Komatsumobile debris crusher(no series)
Komatsu BR350JG-1(S/N 1005-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu BR350JG-1 (S/N 1005-UP) is a self-propelled, crawler-mounted mobile jaw crusher built for on-site demolition and concrete or masonry recycling. It runs a Komatsu SA6D102E-1 turbocharged diesel rated around 118 kW (158 HP), the same 102-series engine block Komatsu used in its mid-size excavators of the period, driving a fully hydraulic crusher, feeder, conveyor, and travel system rather than a mechanical or belt drivetrain. Operating weight runs around 30,000 kg (66,000 lb), varying with fitted options. This -1 version dates to roughly the early-to-mid 2000s, refining the original BR350JG introduced in the 1990s; two documented serial blocks (1005-up and 1501-up) share the same engine and design, and a mid-run manual reprint around S/N 1232 reflects paperwork, not a hardware change. Beyond the base jaw-crusher setup, Komatsu offered it with a hydraulic magnetic separator, vibrating screen, discharge conveyor extension, and radio remote control as factory or dealer-fit options.
Across the BR350JG family, the bigger advances were in crusher control rather than the crusher itself: a variable-speed drive (roughly 170 to 300 rpm) and a semi-automatic, load-based feeder that slows or stops the grizzly to prevent jams, replacing older fixed-timer feed logic. Komatsu later moved this platform up to the larger BR380JG and BR380JG-1, which carry a bigger engine, higher operating weight, and larger hopper capacity, and the smaller BR350JG-1 exited Komatsu's active lineup as a result. In today's used and parts market, the BR350JG-1 still works smaller demolition and recycling sites, valued for its compact footprint and its hydraulic locking-cylinder jaw adjustment, which clears a tramp-steel jam by opening the discharge port instead of breaking a mechanical toggle. Because it shares its engine and final-drive design with excavators of the same era, engine and undercarriage wear parts stay reasonably easy to source even though Komatsu's current-generation crushers replaced it on dealer lots long ago.
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 BR350JG-1(S/N 1005-UP) specifications
Engine
| Engine model | Komatsu SA6D102E-1, 4-cycle, water-cooled, direct injection, turbocharged |
| Number of cylinders | 6 |
| Bore x stroke | 102 mm x 120 mm (4.02 in x 4.72 in) |
| Piston displacement | 5.88 L (359 cu in) |
| Rated power (flywheel, SAE J1349) | 118 kW / 158 HP at 2,100 rpm |
| Governor | All-speed, mechanical |
| Emissions | Engine meets European emission standards in effect at time of manufacture; specific tier not stated in factory literature |
Weights
| Operating weight (incl. 500 mm track shoes) | 30,000 kg (66,139 lb), approximate per factory rating |
Dimensions
| Overall (transport) length | 12,675 mm (41 ft 7 in) |
| Overall (transport) width | 2,996 mm (9 ft 10 in) |
| Overall (transport) height | 3,100 mm (10 ft 2 in) |
| Track gauge | 2,280 mm (7 ft 6 in) |
| Track shoe width | 500 mm (19.7 in) |
| Length of track on ground | 3,445 mm (11 ft 4 in) |
| Minimum ground clearance, working | 130 mm or 230 mm (5.1 in or 9.1 in), depending on discharge conveyor lifter position |
| Minimum ground clearance, traveling | 430 mm (16.9 in) |
| Discharge conveyor height | 2,500 mm (8 ft 2 in) |
Performance
| Treatment (crushing) capacity | 48-165 t/h (53-182 US tons/h) per factory rating; some published listings show a slightly narrower 47-160 t/h range, varies by source |
| Jaw crusher feed (inlet) opening | 940 mm x 500 mm (37.0 in x 19.7 in), K-Series jaw, hydraulic drive |
| Maximum feed lump size (concrete debris) | 800 mm x 450 mm x 1,000 mm (31.5 in x 17.7 in x 39.4 in), width x thickness x length |
| Crusher outlet setting (open side, adjustable) | 50-120 mm (2.0-4.7 in) |
| Crusher rotating speed (variable) | 170-300 rpm |
| Vibrating grizzly feeder frequency | up to 1,100 rpm |
| Vibrating grizzly feeder size | 870 mm x 3,070 mm (34.3 in x 120.9 in), amplitude 9 mm (0.35 in) unloaded |
| Discharge conveyor belt | 900 mm wide x 12 mm thick (35.4 in x 0.47 in), belt speed 95 m/min (312 ft/min) |
| Hydraulic system maximum flow | 2 x 226 L/min (2 x 59.7 US gal/min), closed-center load-sensing system with variable-displacement piston pumps |
| Hydraulic system maximum pressure | 150 kg/cm2, approximately 2,134 psi (14.7 MPa) |
Service capacities (summary)
| Fuel tank | 350 L (92.5 US gal) |
| Cooling system (radiator) | 11 L (2.9 US gal) |
| Engine oil | 24 L (6.3 US gal) |
| Hydraulic system | 230 L (60.8 US gal) |
| Final drive, each side | 6 L (1.6 US gal) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
BR350JG-1(S/N 1005-UP) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with oil filter) | 24 L (6.3 US gal) | Komatsu Genuine engine oil, SAE 10W-30 for temperate/cold ambient conditions, SAE 15W-40 for warmer ambient conditions. Select grade by expected ambient temperature range per the OMM lubricant chart. |
| Cooling system (radiator) | 11 L (2.9 US gal) | Komatsu Genuine Super Coolant AF-NAC, an ethylene-glycol base, permanent-type antifreeze and anti-corrosion coolant. Mix ratio follows the lowest expected ambient temperature for the work site. |
| Fuel tank | 350 L (92.5 US gal) | ASTM D975 No. 2-D diesel fuel for normal ambient temperatures; switch to a lighter No. 1-D grade diesel in cold climates for better cold-flow and startability. |
| Final drive, each side (x2) | 6 L (1.6 US gal) per side | Komatsu Genuine powertrain oil TO30 (SAE 30) for normal ambient temperatures; TO10 (SAE 10W) in cold climates. |
| Hydraulic system (tank and circuit, total) | 230 L (60.8 US gal) total system fill | Komatsu Genuine hydraulic oil, HO46-HM grade (ISO VG46 anti-wear type) for normal ambient conditions, with a lighter viscosity grade specified for cold-start climates and a heavier grade for sustained hot-climate operation per the OMM's ambient-temperature selection chart. |
| Grease (centralized lubrication points, spec only) | Not a drain-and-fill capacity; applied via grease points/centralized lubrication system | Komatsu Genuine lithium EP grease G2-LI (NLGI 2), effective service range roughly -20 degC to +120 degC. Serves as the single multipurpose grease for pins, bushings, and bearing points on the machine. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu BR350JG-1(S/N 1005-UP) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
Servicing the BR350JG-1(S/N 1005-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Oil cleanliness drives pump and motor life on this fully hydraulic crusher: track travel, jaw drive, feeder, and conveyor all run off one circuit, so contamination hits every system at once. Pull engine oil, hydraulic oil, and final-drive oil samples on schedule and run them through Komatsu's oil and wear analysis program to catch pump, motor, or injection-pump wear on the SA6D102E-1 early. Watch for gradual smoke or power loss, a sign of injection-pump calibration drift, and clean radiator and oil-cooler cores often since crushing dust clogs them fast.
Corrective & Common Repairs
Most repairs trace to abrasive concrete and brick dust rather than a single weak part. Expect jaw and cheek plate wear, conveyor belt cuts and mistracking from embedded rebar, and packed fines accelerating crawler pin-and-bushing wear well ahead of hours alone. Feeder control complaints are usually dust- and vibration-loosened harness connectors near the crusher box, not sensor failure. Check wiring before condemning a switch. Where a magnetic separator is fitted, declining lift strength from heat and hours, not a control fault, lets steel pass into the discharge pile.
Overhaul & Rebuild Points
Rebuild the jaw and cheek plates together with the hydraulic locking-cylinder circuit that sets closed-side gap and handles overload release; this cylinder opens the discharge port on a tramp-steel jam instead of letting a toggle plate fracture, so verify its release pressure against factory spec at every major rebuild. Budget for SA6D102E-1 injector and turbocharger reconditioning as mechanical injection wears in. Undercarriage overhauls should replace track chain, rollers, idlers, and sprockets as a set, since fines-driven wear rarely stays even across components.
Seasonal & Environment Servicing
Cold starts on the SA6D102E-1 need correct-viscosity engine oil and coolant checked for freeze protection before winter demolition work; drain the fuel water separator more often as condensation increases. Concrete and masonry dust loads air cleaners, radiator fins, and oil cooler cores fast on continuous crushing jobs, so shorten cleaning intervals well below general-duty guidance. Wet, clay-heavy debris packs the vibrating feeder and crawler undercarriage with abrasive fines; wash down the feeder, crusher box, and tracks regularly so packed material doesn't mask real wear on jaw plates and track components.
BR350JG-1(S/N 1005-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 20Y-60-21460 | Neck,Filter | Scheduled service item | Check fitment → |
| 20Y-60-21470 | Element | Scheduled service item | Check fitment → |
| 20Y-60-21510 | Element | Scheduled service item | Check fitment → |
| 702-21-53120 | Filter | Scheduled service item | Check fitment → |
| 08036-01414 | Clip,(For Add.Filter)(Except Japan) | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
BR350JG-1(S/N 1005-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| Engine oil pressure caution lamp (red, oil-can icon) | Engine oil pressure has dropped below the safe minimum. | Low oil level, clogged oil filter or strainer, worn oil pump, or a faulty pressure switch. | Stop the engine at once, check oil level and filter condition, then test the oil pressure switch before restarting. |
| Coolant temperature caution lamp / gauge | Engine coolant temperature has gone above the normal operating range. | Low coolant level, radiator fins clogged with crushing dust, a slipping fan belt, or a stuck thermostat. | Idle down, shut off, and let the engine cool; clear the radiator core of dust and check coolant level and belt condition before resuming. |
| Battery charge caution lamp (battery icon) | The lamp stays lit during operation, meaning the alternator is not charging. | Broken or slipping fan/alternator belt, a failed alternator, or a loose or corroded wiring connection. | Check belt condition and tension and battery terminals; have the alternator tested if the lamp stays on with the engine running. |
| Air cleaner restriction indicator | Intake air restriction has reached the set limit, typically from heavy dust loading during crushing. | Clogged air filter element or a damaged, loose intake duct. | Inspect and clean or replace the air filter element and check the intake ducting for damage or loose clamps. |
| Hydraulic oil temperature warning | Hydraulic oil temperature has risen above the normal range, affecting the travel, crusher drive, feeder, and conveyor circuits. | Low hydraulic oil level, a clogged oil cooler core, degraded oil, or sustained overload heating the circuit. | Stop operation, check hydraulic oil level and clean the cooler, and confirm oil condition meets spec before continuing. |
| Fuel level caution lamp | Fuel tank level has reached reserve. | Normal fuel consumption approaching empty. | Refuel promptly to avoid drawing air into the fuel system. |
| Crusher overload / feeder stop indicator | The feeder's semi-automatic overload-prevention control has slowed or stopped feed into the jaw because crushing load is too high. | Oversized or excess material fed into the crushing chamber, a spike in jaw drive pressure, or a fault in the overload-sensing circuit itself. | Clear oversized material from the chamber, reduce feed rate, and reset the feeder; if it trips without an actual overload, check the overload sensor and wiring per the shop manual. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
BR350JG-1(S/N 1005-UP) attachments & work tools
Magnetic separator
Factory option mounted over the primary discharge conveyor, sized to the 900 mm belt width. Pulls rebar and other ferrous debris out of crushed concrete before stockpiling. Runs off the dedicated equipment hydraulic circuit, not a standard-fit item.
Muck / debris conveyor
Offered as a fixed unit (about 4 m long, 450 mm belt) or a retractable unit (about 3 m long, 450 mm belt) mounted under the grizzly feeder to clear fines ahead of the jaw. Retractable version adds a winch and an M-type or muck-type discharge chute; both variants tie into the machine's optional-equipment hydraulics.
Screening unit
Single-deck vibratory screen, about 900 mm x 2400 mm, hydraulically driven off the same equipment circuit as other options. Interchangeable hard-rubber mesh decks are offered in roughly 28 mm, 35 mm, and 50 mm apertures to grade the crushed product into size fractions.
Secondary / extension conveyor
Portable, hydraulic-drive belt conveyors in two lengths, about 7 m and about 10 m, both with a 600 mm belt. Used downstream of the main discharge belt to stockpile product or feed a separate screening line, extending reach beyond the machine's own 2.5 m discharge height.
Coupler / mounting and hydraulic-kit arrangement
This class has no quick-attach coupler like an excavator; work tools bolt to chassis-mounted brackets and plug into pre-installed hydraulic outlet ports fed by the machine's closed-center, load-sensing hydraulic system. The circuit is sized for up to four equipment options, and fitted tools are run from the main control panel alongside the crusher, feeder, and conveyor controls.
Radio remote control and factory guarding
Optional radio remote control lets an off-machine operator (e.g. an excavator operator feeding the hopper) trigger the feeder on/off switch, emergency stop, and horn. Standard guarding includes emergency shut-off buttons on both sides of the chassis and conveyor and at the control panel, a rotating warning lamp and buzzer tied to overload or conveyor malfunction, plus handrails, walkway decking, and a sprinkler nozzle/connector for dust suppression.
All BR350JG-1(S/N 1005-UP) assemblies by section
Every catalogued assembly group for the Komatsu BR350JG-1(S/N 1005-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Control System And Main Frame
Komatsu : Br350jg-1(S/N 1005-Up) : Control System And Main Frame : Fuel Control
| 01***25 | Bolt,(Rear Attachment Less) | 2 |
| 01***30 | Bolt,(With Body Positioner) | 1 |
| 01***40 | Bolt (Op) | 3 |
Komatsu : Br350jg-1(S/N 1005-Up) : Control System And Main Frame : Main Frame
| 01***75 | Bolt | 16 |
| 01***80 | Washer,(For Shipping) | 16 |
| 82***12 | Frame,Main | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Control System And Main Frame : Travel Control Lever And Linkage
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***30 | Bolt,(With Body Positioner) | 4 |
Crusher Control System
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Control Valve (1/11)
| 01***20 | Bolt | 24 |
| 07***23 | O-Ring; Was 07002-10823, O-Ring,(Not Shown) | 12 |
| 07***80 | O-Ring | 12 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Control Valve (10/11)
| 01***20 | Bolt | 4 |
| 07***40 | O-Ring,Water Pump Mount | 2 |
| 07***09 | O-Ring,(For Dual Tilt Dozer) | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Control Valve (11/11)
| 01***45 | Bolt | 4 |
| 01***23 | Washer,(For Shipping) | 4 |
| 07***24 | O-Ring | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Control Valve (2/11)
| 07***40 | O-Ring,Water Pump Mount | 4 |
| 07***12 | O-Ring, Divider Valve Mounting | 9 |
| 07***15 | O-Ring,Regulator Valve | 6 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Control Valve (3/11)
| 07***34 | O-Ring,See Fig. K4010-65a0 | 4 |
| 70***20 | O-Ring | 4 |
| 72***30 | Plug | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Control Valve (4/11)
| 01***90 | Bolt,(Without Cab) | 4 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 8 |
| 07***07 | O-Ring - (K10) | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Control Valve (5/11)
| 07***14 | O-Ring,(F4350-61a0a-20 ) | 1 |
| 07***16 | O-Ring,Suction And Relief Valve | 1 |
| 07***34 | O-Ring,(For 2-Actuater Attachment) | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Control Valve (6/11)
| 07***08 | O-Ring | 1 |
| 07***08 | Ring,Back-Up | 1 |
| 07***23 | O-Ring,(F4350-65a0 -16 ) | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Control Valve (7/11)
| 01***50 | Bolt | 14 |
| 01***32 | Washer, (Without Emergency Steering) | 14 |
| 07***20 | O-Ring,(0202-007) | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Control Valve (8/11)
| 01***08 | Nut (Op) | 1 |
| 07***11 | O-Ring (Kit) | 1 |
| 07***24 | O-Ring | 3 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Control Valve (9/11)
| 01***60 | Capscrew | 4 |
| 01***40 | Bolt (Op) | 4 |
| 01***30 | Bolt (Itl) | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Crusher Motor (1/2)
| 04***30 | Ring,Snap? Sprocket | 1 |
| 07***25 | O-Ring,Injection Pump Mounting | 1 |
| 07***23 | O-Ring,(Crusher?Other Att.For Ppc Con | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Crusher Motor (2/2)
| 01***75 | Bolt - Tube Mounting | 8 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 8 |
| 07***42 | O-Ring, Between Tube And Divider Valve | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Epc Valve
| 07***11 | O-Ring (Kit) | 4 |
| 07***11 | Plug, Plug,(Without Bypass Hose) | 3 |
| 20***20 | Screw | 8 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Hydraulic Tank
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
| 01***12 | Bolt - Front Cover Mounting | 3 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Main Piping (Main Pump)
| 01***40 | Bolt, Mount Master Brake Cylinder | 10 |
| 01***80 | Bolt,(Not Shown) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 12 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Main Piping (Main Valve)
| 01***30 | Bolt,(Not Used With Emergency Str.) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 1 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Main Piping (Oil Cooler Lines)
| 01***40 | Bolt,(With Service Valve R.H.) | 12 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 2 |
| 01***11 | Nut,(With Under Mirror) | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Main Piping (Self Pressure Reducing Valve Line)
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 4 |
| 07***10 | Elbow,(For Long Lever Control) | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Main Piping (Suction Line)
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
| 07***85 | O-Ring,(Without Fuel Level Gauge) | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Main Pump (1/10)
| 04***18 | Bolt, Eye | 1 |
| 07***12 | Plug,Magnetic | 1 |
| 70***10 | O-Ring | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Main Pump (10/10)
| 01***65 | Screw | 2 |
| 01***08 | Nut,(For Straight Tilt Dozer) (D65p) | 2 |
| 01***08 | Nut | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Main Pump (2/10)
| (****0) | Cap Ass'Y,End | 1 |
| (****0) | Bearing | 2 |
| (****8) | Pin, Dowel | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Main Pump (3/10)
| 04***25 | Ring,(W/Emergency Steering) (1m?1d) | 1 |
| 70***61 | Seal, Oil | 1 |
| 70***60 | Spacer | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Main Pump (4/10)
| (****0) | O-Ring | 1 |
| (****0) | O-Ring | 1 |
| (****1) | Set Screw | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Main Pump (5/10)
| 04***22 | Bolt,Eye | 1 |
| 07***14 | Plug, (For Shipping) | 1 |
| 07***12 | Plug,Magnetic | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Main Pump (6/10)
| (****1) | Seat | 1 |
| (****1) | Block Ass'Y,Rear | 1 |
| (****0) | Bearing | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Main Pump (7/10)
| (****0) | O-Ring | 1 |
| (****0) | O-Ring | 1 |
| (****1) | Set Screw | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Main Pump (8/10)
| (****0) | Ring | 1 |
| (****0) | Coupling | 1 |
| (7***0) | Pump Sub Ass'Y | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Main Pump (9/10)
| 07***09 | O-Ring | 2 |
| 70***10 | O-Ring | 2 |
| 70***20 | O-Ring | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Main Pump (Connecting Parts)
| 01***40 | Bolt (Op) | 10 |
| 01***45 | Bolt,(With Water Separator Type) | 2 |
| 01***32 | Washer,(With Auto Emergency Steering) | 12 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Pilot Valve
| 01***20 | Bolt | 3 |
| 01***20 | Bolt | 4 |
| 01***25 | Screw | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Ppc Valve (For Crusher)
| 01***25 | Bolt, Seal Cover Mounting | 2 |
| 70***70 | Pilot Valve,(See Fig.Y1670-21a0) | 1 |
| 70***40 | Shim - 0.012 In. (0.30 mm) | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Ppc Valve (For Travel)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 4 |
| 01***55 | Screw | 2 |
| 01***12 | Screw | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Travel Motor (1/3)
| 01***35 | Screw | 12 |
| 07***09 | O-Ring,(For Dual Tilt Dozer) | 2 |
| 07***40 | O-Ring, Divider Valve Mounting | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Travel Motor (2/3)
| 04***25 | Ring, Snap | 1 |
| 70***90 | Seal,Oil | 1 |
| 70***91 | Seal,Oil | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Crusher Control System : Travel Motor (3/3)
| 70***10 | Valve Ass'Y,Relief | 2 |
| 70***11 | Valve Ass'Y,Relief | 2 |
| (7***0) | Motor Ass'Y | 1 |
Engine Related Parts And Electrical System
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Air Cleaner Connection
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***19 | Washer,Spring (With Extinguisher) (D31p) | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Air Cleaner Connection (For Double Element)
| 01***90 | Bolt, Priority Valve Mounting | 1 |
| 01***35 | Bolt, Mount Bracket To Floor | 2 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Control Box(#1005-1500)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***12 | Screw (Without Radio Or Stereo) (2) | 2 |
| 01***08 | Screw | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Control Box(#1501-)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***12 | Screw (Without Radio Or Stereo) (2) | 2 |
| 01***08 | Screw | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Cooling (Fan Guard)
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 7 |
| 01***32 | Washer,(With Auto Emergency Steering) | 11 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Cooling (Piping)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
| 07***55 | Clamp, Hose | 3 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Cooling (Radiator)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 6 |
| 01***16 | Bolt? Wing,Wing | 2 |
| 01***16 | Screw | 8 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Cooling (Sub Tank And Radiator Mount)
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Damper
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***32 | Washer,(With Auto Emergency Steering) | 8 |
| 20***20 | Pin | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Electrical System (Battery)
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Electrical System (Control Box)
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 4 |
| 01***16 | Bolt - Box Mounting | 9 |
| 01***90 | Bolt,With Cover | 4 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Electrical System (Emergency Switch)
| 01***20 | Bolt,(Without Air Con. Or Heater) | 4 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 26 |
| 01***12 | Screw (Without Radio Or Stereo) (2) | 16 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Electrical System (Feeder Lamp And Head Lamp)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***20 | Bolt,(For Mono Lever Steering) | 5 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Electrical System (Horn)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***25 | Bolt,(Rear Attachment Less) | 4 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Electrical System (Main Harness) (1/2)(#1005-1500)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 15 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Electrical System (Main Harness) (1/2)(#1501-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 17 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Electrical System (Main Harness) (2/2)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 9 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Electrical System (Rear Lamp)(#1005-1500)
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 16 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 1 |
| 01***11 | Nut - Mounting | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Electrical System (Rear Lamp)(#1501-)
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 19 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 1 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 20 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Electrical System (Wiring (Battery To Engine))
| 01***20 | Bolt,(Without Air Con. Or Heater) | 2 |
| 01***16 | Bolt - Seat And Tether Belt Mounting | 1 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Engine Mounting Parts
| 01***65 | Bolt,(Used With Pin Puller) | 14 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 14 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 4 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Engine Oil Drain Hose
| 07***80 | Clamp, Drain Hose | 1 |
| 07***18 | Hose | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Fuel Lines
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 7 |
| 01***60 | Bolt,For Weight Adjusting Bolt | 1 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 8 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Fuel Tank
| 01***12 | Bolt - Front Cover Mounting | 4 |
| 01***35 | Bolt,(With Rops) | 6 |
| 01***23 | Washer,(With Auto Emergency Steering) | 4 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Monitor Panel
| 01***05 | Nut,(For Air Conditioner Less), Nut | 4 |
| 01***08 | Washer,(For 1 Attachment And Pat) | 4 |
| 78***01 | Monitor | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Over Feed Caution System(#1111-)
| 01***12 | Bolt - Front Cover Mounting | 4 |
| 01***20 | Bolt,(Without Air Con. Or Heater) | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Radio Controll System
| 01***10 | Bolt,For Additional Rear Lamp | 1 |
| 01***12 | Bolt - Front Cover Mounting | 3 |
| 01***12 | Screw (Without Radio Or Stereo) (2) | 4 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Radio Controll System (Eu Spec.)(#1238-)
| 01***12 | Bolt - Front Cover Mounting | 2 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 1 |
| 01***05 | Nut,(For Air Conditioner Less), Nut | 16 |
Komatsu : Br350jg-1(S/N 1005-Up) : Engine Related Parts And Electrical System : Radio Controll System (Usa Spec.)
| 01***10 | Bolt,For Additional Rear Lamp | 1 |
| 01***12 | Bolt - Front Cover Mounting | 3 |
| 01***12 | Screw (Without Radio Or Stereo) (2) | 4 |
Guard
Komatsu : Br350jg-1(S/N 1005-Up) : Guard : Battery Case
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***23 | Washer,(With Auto Emergency Steering) | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Guard : Engine Step(#1238-)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
| 82***11 | Cover | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Guard : Guard (Battery Box)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 6 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 6 |
| (8***0) | Case Ass'Y | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Guard : Guard (Cab Cover)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 3 |
Komatsu : Br350jg-1(S/N 1005-Up) : Guard : Guard (Case R.H.)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 8 |
| 01***30 | Bolt,For Weight Adjusting Bolt | 4 |
Komatsu : Br350jg-1(S/N 1005-Up) : Guard : Guard (Deck)(#1005-1500)
| 01***30 | Bolt,(Not Used When Towing Winch) | 23 |
| 01***35 | Bolt,(With Rops) | 6 |
| 01***26 | Washer,Spring | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Guard : Guard (Deck)(#1501-)
| 01***30 | Bolt,(Not Used When Towing Winch) | 18 |
| 01***35 | Bolt,(With Rops) | 6 |
| 01***26 | Washer,Spring | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Guard : Guard (Floor)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 19 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 26 |
| 01***10 | Nut,(Without Air Conditioner) | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Guard : Guard (Frame L.H.)
| 01***30 | Bolt,(Not Used When Towing Winch) | 24 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 19 |
| 17***70 | Washer (Isolator Mounting) | 5 |
Komatsu : Br350jg-1(S/N 1005-Up) : Guard : Guard (Frame R.H.)
| 01***30 | Bolt,(Not Used When Towing Winch) | 8 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 8 |
| 82***81 | Bracket | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Guard : Guard (Frame)
| 01***30 | Bolt,(Not Used When Towing Winch) | 8 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 8 |
| 20***21 | Frame | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Guard : Guard (Hand Rail)
| 01***30 | Bolt,(Not Used When Towing Winch) | 30 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 30 |
| 82***20 | Hand Rail | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Guard : Guard (Hood)
| 01***30 | Bolt,(Not Used With Emergency Str.) | 10 |
| 01***10 | Nut,(Without Air Conditioner) | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 14 |
Komatsu : Br350jg-1(S/N 1005-Up) : Guard : Guard (L.H. Door)
| 01***12 | Bolt - Front Cover Mounting | 2 |
| 01***16 | Bolt - Box Mounting | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Guard : Guard (Level)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***08 | Washer,(For 1 Attachment And Pat) | 3 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Guard : Guard (Mirror)
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***11 | Nut,(With Under Mirror) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 6 |
Komatsu : Br350jg-1(S/N 1005-Up) : Guard : Guard (Partition Air)
| 01***30 | Bolt,(Not Used When Towing Winch) | 11 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 7 |
| 17***70 | Washer (Isolator Mounting) | 4 |
Komatsu : Br350jg-1(S/N 1005-Up) : Guard : Guard (Partition Plate)
| 01***30 | Bolt,(Not Used With Emergency Str.) | 2 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 24 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 20 |
Komatsu : Br350jg-1(S/N 1005-Up) : Guard : Guard (Precleaner)
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***16 | Screw | 4 |
Komatsu : Br350jg-1(S/N 1005-Up) : Guard : Guard (R.H. Door)
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 2 |
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***30 | Bolt,(Not Used With Emergency Str.) | 12 |
Komatsu : Br350jg-1(S/N 1005-Up) : Guard : Guard (Rear Cover)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 9 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 10 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Guard : Guard (Tool Box)
| 01***30 | Bolt,(Not Used When Towing Winch) | 5 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 5 |
| (8***0) | Box Ass'Y | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Guard : Guard (Under Cover)
| 01***30 | Bolt,(Not Used When Towing Winch) | 31 |
| 01***12 | Bolt | 3 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 31 |
Komatsu : Br350jg-1(S/N 1005-Up) : Guard : Tool Box
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 2 |
Under Carriage
Komatsu : Br350jg-1(S/N 1005-Up) : Under Carriage : Carrier Roller
| 01***75 | Bolt,Dust | 8 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 8 |
Komatsu : Br350jg-1(S/N 1005-Up) : Under Carriage : Final Drive
| 01***60 | Capscrew | 36 |
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 8 |
Komatsu : Br350jg-1(S/N 1005-Up) : Under Carriage : Front Idler
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 2 |
| 07***24 | Plug | 1 |
| 20***90 | Pin,Dowel | 2 |
Komatsu : Br350jg-1(S/N 1005-Up) : Under Carriage : Idler Cushion
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***55 | Bolt,(Not Used For Chip Dozer) | 8 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
Komatsu : Br350jg-1(S/N 1005-Up) : Under Carriage : Track Frame
| 01***75 | Bolt | 20 |
| 01***80 | Washer,(For Shipping) | 20 |
| 82***12 | Frame,Track | 1 |
Komatsu : Br350jg-1(S/N 1005-Up) : Under Carriage : Track Roller
| 01***45 | Washer,(Without R.O.P.S.) | 48 |
| 20***60 | O-Ring | 2 |
| 20***14 | Track Roller Ass'Y | 12 |
Komatsu : Br350jg-1(S/N 1005-Up) : Under Carriage : Track Shoe
| 15***20 | Nut? Shoe (Y0320-K1) | 426 |
| 20***03 | Track Link Ass'Y | 1 |
| 20***44 | Track Shoe Ass'Y | 1 |
BR350JG-1(S/N 1005-UP) serial number reference
The ID plate for this crusher is riveted to the main frame, typically near the operator control station or a frame crossmember on the crusher deck, and lists the model code BR350JG-1 alongside the machine serial number. Unlike Caterpillar-style PINs, there is no 3-letter plant/family prefix ahead of the number - read the plate as model code plus a plain sequential digit string, and match that number against the serial range in the parts or shop manual. A separate plate on the engine block carries the engine serial and emissions data and should not be confused with the machine PIN.
| Prefix | Identifies | Notes |
|---|---|---|
| No alpha PIN prefix documented | BR350JG-1, S/N 1005 and up (full production run) | This model carries a plain sequential machine number stamped on the ID plate (1005, 1232, 1236, 1501, etc.), not a 3-character alphabetic PIN prefix. No parts listing, dealer reference, or manual source ties a letter code to this machine. Treat the whole run as one family identified by model code BR350JG-1 plus serial number only. |
| 1005 - 1500 (numeric block) | Early production block, SA6D102E-1 diesel | Parts catalog documentation breaks at serial 1500/1501 as a chapter split. Fitted engine is the SA6D102E-1 (118 kW / 158 HP at 2,100 rpm) across this block, same as the later block - no engine change documented at this break. Confirm with dealer before assuming any running production change at this line. |
| 1501 - UP (numeric block) | Later production block, SA6D102E-1 diesel | Lubricant and service reference literature for this block lists the same SA6D102E-1 engine (118 kW / 158 HP at 2,100 rpm) as the 1005-1500 block, so no engine change is documented at this break. Confirm with dealer for any running production changes. |
Frequently asked questions
What engine does the Komatsu BR350JG-1 (S/N 1005-UP) use?
It runs a Komatsu SA6D102E-1 turbocharged diesel rated at about 118 kW (158 HP), the same base engine block Komatsu used in its mid-size excavators of that era, driving the crusher, feeder, conveyor, and crawler travel through one hydraulic system.
What is the operating weight of the BR350JG-1?
Base operating weight is about 30,000 kg (66,000 lb). Actual weight varies with fitted options such as a magnetic separator, vibrating screen, or discharge conveyor extension.
What replaced the Komatsu BR350JG-1?
Komatsu moved this platform up to the larger BR380JG and later BR380JG-1, which carry a bigger engine, higher operating weight, and larger hopper capacity. The BR350JG-1 itself had already updated the original BR350JG introduced in the 1990s.
What BR350JG-1(S/N 1005-UP) owners discuss
What kind of hydraulic/powertrain behavior is typical for the BR350JG-1, and what do owners flag as the main wear point?
The BR350JG-1 is fully hydraulic driven - track travel, jaw drive, vibrating feeder and conveyor all run off the main pump circuit rather than mechanical or belt drives. That layout is straightforward to service but makes oil cleanliness the biggest single driver of pump and motor life. In dusty demolition work, fine concrete and brick dust works past tank breathers and around cylinder rod seals if they're neglected, so the recurring complaint on this class of self-propelled crusher is gradual pump and drive-motor wear from contaminated oil rather than any one component defect. Keep the return-line filter and tank breather on a tight interval and don't stretch hydraulic oil change intervals just because the machine sits idle between jobs.
What engine does the BR350JG-1(S/N 1005-UP) actually run, and are there known quirks with it?
This serial range uses the Komatsu SA6D102E-1, a turbocharged, aftercooled inline-six rated around 118 kW (158 hp) - the same base 102-series block fitted to that era's mid-size excavators, not a crusher-specific engine. It uses mechanical (jerk-pump) injection, not electronic common-rail, so quirks run mechanical: injection pump calibration drifts with hours, showing up as gradual power loss or extra smoke well before any dramatic failure, and oil cooler O-ring seepage appears at higher hours. Because a crusher sits at steady load far more than an excavator doing mixed digging cycles, owners report the radiator and oil cooler core clog with fine dust faster than on earth-moving machines sharing this engine - clean the cores on a shorter interval than the manual's general-duty schedule suggests.
What undercarriage wear pattern should I expect on a tracked crusher like this?
The crawler undercarriage follows the same wear logic as any tracked machine, but the environment is harder on it. Crushed concrete and brick fines are abrasive and pack into the track links, rollers and idlers tighter than ordinary dirt, accelerating pin-and-bushing wear ahead of what hours alone would predict. Consensus among operators running this type of debris crusher is to wash down and re-tension tracks on a shorter interval than a dozer or excavator logging the same hours, and to watch roller flange wear closely since packed fines act almost like grinding paste once embedded.
How does the jaw/toggle plate adjustment work on this machine, and what should I know about it?
Komatsu's selling point on this jaw is a hydraulic locking-cylinder setup for closed-side-setting adjustment instead of a shim-and-spring toggle, so gap changes are a one-touch hydraulic adjustment rather than the tension-spring wrestling match older toggle designs require. That same locking cylinder is the overload protection: on a jam from tramp steel or an oversized slab, the design releases the locking cylinder to fully open the discharge port instead of letting a toggle plate bend or fracture the way older jaw designs do, which is why clearing a jam on this crusher is comparatively quick and doesn't usually mean replacing a broken toggle. Toggle-plate and jaw-plate wear are still routine daily checks, but the locking-cylinder release pressure that protects the frame is a safety setting, not a wear item - have your dealer verify that release pressure against factory spec rather than assume a used machine's circuit is still set correctly.
Are there common electrical or sensor complaints on this crusher?
The feeder runs a semi-automatic overload-protection control that slows or stops the vibrating grizzly feeder based on crusher load instead of a fixed timer. On machines of this type and era, the recurring issue isn't sensor failure itself - it's dust and constant vibration working harness connectors and pressure-switch wiring loose over years of service, which shows up as an erratic or overly sensitive feeder response rather than a clean fault code. Before condemning a sensor or switch, check the harness connectors and wiring routed near the crusher box first.
What about the conveyor and magnetic separator - anything to watch?
The debris discharge conveyor, magnetic separator, vibrating screen, and radio remote are options on this crusher rather than fitted on every unit, so confirm on any specific machine whether the separator is actually installed before assuming it's there to pull rebar and embedded steel out of the rubble stream. Where it is fitted, belt tracking and scraper wear are routine consumables in this service - fine concrete dust is abrasive on belt covers and idlers, so belt life tends to run shorter here than on a clean-aggregate conveyor doing the same hours. Magnet lifting performance drops gradually with heat and hours; if separated steel starts making it through to the discharge pile, that's usually a tired magnet losing strength, not a control fault.
What should I check before buying a used BR350JG-1(S/N 1005-UP)?
Confirm the serial falls inside this documentation block - Komatsu split manuals partway through this model's production run, with a later block starting a few hundred serials on, and hydraulic and feeder-control calibration values vary slightly between blocks. Match paperwork to the actual machine before trusting any adjustment figure. Beyond that: check engine smoke and oil condition, since injection pump calibration drift on this mechanical fuel system shows up here first; listen to the jaw drive motor and travel motors under load for pump whine or hydraulic sluggishness; measure remaining jaw plate, cheek plate and toggle wear rather than trusting a seller claim that wear parts were recently changed; inspect the crawler undercarriage for packed fines and pin/bushing wear; check the frame and crusher-box mounting welds for fatigue cracking, since constant crushing vibration stresses them harder than travel hours alone would suggest; and run the feeder to confirm the overload control actually modulates under load rather than running wide open. Have your dealer verify the hydraulic relief and toggle-release pressure settings before you rely on them.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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