Komatsumobile debris crusher(no series)
Komatsu BR550JG-1(S/N 1001-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu BR550JG-1(S/N 1001-UP) is a self-propelled mobile jaw crusher built for on-site demolition and construction-debris recycling. It runs a Komatsu SAA6D125E-2 six-cylinder, turbocharged, air-to-air aftercooled diesel of 11.04L displacement, rated 228 kW (306 HP) at 1950 rpm, and carries an operating weight of 47,500 kg (104,720 lb) with standard 500mm shoes; final weight varies slightly with fitted options. There is no separate transmission or axle set: the machine runs an all-hydraulic drive on an excavator-derived crawler undercarriage, with a jaw crusher inlet around 1120 x 765mm and an adjustable discharge setting of 55-200mm giving a treatment capacity of roughly 100-460 t/h. The BR550JG-1 sits in Komatsu's Galeo-generation JG mobile crusher line, following the original BR550JG and preceding the larger, Tier III-engined BR580JG-1. Configurations offered include the standard vibratory grizzly feeder and high-speed discharge conveyor, with optional magnetic separator, side muck conveyor, KOMTRAX remote monitoring, and radio remote control for operator positioning away from the crusher.
Across the JG mobile crusher generations, the biggest change was Komatsu bringing crusher module manufacturing in-house and applying the same engineering concept used on the BR380JG to the higher-capacity BR550/580 platform, tightening the match between the crusher, feeder, and the excavator-based running gear. The engine line also moved forward a step between generations, from the SAA6D125E-2 used on the BR550JG-1 to the SAA6D125E-5 Tier III engine on the successor BR580JG-1, along with a step up in engine power and operating weight. The BR550JG-1 predates digital fault-code diagnostics: it relies on a warning-lamp and buzzer trouble-monitoring system rather than an electronic code readout, which is exactly why it remains attractive in the used market today. Fewer emissions-control and electronic-diagnostic components mean simpler troubleshooting and lower rebuild cost, and its undercarriage, final drive, and engine share parts commonality with contemporary Komatsu excavators of similar class. For recyclers and demolition contractors running older fleets, that combination keeps the BR550JG-1(S/N 1001-UP) in active service and keeps demand steady for its crusher wear parts, undercarriage components, and engine service parts.
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.
Komatsu BR550JG-1(S/N 1001-UP) specifications
Engine
| Model | Komatsu SAA6D125E-2 |
| Type | 4-cycle, water-cooled, direct injection |
| Aspiration | Turbocharged, air-to-air aftercooled |
| Cylinders | 6, in-line |
| Bore x stroke | 125 mm x 150 mm (4.92 in x 5.91 in) |
| Displacement | 11.04 L (674 cu in) |
| Flywheel power | 228 kW / 306 HP @ 1950 rpm (SAE J1349 gross) |
| Governor | All-speed, electrical |
| Emissions tier | Not published on the factory spec sheet for this model year — verify with your dealer |
Weights
| Operating weight | 47,500 kg (104,720 lb), includes 500 mm track shoes |
| Ground pressure | Not published on the factory spec sheet |
Dimensions
| Overall / transport length | 13,430 mm (44'1") |
| Overall width | 3,115 mm (10'3") |
| Transport width | 2,995 mm (9'10") |
| Overall height (working, hopper up) | 3,640 mm (11'11") |
| Transport height | 3,395 mm (11'2") with rotary lamp, muffler, pre-cleaner and mirror removed; 3,505 mm (11'6") with only rotary lamp and muffler removed |
| Track gauge | 2,480 mm (8'2") |
| Track width | 2,980 mm (9'9") |
| Shoe width | 500 mm (19.7 in) |
| Minimum ground clearance (travel) | 350 mm (1'2") |
| Length of track on ground | 3,700 mm (12'2") |
| Hopper width | 2,805 mm (9'2"); 2,130 mm (7'0") folded |
| Hopper length | 4,365 mm (14'4") |
Performance
| Maximum travel speed | 3 km/h (1.9 mph) |
| Treatment (crushing) capacity | 100-460 ton/h (110-507 US ton/h), varies with crusher discharge setting and material — concrete debris only at the 55-100 mm setting |
| Crusher discharge setting (OSS) range | 55 mm to 200 mm (2.2 in to 7.9 in) |
| Crusher rotating speed | 210-300 rpm, variable |
| Maximum hydraulic system pressure | 380 kg/cm2 |
| Discharge conveyor belt speed | 120 m/min (393.7 ft/min) |
| Gradeability | Not published on the factory spec sheet |
Service capacities (summary)
| Fuel tank | 605 L (160 US gal) |
| Cooling system (radiator) | 43.9 L (12 US gal) |
| Engine oil | 38 L (10 US gal) |
| Hydraulic system | 370 L (98 US gal) |
| Final drive, each side | 9 L (2.4 US gal) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
BR550JG-1(S/N 1001-UP) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | 38 L (10 US gal) | Komatsu Genuine engine oil (EO). Grade by ambient temperature: EO10W-30 or EO15W-40 for standard/warm climates, EO10W for cold starts below freezing. API CH-4/CI-4 diesel engine oil service class. Powers the SAA6D125E-2 turbocharged, air-to-air aftercooled 6-cylinder diesel. |
| Cooling system (radiator + block) | 43.9 L (12 US gal) | Komatsu Super Coolant (AF-NAC), ethylene-glycol based, supplied pre-mixed 50/50 for year-round corrosion and freeze protection. Do not mix with non-genuine coolant types. |
| Fuel tank | 605 L (160 US gal) | Diesel fuel meeting ASTM specification (light oil). Use low-sulfur diesel per local emissions requirements; switch to a lighter/winter-grade fuel in cold climates to prevent waxing. |
| Final drive, each side (undercarriage travel motor reduction, x2) | 9 L (2.4 US gal) per side | Komatsu Genuine Powertrain Oil TO30. Same track undercarriage as Komatsu's hydraulic excavator line, so it carries the same final-drive spec. No separate powershift transmission on this all-hydraulic-drive machine. |
| Hydraulic system (tank + circuit — HydrauMind load-sensing, pressure-compensated) | 370 L (98 US gal) | Komatsu Genuine Super Hydraulic Oil, HO46-HM grade for normal/warm climates; HO32-HM or HO10W in cold climates for easier cold start-up and reduced pump cavitation. Feeds travel, crusher drive, feeder, main and muck conveyors, and magnetic separator circuits. |
| Grease (chassis, pins, bushings, track adjuster) | Not capacity-rated — apply per grease-point schedule | Komatsu Genuine Lithium EP Grease (G2-LI), multipurpose chassis grease. Operating range roughly -20 to +120 degrees C. Track adjuster/recoil spring cylinder uses the same grease-cylinder tensioning method common to Komatsu excavator undercarriages. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu BR550JG-1(S/N 1001-UP) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
| Every 5,000 h |
|
Servicing the BR550JG-1(S/N 1001-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
With no digital fault-code display, predictive care on the BR550JG-1(S/N 1001-UP) leans on scheduled fluid sampling and the warning-lamp/buzzer monitor. Sample engine oil from the 38L pan and hydraulic oil from the 370L tank at each scheduled interval to catch bearing and pump wear early. Pull final drive oil from each side (9L per side) to spot travel-motor or reduction-gear wear from crawler duty. Watch the air-to-air aftercooler and radiator fins for dust loading, since restricted airflow shows up as overheating before any lamp trips.
Corrective & Common Repairs
Expect jaw liner, toggle plate, and cheek plate wear from abrasive demolition debris, plus stretch and glazing on the grizzly feeder and jaw crusher V-belts. Crusher motor and vibrator bearing case oil contamination is a frequent early warning sign of an impending bearing failure. On the all-hydraulic crawler drive, travel motor and final drive seal leaks are the most common undercarriage repair. Because there is no digital trouble code, diagnosing a warning-lamp or buzzer fault means working the wiring and sensor circuit manually rather than pulling a code.
Overhaul & Rebuild Points
Major rebuild points center on the jaw crusher module: swing jaw and fixed jaw liners, toggle plate, and crusher bearing seats wear fastest and drive most overhaul decisions. The SAA6D125E-2 engine's turbocharger and valve train need periodic teardown inspection at extended hours. Because the BR550JG-1(S/N 1001-UP) has no mechanical transmission, hydraulic pump and travel/swing motor overhaul on the 370L system is the drivetrain equivalent of a transmission rebuild and should be budgeted the same way on high-hour units.
Seasonal & Environment Servicing
In cold climates, check coolant concentration ahead of winter and keep the 605L fuel tank topped to limit condensation, since this machine has no factory block heater as standard. On hot, dusty demolition sites, shorten the radiator, oil cooler, and air cleaner element service intervals to offset crushing dust loading. In wet or muddy conditions, inspect final drive seals and track components more often, as the all-hydraulic undercarriage has no sealed axle housings to fall back on. For extended idle storage, relieve tension on the jaw crusher toggle and keep the hydraulic tank filled to reduce internal condensation.
BR550JG-1(S/N 1001-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 07281-00197 | Clamp,(With Pre-Fuel Filter) | Fuel system service | Check fitment → |
| 09637-30163 | Plate? Instruction,Air Cleaner (Single Element) | Air intake service | Check fitment → |
| 09637-81163 | Plate? Instruction,Air Cleaner Element Mainte | Air intake service | Check fitment → |
| 09637-30263 | Plate? Instruction,Air Cleaner Element Mainte | Air intake service | Check fitment → |
| 07000-02080 | O-Ring,Hydraulic Oil Filter | Hydraulic service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
BR550JG-1(S/N 1001-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| E108 | Engine coolant water temperature above 105°C | Low coolant level, clogged radiator fins, weak or slipping fan belt, faulty thermostat, or coolant temperature sensor fault | Stop machine, let engine cool, check coolant level and radiator for debris/clogging, check fan belt tension, inspect thermostat before restart |
| E104 | Air filter (intake) clogged or restricted | Dust/debris buildup in the pre-cleaner and filter element from crusher dust environment | Inspect and clean or replace air filter element and pre-cleaner cup, check for damaged seals |
| E11 (CA2249) | Common rail fuel pressure very low | Fuel starvation from a clogged fuel filter, restricted fuel line, air in the fuel system, or a failing supply/high-pressure pump | Check fuel level and lines for restriction, replace fuel filters, bleed air from the fuel system, inspect rail pressure sensor wiring |
| E226 | Pressure sensor circuit power supply abnormal | Damaged sensor wiring, loose or corroded connector, or failed sensor power supply within the engine controller circuit | Inspect sensor harness and connectors for damage or corrosion, check sensor supply voltage, repair or replace as needed |
| E227 | Engine speed sensor signal abnormal | Damaged or misaligned crank/cam speed sensor, broken wiring, or debris on the sensor tip | Inspect speed sensor wiring and connector, check sensor gap/mounting, clean or replace sensor if signal remains erratic |
| CA1633 | Datalink communication timeout between controllers | Damaged CAN/datalink wiring harness, loose connector, or a controller not powering up correctly | Inspect datalink harness and connectors between engine and machine controllers, check controller power and ground, reseat connectors |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
BR550JG-1(S/N 1001-UP) attachments & work tools
Jaw crusher module
Fitted with Komatsu's maximum-capacity bow-type fixed jaw (FS4430QA class), inlet opening about 1120 x 765 mm (44 x 30 in). Discharge (closed/open side) setting is adjustable roughly 55-200 mm (2.2-7.9 in) via a one-touch hydraulic wedge adjustment, no tools or shims needed. Jaw speed is variable, about 210-300 rpm, tuned to feed material and wear-plate condition.
Vibrating grizzly feeder
Standard heavy-duty vibrating grizzly feeder pre-screens fines ahead of the jaw to protect crushing surfaces and lift throughput. Feeder speed and stroke are hydraulically controlled from the same power pack as the crusher; no separate power unit needed.
Main/discharge conveyor
Crushed product discharges onto a wide main conveyor, on the order of 1000-1070 mm (about 41-42 in) belt width on units of this class, feeding a stockpile or a following screen/loadout. Conveyor is hydraulically driven off the same circuit as the crusher, foldable for transport.
Magnetic separator (option)
Overband magnetic separator mounts above the discharge conveyor to pull rebar and tramp steel out of crushed rubble before stockpiling. Sold as a factory or dealer-fit option connected into the machine's onboard hydraulic outlets; not standard on the base configuration.
Lateral (side) discharge conveyor (option)
An optional lateral unload conveyor swings off to the side of the main discharge run to separate fines or build a windrow stockpile away from the main product pile. Runs off the same auxiliary hydraulic outlets provided in the chassis for optional equipment.
Auxiliary hydraulic outlets for work tools
The chassis is built with dedicated hydraulic outlets so optional equipment (magnetic separator, side conveyor, dust suppression pump, etc.) can be plumbed in without a separate power source. This is the mounting/interface standard for this class of Komatsu mobile crusher rather than a quick-coupler bracket system, since attachments are fixed installs, not swap tools.
Dust suppression system
Standard water spray/sprinkler nozzles at the crusher inlet and discharge points knock down dust during operation. Water supply is typically owner-fitted (tank and pump) and tied into the same control panel used to run the crusher, feeder, and conveyors.
Undercarriage and travel system
Self-propelled crawler undercarriage lets the unit reposition on site and load onto a trailer without a separate carrier or crane; radio remote or console travel control is typical for this crusher class, letting one operator run tracking and crushing functions from a single station.
Guarding and access options
Factory safety guarding covers the jaw, feeder, and conveyor drive/return points as standard for this crusher class; walkways and service platforms around the crusher and engine deck support routine wear-plate and belt maintenance. Exact platform/guard configuration can vary by market and dealer-fit package.
All BR550JG-1(S/N 1001-UP) assemblies by section
Every catalogued assembly group for the Komatsu BR550JG-1(S/N 1001-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Accessory
Komatsu : Br550jg-1(S/N 1001-Up) : Accessory : Tool (For Crusher)
| 04***18 | Bolt,(With Main Clutch Cooler) (D60p) | 1 |
| 04***30 | Bolt, Lifting Eye | 2 |
| 82***80 | Wrench | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Accessory : Tool (For Machine Maintenance)
| 07***03 | Cartridge - Grease | 1 |
| 07***00 | Nozzle,(For Rubber Shoe) | 1 |
| 07***03 | Pump Assembly, Grease | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Accessory : Tool (For Shipping)
| 82***10 | Rope,Rope | 2 |
| 82***20 | Rope,Rope | 1 |
| 82***30 | Shackle | 3 |
Control System
Komatsu : Br550jg-1(S/N 1001-Up) : Control System : Control Panel Wiring (1/4)
| 01***16 | Bolt - Box Mounting | 2 |
| 01***10 | Screw,(Without Radio) | 4 |
| 01***16 | Screw | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Control System : Control Panel Wiring (2/4)
| 01***10 | Bolt,(With Auto Emergency Steering) | 1 |
| 01***12 | Bolt - Front Cover Mounting | 8 |
| 01***16 | Bolt - Box Mounting | 15 |
Komatsu : Br550jg-1(S/N 1001-Up) : Control System : Control Panel Wiring (3/4)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 18 |
| 01***14 | Screw | 1 |
| 01***20 | Screw, Machine | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Control System : Control Panel Wiring (4/4)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***10 | Screw,(Without Radio) | 3 |
| 01***12 | Screw,Sems | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Control System : Frame Piping (1/3)
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 8 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Control System : Frame Piping (2/3)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 2 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 6 |
Komatsu : Br550jg-1(S/N 1001-Up) : Control System : Frame Piping (3/3)
| 01***25 | Bolt,(Rear Attachment Less) | 4 |
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
Komatsu : Br550jg-1(S/N 1001-Up) : Control System : Monitor Panel
| 78***10 | Bulb - 1.4 Watt | 2 |
| 78***02 | Monitor | 1 |
| 78***20 | Holder, Bulb | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Control System : Ppc Travel Lines (1/2)
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 2 |
| 07***05 | Hose | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Control System : Ppc Travel Lines (2/2)
| 01***75 | Bolt - Tube Mounting | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
| 07***18 | O-Ring,(See Fig.1601-29?1602-17) | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Control System : Ppc Work Lines (1/3)
| 07***08 | Hose | 1 |
| 07***09 | Hose | 1 |
| 07***11 | Hose | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Control System : Ppc Work Lines (2/3)
| 07***05 | Hose | 1 |
| 07***09 | Hose | 1 |
| 07***14 | Hose | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Control System : Ppc Work Lines (3/3)
| 01***60 | Bolt,(F4320-52a0 -5- ) | 2 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 7 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Control System : Radio Control And Beacon Lamp (For Eu?Australia)
| 01***35 | Bolt | 4 |
| 01***23 | Washer,(With Auto Emergency Steering) | 4 |
| 08***10 | Connector | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Control System : Radio Control And Beacon Lamp (For Uk)
| 01***35 | Bolt | 4 |
| 01***23 | Washer,(With Auto Emergency Steering) | 4 |
| 08***10 | Connector | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Control System : Radio Control And Beacon Lamp (For Usa)
| 01***35 | Bolt | 4 |
| 01***23 | Washer,(With Auto Emergency Steering) | 4 |
| 08***10 | Connector | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Control System : Travel Control Lever
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***30 | Bolt,(With Body Positioner) | 4 |
Cooling System
Komatsu : Br550jg-1(S/N 1001-Up) : Cooling System : Cooling (After Cooler Piping)
| 01***30 | Bolt,Radio Controlled Slag Handling | 3 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Cooling System : Cooling (Drain)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Cooling System : Cooling (Guard)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 3 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 3 |
| 20***20 | Guard | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Cooling System : Cooling (Radiator And Oil Cooler)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(With Body Positioner) | 13 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 32 |
Komatsu : Br550jg-1(S/N 1001-Up) : Cooling System : Cooling (Radiator Mounting And Sheet)
| 01***30 | Bolt,(Not Used When Towing Winch) | 4 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 2 |
| 01***70 | Bolt - Accumulator Mounting Bracket | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Cooling System : Cooling (Radiator Piping)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 4 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Cooling System : Fan Guard
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 5 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 5 |
| 20***30 | Cover | 1 |
Electrical System
Komatsu : Br550jg-1(S/N 1001-Up) : Electrical System : Battery
| 01***32 | Washer,(Not Used With Emergency Str.) | 2 |
| 08***35 | Cable | 1 |
| 08***11 | Cap,(-) Terminal | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Electrical System : Electrical System (1/9)
| 01***20 | Bolt,(For Mono Lever Steering) | 8 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 9 |
| 01***65 | Bolt,(Used With Pin Puller) | 3 |
Komatsu : Br550jg-1(S/N 1001-Up) : Electrical System : Electrical System (2/9)
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 12 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 18 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 30 |
Komatsu : Br550jg-1(S/N 1001-Up) : Electrical System : Electrical System (3/9)
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 23 |
| 01***20 | Screw | 12 |
Komatsu : Br550jg-1(S/N 1001-Up) : Electrical System : Electrical System (4/9)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 4 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 6 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 6 |
Komatsu : Br550jg-1(S/N 1001-Up) : Electrical System : Electrical System (5/9)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 6 |
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Electrical System : Electrical System (6/9)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 9 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 15 |
Komatsu : Br550jg-1(S/N 1001-Up) : Electrical System : Electrical System (7/9)
| 01***20 | Bolt,(For Mono Lever Steering) | 5 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 15 |
Komatsu : Br550jg-1(S/N 1001-Up) : Electrical System : Electrical System (8/9)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***65 | Bolt - Return Line And Suction Linehose Clamps | 1 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Electrical System : Electrical System (9/9)
| 01***30 | Bolt - M8 X 30lg | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 3 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 47 |
Komatsu : Br550jg-1(S/N 1001-Up) : Electrical System : Horn
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 8 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 8 |
| 08***00 | Horn,High | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Electrical System : Switch
| 01***20 | Bolt | 3 |
| 01***06 | Screw | 1 |
| 01***02 | Nut | 1 |
Engine Related Parts
Komatsu : Br550jg-1(S/N 1001-Up) : Engine Related Parts : Air Clearner Conection
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 5 |
| 01***10 | Nut,(Dust?Drip Proof? Trimming S.) | 1 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 5 |
Komatsu : Br550jg-1(S/N 1001-Up) : Engine Related Parts : Damper
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 8 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 8 |
| 20***10 | Damper,Disk | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Engine Related Parts : Engine Mounting
| 01***40 | Bolt (Op) | 2 |
| 01***90 | Capscrew | 6 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 3 |
Komatsu : Br550jg-1(S/N 1001-Up) : Engine Related Parts : Fuel Control
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(With Body Positioner) | 1 |
Fuel Tank And Related Parts
Komatsu : Br550jg-1(S/N 1001-Up) : Fuel Tank And Related Parts : Fuel Lines
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 3 |
| 01***60 | Bolt,For Weight Adjusting Bolt | 3 |
Komatsu : Br550jg-1(S/N 1001-Up) : Fuel Tank And Related Parts : Fuel Tank
| 01***12 | Bolt - Front Cover Mounting | 4 |
| 01***35 | Bolt,(With Rops) | 6 |
| 01***23 | Washer,(With Auto Emergency Steering) | 4 |
Guard
Komatsu : Br550jg-1(S/N 1001-Up) : Guard : Battery Box
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 9 |
| 01***23 | Washer,(With Auto Emergency Steering) | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Guard : Cover (L.H. Side)
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 13 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 3 |
| 01***30 | Bolt - Pin Mounting | 5 |
Komatsu : Br550jg-1(S/N 1001-Up) : Guard : Cover (R.H. Side)
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 13 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 9 |
| 01***30 | Bolt - Pin Mounting | 5 |
Komatsu : Br550jg-1(S/N 1001-Up) : Guard : Cover (Upper) (Machine Cab) (1/2)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Guard : Cover (Upper) (Machine Cab) (2/2)
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 6 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 21 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 13 |
Komatsu : Br550jg-1(S/N 1001-Up) : Guard : Crusher Cover
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 8 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 8 |
| 01***50 | Bolt,For Weight Adjusting Bolt | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Guard : Floor
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 6 |
| 01***55 | Bolt - Mount Cage To Transmission Case | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Guard : Frame
| 01***30 | Bolt,(Not Used When Towing Winch) | 14 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 2 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 14 |
Komatsu : Br550jg-1(S/N 1001-Up) : Guard : Hood
| 01***30 | Bolt,(Not Used When Towing Winch) | 18 |
| 01***13 | Nut,(For Adjustable Rod) | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 14 |
Komatsu : Br550jg-1(S/N 1001-Up) : Guard : L.H.Side Door
| 01***12 | Bolt - Front Cover Mounting | 2 |
| 01***16 | Bolt - Box Mounting | 2 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 24 |
Komatsu : Br550jg-1(S/N 1001-Up) : Guard : Mirror
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 6 |
| 01***09 | Nut,(For Japan) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Guard : Partition (1/2)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 1 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 27 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Guard : Partition (2/2)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 8 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 9 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 8 |
Komatsu : Br550jg-1(S/N 1001-Up) : Guard : R.H.Side Door
| 01***12 | Bolt - Front Cover Mounting | 2 |
| 01***16 | Bolt - Box Mounting | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 8 |
Komatsu : Br550jg-1(S/N 1001-Up) : Guard : Rear Cover
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 2 |
| 01***45 | Bolt, Mounting Cranking Motor | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Guard : Step
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Guard : Under Cover
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 3 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 46 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 6 |
Hydraulic System And Piping
Komatsu : Br550jg-1(S/N 1001-Up) : Hydraulic System And Piping : Conveyor Lines (1/4)
| 01***65 | Bolt,(Used With Pin Puller) | 2 |
| 01***70 | Bolt - Accumulator Mounting Bracket | 4 |
| 01***50 | Bolt | 8 |
Komatsu : Br550jg-1(S/N 1001-Up) : Hydraulic System And Piping : Conveyor Lines (2/4)
| 01***30 | Bolt,(Not Used When Towing Winch) | 12 |
| 01***65 | Bolt,(Used With Pin Puller) | 6 |
| 01***50 | Bolt | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Hydraulic System And Piping : Conveyor Lines (3/4)
| 01***35 | Capscrew | 1 |
| 01***25 | Screw | 4 |
| 01***50 | Bolt | 16 |
Komatsu : Br550jg-1(S/N 1001-Up) : Hydraulic System And Piping : Conveyor Lines (4/4)
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 1 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 1 |
| 07***14 | Hose | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Hydraulic System And Piping : Crusher Lines (1/2)
| 01***85 | Bolt | 6 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 8 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 14 |
Komatsu : Br550jg-1(S/N 1001-Up) : Hydraulic System And Piping : Crusher Lines (2/2)
| 01***70 | Bolt - Accumulator Mounting Bracket | 2 |
| 01***75 | Bolt - Tube Mounting | 2 |
| 01***08 | Nut (Op) | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Hydraulic System And Piping : Delivery Line
| 01***35 | Capscrew | 8 |
| 01***32 | Washer,(With 150mm Spill Guard) | 8 |
| 01***32 | Washer,(With Auto Emergency Steering) | 8 |
Komatsu : Br550jg-1(S/N 1001-Up) : Hydraulic System And Piping : Drain Lines (1/2)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***70 | Bolt - Accumulator Mounting Bracket | 2 |
| 01***80 | Bolt,For Weight Adjusting Bolt | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Hydraulic System And Piping : Drain Lines (2/2)
| 01***60 | Bolt,(F4320-52a0 -5- ) | 2 |
| 01***80 | Bolt,(With Corrosion Resistor) | 2 |
| 01***12 | Nut | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Hydraulic System And Piping : Feeder Lines
| 01***75 | Bolt - Tube Mounting | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
| 01***32 | Washer, (Without Emergency Steering) | 16 |
Komatsu : Br550jg-1(S/N 1001-Up) : Hydraulic System And Piping : Hopper Cylinder Lines
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 6 |
Komatsu : Br550jg-1(S/N 1001-Up) : Hydraulic System And Piping : Hydraulic Tank (1/2)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Hydraulic System And Piping : Hydraulic Tank (2/2)
| 01***30 | Bolt,(Not Used When Towing Winch) | 7 |
| 01***90 | Bolt,For Weight Adjusting Bolt | 2 |
| 01***35 | Bolt,(With Rops) | 6 |
Komatsu : Br550jg-1(S/N 1001-Up) : Hydraulic System And Piping : Ls Lines (1/2)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 1 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 2 |
| 01***50 | Bolt,For Weight Adjusting Bolt | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Hydraulic System And Piping : Ls Lines (2/2)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 1 |
| 01***65 | Bolt,(Used With Pin Puller) | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Hydraulic System And Piping : Main Pump
| 01***40 | Bolt,For Weight Adjusting Bolt | 12 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 12 |
| 07***23 | O-Ring,(F4350-65a0 -16 ) | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Hydraulic System And Piping : Main Valve
| 01***30 | Bolt,(Not Used When Towing Winch) | 4 |
| 01***50 | Bolt,(For D60pl) | 3 |
| 01***60 | Capscrew | 6 |
Komatsu : Br550jg-1(S/N 1001-Up) : Hydraulic System And Piping : Oil Cooler Lines
| 01***30 | Bolt,(Not Used When Towing Winch) | 2 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 14 |
| 01***85 | Bolt,(Used With Pin Puller) | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Hydraulic System And Piping : Ppc Valve
| 01***95 | Bolt | 6 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***25 | Capscrew | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Hydraulic System And Piping : Return Lines
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 2 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 8 |
| 01***75 | Bolt - Tube Mounting | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Hydraulic System And Piping : Solenoid Valve (1/2)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 10 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Hydraulic System And Piping : Solenoid Valve (2/2)
| 01***35 | Bolt,(F4320-52a0 -5 ) | 3 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 4 |
| 01***12 | Nut | 3 |
Komatsu : Br550jg-1(S/N 1001-Up) : Hydraulic System And Piping : Suction Line
| 01***40 | Bolt,For Weight Adjusting Bolt | 4 |
| 01***55 | Bolt - Mount Cage To Transmission Case | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 8 |
Komatsu : Br550jg-1(S/N 1001-Up) : Hydraulic System And Piping : Travel Lines
| 01***75 | Bolt - Tube Mounting | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
| 01***32 | Washer, (Without Emergency Steering) | 32 |
Main Frame And Related Parts
Komatsu : Br550jg-1(S/N 1001-Up) : Main Frame And Related Parts : Main Frame
| 01***65 | Bolt,(Without Rops Guard? Canopy) | 12 |
| 01***75 | Bolt (Kit) | 10 |
| 01***60 | Washer,(Without Rops Guard? Canopy) | 22 |
Marks And Plates
Komatsu : Br550jg-1(S/N 1001-Up) : Marks And Plates : Decal Plates (Side Conveyor) (English) (For Ec?Asian?African And Middle-Easten Countries)
| 09***41 | Plate? Safety,Crusher V-Belts Inspection War | 2 |
| 09***21 | Plate,Keep Off Around Conveyor | 2 |
| 82***31 | Plate,Emergency Stop Switch | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Marks And Plates : Decal Plates (Side Conveyor) (English) (For Usa?Puerto Rico?Aust -Ralia And Central-South American)
| 82***31 | Plate,Emergency Stop Switch | 2 |
| 82***31 | Plate,Conveyor Inspection Warning | 2 |
| 82***60 | Plate,(English) (For Usa? Canada) | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Marks And Plates : Decal Plates (Side Conveyor) (German)
| 09***41 | Plate? Safety,Crusher V-Belts Inspection War | 2 |
| 09***21 | Plate,Keep Off Around Conveyor | 2 |
| 82***51 | Plate,Emergency Stop Switch | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Marks And Plates : Mark And Plates (English) (Asian?African And Middle-Easten Countr Ies)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***63 | Plate? Instruction,Air Cleaner (Single Element) | 1 |
| 09***12 | Plate? Instruction,Instruction?Stopping Engine | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Marks And Plates : Mark And Plates (English) (Australia?Central And South American Countries)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***63 | Plate? Instruction,Air Cleaner (Single Element) | 1 |
| 09***12 | Plate? Instruction,Instruction?Stopping Engine | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Marks And Plates : Mark And Plates (English) (European Countries)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***00 | Plate? Name,Machine Model (For Ec Reg.) | 1 |
| 09***63 | Plate? Instruction,Air Cleaner (Single Element) | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Marks And Plates : Mark And Plates (English) (Usa?Puerto Rico)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***63 | Plate? Instruction,Air Cleaner (Single Element) | 1 |
| 09***12 | Plate? Instruction,Instruction?Stopping Engine | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Marks And Plates : Mark And Plates (German)
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***63 | Plate? Instruction,Air Cleaner Element Mainte | 1 |
| 09***12 | Plate? Instruction,Instruction?Stopping Engine | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Marks And Plates : Marks And Plates (French))
| 04***60 | Screw,Machine Model (For Ec Reg.) | 4 |
| 09***63 | Plate? Instruction,Air Cleaner Element Mainte | 1 |
| 09***12 | Plate? Instruction,Stopping The Engine | 1 |
Service Kit And Component Parts
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Conveyor Cylinder (Inner Parts)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 1 |
| 01***18 | Nut | 1 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Conveyor Motor (Inner Parts)
| 82***00 | Motor | 1 |
| ST***1S | Service Kit,Hydraulic Motor | 1 |
| ST***0S | Service Kit,Motor Rear | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Hopper Cylinder (Inner Parts)
| 01***22 | Nut,(North America Spec.) | 1 |
| 07***65 | O-Ring,(F5350-62a0 -14 ) | 2 |
| 07***70 | O-Ring (Kit) | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Pump (1/11)
| 04***22 | Bolt,Eye | 1 |
| 07***12 | Plug,Magnetic | 1 |
| 70***10 | O-Ring | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Pump (10/11)
| 07***10 | O-Ring | 1 |
| 70***20 | O-Ring | 2 |
| 70***80 | Filter | 3 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Pump (11/11)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***25 | Screw | 4 |
| 01***65 | Screw | 8 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Pump (2/11)
| 04***25 | Ring,Snap | 1 |
| 70***11 | Seal,Oil | 1 |
| 70***60 | Spacer | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Pump (3/11)
| (****0) | Guide,Retainer | 1 |
| (****0) | Cylinder Block Ass'Y | 1 |
| (****0) | Seat | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Pump (4/11)
| 70***10 | O-Ring | 1 |
| 70***50 | Screw | 6 |
| 70***30 | Plug | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Pump (5/11)
| 04***22 | Bolt,Eye | 1 |
| 07***12 | Plug,Magnetic | 1 |
| 20***10 | Bleeder | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Pump (6/11)
| (****0) | Guide,Retainer | 1 |
| (****0) | Seat | 1 |
| (7***0) | Pump Ass'Y | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Pump (7/11)
| 70***30 | Plug | 2 |
| 70***40 | Spring | 2 |
| (****0) | O-Ring | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Pump (8/11)
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 2 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 2 |
| (****0) | Bushing | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Pump (9/11)
| 70***20 | Servo Valve Ass'Y | 2 |
| (****5) | Nut | 1 |
| (****1) | Solenoid Ass'Y | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Valve (3-Actuator) (1/15)
| 01***20 | Bolt | 24 |
| 07***23 | O-Ring; Was 07002-10823, O-Ring,(Not Shown) | 12 |
| 07***80 | O-Ring | 12 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Valve (3-Actuator) (10/15)
| 01***60 | Capscrew | 4 |
| 01***30 | Bolt (Itl) | 2 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Valve (3-Actuator) (11/15)
| 01***20 | Bolt | 4 |
| 07***09 | O-Ring,(For Dual Tilt Dozer) | 2 |
| 07***15 | O-Ring,Regulator Valve | 3 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Valve (3-Actuator) (12/15)
| 01***45 | Bolt | 4 |
| 01***23 | Washer,(For Shipping) | 4 |
| 07***34 | O-Ring,See Fig. K4010-65a0 | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Valve (3-Actuator) (13/15)
| 01***20 | Bolt | 4 |
| 07***09 | O-Ring,(For Dual Tilt Dozer) | 2 |
| 07***15 | O-Ring,Regulator Valve | 3 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Valve (3-Actuator) (14/15)
| 01***45 | Bolt | 4 |
| 01***23 | Washer,(For Shipping) | 4 |
| 07***34 | O-Ring,See Fig. K4010-65a0 | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Valve (3-Actuator) (15/15)
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Valve (3-Actuator) (2/15)
| 01***40 | Bolt (Op) | 4 |
| 01***65 | Screw | 4 |
| 01***32 | Washer, (Without Emergency Steering) | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Valve (3-Actuator) (3/15)
| 07***34 | O-Ring,See Fig. K4010-65a0 | 3 |
| 70***20 | O-Ring | 3 |
| 72***00 | Valve Ass'Y | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Valve (3-Actuator) (4/15)
| 01***90 | Bolt,(Without Cab) | 4 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 10 |
| 07***07 | O-Ring - (K10) | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Valve (3-Actuator) (5/15)
| 07***14 | O-Ring,(F4350-61a0a-20 ) | 1 |
| 07***16 | O-Ring,Suction And Relief Valve | 1 |
| 07***14 | Ring,Back-Up (Kit), Ring,Back-Up; Komatsu S/N 20501-22940 - Was 07001-02014 | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Valve (3-Actuator) (6/15)
| 07***34 | O-Ring,(For 2-Actuater Attachment) | 1 |
| 70***10 | O-Ring (Kit) | 1 |
| 70***20 | Ring, Back-Up | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Valve (3-Actuator) (7/15)
| 01***50 | Bolt | 14 |
| 01***32 | Washer, (Without Emergency Steering) | 14 |
| 07***20 | O-Ring,(0202-007) | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Valve (3-Actuator) (8/15)
| 07***09 | O-Ring,(For Dual Tilt Dozer) | 2 |
| 07***24 | O-Ring | 2 |
| 07***09 | Ring,Back-Up (Kit) | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Main Valve (3-Actuator) (9/15)
| 07***34 | O-Ring,See Fig. K4010-65a0 | 2 |
| 07***12 | Plug,Oil Filler | 1 |
| 70***00 | Valve Ass'Y,Suction And Safety | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Pilot Valve
| 01***20 | Bolt | 3 |
| 01***20 | Bolt | 4 |
| 01***25 | Screw | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Ppc Valve (For Travel)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 4 |
| 01***55 | Screw | 2 |
| 01***12 | Screw | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Side Conveyor Cylinder (Inner Parts)
| 01***15 | Nut,(For Slag Handling) | 1 |
| 07***48 | O-Ring,(F4350-64a0 -21 ) | 1 |
| 07***45 | O-Ring,(F4350-60a0 -9 ) | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Travel Motor (1/3)
| 07***18 | O-Ring, Divider Valve Mounting | 2 |
| 07***18 | Ring, Back-Up | 2 |
| 07***23 | O-Ring,(F4350-66a1 -1c ) | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Travel Motor (2/3)
| 04***25 | Ring,Snap | 1 |
| 07***34 | O-Ring,(For Front Attachment) | 1 |
| 70***81 | Seal,Oil | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Service Kit And Component Parts : Travel Motor (3/3)
| 07***21 | O-Ring (Kit) | 1 |
| 07***18 | O-Ring (Kit) | 1 |
| 07***18 | Ring, Back-Up | 2 |
Travel And Lower Piping
Komatsu : Br550jg-1(S/N 1001-Up) : Travel And Lower Piping : Final Drive
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***30 | Bolt,(With Body Positioner) | 32 |
| 01***40 | Bolt,(For Slag Handling) (For Usa) | 12 |
Komatsu : Br550jg-1(S/N 1001-Up) : Travel And Lower Piping : Travel Piping
| 01***65 | Bolt,(Used With Pin Puller) | 6 |
| 01***75 | Bolt - Tube Mounting | 12 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 18 |
Under Carriage
Komatsu : Br550jg-1(S/N 1001-Up) : Under Carriage : Carrier Roller
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***00 | Bolt,(For 27.00-49) | 8 |
| 01***60 | Flat Washer - M20 (Hardened) | 8 |
Komatsu : Br550jg-1(S/N 1001-Up) : Under Carriage : Front Idler
| 07***75 | O-Ring,Steering Oil Filter | 2 |
| 07***34 | O-Ring,Transmission And Steering Case | 1 |
| 07***18 | Plug,(Without Alarm Device) | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Under Carriage : Idler Cushion
| 01***75 | Capscrew (4) (Qty.3 (5)) | 8 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Under Carriage : Track Frame And Track Roller
| 01***40 | Bolt,(For Slag Handling) (For Usa) | 8 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 8 |
| 01***60 | Flat Washer - M20 (Hardened) | 40 |
Komatsu : Br550jg-1(S/N 1001-Up) : Under Carriage : Track Shoe (Triple Grouser With Hole)
| 14***40 | Seal,Dust? Regular? W-Type | 172 |
| 20***01 | Track Shoe Ass'Y | 1 |
| 20***40 | Bushing? Regular,Regular | 86 |
Work Equipment
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Chuter (1/2)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 10 |
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 16 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Chuter (2/2)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 13 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 8 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 6 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Conveyor (Inner Parts) (Bracket)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 30 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 24 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 8 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Conveyor (Inner Parts) (Cover)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 38 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 17 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 55 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Conveyor (Inner Parts) (Frame Cover)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 41 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 40 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 36 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Conveyor (Inner Parts) (Frame)
| 01***30 | Bolt,(Not Used When Towing Winch) | 6 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 40 |
| 01***45 | Bolt,(For 60ton Dump Body) | 40 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Conveyor (Inner Parts) (Guard)
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***30 | Bolt,(With Body Positioner) | 8 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 8 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Conveyor (Inner Parts) (Motor)
| 01***55 | Bolt,(Not Used For Chip Dozer) | 12 |
| 01***12 | Nut | 2 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 12 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Conveyor (Inner Parts) (Piping)
| 01***20 | Bolt,(For Mono Lever Steering) | 23 |
| 01***70 | Bolt - Accumulator Mounting Bracket | 8 |
| 01***10 | Nut,(Without Air Conditioner) | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Conveyor (Inner Parts) (Pully And Cleaner)
| 01***65 | Bolt,(Without Rops) | 4 |
| 01***80 | Capscrew | 4 |
| 01***25 | Bolt, Seal Cover Mounting | 6 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Conveyor (Inner Parts) (Pully And Scraper)
| 01***30 | Bolt,(Not Used When Towing Winch) | 2 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 8 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 10 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Conveyor (Inner Parts) (Roller)
| 01***14 | Screw | 16 |
| 01***16 | Bolt - Box Mounting | 24 |
| 01***16 | Bolt - Seat And Tether Belt Mounting | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Conveyor Bracket (1/2)
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***45 | Bolt,(For 60ton Dump Body) | 20 |
| 01***55 | Bolt,(Without Rops) | 8 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Conveyor Bracket (2/2)
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 5 |
| 01***50 | Bolt,For Weight Adjusting Bolt | 5 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Conveyor Machinery (Inner Parts)
| 04***38 | Pin, Dowel | 2 |
| 04***20 | Ring, Retaining | 1 |
| 07***80 | O-Ring,Hydraulic Oil Filter | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Crusher Guard
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 4 |
| 01***50 | Bolt,(For Large Size Tire) | 8 |
| 01***80 | Bolt | 8 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Crusher Motor
| 01***90 | Bolt,For Weight Adjusting Bolt | 8 |
| 01***60 | Bolt | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 8 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Crusher Motor Mounting Parts
| 01***30 | Bolt,(With Body Positioner) | 8 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 1 |
| 01***80 | Screw | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Grizzly Bar
| 01***95 | Bolt,Leaning Lock | 24 |
| 01***35 | Bolt | 24 |
| 01***60 | Washer,(Without Rops Guard? Canopy) | 24 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Grizzly Feeder
| 01***65 | Bolt,(Used With Pin Puller) | 2 |
| 01***70 | Bolt,(With Wear Guard) | 2 |
| 01***10 | Nut,(Without Air Conditioner) | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Holding Hopper (1/2)
| 01***20 | Bolt,(Without Air Con. Or Heater) | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 16 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 10 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Holding Hopper (2/2)
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 22 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 26 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Hopper
| 01***75 | Bolt (Kit) | 24 |
| 01***60 | Washer,(Without Rops Guard? Canopy) | 24 |
| 82***11 | Hopper | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Hopper Frame
| 01***70 | Capscrew - M24 | 16 |
| 01***60 | Washer,(Without Rops Guard? Canopy) | 16 |
| 82***11 | Frame | 1 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Hopper Frame (Holding Hopper)
| 01***70 | Capscrew - M24 | 16 |
| 01***60 | Washer,(Without Rops Guard? Canopy) | 16 |
| 82***70 | Shim | 12 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Jaw Crusher
| 01***50 | Bolt,(For D60pl) | 8 |
| 01***25 | Bolt | 6 |
| 01***75 | Bolt | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Jaw Crusher (Inner Parts) (1/4)
| 01***19 | Nut - M24 | 14 |
| 01***60 | Washer,(Without Rops Guard? Canopy) | 6 |
| 82***30 | Bolt | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Jaw Crusher (Inner Parts) (2/4)
| 01***30 | Bolt,(Not Used When Towing Winch) | 2 |
| 01***65 | Capscrew - M16 X 2.00 X 90 | 16 |
| 01***75 | Capscrew | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Jaw Crusher (Inner Parts) (3/4)
| 01***55 | Bolt,(Not Used For Chip Dozer) | 16 |
| 01***10 | Capscrew | 8 |
| 01***30 | Screw | 8 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Jaw Crusher (Inner Parts) (4/4)
| 82***10 | Elbow,Grease | 4 |
| 82***20 | Union,Grease | 2 |
| 82***30 | Connector,Grease | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Magnet Separator
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 8 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 8 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 8 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Side Conveyor (1/9) (Conveyor Frame)
| 01***20 | Bolt,(For Mono Lever Steering) | 6 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 2 |
| 01***80 | Bolt,For Weight Adjusting Bolt | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Side Conveyor (2/9) (Conveyor Skirt)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 40 |
| 01***30 | Bolt,(With Body Positioner) | 40 |
| 01***32 | Washer,(With Auto Emergency Steering) | 80 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Side Conveyor (3/9) (Tail Pulley)
| 01***25 | Capscrew | 6 |
| 01***25 | Bolt,(Rear Attachment Less) | 4 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Side Conveyor (4/9) (Head Pulley)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Side Conveyor (5/9) (Roller)
| 01***10 | Bolt,(With Auto Emergency Steering) | 27 |
| 01***20 | Bolt,(For Mono Lever Steering) | 8 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 46 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Side Conveyor (6/9) (Scraper And Guard)
| 01***20 | Bolt,(For Mono Lever Steering) | 14 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 10 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 12 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Side Conveyor (7/9) (Motor?Hose?Emergency Switch And Wiring)
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 10 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Side Conveyor (8/9) (Mounting Parts And Cylinder)
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Side Conveyor (9/9) (Hose)
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 3 |
| 01***55 | Bolt - Mount Cage To Transmission Case | 3 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Sprinkler
| 01***30 | Bolt,(Not Used When Towing Winch) | 2 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 2 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 2 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Vibrator (1/3)
| 01***30 | Bolt,(Not Used When Towing Winch) | 52 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 16 |
| 01***00 | Capscrew | 5 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Vibrator (2/3)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 8 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 26 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 4 |
Komatsu : Br550jg-1(S/N 1001-Up) : Work Equipment : Vibrator (3/3)
| 01***10 | Bolt | 16 |
| 20***30 | Washer | 16 |
BR550JG-1(S/N 1001-UP) serial number reference
On the BR550JG-1, the machine identification (PIN) plate is mounted at the rear of the frame, on the right-hand side. A separate engine serial plate sits on the side of the cylinder head cover, under the intake/suction manifold - use that one when ordering engine-specific parts. Komatsu does not stamp a 3-character alpha prefix ahead of the number on this model; the plate reads the model name (BR550JG-1) followed by a plain numeric serial, and that number is checked against the manual's stated range (1001-and-up) to confirm which parts book or shop manual applies.
| Prefix | Identifies | Notes |
|---|---|---|
| 1001-UP | BR550JG-1 base range (plain numeric serial, no 3-character alpha prefix) | Komatsu parts and operation manuals list this mobile crusher as applicable from S/N 1001-UP; one operation and maintenance manual footprint for this same model line cites 1067-and-up as its applicability line, so treat 1067 as a documented running-change point within the 1001-UP range rather than a separate range. No letter-code PIN prefix (Cat-style 3-character prefix) applies to this model - Komatsu mobile crushers of this era carry a plain numeric serial under the model name. Engine fitted across the range is the SAA6D125E-2, factory rated about 228 kW (306 hp) at 1950 rpm, air-to-air aftercooled, without the added emission hardware used on the newer SAA6D125E-5 fitted to the later BR580JG-1 - do not carry that later engine's data onto this range. No separate plant-code or configuration-variant split (regional build or JG-vs-other suffix) turned up tied to this serial range - confirm any regional split with your dealer if it matters for parts fitment. |
Frequently asked questions
What engine does the Komatsu BR550JG-1(S/N 1001-UP) use?
A Komatsu SAA6D125E-2, a six-cylinder, turbocharged, air-to-air aftercooled diesel of 11.04L displacement, rated 228 kW (306 HP) at 1950 rpm.
What is the operating weight of the Komatsu BR550JG-1(S/N 1001-UP)?
47,500 kg (104,720 lb) with standard 500mm shoes; actual weight varies slightly with fitted options such as a magnetic separator or side conveyor.
What replaced the Komatsu BR550JG-1(S/N 1001-UP)?
The Komatsu BR580JG-1, a larger high-end mobile jaw crusher powered by a Tier III SAA6D125E-5 engine rated near 263 kW (353 HP) with an operating weight of roughly 49,000-51,000 kg (108,000-112,440 lb).
What BR550JG-1(S/N 1001-UP) owners discuss
How does the all-hydraulic drive on the BR550JG-1 actually perform in day-to-day use?
The hydraulic travel and swing systems reposition the machine smoothly within a working pad, but true walk-behind-the-excavator mobility often falls short of the brochure promise. Crawling over broken rock and debris on an uneven pit floor tends to bend or damage the discharge conveyor tail drum, so many crews end up parking the crusher in one spot and feeding it rather than relocating it constantly. Budget for conveyor guard and tail-drum inspection if the machine has worked loose, rocky ground.
What undercarriage wear should I expect on this class of crawler crusher?
The BR550JG-1 rides on the same crawler undercarriage used on Komatsu excavators in this weight class, so it wears the same way: track shoes, rollers, idlers, and sprockets take the brunt of abrasive site debris like concrete rubble, rebar, and brick. Because the machine spends long stretches stationary while crushing rather than traveling, expect flat-spotting on idlers and rollers plus link wear concentrated at the points used to pivot and reposition. Most premature undercarriage complaints trace back to skipped daily greasing rather than a design flaw.
Any known quirks with the engine in this application?
The turbocharged inline-six in this power class is used across a wide range of Komatsu excavators and dozers and has a strong reputation for outlasting the rest of the machine when serviced on schedule. The recurring field complaints are low oil pressure readings traced to a failing oil pressure sensor or a partially clogged filter rather than actual bottom-end wear, and rough or hard starting linked to fuel system air or a sticking timing component after long idle periods. Air filtration is worth watching on a dusty crushing site since reduced intake flow accelerates ring and liner wear faster than on typical earthmoving duty. This engine also drives the crusher's hydraulic pumps directly, so any oil pressure fault should be resolved before returning the machine to full crushing load — have your dealer verify.
What electrical or sensor problems come up most?
The conveyor overload/anti-jam sensor and the emergency-stop wiring are the components most likely to give trouble on machines that have sat outside or worked wet sites. Corroded connectors and chafed harness runs are the common root cause, not the sensor element itself. The usual symptom is a conveyor that will not stop on command, or one that trips constantly with no actual jam present. This is a safety interlock circuit, so treat inconsistent stop behavior as urgent — have your dealer verify the sensor and wiring before running the belt again.
What maintenance issues come up around the crusher module itself?
The most common failure across hydraulic-adjust jaw crushers in this class, this one included, is foreign material such as rebar or steel scrap jamming the crushing chamber and bending or breaking the toggle plate. Clearing a packed chamber and swapping a buckled toggle plate is a full day of difficult, physical work, so experienced operators screen feed material closely rather than relying on the crusher to handle tramp metal. Routine checks of the main frame securing bolts, toggle tension bolts, and jaw wedge bolts are called out in service literature — these loosen with vibration and are an easy pre-shift item.
How does the hydraulic wedge (CSS) adjustment hold up over time?
The closed-side setting adjusts hydraulically without stopping the crusher, though stopping the feed while adjusting is recommended practice. Wear reported in the field concentrates in the jaw plates themselves rather than the adjustment mechanism, with uneven wear across the plate face pointing to feed distribution problems more often than a machine defect. After any hydraulic component service or hose disconnection, the circuit needs to be bled of trapped air before the wedge system will respond consistently.
What should I check before buying a used BR550JG-1?
Start at the crushing chamber: measure remaining jaw plate thickness at the top, middle, and bottom, since uneven wear points to feed or setup issues rather than normal use. Inspect the toggle plate and toggle bracket pins for cracking or deformation, and cycle the hydraulic wedge adjustment through its full range to confirm smooth, hesitation-free movement. On the undercarriage, check track shoe height against minimum spec and look for loose or leaking rollers and idlers plus cracked sprockets. Check the conveyor belt and tail drum for impact damage consistent with the machine having been driven over rough ground. Pull engine hours and service records, confirm easy cold starting and normal oil pressure, and test the conveyor overload and emergency-stop sensors for reliable operation. Frame cracking around the crusher bearing housings signals prior overload and is a walk-away item unless a structural repair is already budgeted.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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