Komatsucrane(no series)
Komatsu LC755-3-EC(S/N 30001-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu LC755-3-EC is a 4.9-ton class mini crawler crane built by Maeda and sold under the Komatsu badge for tight-access lifting work. It runs on a Komatsu 4D102E four-cylinder diesel, 3.9 L displacement, rated 40.5 kW (55 PS) at 1,750 rpm with mechanical injection and no ECU, and travels on rubber tracks with a two-speed drive of 2.2/3.2 km/h (1.4/2.0 mph). Operating weight for this -3 series (S/N 30001-UP) is 9,600 kg (21,164 lb), up from 8,800 kg (19,401 lb) on the earlier base LC755 platform without the -3 suffix, which also carried a larger 44.2 kW (60 PS) engine at 2,000 rpm. The 5-section fully hydraulic telescopic boom extends 4.56 to 15.56 m (15.0-51.0 ft) with -2 to 80 degree derrick travel, giving a maximum lifting height of 16.35 m (53.6 ft) and a maximum rated capacity of 4.9 t (10,800 lb) at 2.1 m radius on 4-part line. Komatsu offered the -3 series in two control types: this EC (electric/solenoid-valve control) unit and the mechanically-valved ME sibling. No outrigger or fly-jib option and no confirmed successor model are documented for this range.
The move from the base LC755 to the -3 series traded peak engine output for a heavier, more capable chassis and added the EC solenoid-valve control option alongside the original ME mechanical linkage, letting buyers choose remote-style proportional control without changing the rest of the machine. Standard safety fitment carried through the update: a digital load moment limiter with D1-D9 diagnostic codes, an anti-two-block cutout, and a counter-balance holding valve on the derrick cylinder, and these remain the baseline items to verify on any used unit. Komatsu no longer builds telescopic mini crawler cranes, so this EC configuration now trades mostly on the used market for confined-space, indoor, and floor-load-sensitive lifting where its low ground pressure and compact folded dimensions matter most. Parts and service traceability run through the historical Komatsu/Maeda dealer network, and factory documentation for this exact serial range is limited, so confirming control type (EC vs ME), undercarriage condition, and load-limiter function before purchase carries real weight in this market.
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 LC755-3-EC(S/N 30001-UP) specifications
Engine
| Engine model | Komatsu 4D102E, 4-cylinder inline diesel |
| Displacement | 3.9 L (102 mm bore x 120 mm stroke) |
| Flywheel power | 40.5 kW (55 PS) at 1,750 rpm per the LC755-3 factory spec sheet. The earlier LC755 base platform (no -3 suffix) is rated 44.2 kW (60 PS) at 2,000 rpm — power varies by series/generation |
| Emissions tier | Not published for this range. Mechanical (non-electronic) diesel, consistent with this crane's early-2000s production era |
| EC vs ME engine option | LC755-3 is offered with EC and ME engine-option suffixes on the same chassis. Parts documentation ties certain electrical components (EMO switch) specifically to the EC build, confirming EC and ME are distinct factory engine/electrical options rather than regional codes. The base engine documented for the LC755-3 line is the Komatsu 4D102E; a separately published spec sheet naming the exact engine tag for the EC option specifically was not found — verify against the S/N 30001-UP nameplate or dealer parts book |
Weights
| Operating weight | 9,600 kg (21,164 lb) per the LC755-3 factory spec sheet |
| Predecessor platform weight | The earlier LC755 base model (pre -3 update) lists 8,800 kg (19,401 lb) operating weight — weight varies by series/generation, confirm against the specific S/N range |
| Shipping/transport weight | Approximately 9,600 kg (21,164 lb), same as operating weight for this class of mini crawler crane |
| Ground pressure | Not confirmed across independent sources for this exact model — not included |
Dimensions
| Overall length | Approximately 4,977 mm (16.3 ft) per the related LC-series factory spec table |
| Overall width | 2,320 mm (7.6 ft) |
| Overall height | 2,700 mm (8.9 ft) |
| Track gauge | 1,870 mm (6.1 ft) |
| Length of track on ground | Approximately 2,868 mm (9.4 ft) |
| Minimum ground clearance | 360 mm (14.2 in) |
| Tail swing radius | 1.4 m (4.6 ft) |
| Note | Width and track gauge figures are consistent between the LC755-3 factory brochure diagram and the related LC755 spec table. Overall length/height are drawn from the labeled LC-series table; the LC755-3 brochure's own dimension diagram gives close but not pixel-identical figures, likely reflecting minor counterweight/cab updates for the -3 revision. Verify exact transport dimensions with your dealer for the S/N 30001-UP build |
Performance
| Travel speed | Two-speed: 2.2 km/h (1.4 mph) low, 3.2 km/h (2.0 mph) high, per the LC755-3 factory spec sheet. The earlier LC755 base platform lists a single 2.9 km/h (1.8 mph) travel speed — varies by series/generation |
| Swing | 360-degree continuous slew at approximately 2.0-2.1 rpm |
| Boom derricking angle/speed | -2 degrees to 80 degrees, full travel in about 14 seconds |
| Boom telescoping | Hydraulic plus mechanical (wire-rope) telescope, 11.0 m (36.1 ft) stroke, full extend/retract in about 27 seconds |
| Boom length range | 4.56-15.56 m (15.0-51.0 ft), 5-section fully hydraulic telescopic boom |
| Maximum working radius | 14.45 m (47.4 ft) |
| Maximum lifting height | 16.35 m (53.6 ft) on the LC755-3; the earlier LC755 base platform lists 16.2 m (53.1 ft) |
| Maximum rated lifting capacity | 4.9 t (10,800 lb) at 2.1 m (6.9 ft) working radius, 4-part line |
| Hook hoisting speed | 21.5 m/min (70.5 ft/min) low, 32.5 m/min (106.6 ft/min) high, two-speed wet-disc winch |
| Hoist wire rope | 10 mm diameter x 115 m length, 6xFi(29) IWRC construction, 4-part reeving |
| Gradeability | Not published for this model |
Service capacities (summary)
| Fuel tank | Approximately 80 L (21.1 gal) per the related LC755 platform spec sheet. Not separately confirmed in the LC755-3 factory brochure — verify for the exact S/N 30001-UP build |
| Hydraulic system | Not documented in available sources for this model — consult your dealer or the factory service manual |
| Engine oil | Not documented in available sources for this model — consult your dealer or the factory service manual |
| Cooling system | Not documented in available sources for this model — consult your dealer or the factory service manual |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
LC755-3-EC(S/N 30001-UP) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | Not documented for this exact serial range — verify with your dealer | Not documented for this exact serial range — verify with your dealer |
| Cooling system | Not documented for this exact serial range — verify with your dealer | Not documented for this exact serial range — verify with your dealer |
| Fuel tank | approx. 140 L (37.0 US gal), per published spec sheets for this crane; not confirmed against the factory OMM fill chart | Diesel fuel |
| Hydraulic system and tank | Not documented for this exact serial range — verify with your dealer | Not documented for this exact serial range — verify with your dealer |
| Swing/travel final drives | Not documented for this exact serial range — verify with your dealer | Not documented for this exact serial range — verify with your dealer |
| Grease points | Not documented for this exact serial range — verify with your dealer | Not documented for this exact serial range — verify with your dealer |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu LC755-3-EC(S/N 30001-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 |
|
Servicing the LC755-3-EC(S/N 30001-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Focus on the 4D102E's mechanical injection pump and hydraulic system since there is no ECU to flag faults electronically. Sample engine oil and hydraulic oil at scheduled changes to track wear metals and moisture ingress, especially given the fuel/water separator's role in this configuration. Watch the digital load moment limiter's D1-D9 diagnostic codes as the primary electronic health signal on this crane, and log any repeat code as an early warning before it escalates into a boom, hoist, or sensor failure.
Corrective & Common Repairs
Common failure points on this crane center on the EC solenoid valve block wiring and connectors, boom telescoping cylinder seals, and rubber track wear from tight-radius indoor work. The anti-two-block switch and counter-balance holding valve on the derrick cylinder are frequent troubleshooting targets after nuisance shutdowns. Because the 4D102E uses mechanical injection, injector pump and governor issues are diagnosed manually, not through fault-code readout. Budget shop time accordingly versus a modern electronic engine.
Overhaul & Rebuild Points
Rebuild attention centers on the 5-section telescopic boom's slide pads and wear strips, the slewing ring and reduction gear, and rubber track drive components (sprockets, rollers, idlers) that see heavy cycling on this 9,600 kg (21,164 lb) class crane. Derrick cylinder pins/bushings and the counter-balance valve should be checked for play at major overhaul. Because Komatsu no longer supports telescopic mini cranes directly, source rebuild kits and wear parts through Maeda-authorized channels tied to this platform.
Seasonal & Environment Servicing
This crane's low ground-pressure rubber tracks suit finished floors and paved sites, so seasonal service should check track pad wear and re-tension before frozen or thawed ground shifts driving conditions. In cold climates, verify coolant protection and battery/glow-start condition for the mechanically-injected 4D102E, which lacks electronic cold-start assist beyond factory glow function. In hot or dusty environments, inspect the air cleaner and hydraulic oil cooler more frequently, and drain the fuel/water separator after seasonal fuel changes.
LC755-3-EC(S/N 30001-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 6732-71-6111 | Filter, Fuel - Secondary | Fuel system service | Check fitment → |
| 6732-21-5530 | Cartridge, Engine Oil Filter | Lubrication service | Check fitment → |
| 6162-53-5430 | Packing,Oil Filter And Piping | Lubrication service | Check fitment → |
| 6162-53-5450 | Packing,Oil Filter And Piping | Lubrication service | Check fitment → |
| 600-181-6340 | Element Ass'Y,(Double Element)(Not Shown) | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
LC755-3-EC(S/N 30001-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| D1 | Moment limiter pressure sensor 1 (boom/derrick cylinder) input below criteria | Sensor wiring open or short, disconnected connector, or failed pressure sensor | Check sensor harness and connector for damage, verify sensor supply voltage, replace sensor if reading stays out of range |
| D2 | Moment limiter pressure sensor 1 input above criteria | Sensor wiring short to power, connector corrosion, or failed sensor | Inspect wiring for shorts, check connector condition, replace sensor if fault persists after cycling power |
| D3 | Moment limiter pressure sensor 2 input below criteria | Second pressure sensor circuit open or sensor failure | Check sensor harness and connector, test sensor output, replace if out of spec |
| D4 | Moment limiter pressure sensor 2 input above criteria | Second pressure sensor circuit shorted or sensor failure | Inspect wiring for shorts, verify connector seating, replace sensor if fault repeats |
| D5 | Moment limiter boom angle sensor input below criteria | Angle sensor wiring fault, loose linkage, or sensor failure | Check angle sensor mechanical linkage and wiring, recalibrate or replace sensor as needed |
| D6 | Moment limiter boom angle sensor input above criteria | Angle sensor circuit shorted or sensor drifted out of range | Inspect wiring and connector, recalibrate sensor, replace if still out of range |
| D7 | Moment limiter boom length sensor input below criteria | Length sensor (extension reel/potentiometer) wiring fault or sensor failure | Check length sensor cable and reel mechanism, verify wiring continuity, replace sensor if needed |
| D8 | Moment limiter boom length sensor input above criteria | Length sensor circuit shorted or sensor out of calibration | Inspect wiring, recalibrate boom length sensor, replace if fault persists |
| D9 | AD converter in the moment limiter converter unit not working correctly | Internal converter fault or unstable power supply to the converter box | Power cycle the system; if the code returns, replace the converter unit |
| EO05L / EO05H | Winch-up solenoid valve circuit open (L) or shorted (H) on the electric remote control system | Damaged solenoid coil, broken wiring to the winch-up solenoid, or connector fault | Check solenoid coil resistance and wiring harness, repair or replace the solenoid, then clear and retest |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
LC755-3-EC(S/N 30001-UP) attachments & work tools
Hook block / load block
Standard swing-away hook block rated at roughly 2.45 t (2-part reeving) and 4.9 t (4-part reeving), matched to the boom's rated capacity range for this class of mini crawler crane. Block selection follows the reeving used on the job, not a bolt-on work tool swap.
Main hoist winch and wire rope
Factory winch is spooled with about 10 mm diameter, roughly 115 m long 6xFi(29) IWRC wire rope run in 4-part reeving. Two selectable line speeds are offered, roughly 21.5 m/min and 32.5 m/min depending on drum layer. A winch wire-rope guard is available to shield the drum and rope pay-out point.
Telescopic boom
5-section fully hydraulic telescopic boom extends from about 4.56 m to 15.56 m with elevation from about -2 to 80 degrees. Boom angle, length, and pressure sensors feed the load-moment limiter rather than being separate add-on tools.
Crawler undercarriage / track pad options
Crawler tracks run about 450 mm wide with roughly 2,235 mm of ground contact per side, giving low ground-bearing pressure. Idler cushions and track pads are offered with a steel-shoe or a rubber road-liner option, chosen for hard-surface versus finished-surface work.
Control-system variant (EC vs ME)
This model is built in two control arrangements: EC uses electric/solenoid-valve control of the boom, swing, and winch functions, while the ME variant uses mechanical (manual) valve control. Hydraulic piping and electrical harness routing differ between the two, so any hydraulic-kit work tools or control retrofits must be matched to the EC-specific circuit.
Boom/derrick hydraulic guarding
The derrick (luffing) cylinder carries a counter-balance holding valve to stop boom collapse on a hose failure. The crane also carries an integrated load-moment limiter and anti-two-block cutout as standard factory safety fitment rather than a selectable option.
Outriggers / stability aids
No outrigger or stabilizer-beam option is documented for this exact model and serial range in available sourced material; machines in this mini-crawler-crane class commonly rely on crawler track width alone for stability. Verify outrigger availability and reach with your dealer if extra stability margin is needed.
Jib / boom extension
No fly-jib or lattice boom extension is documented for this model in available sourced material. If greater tip height or radius is required beyond the 15.56 m telescopic boom, confirm any extension option with your dealer.
All LC755-3-EC(S/N 30001-UP) assemblies by section
Every catalogued assembly group for the Komatsu LC755-3-EC(S/N 30001-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
4d102e-1-X Engine S/N 26226159-Up
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Air Cleaner (Single Element Type) (Forwerded Individually Parts)
| 04***10 | Ring,See Fig. K4010-65a0 | 1 |
| 08***0A | Indicator,Dust | 1 |
| 60***40 | Element Ass'Y,(Double Element)(Not Shown) | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Air Connector
| 02***04 | Plug | 1 |
| 67***11 | Connector | 1 |
| 67***10 | Plug, Pipe (1/2-14 Npt) | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Air Heater Wiring
| 08***19 | Cap, At Heater Relay Terminals | 1 |
| 21***50 | Wiring Harness | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Air Intake Heater
| 67***10 | Gasket | 1 |
| 67***11 | Gasket,Air Intake Heater | 1 |
| 67***10 | Harness, Wiring | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Alternator (25a)
| (6***0) | Alternator A. (25a),(See Fig.A601p-02a5) | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Alternator (25a) (Inner Parts)
| 60***10 | Alternator A. (25a) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
| KD***60 | Pulley,Non Hardening | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Alternator Support
| 01***30 | Bolt,(For Trimming Dozer) | 1 |
| 01***11 | Nut (Welded) | 1 |
| 01***23 | Washer,(With Car Heater) | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Alternator Wiring Support
| 01***35 | Bolt, Cover | 1 |
| 61***61 | Spacer | 1 |
| 62***40 | Plate | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Belt Tensioner (For 25a Alternator)
| 67***20 | Bolt (M10x1.50x70) | 1 |
| 67***30 | Tensioner, Belt | 1 |
| 67***20 | Capscrew, Flat Head (M8-1.25x25) | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Breather Hose
| 07***20 | Clamp, Spring Hose | 1 |
| 07***58 | Hose | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Camfollower Cover
| 67***20 | Bolt, Mounting (M8-1.25x16) | 4 |
| 67***10 | Cover, Push Rod | 1 |
| 67***61 | Gasket, Push Rod Cover | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Camshaft
| 67***10 | Camshaft | 1 |
| 67***20 | Support, Camshaft Thrust | 1 |
| 67***31 | Gear, Camshaft | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Caution Plate (Japanese-English)
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Cooling Fan
| 01***55 | Bolt, Mount Dryer To Bracket And Frame | 4 |
| 01***30 | Screw | 4 |
| 60***20 | Fan,Cooling | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Crank Pulley(#26226159-26232220)
| 67***10 | Pulley, Crankshaft | 1 |
| 67***20 | Bolt (M12x1.25x36) | 4 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Crank Pulley(#26232221-)
| 61***60 | Boss | 4 |
| 67***10 | Pulley, Crankshaft | 1 |
| 67***20 | Bolt (M12x1.25x36) | 4 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Crankshaft
| 67***20 | Crankshaft Ass'Y | 1 |
| 67***50 | Gear, Crankshaft | 1 |
| 67***11 | Gear, Crankshaft | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Cylinder Block
| 62***10 | Screw | 1 |
| 62***10 | Seal, O-Ring (M10-1.00) | 3 |
| 67***30 | Block Assembly, Cylinder | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Cylinder Head
| 67***10 | Head Ass'Y | 1 |
| 67***50 | Gasket | 1 |
| 67***70 | Insert, Exhaust | 4 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Drain Plug And Oil Gauge
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
| 61***30 | Gauge | 1 |
| 62***80 | Plug,Drain | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Exhaust Connection
| 67***10 | Stud ((M10x1.50 (Both Ends) X42)) | 4 |
| 67***20 | Nut (M10x1.50) | 4 |
| 67***90 | Gasket, Exhaust Outlet Connection | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Exhaust Manifold
| 07***08 | Plug,(Without Auto Priming System) | 1 |
| 67***10 | Manifold | 1 |
| 67***30 | Bolt, Mounting (M10x1.50x65) | 8 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Fan Drive Pulley
| 01***30 | Bolt,(Water Separator Spec.) | 3 |
| 01***75 | Screw | 1 |
| 67***30 | Support Ass'Y | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Fan Pulley
| 67***50 | Pulley, Accessory Drive | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Flywheel
| 67***20 | Washer, Plain (M12) | 8 |
| 67***30 | Bolt (M12x1.25x32) | 8 |
| 67***00 | Flywheel Ass'Y | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Flywheel Housing
| 07***15 | Plug | 1 |
| 67***20 | Bolt (M8-1.25x16) | 2 |
| 67***30 | Plate, Cover | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Front Cover
| 67***40 | Pin, Timing | 1 |
| 67***50 | Ring, Retaining | 1 |
| 67***60 | Screw, Round Head (M5-0.80x17) | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Front Gear Train Cover
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Fuel Filer Piping
| 07***12 | Gasket,Injection Pump Piping | 2 |
| 67***40 | Tube | 1 |
| 67***10 | Bolt, Banjo Connector (M12-1.50x24) | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Fuel Filter
| 67***11 | Filter, Fuel - Secondary | 1 |
| 67***50 | Adapter, Filter Head | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Fuel Filter Joint
| 07***12 | Gasket,Injection Pump Piping | 3 |
| 61***90 | Joint | 1 |
| 63***60 | Joint | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Fuel Injection Pump (Feed Pump) (Inner Parts)
| DK***20 | Bolt, Joint | 1 |
| DK***00 | Valve,Check | 2 |
| DK***20 | Pump,Priming | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Fuel Injection Pump (Governor) (1/2) (Inner Parts)
| DK***00 | Shim? 2.00mm,(High Altitude Spec.) | 0 |
| DK***00 | Gasket | 1 |
| DK***90 | Governor Ass'Y | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Fuel Injection Pump (Governor) (2/2) (Inner Parts)
| DK***20 | Lever | 1 |
| DK***00 | Gasket | 1 |
| DK***40 | Gasket,Air Compressor | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Fuel Injection Pump (Pump) (1/2) (Inner Parts)
| 67***10 | Injection Pump A | 1 |
| DK***30 | Bearing | 0 |
| DK***20 | Housing | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Fuel Injection Pump (Pump) (2/2) (Inner Parts)
| DK***40 | Shim? 0.50mm, Shim, 0.50mm; Was Dk029311-0040 | 0 |
| DK***90 | Shim? 0.25mm, Shim, 0.25mm; Was Dk029311-0590 | 0 |
| DK***00 | Sleeve,Control | 4 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Fuel Injection Pump And Oil Piping
| 07***12 | Gasket,(Without Air Compressor Type) (K2) | 2 |
| 07***10 | Screw, Banjo Connector (M10-1.25x20) | 1 |
| 62***10 | Seal, O-Ring (M10-1.00) | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Fuel Injection Pump Mounting
| 01***14 | Bolt - Fuel Sensor Mounting | 2 |
| 01***11 | Nut (M14-1.50 Thd), Nut; Was 01582-01411 | 1 |
| 61***61 | Washer, Plain (14mm) | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Fuel Inlet And Outlet Joint
| 61***50 | Connector, Banjo | 1 |
| 61***50 | Joint | 1 |
| 67***40 | Cap,(For Shipping) | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Fuel Lift Pump
| 67***11 | Pump,Suction | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Fuel Piping
| 04***08 | Clip | 1 |
| 61***80 | Spacer | 2 |
| 67***20 | Bolt, Mounting (M8-1.25x16) | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Fuel System Accessories
| 07***12 | Gasket,Injection Pump Piping | 2 |
| 67***60 | Bolt, Mounting (M8-1.25x25) | 1 |
| 67***20 | Bolt, Flange (M8-1.25x20) | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Head Cover (Without Oil Filler Cap)
| 67***30 | Bolt (M8x1.25x25) | 4 |
| 67***50 | Washer, Plain (3/8 Inch) | 4 |
| 67***81 | Gasket, Valve Cover | 4 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Heater Switch (Forwerded Individually Parts)
| 60***70 | Switch,Air Intake Heater | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Injection Nozzle
| 67***00 | Nozzle Holder Ass'Y | 4 |
| 67***60 | Nozzle | 1 |
| 67***50 | Seal, Rectangular Ring | 4 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Muffler
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 4 |
| 01***35 | Bolt,R.H. (For Add. Air Compressor) | 2 |
| 01***06 | Nut | 4 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Oil Cooler Cover
| 67***10 | Connection | 1 |
| 67***20 | O-Ring,Oil Pressure Plug | 1 |
| 67***32 | Gasket,Oil Pressure Plug | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Oil Filler(#26226159-26231194)
| 01***16 | Bolt, Mount Solenoid Valve | 2 |
| 01***30 | Bolt, Mounting - Front Hand Rails | 2 |
| 07***89 | Clamp,(D31s) | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Oil Filler(#26231195-)
| 01***30 | Bolt,(Water Separator Spec.) | 1 |
| 01***30 | Bolt, Mounting - Front Hand Rails | 2 |
| 61***72 | Clamp | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Oil Filter And Piping(#26226159-26231194)
| 01***30 | Bolt,(Water Separator Spec.) | 2 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 2 |
| 01***20 | Screw | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Oil Filter And Piping(#26231195-)
| 01***30 | Bolt,(Water Separator Spec.) | 2 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 1 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Oil Pan And Suction Tube
| 09***50 | Liquid Gasket, Lg-7, 150g | 0 |
| 67***40 | Pan, Oil | 1 |
| 67***60 | Bolt, Mounting (M8-1.25x25) | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Oil Pan Bolt
| 67***10 | Bolt, Mounting (M8-1.25 X 25) | 28 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Oil Piping Elbow
| 67***40 | Elbow | 1 |
| 67***50 | Elbow | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Oil Pressure Switch
| 08***05 | Switch,Engine Oil Pressure | 1 |
| 62***10 | Seal, O-Ring (M10-1.00) | 1 |
| 67***30 | Cartridge, Engine Oil Filter | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Oil Pump
| 67***11 | Pump, Lubricating Oil | 1 |
| 67***20 | Bolt (M8x1.25x30) | 4 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Piston
| 67***00 | Piston Ring Ass'Y | 4 |
| 67***10 | Pin, Piston | 4 |
| 67***20 | Ring, Retaining | 8 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Rear Hanger
| 04***08 | Clip | 1 |
| 08***14 | Clip,(With After Cooler) | 1 |
| 67***10 | Hanger | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Repair Parts (1/4) (Cylinder Head)
| 67***51 | Gasket, Cylinder Head | 1 |
| 67***51 | Gasket, Cylinder Head | 1 |
| 67***10 | Guide, Valve Stem - Intake/Exhaust (Thin Wall) | 8 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Repair Parts (2/4) (Cylinder Block)
| 67***10 | Bushing, Oversize (No. 1 Bore) | 1 |
| 67***20 | Bushing, Oversize (No. 2-5 Bore) | 1 |
| 67***10 | Sleeve, Salvage - Std Bore | 4 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Repair Parts (3/4) (Crankshaft)
| 67***00 | Main Metal Ass'Y | 4 |
| 67***00 | Main Metal Ass'Y | 4 |
| 67***00 | Main Metal Ass'Y | 4 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Repair Parts (4/4) (Piston)
| 67***00 | Piston Ring Ass'Y | 4 |
| 67***10 | Ring,Top | 1 |
| 67***20 | Ring,Second | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Rocker Arm
| 67***40 | Bolt | 4 |
| 67***10 | Rod, Push | 8 |
| 67***60 | Washer, Plain (M19) | 8 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Starting Motor (4.5kw)
| (6***0) | Starting Motor Ass'Y,(4.5kw) (See Fig.A621p-02a0) | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Starting Motor (4.5kw) (Inner Parts)
| 60***10 | Starting Motor Ass'Y | 1 |
| KD***10 | Spring | 1 |
| KD***40 | Pinion | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Starting Motor Mounting
| 67***11 | Gasket,Starter | 1 |
| 67***20 | Bolt, Mounting (M10x1.50x35) | 2 |
| 67***10 | Bolt (M10x1.50x35) | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Stop Solenoid
| 01***20 | Bolt,(With Tachometer Outlet) | 2 |
| 01***35 | Screw | 1 |
| 01***70 | Bolt | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Tachometer Drive Cover
| 67***90 | Cover, Mechanical Tach Drive | 1 |
| 67***20 | Seal, Rectangular Ring | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Tappet
| 67***12 | Tappet, Valve | 8 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Thermostat
| 67***20 | Thermostat | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Thermostat Housing
| 67***40 | Bolt, (M8x1.25x35) | 1 |
| 67***70 | Coupling, Plain Hose | 1 |
| 67***80 | Bolt (M8-1.25x70) | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Under Plate
| 67***50 | Plate, Cylinder Block Stiffener | 1 |
| (0***0) | Liquid Gasket, Lg-7, 150g | 0 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Water Connector
| 67***10 | Connector | 1 |
| 67***20 | Bolt (M10-1.50x75) | 3 |
| 67***30 | Seal,Water Inlet Connection | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Water Connector Plug
| 67***10 | Plug, Pipe (1/2-14 Npt) | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Water Pump
| 67***60 | Bolt (M8x1.25x22) | 2 |
| 67***01 | Water Pump Ass'Y | 1 |
| 67***20 | Seal, Rectangular Ring | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : 4d102e-1-X Engine S/N 26226159-Up : Water Valve And Water Temperature Sensor
| 20***30 | Valve,Heat Water Inlet | 1 |
| 67***10 | Adapter | 1 |
| 78***80 | Sensor,Water Temperature | 1 |
Accessory
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Accessory : General Tools
| MH***05 | Driver,(-) | 1 |
| MH***00 | Tool Set | 1 |
| MH***04 | Driver,(+) | 1 |
Cooling System
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Cooling System : Cooling (Piping And Mounting)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 3 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 3 |
| 07***55 | Clamp, Hose | 3 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Cooling System : Cooling (Radiator And Oil Cooler)
| 01***12 | Bolt,(See Fig.0501) | 11 |
| 01***14 | Bolt | 6 |
| 07***07 | O-Ring - (K7) | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Cooling System : Fan Guard (With Car Cooler)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 3 |
| 01***23 | Washer, Wiring Harness Mounting Bracket | 3 |
| 21***11 | Guard | 1 |
Electrical System
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Electrical System : Battery
| MH***00 | Cable,(+) | 1 |
| MH***10 | Nut | 2 |
| MH***00 | Cable,Engine Earth | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Electrical System : Boom Electrical (Boom Angle Limit Switch)
| MH***00 | Bracket,Limit Switch | 1 |
| MH***25 | Bolt | 4 |
| MH***00 | Boom Limit Switch G | 0 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Electrical System : Boom Electrical (Boom Angle? Length And Pressure Sensor)
| MH***50 | Band | 5 |
| MH***00 | Sensor,Oil Pressure | 2 |
| MH***00 | Guard | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Electrical System : Boom Electrical (Over-Winding Switch)
| MH***00 | Sensor,Over Retracting | 1 |
| MH***50 | Clip,Nylon | 2 |
| MH***40 | Pin,Spring | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Electrical System : Electrical (Boom Harness) (For Ec)
| MH***00 | Wiring Harness,Rotary Lamp | 1 |
| MH***00 | Wiring Harness,Crane Valve | 1 |
| MH***00 | Wiring Harness,Work Lamp? Front | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Electrical System : Electrical (Emo Switch) (For Ec)
| MH***00 | Emo Switch Ass'Y | 1 |
| MH***00 | Emo Switch | 1 |
| MH***00 | Bracket,Emo Switch | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Electrical System : Electrical (Engine Harness) (For Ec)
| 60***70 | Switch,Air Intake Heater | 1 |
| MH***00 | Wiring Harness,Engine | 1 |
| MH***00 | Electrical Wiring G | 0 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Electrical System : Electrical (Floor Frame Harness) (For Ec)
| MH***00 | Wiring Harness,Panel Switch | 1 |
| MH***00 | Wiring Harness,Meter | 1 |
| MH***00 | Wiring Harness,Horn Switch | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Electrical System : Electrical (Work Lamps)
| MH***00 | Work Lamp Ass'Y,Front | 1 |
| MH***00 | Work Lamp Ass'Y,Boom | 1 |
| MH***03 | Washer,Spring | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Electrical System : Instrument Panel (Gauge Cluster)
| 08***00 | Switch,(Sandy And Dusty Terrain S.) | 1 |
| MH***00 | Switch,Cancel? Stop Over Retracting | 1 |
| MH***00 | Switch,Car Heater? High | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Electrical System : Moment Limiter (Controller) (For Ec)
| MH***00 | Buzzer,Caution | 1 |
| MH***10 | Bolt | 1 |
| MH***10 | Nut | 4 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Electrical System : Moment Limiter (Monitor Panel) (For Ec)
| MH***10 | Nut | 4 |
| MH***00 | Box,Indicator Lamp | 1 |
| MH***10 | Bolt | 6 |
Engine Related Parts
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Engine Related Parts : Engine Mount (Air Cleaner)
| 07***80 | Clamp | 2 |
| 08***0A | Indicator,Dust | 1 |
| 62***50 | Air Cleaner Ass'Y | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Engine Related Parts : Engine Mount (Bracket)
| 01***30 | Bolt | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 14 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Engine Related Parts : Engine Mount (Exhaust Muffler Related)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 3 |
| 01***30 | Bolt,(With Body Positioner) | 1 |
| 01***45 | Bolt,(With Water Separator Type) | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Engine Related Parts : Fuel Control
| MH***20 | Pin,Cotter | 1 |
| MH***-0 | End,Wire | 1 |
| MH***30 | Bolt | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Engine Related Parts : Power Take Off
| MH***25 | Bolt | 6 |
| MH***10 | Pin,Spring | 12 |
| MH***00 | Hub | 1 |
Fuel Tank And Related Parts
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Fuel Tank And Related Parts : Fuel Tank (Fuel Line)
| 67***11 | Pump,Suction | 1 |
| MH***05 | Connector | 2 |
| MH***00 | Hose | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Fuel Tank And Related Parts : Fuel Tank (Tank)
| MH***00 | Tank Ass'Y | 1 |
| MH***00 | Sensor,Fuel Level | 1 |
| MH***05 | Filler Cap Ass'Y | 1 |
Guard
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Guard : Front Cover
| MH***10 | Nut | 1 |
| MH***00 | Angle | 2 |
| MH***02 | Washer? Spring,(M10) | 12 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Guard : Left Side Cover
| MH***04 | Washer | 1 |
| MH***14 | Screw | 2 |
| MH***10 | Nut | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Guard : Machinery Compartment
| MH***10 | Nut | 17 |
| MH***25 | Bolt | 6 |
| MH***80 | Trim | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Guard : Rear Cover And Rear View Mirror
| 56***10 | Mirror,(With Under Mirror) | 1 |
| MH***15 | Bolt | 4 |
| MH***03 | Washer,Spring | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Guard : Right Side Cover
| 20***10 | Spring (Welded) | 1 |
| MH***00 | Sheet | 1 |
| MH***00 | Cover,R.H. Side | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Guard : Under Cover
| MH***00 | Cover,Under | 1 |
| MH***00 | Cover,Under | 1 |
| MH***02 | Washer? Spring,(M10) | 10 |
Hydraulic System
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Hydraulic System : 2-Section Solenoid Valve (For Ec)
| MH***00 | Solenoid Valve Ass'Y,2-Section | 1 |
| MH***00 | Bracket Group,2-Section Solenoid Valve | 0 |
| MH***00 | Bracket,2-Section Solenoid Valve (Welded) | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Hydraulic System : Hydraulic Piping (2-Section Solenoid Valve Line) (For Ec)
| MH***30 | Hose | 1 |
| MH***70 | Hose | 1 |
| MH***30 | Elbow | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Hydraulic System : Hydraulic Piping (Delivery Line) (For Ec)
| MH***60 | Elbow | 1 |
| MH***60 | Elbow | 1 |
| MH***02 | Head Ass'Y | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Hydraulic System : Hydraulic Piping (Derrick Cylinder Line) (For Ec)
| MH***00 | Connector,Green-Yellow | 1 |
| MH***56 | Hose | 1 |
| MH***00 | Connector,Black-Yellow | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Hydraulic System : Hydraulic Piping (L.H. Ppc Valve Line 1/2) (For Ec)
| 20***10 | Switch,Swing And Boom Oil Pressure | 1 |
| MH***00 | Adapter | 1 |
| MH***10 | O-Ring | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Hydraulic System : Hydraulic Piping (L.H. Ppc Valve Line 2/2) (For Ec)
| MH***45 | Hose | 1 |
| MH***27 | Hose | 1 |
| MH***30 | Elbow | 5 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Hydraulic System : Hydraulic Piping (R.H. Ppc Valve Line 1/2) (For Ec)
| 20***10 | Switch,Swing And Boom Oil Pressure | 1 |
| MH***00 | Adapter | 1 |
| MH***10 | O-Ring | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Hydraulic System : Hydraulic Piping (R.H. Ppc Valve Line 2/2) (For Ec)
| MH***29 | Hose | 1 |
| MH***29 | Hose | 1 |
| MH***30 | Elbow | 4 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Hydraulic System : Hydraulic Piping (Return Line) (For Ec)
| MH***40 | Hose,Swing | 1 |
| MH***52 | Hose,Swing | 1 |
| MH***10 | Hose,Swing | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Hydraulic System : Hydraulic Piping (Suction Line) (For Ec)
| MH***00 | Hose | 1 |
| MH***00 | Filter Ass'Y,Suction | 1 |
| MH***00 | Hose | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Hydraulic System : Hydraulic Piping (Swing Line) (For Ec)
| 07***23 | O-Ring,(Crusher?Other Att.For Ppc Con | 1 |
| 07***34 | O-Ring,(Not Used When (B) Spec.) | 1 |
| 07***34 | O-Ring, O-Ring,Drain Plug? R.H. Half Tank | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Hydraulic System : Hydraulic Piping (Telescope Cylinder Line) (For Ec)
| MH***00 | Connector,Green-Yellow | 1 |
| MH***60 | Joint,Swivel | 2 |
| MH***00 | Connector,Black-Yellow | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Hydraulic System : Hydraulic Piping (Travel Line)
| 07***23 | O-Ring,(Crusher?Other Att.For Ppc Con | 2 |
| 07***34 | O-Ring,(For 2-Actuater Attachment) | 4 |
| MH***00 | Hose | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Hydraulic System : Hydraulic Piping (Travel Ppc Valve Line) (For Ec)
| MH***00 | Adapter | 1 |
| MH***77 | Hose | 1 |
| MH***72 | Hose | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Hydraulic System : Hydraulic Piping (Winch Brake And 3-Section Solenoid Valve Line) (For Ec)
| MH***45 | Hose | 1 |
| MH***50 | Connector | 1 |
| MH***30 | Elbow | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Hydraulic System : Hydraulic Piping (Wintch Line) (For Ec)
| MH***68 | Hose | 1 |
| MH***00 | Connector,Green-Yellow | 2 |
| MH***00 | Valve Ass'Y,Winch | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Hydraulic System : Hydraulic Tank (Mounting)
| MH***00 | Grommet | 2 |
| MH***00 | Band Ass'Y | 2 |
| MH***00 | Sheet,Rubber (Bonded) | 6 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Hydraulic System : Hydraulic Tank (Tank)
| MH***00 | Filter Ass'Y,Return | 2 |
| MH***24 | Pipe Ass'Y | 2 |
| MH***21 | O-Ring | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Hydraulic System : Main Pump
| MH***00 | Pump Ass'Y | 1 |
| MH***03 | Washer,Spring | 4 |
| MH***70 | Bolt | 4 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Hydraulic System : Main Valve (Mount Bracket)
| MH***10 | Nut | 4 |
| MH***00 | Control Valve Ass'Y | 1 |
| MH***02 | Washer? Spring,(M10) | 8 |
Main/Revolving Frame And Related Parts
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Main/Revolving Frame And Related Parts : Revolving Frame
| MH***00 | Weight,Additional | 1 |
| MH***20 | Bolt | 4 |
| MH***55 | Trim | 2 |
Marks And Plates
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Marks And Plates : Marks And Plates (English) (For Ec)
| 09***00 | Plate? Mark,Komatsu?(Counter Weight) | 3 |
| 09***00 | Tag,(For South And North America) | 1 |
| 20***60 | Plate? Caution,Hydraulic Oil Tank Cap | 1 |
Operator'S Compartment And Control System
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Car Cooler (Compressor And Mount)
| 01***20 | Bolt,(For Mono Lever Steering) | 3 |
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Car Cooler (Condenser And Receiver)
| 01***14 | Screw | 6 |
| 01***16 | Bolt - Box Mounting | 2 |
| 01***16 | Bolt - Seat And Tether Belt Mounting | 6 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Car Cooler (Cooler Hose)
| 01***16 | Bolt - Box Mounting | 4 |
| 01***23 | Washer,(With Auto Emergency Steering) | 4 |
| 08***04 | Conduit | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Car Cooler (Cooler Unit? Mount And Piping)
| 01***16 | Bolt - Box Mounting | 1 |
| 01***20 | Bolt,(Without Air Con.) | 4 |
| 01***23 | Washer,(Without Air Con.) | 4 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Car Heater (Mounting And Hose)
| 09***00 | Clamp,(With Car Heater) | 4 |
| 20***10 | Heater Ass'Y | 1 |
| MH***00 | Hose | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Compressor
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Cooler Unit
| 21***10 | Cooler Ass'Y | 1 |
| TW***00 | Clamp,Tube | 1 |
| TW***70 | Switch,Fan | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Floor Frame (Acceleration Control) (Accelerator Lever)
| MH***00 | Cable,Accelerator | 1 |
| MH***25 | Bolt | 2 |
| MH***02 | Washer,Spring | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Floor Frame (Acceleration Control) (Accelerator Pedal)
| MH***00 | Link | 2 |
| MH***10 | Nut | 2 |
| MH***00 | Pin,Arm | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Floor Frame (Floor Frame)
| 01***90 | Capscrew | 4 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 4 |
| 07***25 | O-Ring,Corrosion Resistor | 4 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Floor Frame (L.H. And R.H. Control Lever)
| 20***10 | Switch,Swing And Boom Oil Pressure | 1 |
| MH***20 | Bolt | 8 |
| MH***00 | Control Lever Group,Crane | 0 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Floor Frame (L.H. Side Instrument Panel)
| MH***00 | Box,Control Lever | 1 |
| MH***06 | Washer | 4 |
| MH***10 | Nut | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Floor Frame (Operation Box) (For Ec)
| 20***20 | Adjuster,L.H | 1 |
| 20***30 | Adjuster,R.H | 1 |
| 20***05 | Seat Ass'Y,Operator'S | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Floor Frame (R.H. Side Instrument Panel)
| MH***10 | Nut | 2 |
| MH***06 | Washer | 3 |
| MH***15 | Bolt | 4 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Floor Frame (Travel Control)
| 20***10 | Switch,Swing And Boom Oil Pressure | 1 |
| MH***00 | Travel Control G | 0 |
| MH***00 | Block,Lever | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Front Guard (Half Guard)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
| 20***80 | Guard,Front | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Heater Unit
| 20***10 | Heater Ass'Y | 1 |
| ND***41 | Radiator | 1 |
| ND***11 | Clamp | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Operator'S Cab (Accessory Parts)
| 01***16 | Screw,(Sandy And Dusty Terrain S.) | 2 |
| 01***20 | Screw | 2 |
| 01***05 | Washer,(Without Window Washer) | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Operator'S Cab (Am Radio)
| 01***08 | Screw - Holder | 4 |
| 01***10 | Screw,(For Wiper Switch Earth) | 3 |
| 01***08 | Washer,(For Fixed Type Ripper) | 7 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Operator'S Cab (Bracket)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 4 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 4 |
| 01***12 | Screw,(Additional Sun Visor) | 6 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Operator'S Cab (Cab) (With Half Guard)
| 01***12 | Screw,(For Side Lamp) (Not Shown) | 4 |
| 01***12 | Screw,(With Articulate Indicator) | 2 |
| 01***12 | Screw,(Not Shown) (For Std Cab) | 3 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Operator'S Cab (Door 1/2)
| 01***16 | Bolt - Box Mounting | 4 |
| 01***08 | Screw - Clip Mounting | 5 |
| 01***12 | Screw,(Wa320-1m?1p) | 4 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Operator'S Cab (Door 2/2)
| 01***10 | Bolt,(With Auto Emergency Steering) | 12 |
| 01***16 | Bolt - Seat And Tether Belt Mounting | 7 |
| 01***25 | Bolt,(Without Gps Antenna Bracket) | 4 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Operator'S Cab (Mount)
| 01***40 | Bolt (Op) | 5 |
| 01***80 | Bolt,(With Corrosion Resistor) | 4 |
| 01***05 | Capscrew | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Operator'S Cab (Pull Up)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***12 | Screw,(Not Shown) (For Std Cab) | 2 |
| 01***16 | Screw | 5 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Operator'S Compartment And Control System : Operator'S Cab (Rail)
| 01***16 | Bolt - Box Mounting | 12 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 4 |
| 01***08 | Washer,(For 1 Attachment And Pat) | 12 |
Service Kit And Component Parts
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Service Kit And Component Parts : Service Kit
| MH***11 | Ring,Back-Up (Kit) | 2 |
| MH***-0 | O-Ring (Kit) | 2 |
| MH***20 | O-Ring (Kit) | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Service Kit And Component Parts : Shoe Bolt And Nut Service Kit
| 11***21 | Nut? Shoe (Y0320-K3) | 50 |
| 20***21 | Shoe Bolt And Nut K | 1 |
| 20***11 | Bolt? Shoe (Y0320-K1) | 50 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Service Kit And Component Parts : Shoe Bolt And Nut Service Kit (Road Liner)
| 01***40 | Bolt | 50 |
| 01***11 | Nut,(For Center Guard) | 50 |
| 21***00 | Shoe Bolt And Nut K.,Road Liner | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Service Kit And Component Parts : Swing Motor (1/2)
| 04***18 | Ring,Snap (Itl) | 1 |
| 07***34 | O-Ring,(For 2-Actuater Attachment) | 2 |
| 70***20 | Bushing | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Service Kit And Component Parts : Swing Motor (2/2)
| 07***16 | O-Ring,Suction And Relief Valve | 1 |
| 07***34 | O-Ring,(For 2-Actuater Attachment) | 1 |
| 70***50 | Valve Ass'Y,Relief | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Service Kit And Component Parts : Track Link (Supply Parts)
| 10***71 | Seal,Dust? Regular? W-Type | 148 |
| 10***81 | Seal,Dust? Master? W-Type | 8 |
| 20***20 | Link,Track? L.H | 78 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Service Kit And Component Parts : Travel Motor (1/3) (Hydraulic Motor)
| 04***93 | Ball,Steel | 2 |
| 06***03 | Bearing,Ball | 1 |
| 21***00 | Travel Motor Ass'Y | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Service Kit And Component Parts : Travel Motor (2/3) (Brake Valve)
| 01***30 | Screw | 8 |
| 07***16 | O-Ring,Suction And Relief Valve | 2 |
| 07***34 | O-Ring,(Not Used When (B) Spec.) | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Service Kit And Component Parts : Travel Motor (3/3) (Final Drive)
| 04***12 | Ring, Snap (4) | 3 |
| 04***52 | Ball,Detent | 1 |
| 07***07 | O-Ring - (K10) | 4 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Service Kit And Component Parts : Winch Motor (1/2)
| MH***10 | Pin | 1 |
| MH***70 | O-Ring (Kit) | 2 |
| MH***02 | Ring,Snap | 3 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Service Kit And Component Parts : Winch Motor (2/2)
| MH***40 | Pin | 2 |
| MH***00 | Plug | 2 |
| MH***30 | Bolt | 6 |
Swing Circle And Related Parts
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Swing Circle And Related Parts : Slope Alarme
| MH***10 | Nut | 2 |
| MH***35 | Bolt | 2 |
| MH***02 | Washer,Spring | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Swing Circle And Related Parts : Swing Circle
| 01***80 | Screw | 48 |
| 04***38 | Pin, Dowel | 2 |
| 07***00 | Fitting, Grease - Upper Hinge Pin | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Swing Circle And Related Parts : Swing Machinery (Machnery)
| 04***12 | Ring, Snap (4) | 6 |
| 07***65 | Seal,Oil Output Shaft | 1 |
| 07***00 | Fitting, Grease (Steering Cylinder) | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Swing Circle And Related Parts : Swing Machinery (Related Parts)
| 01***00 | Bolt,(For Front Brake Release) | 12 |
| 01***32 | Washer,(With Auto Emergency Steering) | 12 |
| 07***08 | Plug,See Fig. K4010-63a0 | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Swing Circle And Related Parts : Swing Machinery And Motor
| 01***45 | Bolt,(For 60ton Dump Body) | 8 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 8 |
| 04***38 | Pin, Dowel | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Swing Circle And Related Parts : Swivel Joint (Mount Parts)(#30001-30021)
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 2 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 2 |
| 21***71 | Plate | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Swing Circle And Related Parts : Swivel Joint (Mount Parts)(#30022-)
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 2 |
| 01***26 | Washer,Spring | 2 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 2 |
Travel And Lower Piping
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Travel And Lower Piping : Final Drive
| 01***40 | Bolt,(For Slag Handling) (For Usa) | 24 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 24 |
| (2***0) | Travel Motor Ass'Y,(See Fig.Y1651-01a0) | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Travel And Lower Piping : Lower Hydraulic Line
| 07***23 | O-Ring,(For 2nd Travel Speed) (Op) | 5 |
| 07***34 | O-Ring,(For Without Brake Assistor) | 2 |
| 07***34 | O-Ring,(For 2-Actuater Attachment) | 8 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Travel And Lower Piping : Sprocket
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 24 |
| 20***30 | Bolt | 24 |
| 21***10 | Sprocket | 2 |
Under Carriage
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Under Carriage : Carrier Roller
| 01***85 | Bolt - Flange Mounting | 2 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 2 |
| 04***15 | Ring, Snap | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Under Carriage : Front Idler
| 07***38 | Ring, Seal - Between Sections | 2 |
| 07***08 | Plug (Kit) | 1 |
| 14***16 | Floating Seal Ass'Y,(For D60pl) | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Under Carriage : Idler Cushion (With Rubber Shoe)
| 01***75 | Bolt - Mount 1st Clutch Housing | 8 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 8 |
| 04***15 | Ring,Back-Up | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Under Carriage : Idler Cushion (With Steel Shoe Or Road Liner)
| 01***75 | Bolt - Mount 1st Clutch Housing | 8 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 8 |
| 04***15 | Ring,Back-Up | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Under Carriage : Rubber Shoe (450mm Wide)
| 21***10 | Shoe,Rubber | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Under Carriage : Track Frame
| 21***11 | Frame,Track | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Under Carriage : Track Frame Cover
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 4 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Under Carriage : Track Guard (With Rubber Shoe)
| 07***18 | Plug,(With Extinguisher) (D31p) | 16 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Under Carriage : Track Guard (With Steel Shoe Or Road Liner)
| 01***35 | Capscrew - M14 (1)/(2) | 16 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 16 |
| 21***10 | Guard | 4 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Under Carriage : Track Roller
| 01***65 | Bolt | 40 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 40 |
| 07***32 | O-Ring,Drain Plug? Main Clutch | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Under Carriage : Track Shoe (Road Liner) (450mm Wide)
| 01***40 | Bolt | 312 |
| 01***11 | Nut,(For Center Guard) | 312 |
| 10***71 | Seal,Dust? Regular? W-Type | 148 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Under Carriage : Track Shoe (Triple Grouser With Hole) (450mm Wide)
| 10***73 | Bushing,Master | 4 |
| 10***71 | Seal,Dust? Regular? W-Type | 148 |
| 10***81 | Seal,Dust? Master? W-Type | 8 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Under Carriage : Track Shoe (Triple Grouser With Hole) (For City Pad) (450mm Wide)
| 10***71 | Seal,Dust? Regular? W-Type | 148 |
| 10***81 | Seal,Dust? Master? W-Type | 8 |
| 11***21 | Nut? Shoe (Y0320-K3) | 312 |
Work Equipment
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Work Equipment : Boom (1/5) (1st Boom)
| MH***01 | Shim? 1.0mm,Foot Pin | 2 |
| MH***00 | Pin,Derrick Cylinder Rod | 1 |
| MH***10 | Nut | 4 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Work Equipment : Boom (2/5) (2nd Boom)
| MH***00 | Plate,Slide? Rear Side | 2 |
| MH***10 | Nut | 4 |
| MH***04 | Ring,Snap | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Work Equipment : Boom (3/5) (3rd Boom)
| MH***00 | Pin,No.5 Boom Extended Rope | 1 |
| MH***00 | Pin,Telescope Cyl. Guide Roller | 1 |
| MH***10 | Nut | 4 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Work Equipment : Boom (4/5) (4th Boom)
| MH***00 | Coller,No.5 Boom Retraction Sheave | 2 |
| MH***00 | Pin,Telescope Cyl. Guide Roller | 1 |
| MH***00 | Plate,Slide? Rear Side | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Work Equipment : Boom (5/5) (5th Boom)
| MH***00 | Plate,Slide? Rear Side | 2 |
| MH***14 | Bolt | 4 |
| MH***10 | Nut | 4 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Work Equipment : Derrick Cylinder (Counter Balance Valve)
| MH***-0 | Valve Ass'Y,Counter Balance | 1 |
| MH***-0 | O-Ring (Kit) | 1 |
| MH***-1 | Ring,Snap | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Work Equipment : Derrick Cylinder (Cylinder)
| MH***16 | Orifice | 1 |
| MH***00 | O-Ring (Kit) | 1 |
| MH***05 | Ring,Back-Up (Kit) | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Work Equipment : Derrick Cylinder (Rod Guard)
| MH***30 | Bolt | 2 |
| MH***00 | Guard,Rod | 1 |
| MH***25 | Pin,Spring | 2 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Work Equipment : Hook Block (1.22 Ton)
| MH***00 | Plate,End | 1 |
| MH***12 | Bolt | 1 |
| MH***12 | Pin,Cotter | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Work Equipment : Hook Block (2.45/4.9 Ton)
| MH***35 | Bolt | 2 |
| MH***00 | Cover,Top | 1 |
| MH***16 | Stopper Ass'Y,Rope | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Work Equipment : Hook Holding Cam
| MH***00 | Holding Cam Ass'Y | 1 |
| MH***00 | Roller Ass'Y | 1 |
| MH***15 | Bolt | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Work Equipment : Telescope Cylinder (Counter Balance Valve)
| MH***-0 | O-Ring (Kit) | 1 |
| MH***-1 | Ring,Snap | 1 |
| MH***-0 | Valve Ass'Y,T Counter Balance | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Work Equipment : Telescope Cylinder (Cylinder)
| MH***07 | Piston,No.1 | 1 |
| MH***14 | Tube,No.2 Cylinder | 1 |
| MH***70 | Bolt | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Work Equipment : Telescope Cylinder (Mechanical Check Valve)
| MH***-0 | Service Kit,T.Cyl. Mechanical Check Valve | 1 |
| MH***00 | Check Valve Ass'Y,Mechanical | 1 |
| MH***-0 | O-Ring (Kit) | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Work Equipment : Telescope Cylinder (Sequence Valve)
| MH***-0 | Service Kit,T.Cyl. Sequence Valve | 1 |
| MH***-1 | Valve Ass'Y,Sequence | 1 |
| MH***-0 | O-Ring (Kit) | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Work Equipment : Winch (Mounting And Snap Sheave) (For Ec)
| MH***00 | Collar | 2 |
| MH***00 | Wedge | 1 |
| MH***00 | Arm,Roller | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Work Equipment : Winch Falling Stop System (For Ec)
| MH***00 | Bracket,Arm | 1 |
| MH***00 | Plate,Limit Switch | 1 |
| MH***00 | Plate,Limit Switch | 1 |
Komatsu : Lc755-3-Ec(S/N 30001-Up) : Work Equipment : Winch Wire Rope Guard
| MH***00 | Joint | 2 |
| MH***00 | Winch Wire Guard G | 0 |
| MH***00 | Bar | 1 |
LC755-3-EC(S/N 30001-UP) serial number reference
The PIN/serial plate on the LC755-3 is riveted to the crawler frame or the machine base near the undercarriage, close to where the load chart and engine data plates are mounted; check the base frame or operator cab support if not visible on the track frame. This crane's serial does not use a classic 3-letter industrial PIN prefix - the plate reads the model designation (LC755-3-EC or LC755-3-ME) followed by a plain sequential number starting at 30001, so the EC/ME suffix on the model tag is what separates the two build configurations, not a prefix ahead of the serial digits.
| Prefix | Identifies | Notes |
|---|---|---|
| EC | LC755-3-EC (S/N 30001-UP) mini crawler crane, CE/European electrical-safety configuration | Parts catalogs list an EMO (emergency machine-off) switch and related wiring/hydraulic-piping sections tagged specifically "FOR EC" that the ME configuration parts book cross-references separately, pointing to a distinct electrical/safety package on the EC build. Shares the same 30001-UP serial start as the ME configuration, so EC/ME reads as a model-suffix split rather than a distinct serial-plate prefix. Confirm with dealer. |
| ME | LC755-3-ME (S/N 30001-UP) mini crawler crane, alternate export configuration | Sold alongside the EC configuration from the same 30001-UP serial start; parts catalogs list ME with its own electrical/hydraulic sections distinct from the EC-tagged parts. Exact regional meaning of "ME" not documented in available sources. Confirm with dealer. |
Frequently asked questions
What engine powers the Komatsu LC755-3-EC?
A Komatsu 4D102E four-cylinder diesel, 3.9 L displacement, rated 40.5 kW (55 PS) at 1,750 rpm with mechanical, non-ECU fuel injection. This differs from the earlier base LC755 platform, which used a larger 44.2 kW (60 PS) engine at 2,000 rpm.
What is the operating weight of the LC755-3-EC?
9,600 kg (21,164 lb) for the -3 series, S/N 30001-UP. The earlier base LC755 platform, without the -3 suffix, weighed 8,800 kg (19,401 lb).
What replaced the Komatsu LC755-3-EC?
No successor model is documented in available sources. Komatsu no longer manufactures telescopic mini crawler cranes, and this EC configuration appears to be the last generation sold under the Komatsu badge in this class. Check with a Komatsu or Maeda dealer for a current-production equivalent.
What LC755-3-EC(S/N 30001-UP) owners discuss
What engine quirks show up on this crane, and is it really a Komatsu engine?
This crane runs a Komatsu 4D102E four-cylinder diesel. Reported complaints are the usual mid-life diesel symptoms rather than a design flaw: gradual power loss, rising fuel burn, or overheating traced to a dirty air filter, worn injectors, or a plugged radiator/hydraulic-oil cooler stack. On machines with a couple decades of service, a weeping oil pressure switch is a known age-related seep and not a sign of bottom-end wear. Keep the air intake and cooling fins clean in dusty yards and this engine holds up well.
How does the hydraulic system behave, and what's the story with outrigger drift?
Like other outrigger-equipped mini cranes in this class, slow cylinder settling under load is usually a worn rod seal or a check valve that isn't holding, not a pump problem. Any visible weep at an outrigger jack, or the crane settling out of level partway through a lift, is treated as a stop-work item by experienced operators, not something to work around. Have your dealer verify outrigger cylinder and valve integrity, and reseal as needed, before the crane goes back into service.
What undercarriage wear pattern is typical for a rubber-tracked mini crane like this?
The rubber-track undercarriage gives low ground pressure and lets the crane work on finished floors and pavement, but that soft rubber wears unevenly if track tension isn't checked on a regular interval. Dust and debris packing into the rollers, idlers, and sprockets is the most common driver of accelerated wear reported for machines in this weight class, especially on demolition or masonry sites. Loose tension usually shows up first as a wandering or "walking" feel in turns before any visible track damage appears.
What electrical or sensor problems come up most on this crane class?
The load moment limiter and digital load indicator are the electrical items flagged most often on mini crawler cranes this size. Reported symptoms include nuisance cutouts, calibration drift after a load cell or its cable has been disturbed, and corroded connectors at the boom-base harness on machines stored outdoors. These are safety interlocks, not nuisances to bypass. Have your dealer verify LMI calibration and harness condition before operating the crane under load.
Any known winch or wire rope habits operators should watch for?
Uneven spooling on the winch drum is a recurring complaint on mini cranes with a short fleet angle between the drum and first sheave — rope can pile up in the center or knife into the lower wraps if the layers aren't seated correctly. Operators are advised to keep the rope under tension while spooling and to always leave several wraps on the drum at full payout so the anchor point is never load-bearing. A rope that looks kinked, birdcaged, or flattened anywhere along its length should be replaced, not worked around.
What should I check before buying a used LC755-3-EC (S/N 30001-UP)?
Match the engine and chassis nameplates against the paperwork and confirm the serial falls in the documented range before anything else — this exact serial window is thin on public documentation, so lean on your dealer for the full service history. Run the engine cold, watch for smoke and listen for injector knock, then cycle every outrigger, the slew, boom telescope, and winch through full range checking for drift, lag, or leaks at every cylinder seal. Check track tension and look for packed debris around the rollers and sprockets. Test the load moment limiter and anti-two-block cutout — do not accept the machine if either can be bypassed or shows nuisance faults. Have your dealer verify LMI calibration, hydraulic cylinder condition, and structural integrity of the boom sections before you sign.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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