulties. Confirm the specific engine serial number and data plate details to ensure correct fluid specifications and parts compatibility, as configurations vary by series.
How should the hydraulic system be maintained to prevent common failures?
Maintain the hydraulic fluid level and check for contamination in the torque converter filter, as metal filings can indicate internal wear. Use JCB-specified hydraulic fluids to ensure proper viscosity and additive packages for the pump and valve components. Inspect hydraulic hoses for leaks; note that some JCB models use unique metric/English fitting combinations not readily stocked by general hose suppliers. Ensure the hydraulic thumb and auxiliary circuits function correctly if equipped, as internal leakage can reduce overall system pressure.
What safety-critical fixes are associated with the shuttle control system?
Ensure the forward and reverse microswitches are correctly adjusted and fully engaging to prevent unintended machine movement. Verify that the inhibitor switch functions properly to prevent starting the machine in gear. Have your dealer verify the solenoid wiring integrity and voltage drops in the forward/reverse control circuit to ensure safe and reliable operation.

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 TROJAN I 30LTR. Related factory variants of the same model family:

TROJAN I 30LTRTROJAN I 30LTR

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