Komatsuhydraulic shovels(no series)

Komatsu H285S(S/N G78139)

Maintenance schedule, common problems & OEM parts breakdown

The Komatsu-Demag H285S is a crawler-mounted mining-class hydraulic face shovel built for overburden removal and hard-rock loading in open-pit coal, iron ore, and copper operations. It sits in the roughly 300-335 tonne operating-weight class and runs a single turbocharged 16-cylinder Cummins KTTA50-C diesel (sold in mining trim as the K2000E/K50), a mechanically governed engine with a PT fuel system, about 50 liters displacement, rated in the 1580-1820 hp range depending on the rating and source consulted. Komatsu Demag built the H285S from roughly 1998 to 2005 as a mid-size step in the Demag H-series lineup, above the smaller H185-class shovels and below the H455S and flagship H685. It followed the H241 platform that Demag fielded from the late 1970s, and after Komatsu's full buyout of the Demag mining line the model was eventually superseded by the Komatsu PC4000. It was offered as a front loading (face) shovel with a pin-on dipper and bucket, no quick coupler at this weight class, and a Hydropilot three-circuit hydraulic system feeding boom, stick, bucket, and swing independently.

Across its production run the H285S saw running changes typical of a mechanically governed mining machine rather than a clean generational split: fuel system and governor calibration updates on the Cummins engine, undercarriage and pin-bushing wear-life revisions, and Hydropilot valve and pump tuning changes tied to serial-number breaks rather than a renamed model. These shovels were built to individual mine-site power and reach requirements, so dipper length, bucket profile, and counterweight can differ machine to machine even within the same production run; specs quoted for the model name in general may not match a given unit's actual build sheet. Today the H285S sits in a defined niche of the used and parts market. It is a pre-electronic, mechanically simple machine compared to later Tier-rated Komatsu shovels, valued by operators who want to avoid ECM-based diagnostics and who can support a Cummins KTA50-family engine and Demag-legacy hydraulics. Surviving units are mostly older overburden shovels kept running through rebuilds, and demand centers on undercarriage, pin and bushing, hydraulic pump and valve, and Cummins KTA50 powertrain components rather than complete-machine sales.

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 H285S(S/N G78139) specifications

Engine

Type	16-cylinder turbocharged diesel
Manufacturer	Cummins, KTTA50-C family (mining-trim code K2000E)
Gross power	approx. 1,183 kW (1,583 hp)
Net power	approx. 1,178-1,358 kW (1,580-1,820 hp) at 1,800 rpm, varies by rating point/configuration
Displacement	50.3 L (3,070 cu in)
Cylinders	16, V-configuration
Aspiration	Turbocharged
Emissions tier	Not documented for this era/model — pre-dates modern tiering; verify with dealer if relevant

Weights

Operating weight	approx. 335,000 kg (738,500 lb)
Shipping weight	Not published — this class ships disassembled; obtain rigging weight breakdown from factory documentation
Ground pressure	approx. 193 kPa (28 psi)

Dimensions

Width over tracks	6.45 m (21.2 ft)
Track gauge (centerline to centerline)	5.25 m (17.2 ft)
Track shoe width	1.2 m (47.3 in)
Ground clearance	0.96 m (37.7 in)
Upper structure ground clearance	2.99 m (9.8 ft)
Track length on ground	6.25 m (20.5 ft)
Track length, overall	8.38 m (27.5 ft)
Height to top of cab	7.81 m (25.6 ft)
Height to top of boom (bucket raised)	7.82 m (25.7 ft)
Rear swing radius (tail)	6.15 m (20.2 ft)
Overall length, working config with bucket	14.2 m (46.6 ft)
Transport (disassembled) dimensions	Not published for this class — this size shovel is broken down for road/rail shipment; confirm rigging plan with factory service documentation

Performance

Max travel speed	approx. 1.9 km/h (1.2 mph)
Swing speed	approx. 3.3 rpm
Max digging/loading radius	approx. 14.7-17 m (48.2-55.8 ft), varies by dipper/configuration
Max digging depth	approx. 3.15 m (10.3 ft) — shallow figure is normal for a face-shovel front, which loads from a bench above track level rather than digging below grade
Max dump/unloading height	approx. 12.7 m (41.7 ft)
Max cutting height	approx. 17.5 m (57.4 ft)
Bucket capacity	approx. 17.3 m³ (22.7 yd³)
Breakout/tear-out force	approx. 1,200-1,300 kN, varies by configuration
Gradeability	Not published — not typically rated for this machine class

Service capacities (summary)

Fuel tank	approx. 4,570 L (1,207 gal)
Hydraulic system	approx. 2,960 L (782 gal)
Engine oil	Not published in available spec databases — verify with Komatsu/Cummins service literature
Cooling system	Not published in available spec databases — verify with Komatsu/Cummins service literature

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

H285S(S/N G78139) fluids & capacities

System	Capacity	Recommended fluid
Engine crankcase (with filter)	Not documented in available sources for this serial or model-wide — verify with dealer/OMM before service	Heavy-duty diesel engine oil per API CI-4/CH-4 (Komatsu-class EO15W40-DH equivalent). SAE 15W-40 for temperate/hot climates; SAE 10W-30 for cold-start service below freezing
Cooling system	Not documented in available sources for this serial or model-wide — verify with dealer/OMM before service	Corrosion-inhibited ethylene-glycol extended-life coolant/antifreeze (Komatsu-class Super Coolant AF-NAC or engine-builder equivalent). Richer glycol blend for sub-zero climates, standard blend for temperate regions
Fuel tank	approx. 4,570 L (1,207 gal)	Ultra-low-sulfur diesel per engine-builder spec. Use winter-grade or cold-flow-additive blend below freezing to prevent fuel gelling
Swing (house rotation) drive gearbox	Not documented in available sources for this serial or model-wide — verify with dealer/OMM before service	Extreme-pressure gear oil per API GL-5 (Komatsu-class powertrain oil equivalent). SAE 30 for temperate/hot climates, SAE 10W for cold climates
Final drive / travel gearbox (each track)	Not documented in available sources for this serial or model-wide — verify with dealer/OMM before service	Extreme-pressure gear oil per API GL-5, SAE 80W-90 (Komatsu-class equivalent). Drop to a lighter viscosity grade for cold-climate startup
Hydraulic system (tank and circuit)	approx. 2,960 L (782 gal) total system; reservoir-only split not separately documented	Anti-wear hydraulic oil, ISO VG46, DIN 51524 Part 2 class HLP (Komatsu-class equivalent). ISO VG32 for cold climates, ISO VG68 for sustained high ambient heat
Grease (chassis pins, bushings, slew ring) — spec only	Not applicable — grease-gun lubrication at scheduled points, no reservoir capacity	Multipurpose lithium-complex EP grease, NLGI grade 2 for general service. NLGI 1 or 0 in cold climates for easier gun feed

Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.

Komatsu H285S(S/N G78139) maintenance schedule

Service interval	Tasks
Every 50 h	Check engine oil and coolant level on the KTTA50-C before start-up and top off as needed. Drain water and sediment from the primary and secondary fuel filters/water separators. Walk the crawler tracks and check track tension, shoe bolts, and pad wear. Grease boom, stick, and bucket pin points and the swing bearing race per the lubrication schedule. Check hydraulic tank fluid level and inspect hose runs for chafing or seepage. Listen for abnormal noise from the swing drive and travel motors during first movements of the shift.
Every 250 h	Change engine oil and full-flow/bypass filters on the Cummins KTTA50-C. Pull engine oil and hydraulic oil samples for lab analysis and log against baseline. Clean or replace engine air intake pre-cleaners and check turbocharger boot clamps. Inspect and re-torque bucket teeth, adapters, and dipper pins for wear. Check swing gear and travel reduction gear oil levels. Inspect the main hydraulic pump drive coupling and oil cooler fins for debris.
Every 500 h	Replace hydraulic return-line and pilot filters. Change swing drive and travel (final drive) gear oil. Check crawler track sag and rotate or reface worn track shoes as needed. Test radiator and hydraulic oil cooler fan drive belts and hub bearings. Inspect boom and stick cylinder rod seals for weeping and grease all cylinder pivot pins.
Every 1,000 h	Change fuel filters and inspect the Cummins PT fuel pump and governor linkage for wear and free play. Flush and inspect the engine cooling system and pressure-test the radiator cap and hoses. Change hydraulic tank oil, or confirm via oil analysis it can run to an extended interval, and clean suction strainers. Check swing bearing bolt torque and inspect the bearing race for play. Inspect undercarriage rollers, idlers, and sprockets for wear and check track link pitch elongation. Check turbocharger shaft play and boost/wastegate linkage.
Every 2,000 h	Adjust engine valve lash and injector settings on the KTTA50-C per the Cummins PT service schedule. Replace swing and travel gearbox oils and inspect gear teeth through the inspection cover. Pressure and flow test the main hydraulic pumps and control valve bank for internal wear. Replace major hydraulic hoses that have reached their age or heat-cycle limit regardless of visual condition. Inspect the counterweight mounting and upper frame structure for cracking. Recalibrate the mechanical governor and fuel rack linkage.
Every 4,000 h	Pull, inspect, and rebuild the turbocharger. Inspect piston rings, liners, and main/rod bearings on the KTTA50-C and renew any beyond wear limits. Rebuild the main hydraulic pumps and the swing and travel motors. Renew crawler track chains, rollers, and idlers at the end of undercarriage wear life. Renew boom, stick, and bucket pin-and-bushing joints as a full set. Inspect and recertify the upper structure, boom foot pins, and counterweight attachment before returning to service.

Servicing the H285S(S/N G78139) beyond the schedule

Predictive Maintenance & Fluid Analysis

With no ECM or fault codes on this pre-electronic KTTA50-C powertrain, condition monitoring relies on scheduled oil sampling, not onboard diagnostics. Pull engine oil, Hydropilot hydraulic tank oil, and swing/travel gearbox oil samples every 250 hours and trend wear metals, especially copper and iron from the swing bearing and travel reduction gears. Check coolant for chemical balance given the KTTA50-C's cooling load, and log crawler track pin and bushing wear rates, since undercarriage elongation on a shovel this heavy accelerates fast once past mid-life.

Corrective & Common Repairs

Recurring repair points on the H285S(G78139) center on the Hydropilot three-circuit hydraulic system: main pump wear, control valve spool sticking, and cylinder rod seal weeping under heavy face-shovel loading cycles. Swing bearing and swing drive gear wear is common given the repetitive dig-swing-dump cycle at this weight class. On the Cummins KTTA50-C, watch the PT fuel pump and mechanical governor linkage for drift and injector wear. Boom foot, stick, and bucket pin-bushing joints wear steadily and are a routine replacement item, along with crawler track shoes and rollers.

Overhaul & Rebuild Points

Major rebuild points on the H285S(G78139) follow the duty cycle of a heavy face shovel. Expect a KTTA50-C inframe or top-end overhaul (liners, rings, bearings, turbocharger) once wear limits show in oil analysis, well before any calendar-based schedule. Hydraulic main pumps, swing motors, and travel motors are typically rebuilt as sealed units, not field repaired. Full undercarriage renewal (chains, rollers, idlers, sprockets) and boom/stick/bucket pin-bushing replacement round out the big-ticket jobs; check the upper frame and counterweight mounts for cracking at each overhaul.

Seasonal & Environment Servicing

Open-pit duty puts the H285S(G78139) through extreme dust, heat, and cold depending on the mine site. In hot, dusty pits, clean the radiator and hydraulic cooler fins often and service the engine air pre-cleaners more frequently than the base interval to protect the KTTA50-C turbocharger. In cold climates, switch to a lower-viscosity hydraulic and engine oil grade, use block/coolant heaters before cold starts, and check fuel for wax since the Cummins PT fuel system is mechanical and unforgiving of cold-flow problems. Keep swing bearing and track seals greased against grit.

H285S(S/N G78139) common service parts

Part number	Part	Notes
693 587	Fuel Filter Cartridge With Separator	Fuel system service	Check fitment →
694 402	Element, Generator Set Air Conditioning Equipment Pilot Oil Pump	Air intake service	Check fitment →
692 306	By-Pass - Oil Filter Cartridge, Diesel Engine	Lubrication service	Check fitment →
988 779	Oil Filter Cartridge, Diesel Engine	Lubrication service	Check fitment →
695 835 73	Water Filter - Prechange (15 Dca-Compound) Diesel Engine	Scheduled service item	Check fitment →

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

H285S(S/N G78139) fault codes & troubleshooting

Code	Meaning	Likely cause	What to do
ENGINE OIL PRESSURE LOW (panel lamp + buzzer, no alphanumeric code)	Engine lubrication pressure has dropped below the safe minimum on the big-bore diesel.	Low oil level, worn oil pump, clogged suction screen or filter, or a failed pressure sender/switch.	Shut the engine down at once, check oil level and filter/suction screen condition, and confirm sender operation before restart.
ENGINE COOLANT TEMPERATURE HIGH (panel lamp + buzzer)	Coolant temperature has exceeded the engine protection trip point.	Low coolant level, blocked radiator core, worn or slipping fan drive, or a failing water pump.	Idle down and shut down, let the engine cool, then check coolant level, radiator core, and fan drive before returning to work.
ENGINE OVERSPEED SHUTDOWN (lamp tied to magnetic pickup / speed switch)	Engine speed exceeded the governor limit and the protective circuit cut fuel.	Governor linkage fault, a lugging or downhill overrun condition, or a fuel pump timing/governor malfunction.	Do not restart until the governor linkage and speed-sensing circuit are checked by a qualified technician.
HYDRAULIC OIL TEMPERATURE HIGH (cab monitor panel indicator)	Hydraulic reservoir/return oil temperature is above the safe working range.	Clogged oil cooler core, low hydraulic oil level, a worn pump generating excess heat, or a cooling fan fault.	Reduce load and idle to cool the system, then check oil level and cooler core/fan operation.
HYDRAULIC RETURN FILTER RESTRICTION / BYPASS (cab monitor panel indicator)	The return-line filter loading indicator shows excessive restriction across the element.	A dirty or loaded filter element, or cold, thick oil at startup giving a false trip.	Recheck once oil is warm; if the indicator stays on, replace the filter element per the maintenance schedule.

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

H285S(S/N G78139) attachments & work tools

Loading bucket (primary work tool)

Front (face) shovel bucket is the only production work tool for this class. Capacity runs roughly 17-19 cubic meters (22-25 cu yd) and about 4 m wide, with the exact figure set by the wear-package and dig-material configuration ordered for the unit.

Bucket lip and tooth system (GET)

Buckets use a bolt-on or weld-on tooth-and-adapter system, most commonly Bofors or ESCO-pattern GET on a plate-lip or spade-nose lip casting. Mechanical, bolt-on lip shrouds and side/wing shrouds protect the lip and sidewalls in abrasive digging.

Wear packages

Buckets are ordered with a wear package matched to the dig material - lighter packages for coal/soft overburden, heavier structural and wear-plate packages for hard rock or ore. This affects bucket weight and effective capacity, so specs vary by configuration.

Bucket mounting / coupling

Bucket is pin-mounted directly to the stick/linkage with heavy pins and bushings; machines in this weight class do not use a hydraulic quick-coupler. Bucket or lip/tooth changes are done with pins and a service crane, not a coupler-based swap.

Front-end configuration

This model was built as a dedicated front (face) shovel loader, not a backhoe. Komatsu's broader large hydraulic mining excavator range offers a backhoe front as an alternative in some size classes, but the documented H285S line is shovel-front only.

Ripper / hard-digging aids

A toolbox-style ripper tooth can be fitted at a bucket corner to assist penetration in hard rock or frozen/hard-to-dig material. This is a bucket-mounted tooth variant, not a separate boom-mounted ripper attachment.

Other hydraulic work tools (hammer, grapple, thumb)

No hydraulic hammer, grapple, or thumb attachment is documented for this weight class. Hydraulic breakers on the market top out at carriers far smaller than this machine, so factory tooling for this shovel is limited to the loading bucket and its GET/wear-package options.

Factory equipment changes / guarding

The machine's own operation manual includes a dedicated section for changing equipment/components, confirming bucket and GET changeouts are a documented factory procedure. Typical factory guarding on machines this size includes reinforced counterweight and undercarriage guards and cab screening, though exact optional guarding content is not itemized in available class documentation.

All H285S(S/N G78139) assemblies by section

Every catalogued assembly group for the Komatsu H285S(S/N G78139). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

* = Variations From Page:

Komatsu : H285s(S/N G78139) : * = Variations From Page : : Accumulator 2x

00***98	Test Socket	2
25***40	Suction Line Dn 60 Bulk Ware, State Length Required	0
30***99	Bolt 20 mm Lg	8
30***99	Bolt	4

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Komatsu : H285s(S/N G78139) : * = Variations From Page : : Distributor Gear

00***98	O-Ring	3
08***21	O-Ring	2
21***99	Pipe ? 10 Bulk Ware, State Length Required	6
21***99	Pipe ? 8 Bulk Ware, State Length Required	5

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Komatsu : H285s(S/N G78139) : * = Variations From Page : : Drip Lube (Molub-Alloy 936 Sf Heavy)

27***40	Grease T3 Hs -40/-10? C / 50 Kg	1
32***40	Grease T2 Hs -20/+10? C /50 Kg	1
50***98	Adhesive Lubrication Spray	1
50***98	Grease T2 -15/+50? C /50 Kg	1

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Komatsu : H285s(S/N G78139) : * = Variations From Page : : Generator 24v /225a

59***40	Engine, Assembly	1
69***06	By-Pass - Oil Filter Cartridge, Diesel Engine	2
69***22	Seal Ring	1
69***25	Starter	2

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Komatsu : H285s(S/N G78139) : * = Variations From Page : : Lube (Molub-Alloy 777-2)

27***40	Grease T3 Hs -40/-10? C / 50 Kg	1
32***40	Grease T2 Hs -20/+10? C /50 Kg	1
50***98	Adhesive Lubrication Spray	1
50***98	Grease T2 -15/+50? C /50 Kg	1

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Komatsu : H285s(S/N G78139) : * = Variations From Page : : Refueling System

00***98	O-Ring	1
00***98	Union	2
00***98	Union	3
15***40	Test - Screw Coupling	1

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Komatsu : H285s(S/N G78139) : * = Variations From Page : : Remote Control Manifold

31***99	Plug	0
31***99	Screw	0
46***40	Threefold Control Plate Assembly	1
49***40	Orifice 1,8	0

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Komatsu : H285s(S/N G78139) : * = Variations From Page : : Wear + Tear Parts, Back Panel

00***98	Grease Nipple	2
00***98	O-Ring	8
00***98	Union	2
14***40	Half Flange	16

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Komatsu : H285s(S/N G78139) : * = Variations From Page : : Wear + Tear Parts, Shell

00***98	Grease Nipple	2
00***98	O-Ring	8
00***98	Union	2
14***40	Half Flange	16

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Air Conditioning System, Heater

Komatsu : H285s(S/N G78139) : Air Conditioning System, Heater : --Compressor

65***40	Compressor	1
76***73	Feather Key	1
76***73	Valve Plate With Seal	1
76***73	Seal Kit	1

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Komatsu : H285s(S/N G78139) : Air Conditioning System, Heater : -Air Conditioning Unit

63***40	Air Conditioning Unit Assembly. Fig-Nos. 02-49	1
69***73	Housing	2
69***73	D.C.-Motor 24	3
69***73	Fan	2

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Komatsu : H285s(S/N G78139) : Air Conditioning System, Heater : -Compressor Drive

00***98	Screw	4
03***99	V-Belt - Set	1
25***40	Solenoid Clutch	1
30***99	Lock Washer	3

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Komatsu : H285s(S/N G78139) : Air Conditioning System, Heater : -Heater

46***40	Heat Exchanger	1
51***40	Heater Consist. Of Fig-Nos: 02-08	1
69***73	Tab 4-Pole	1
69***73	Front Housing	1

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Komatsu : H285s(S/N G78139) : Air Conditioning System, Heater : Air Conditioning Equipment :

Komatsu : H285s(S/N G78139) : Air Conditioning System, Heater : Air Conditioning Lines

00***98	Hose Clip	1
16***40	Profiled Joint Ca. 6000 Lg. Bulk Ware, State Length Required	0
30***99	Screw	20
31***99	Fillister-Head Screw	12

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Komatsu : H285s(S/N G78139) : Air Conditioning System, Heater : Hot-Water-Heater

14***40	Vent Valve From 06123	2
25***40	Hose Fittings 90?	1
25***40	Moulding Material Bulk Ware, State Length Required	0
26***40	Hose Coupling, Heater	2

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Annex

Komatsu : H285s(S/N G78139) : Annex : Colour :

Komatsu : H285s(S/N G78139) : Annex : Display

Komatsu : H285s(S/N G78139) : Annex : Electric Schematic

Komatsu : H285s(S/N G78139) : Annex : Hydraulic Schematic

Komatsu : H285s(S/N G78139) : Annex : Tools And Accessories

Bullclam Bucket Attachment

Komatsu : H285s(S/N G78139) : Bullclam Bucket Attachment : --Hydraulic Cylinder

00***98	Grease Nipple	3
20***40	Turcon-Glyd-Ring	1
26***40	Support Ring	1
26***40	Piston Guide Ring	2

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Komatsu : H285s(S/N G78139) : Bullclam Bucket Attachment : -Clam Cylinder, R.H. / L.H.

31***99	Screw	16
31***99	Bolt (Standard)	8
31***99	Screw (Standard)	8
35***40	Flange Seal	4

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Komatsu : H285s(S/N G78139) : Bullclam Bucket Attachment : -Hydraulic Cylinder

00***98	Grease Nipple	3
25***40	Piston Guide Ring	5
25***40	O-Ring	1
25***40	O-Ring	1

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Komatsu : H285s(S/N G78139) : Bullclam Bucket Attachment : Boom 6,3 M

30***99	Bolt (Standard)	24
30***99	Bolt	5
30***99	Bolt	72
31***99	Screw	96

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Komatsu : H285s(S/N G78139) : Bullclam Bucket Attachment : Boom Cylinder, R.H. / L.H.

31***99	Bolt (Standard)	8
31***99	Bolt	8
36***40	Connector Plate	2
36***99	O-Ring	2

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Komatsu : H285s(S/N G78139) : Bullclam Bucket Attachment : Bullclam Bucket 20,5 M? -

00***98	Grease Nipple	2
00***98	O-Ring	8
00***98	Union	2
14***40	Half Flange	16

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Komatsu : H285s(S/N G78139) : Bullclam Bucket Attachment : Bullclam Bucket Cylinder, L.H.

00***98	O-Ring	1
25***40	Connecting Block	1
30***99	Screw	4
30***99	Bolt	6

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Komatsu : H285s(S/N G78139) : Bullclam Bucket Attachment : Bullclam Bucket Cylinder, R.H.

00***98	O-Ring	1
25***40	Connecting Block	1
30***99	Screw	4
30***99	Bolt	6

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Komatsu : H285s(S/N G78139) : Bullclam Bucket Attachment : Stick 4,3 M

00***98	O-Ring	12
14***40	Half Flange	16
16***40	Screw Plug	4
17***40	Screw Plug	2

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Komatsu : H285s(S/N G78139) : Bullclam Bucket Attachment : Stick Cylinder, R.H. / L.H.

30***99	Cover Plate	4
31***99	Bolt (Standard)	8
31***99	Screw (Standard)	8
31***99	Bolt	8

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Drive

Komatsu : H285s(S/N G78139) : Drive

Komatsu : H285s(S/N G78139) : Drive : --Cold-Start System

30***99	Screw	4
69***03	Valve	1
69***04	Union	1
69***05	Clamp	1

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Komatsu : H285s(S/N G78139) : Drive : --Engine Saver 550

46***40	Rubber Block Support, Engine Monitor	4
50***98	Nut	8
69***53	Hose Nw 5 Bulk Ware, State Length Required	0
69***42	Hose Fittings	8

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Komatsu : H285s(S/N G78139) : Drive : -Air Cleaner

30***99	Bolt	20
30***99	Lock Washer	22
33***99	Nut	22
34***99	Lock Washer	22

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Komatsu : H285s(S/N G78139) : Drive : -Circulation Pump (Oil Cooler)

Komatsu : H285s(S/N G78139) : Drive : -Coupling

30***99	Bolt	12
30***99	Bolt	2
30***99	Bolt	12
44***40	Coupling, Assembly	1

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Komatsu : H285s(S/N G78139) : Drive : -Diesel Engine Arr.

59***40	Engine, Assembly	1
69***06	By-Pass - Oil Filter Cartridge, Diesel Engine	2
69***22	Seal Ring	1
69***25	Starter	2

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Komatsu : H285s(S/N G78139) : Drive : -Engine Mounting

26***40	Rail (Cold Weather Design)	2
30***99	Bolt	4
30***99	Bolt	4
48***40	Stand Of The Bearing	1

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Komatsu : H285s(S/N G78139) : Drive : -Fan Pump (Oil Cooler)

31***99	Screw	1
31***99	Hex Head Bolt	7
34***99	Snap-Ring	1
34***99	Pin	2

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Komatsu : H285s(S/N G78139) : Drive : -Fuel Tank

08***40	Quick Disconnect Coupling	1
08***40	Protection Cap	1
17***40	Screw Plug	1
18***40	Plug, Assembly	1

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Komatsu : H285s(S/N G78139) : Drive : -Gear Oil Filter

59***40	Hydraulic. Filter, Assembly	1
60***40	Plug	1
60***40	Seal	1
69***31	Filter Head	1

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Komatsu : H285s(S/N G78139) : Drive : -Gear Oil Pump

35***40	Hydraulic.-Pump, Assembly	1
68***06	Pair Of Gear	1
69***13	Repair Kit Consist. Of Seal Kit And Fig-Nos: 05,08 And 14	0
98***11	Center Pin	4

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Komatsu : H285s(S/N G78139) : Drive : -Joint Shaft

23***40	Screwdriver - Special Insert	0
32***40	Joint Shaft, Assembly. Fig-Nos: 02-09	1
35***99	Grease Nipple	2
50***98	Plug	1

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Komatsu : H285s(S/N G78139) : Drive : -Main Pump

17***40	Screw Plug	2
17***40	Union	3
18***40	O-Ring	2
21***40	O-Ring	2

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Komatsu : H285s(S/N G78139) : Drive : -Main Pumps, Lube Pump

35***40	Hydraulic.-Pump, Assembly	1
69***10	Seal Kit Fig-Nos: 02,04,06,07 And 21	0
75***20	Circlip	1
75***21	Shaft Seal	1

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Komatsu : H285s(S/N G78139) : Drive : -Measuring- And Pilot Pump

31***99	Screw	2
31***99	Screw	4
34***99	Circlip	1
34***99	Lock Washer	6

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Komatsu : H285s(S/N G78139) : Drive : -Pump Distributor Gear

00***98	O-Ring	3
08***21	O-Ring	2
21***99	Pipe ? 10 Bulk Ware, State Length Required	6
21***99	Pipe ? 8 Bulk Ware, State Length Required	5

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Komatsu : H285s(S/N G78139) : Drive : -Radiator

00***98	Bolt	16
00***98	Screw	4
00***98	Bolt	4
00***98	Nut	4

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Komatsu : H285s(S/N G78139) : Drive : -Valve Block

15***40	Test - Screw Coupling	1
25***40	Screw Plug	2
31***99	Plug	1
31***99	Eyebolt	2

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Komatsu : H285s(S/N G78139) : Drive : Air Cleaner Arrangement

00***98	Clamp 10/15	20
05***40	Cable Protection Hose Pg 7 Bulk Ware, State Length Required	0
14***40	Maintenance Switch	4
21***99	Pipe ? 6x150 mm Bulk Ware, State Length Required	4

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Komatsu : H285s(S/N G78139) : Drive : Coolant Lines

25***40	Radiator Hose Dn 55x300 Lg. Bulk Ware, State Length Required	4
28***40	Thread Piece	1
30***99	Bolt	4
30***99	Bolt	4

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Komatsu : H285s(S/N G78139) : Drive : Cooling Circuit - Pdg

00***98	Union	2
00***98	Union	1
05***04	Cable Shoe	2
05***40	Cable Protection Hose Pg 7 Bulk Ware, State Length Required	0

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Komatsu : H285s(S/N G78139) : Drive : Coupling / Shaft Arrangement

30***99	Screw	4
33***99	Nut M8	4
33***99	Wing Nut	4
34***99	Lock Washer	12

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Komatsu : H285s(S/N G78139) : Drive : Diesel Engine Arrangement

26***40	Lower Part, Engine	1
26***40	Lower Part, Engine	1
30***99	Bolt	8
30***99	Bolt Standard	2

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Komatsu : H285s(S/N G78139) : Drive : Diesel Engine, Attachments

00***98	Clamp	4
05***40	Cable Shoe, Red	2
16***40	Hose (Colourless) Dn 25x1500 Lg. (Glasklar) Bulk Ware, State Length Required	2
25***40	Rubber Grommet	2

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Komatsu : H285s(S/N G78139) : Drive : Distributor Gear Arrangement

26***40	Cover Tube For Sensor	1
30***99	Bolt Standard	8
33***99	Nut (Standard)	16
44***40	Sensor (From 61 031 Up)	1

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Komatsu : H285s(S/N G78139) : Drive : Engine Air Intake Lines

22***40	Suction Hose	11
28***40	Clamp	2
30***99	Bolt	3
33***99	Nut M8	3

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Komatsu : H285s(S/N G78139) : Drive : Engine : Cummins-Diesel

Komatsu : H285s(S/N G78139) : Drive : Fire Wall

30***99	Bolt	7
30***99	Bolt	13
33***99	Nut	13
51***98	Resilient Sleeve 13/25x32	20

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Komatsu : H285s(S/N G78139) : Drive : Fuel Lines

00***98	Union	1
00***98	Socket	1
30***99	Screw	20
30***99	Bolt	2

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Komatsu : H285s(S/N G78139) : Drive : Fuel Tank Arrangement

30***99	Bolt (Standard)	4
30***99	Bolt Standard	2
50***98	Bolt Cold Weather Design	2
50***98	Bolt (Could Weather Design)	4

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Komatsu : H285s(S/N G78139) : Drive : Generator Mounting

00***98	Bolt	1
50***98	Bolt	1
50***40	Bushing	1
69***28	Pulley	1

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Komatsu : H285s(S/N G78139) : Drive : Muffler Arrangement

21***40	Muffler	2
23***40	Half Clamp	4
23***40	Half Clamp	4
28***40	Holding Strap	4

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Komatsu : H285s(S/N G78139) : Drive : Output :

Komatsu : H285s(S/N G78139) : Drive : Power Frame Arrangement

23***40	Console	4
30***99	Bolt	4
30***99	Bolt	12
30***99	Bolt (Standard)	16

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Komatsu : H285s(S/N G78139) : Drive : Pumps Arrangement (Standard)

30***99	Bolt	2
30***99	Bolt	4
30***99	Bolt	4
30***99	Bolt Pin Lock From S/No: 06 120	4

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Komatsu : H285s(S/N G78139) : Drive : Radiator - Fan Drive

00***98	Locking Plate	1
26***40	Flange Shaft, Assembly	1
26***40	Flange Shaft	1
26***40	Washer	4

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Komatsu : H285s(S/N G78139) : Drive : Radiator Arrangement

30***99	Lock Washer	16
30***99	Bolt	8
30***99	Bolt	12
30***99	Screw	12

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Komatsu : H285s(S/N G78139) : Drive : Serial-No. :

Komatsu : H285s(S/N G78139) : Drive : Series :

Komatsu : H285s(S/N G78139) : Drive : Type :

Electric

Komatsu : H285s(S/N G78139) : Electric : -Engine Switch Box

05***40	Cable Shoe, Red	20
05***40	Cable Lug (M6)	5
05***40	Pull Switch	1
05***40	Socket 2-Polig	1

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Komatsu : H285s(S/N G78139) : Electric : -Main Switch Box

05***40	Diode	1
26***40	Pulsing Relay (Movement Signal)	1
27***40	Sleeve Marker	0
27***40	Cable Channel 40x40 Ca. 1200 mm Bulk Ware, State Length Required	0

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Komatsu : H285s(S/N G78139) : Electric : Batteries With Cables

00***98	Pipe Clamp, Rubber Armed	8
08***40	Rubber Plate 20x430x490	10
14***40	Cable Shoe	8
15***40	Battery Switch	2

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Komatsu : H285s(S/N G78139) : Electric : Cables - Diesel Engine

00***98	Clamp 15/15	20
05***40	Rubber Grommet	4
25***40	Rubber Grommet	12
25***40	Rubber Grommet	1

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Komatsu : H285s(S/N G78139) : Electric : Cables - Control Frame

00***98	Clamp 10/15	20
25***40	Housing, Empty	1
32***99	Screw	2
32***40	Rubber Grommet	2

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Komatsu : H285s(S/N G78139) : Electric : Cables - Oil Tank

05***40	Cable Lug, Red	0
25***40	Housing, Empty	1
25***40	Rubber Grommet	1
26***40	Cover Tube For Sensor	3

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Komatsu : H285s(S/N G78139) : Electric : Cables - Remote Control Plate

25***40	Housing, Empty	1
32***99	Screw	6
32***40	Cable (Cold Weather Design) 1 Qmm Bl. Bulk Ware, State Length Required	0
32***40	Thread Pin	0

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Komatsu : H285s(S/N G78139) : Electric : Cables - Superstructure

04***40	Dust Cap	1
04***40	Plug	1
05***40	Flanged Socket	1
14***40	Socket	1

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Komatsu : H285s(S/N G78139) : Electric : Sensor Housing

00***98	Test Union	6
30***40	Cable Union	1
30***99	Bolt	4
30***99	Bolt	4

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Komatsu : H285s(S/N G78139) : Electric : Standard Lighting Equipment (24 V)

00***98	Clamp 15/15	50
05***40	Plug To Fig-No: 17	6
05***40	Socket 2-Polig	7
05***40	Wiring Connection	1

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Komatsu : H285s(S/N G78139) : Electric : Switch- And Junction Boxes Arr.

62***40

Emergency Push Button

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Komatsu : H285s(S/N G78139) : Electric : Warning System

00***98	Clamp 15/15	10
05***40	Cable Shoe	3
05***40	Cable Protection Hose Pg 7 Bulk Ware, State Length Required	0
25***40	Compressor-Single Ton-Horn Consist. Of Fig.-No: 03-05	1

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General View

Komatsu : H285s(S/N G78139) : General View

Komatsu : H285s(S/N G78139) : General View : General View Equipment Bullclam Equipment

Komatsu : H285s(S/N G78139) : General View : General View Shovel Bullclam Equipment

Komatsu : H285s(S/N G78139) : General View : General View Superstructure

Komatsu : H285s(S/N G78139) : General View : General View Undercarriage

Komatsu : H285s(S/N G78139) : General View : Maintenance Parts / Cu-Engine

26***40	Air Cleaner, Cabin Supercharger	1
26***40	Drive Belt, Fan - Radiator	1
69***06	By-Pass - Oil Filter Cartridge, Diesel Engine	2
69***87	Fuel Filter Cartridge With Separator	2

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Hydraulic

Komatsu : H285s(S/N G78139) : Hydraulic : --Air Breather Filter

33***99	Nut	1
44***40	Aeration Filter, Assembly	1
69***89	Socket Housing	1
69***90	Cover	1

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Komatsu : H285s(S/N G78139) : Hydraulic : --Pressure Relief Valve

10***65	O-Ring	1
32***40	Pressure Relief Valve, Assembly. Without Pressure Adjustment	1
50***98	O-Ring	1
50***98	O-Ring	1

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Komatsu : H285s(S/N G78139) : Hydraulic : --Pressure Sequence Stage

10***65	O-Ring	1
49***40	Pressure Sequence Stage Assembly	1
50***98	O-Ring	1
67***30	O-Ring	1

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Komatsu : H285s(S/N G78139) : Hydraulic : --Primary Prv

10***65	O-Ring	1
32***40	Pressure Relief Valve, Assembly. Without Pressure Adjustment	1
50***98	O-Ring	1
50***98	O-Ring	1

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Komatsu : H285s(S/N G78139) : Hydraulic : --Return Oil Filter

10***65	O-Ring	1
33***99	Nut	2
33***99	Nut	1
50***98	O-Ring To Fig-No: 11	1

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Komatsu : H285s(S/N G78139) : Hydraulic : -Accumulator

23***40	Pressure Accumulator, Assembly (Std.)	1
26***40	Pressure Accumulator (Tt), Assembly	1
33***99	Seal Ring	1
36***99	O-Ring	1

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Komatsu : H285s(S/N G78139) : Hydraulic : -Anticavitation Valve

35***40	Anticavitation Valve, Assembly	1
50***98	O-Ring	1
75***73	Seal Ring To Fig-No. 06	2
75***73	Taper	1

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Komatsu : H285s(S/N G78139) : Hydraulic : -Double High Pressure Filter

31***99	Plug	2
31***99	Screw	8
33***99	Seal Ring	2
34***99	Lock Washer	8

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Komatsu : H285s(S/N G78139) : Hydraulic : -Fan Motor

31***99	Screw	2
31***99	Screw	4
34***99	Shim Washer 85x105x0,3	1
34***99	Circlip	1

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Komatsu : H285s(S/N G78139) : Hydraulic : -Filter (Fan)

18***40	Plug, Assembly	1
59***40	Hydraulic. Filter, Assembly	1
60***40	Plug	1
60***40	Seal	1

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Komatsu : H285s(S/N G78139) : Hydraulic : -Filter (Pilot Oil)

59***40	Hydraulic. Filter Assembly	1
60***40	Plug	1
60***40	Seal	1
69***02	Element, Generator Set Air Conditioning Equipment Pilot Oil Pump	1

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Komatsu : H285s(S/N G78139) : Hydraulic : -Filter (Pump Lubrication)

18***40	Plug, Assembly	1
59***40	Hydraulic. Filter Assembly	1
60***40	Plug	1
60***40	Seal	1

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Komatsu : H285s(S/N G78139) : Hydraulic : -Load Limitation Valve

17***40	Plug	3
32***99	Screw	1
32***40	Load Limitation Valve, Assembly	1
33***99	Nut	1

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Komatsu : H285s(S/N G78139) : Hydraulic : -Main Control Block Ng 52

31***99	Eye Bolt	3
31***99	Screw	32
31***99	Screw	32
35***40	Hydraulic.-Control Block, Assembly	1

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Komatsu : H285s(S/N G78139) : Hydraulic : -Main Oil Tank

00***98	O-Ring	1
00***98	Union	2
00***98	Union	3
15***40	Test - Screw Coupling	1

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Komatsu : H285s(S/N G78139) : Hydraulic : -Multi-Station Manifold Blocks

25***40	Solenoid Valve, Parking Brake (Y5) Zur Feststellbremse, Drehgetriebe	2
31***99	Screw	8
31***99	Screw	8
31***99	Screw	4

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Komatsu : H285s(S/N G78139) : Hydraulic : -Non-Return Valve

25***40	O-Ring	2
31***99	Screw	4
35***99	Grooved Drive Stud	2
44***40	Cartridge Valve, Assembly. Consist. Of Fig-Nos: 04-11	1

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Komatsu : H285s(S/N G78139) : Hydraulic : -Oil Cooler

Komatsu : H285s(S/N G78139) : Hydraulic : -One-Way Restrictor

00***98	Seal Ring	1
20***40	O-Ring	1
31***99	Bolt	4
33***99	Nut	1

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Komatsu : H285s(S/N G78139) : Hydraulic : -Remote Control Plate

31***99	Plug	0
31***99	Screw	0
46***40	Threefold Control Plate Assembly	1
49***40	Orifice 1,8	0

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Komatsu : H285s(S/N G78139) : Hydraulic : -Secondary Prv

17***40	Union	3
18***40	Screw Plug	1
40***40	Valve Block	1
40***40	Pressure Relief Valve, Assembly	1

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Komatsu : H285s(S/N G78139) : Hydraulic : -Simplex High Pressure Filter

31***99	Plug	1
31***99	Screw	4
33***99	Seal Ring	1
34***99	Lock Washer	4

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Komatsu : H285s(S/N G78139) : Hydraulic : -Slew Gear Control Block Ng 40

25***40	Valve Disk	1
25***40	Compression Spring	1
31***99	Bolt	8
31***99	Screw	4

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Komatsu : H285s(S/N G78139) : Hydraulic : -Suction Oil Tank

17***40	Union	1
20***40	Dust Muff	1
25***40	Cover	2
26***40	Coupling Sleeve Dn 32	1

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Komatsu : H285s(S/N G78139) : Hydraulic : -Turnable Brake Valve

00***98	O-Ring	2
31***99	Bolt	4
50***98	O-Ring	4
55***40	Brake Valve Assembly	1

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Komatsu : H285s(S/N G78139) : Hydraulic : Control Blocks Arrangement Bullclam Bucket Attachment

16***40	Release Valve	8
29***40	Support, Control Unit	1
30***99	Bolt	3
30***99	Bolt (Standard)	1

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Komatsu : H285s(S/N G78139) : Hydraulic : Control Frame Arr.

08***40	Pressure Relief Valve (10 Bar)	1
18***40	Connection Plate	2
25***40	Clamp	2
25***40	Solenoid Valve, Parking Brake (Y5) Zur Feststellbremse, Drehgetriebe	2

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Komatsu : H285s(S/N G78139) : Hydraulic : Distributor Block - Boom

30***99	Screw	2
31***99	Screw	48
33***99	Nut Standard	48
34***99	Resilient Sleeve	2

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Komatsu : H285s(S/N G78139) : Hydraulic : Distributor Block Arrangement

31***99	Screw	32
31***99	Screw	4
35***40	Flange Seal	8
36***40	Distributor Block	1

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Komatsu : H285s(S/N G78139) : Hydraulic : External Pilot Oil Drain Arr.

30***99	Screw	2
33***99	Nut	2
34***99	Washer	2
37***99	Union	4

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Komatsu : H285s(S/N G78139) : Hydraulic : Fan Drive Arrangement

30***99	Bolt	8
30***99	Bolt Pin Lock From S/No: 06 120	8
30***99	Bolt	12
33***99	Nut	8

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Komatsu : H285s(S/N G78139) : Hydraulic : H.P.Filter - Control Blocks

30***99	Cover Plate	2
31***99	Socket Head Cap Screw	12
31***99	Screw	20
35***40	Flange Seal	3

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Komatsu : H285s(S/N G78139) : Hydraulic : H.P.Filter Arrangement

15***40	Test - Screw Coupling	4
27***40	Plug	1
30***99	Bolt	13
30***99	Bolt	2

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Komatsu : H285s(S/N G78139) : Hydraulic : Load-Sensing

00***98	Union	1
30***99	Bolt	2
37***99	Union	1
37***99	Union	3

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Komatsu : H285s(S/N G78139) : Hydraulic : Main Control Blocks - Dis- Tributor Block

30***99	Bolt	4
38***40	Quad Seal Ring	12
42***40	Pipe Bracket	1
49***40	Pipe Bracket	1

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Komatsu : H285s(S/N G78139) : Hydraulic : Main Control Blocks - Rotary Joint

30***99	Cover Plate	8
31***99	Screw	10
31***99	Screw	16
31***99	Screw	16

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Komatsu : H285s(S/N G78139) : Hydraulic : Main Oil Tank Arrangement

20***40	Dust Plug	1
25***40	Coupler Plug Dn 32	1
25***40	Hose Fittings	1
26***40	Cover Tube For Sensor	3

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Komatsu : H285s(S/N G78139) : Hydraulic : Main Pumps Control

00***98	Test Coupling	2
21***99	Union ? 12 Bulk Ware, State Length Required	0
25***40	Screw Plug	2
37***99	Socket With O-Ring	4

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Komatsu : H285s(S/N G78139) : Hydraulic : Measuring- And Pilot Oil Pump

00***98	O-Ring	1
30***99	Screw	2
30***99	Bolt	3
31***99	Screw	4

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Komatsu : H285s(S/N G78139) : Hydraulic : Oil Cooler - Circulation Pump

00***98	Clamp	1
00***98	Flange Seal	3
14***40	Half Flange	2
14***40	Half Flange	2

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Komatsu : H285s(S/N G78139) : Hydraulic : Oil Cooler - Hoses

14***40	Half Flange	4
14***40	Half Flange	6
30***99	Cover Plate	14
31***99	Screw	12

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Komatsu : H285s(S/N G78139) : Hydraulic : Oil Cooler Arrangement

15***40	Rivet	50
16***40	Profiled Joint Ca. 6000 Lg. Bulk Ware, State Length Required	4
30***99	Bolt	8
30***99	Screw	32

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Komatsu : H285s(S/N G78139) : Hydraulic : Oil Cooler System Arrangement

30***99	Bolt Standard	2
38***40	Oil Cooler System	1
50***98	Bolt Cold Weather Design	8
50***98	Bolt Cold Weather Design	2

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Komatsu : H285s(S/N G78139) : Hydraulic : Pipes - Control Frame

00***98	Test Coupling	3
00***98	Test Socket	1
00***98	Union	1
00***98	Union	1

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Komatsu : H285s(S/N G78139) : Hydraulic : Pipes - Fan Motors

00***98	O-Ring	1
00***98	Union	1
04***40	Half Flange	2
30***99	Screw	2

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Komatsu : H285s(S/N G78139) : Hydraulic : Pipes, Remote Control Plate

21***99	Pipe ? 12 Ca 300mm Bulk Ware, State Length Required	0
34***40	Shuttle Valve	2
37***99	Socket With O-Ring	20
37***99	Union	10

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Komatsu : H285s(S/N G78139) : Hydraulic : Pressure Lines, Main Pumps - High Pressure Filter

Komatsu : H285s(S/N G78139) : Hydraulic : Pumps Lube Lines

00***98	Union	2
14***40	Half Flange	2
31***99	Screw	2
31***99	Screw	4

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Komatsu : H285s(S/N G78139) : Hydraulic : Remote Control Plate Arr.

30***99	Bolt 25 mm Lg	12
30***99	Bolt 35 Lg	6
30***99	Bolt 100 Lg	6
34***99	Lock Washer	12

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Komatsu : H285s(S/N G78139) : Hydraulic : Return Lines, Control Blocks

00***98	Flange Seal	2
14***40	Half Flange	12
14***40	Half Flange	4
30***99	Bolt	4

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Komatsu : H285s(S/N G78139) : Hydraulic : Return Lines, One-Way Restrictors Bullclam Bucket Equipment

00***98	Socket	6
00***98	Union	1
14***40	Half Flange	4
16***40	Screw Plug	1

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Komatsu : H285s(S/N G78139) : Hydraulic : Return Lines, Secondary Prv And One-Way Restrictors

00***98	Union	4
00***98	Union	1
21***99	Pipe ? 10x270 Lg. Bulk Ware, State Length Required	0
37***99	Union	6

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Komatsu : H285s(S/N G78139) : Hydraulic : Secondary Prv Arrangement (Clam Cylinder)

15***40	Test - Screw Coupling	1
21***99	Pipe ? 10x270 Lg. Bulk Ware, State Length Required	0
31***99	Screw	4
34***99	Lock Washer	4

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Komatsu : H285s(S/N G78139) : Hydraulic : Slew Gear - Anticavitation

00***98	Union	2
14***40	Half Flange	4
15***40	Test - Screw Coupling	1
30***99	Screw	2

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Komatsu : H285s(S/N G78139) : Hydraulic : Slew Gear Control Block - Slew Gear Motors

15***40	Test - Screw Coupling	4
30***99	Bolt	2
31***99	Screw	32
31***99	Bolt (Standard)	16

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Komatsu : H285s(S/N G78139) : Hydraulic : Slew Gear, Leackage Lines And Brake Control

00***98	Union	1
00***98	Socket	2
31***99	Screw	12
31***99	Screw	16

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Komatsu : H285s(S/N G78139) : Hydraulic : Slider

31***99	Screw	8
32***99	Screw	16
32***40	Cable Union Pg 9	2
33***99	Bolt	8

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Komatsu : H285s(S/N G78139) : Hydraulic : Suction Lines

00***98	Clamp	1
00***98	Hose Clamp	2
00***98	Clamp	2
00***98	Half Flange	2

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Komatsu : H285s(S/N G78139) : Hydraulic : Suction Tank Arrangement

30***99	Bolt (Standard)	14
33***99	Nut Standard	28
50***98	Bolt (Could Weather Design)	14
50***98	Nut Cold Weather Design	28

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Komatsu : H285s(S/N G78139) : Hydraulic : Tank Lines - Control Frame

00***98	Union	1
30***99	Screw	2
31***99	Screw	2
34***99	Lock Washer	2

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Komatsu : H285s(S/N G78139) : Hydraulic : Valves, Distributor Block Bullclam Bucket Equipment

15***40	Test - Screw Coupling	6
31***99	Bolt	4
31***99	Screw	24
38***40	Quad Seal Ring	18

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Lubrication- And Refueling Equipment

Komatsu : H285s(S/N G78139) : Lubrication- And Refueling Equipment : --Lube Pump

00***98	O-Ring To Fig-Nos. 61,62	2
69***14	Pin	1
69***16	Bush With Thread	1
69***17	Disk	1

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Komatsu : H285s(S/N G78139) : Lubrication- And Refueling Equipment : -Drip - Pinion Lube Station

00***98	Union	1
19***73	Union Nut	1
20***40	Coupling Sleeve Nw 12.5	1
20***40	Protection Cap	1

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Komatsu : H285s(S/N G78139) : Lubrication- And Refueling Equipment : -Lube Station

00***98	Union	1
19***73	Union Nut	1
20***40	Coupling Sleeve Nw 12.5	1
20***40	Protection Cap	1

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Komatsu : H285s(S/N G78139) : Lubrication- And Refueling Equipment : -Metering Valve

26***40	Metering Valve, Assembly	1
26***40	Metering Valve, Assembly	1
27***40	Metering Valve, Assembly	1
55***40	Metering Valve, Assembly	1

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Komatsu : H285s(S/N G78139) : Lubrication- And Refueling Equipment : -Pressure Filter

63***40	Pressure Filter	1
76***73	Element (Greasing)	1
76***73	Repair Kit Consist. Of Fig-Nos. 03-05	0

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Komatsu : H285s(S/N G78139) : Lubrication- And Refueling Equipment : Boom (1-Line) Lube Lines Bcb 6,3m

00***98	Clamp 15/15	30
00***98	Union	8
17***40	Cable Strap	20
26***40	Hose Assembly. Dn 20x3150 mm	1

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Komatsu : H285s(S/N G78139) : Lubrication- And Refueling Equipment : Central Lubrication Bullclam Bucket (1-Line)

00***98	Clamp 10/15	6
00***98	Union	2
00***98	Union	6
14***40	Clamp 20/15	6

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Komatsu : H285s(S/N G78139) : Lubrication- And Refueling Equipment : Electr. Parts Central Lubrication

04***40	Dust Cap	1
04***40	Plug	1
14***40	Socket	1
14***40	Contact Element	1

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Komatsu : H285s(S/N G78139) : Lubrication- And Refueling Equipment : Electrical Equipment

00***98	Clamp 15/15	5
04***40	Dust Cap	5
04***40	Plug	5
05***40	Wiring Connection	1

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Komatsu : H285s(S/N G78139) : Lubrication- And Refueling Equipment : Greases

27***40	Grease T3 Hs -40/-10? C / 50 Kg	1
32***40	Grease T2 Hs -20/+10? C /50 Kg	1
50***98	Adhesive Lubrication Spray	1
50***98	Grease T2 -15/+50? C /50 Kg	1

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Komatsu : H285s(S/N G78139) : Lubrication- And Refueling Equipment : Lube Stations Arrangenent

00***98	Union	2
20***40	Coupler Plug Nw 12.5	2
20***40	Coupling Sleeve Nw 12.5	2
20***40	Protection Cap	2

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Komatsu : H285s(S/N G78139) : Lubrication- And Refueling Equipment : Pinion Lube Lines

31***99	Lock Bolt	4
33***99	Nut M8	2
33***99	Nut	4
34***99	Washer	2

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Komatsu : H285s(S/N G78139) : Lubrication- And Refueling Equipment : Pipes - Drip Lube Station

20***40	Coupling Sleeve Nw 12.5	1
20***40	Protective Plug	1
30***99	Screw	2
37***99	Union	1

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Komatsu : H285s(S/N G78139) : Lubrication- And Refueling Equipment : Pipes - Lube Station

20***40	Coupling Sleeve Nw 12.5	1
20***40	Protective Plug	1
30***99	Screw	4
37***99	Union	1

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Komatsu : H285s(S/N G78139) : Lubrication- And Refueling Equipment : Pipes - Metering Valves, Grease Line System

21***99	Pipe ? 12 Ca 300mm Bulk Ware, State Length Required	0
30***99	Bolt	4
30***99	Screw	16
30***99	Screw	14

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Komatsu : H285s(S/N G78139) : Lubrication- And Refueling Equipment : Refueling System With Supporting Beam

00***98	Clamp 15/15	20
00***98	Union	1
18***40	Limit Switch	1
25***40	Housing, Empty	1

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Komatsu : H285s(S/N G78139) : Lubrication- And Refueling Equipment : Stick (1-Line) Lube Lines Bcb 4,3m

00***98	Clamp 15/15	70
00***98	Union	14
17***40	Cable Strap	50
21***99	Pipe ? 12 Ca 300mm Bulk Ware, State Length Required	0

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Operator'S Cab

Komatsu : H285s(S/N G78139) : Operator'S Cab : -Manipulator

49***40	Socket	1
49***40	Spring Socket	1
49***40	Tab	6
51***40	Contact	11

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Komatsu : H285s(S/N G78139) : Operator'S Cab : -Operation Panel

05***40	Tab To Fig-No: 43 1,5 - 2,5	2
05***40	Grommet	8
05***40	Grommet	1
30***99	Bolt	6

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Komatsu : H285s(S/N G78139) : Operator'S Cab : -Operator'S Cab

00***98	Es-Pin	2
00***98	Es-Pin	1
05***40	Socket 2-Polig	1
05***40	Socket	2

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Komatsu : H285s(S/N G78139) : Operator'S Cab : -Operator'S Cab Support

08***40	Lock Assembly	1
08***40	Handle	1
23***40	Fitting	1
29***40	Door	1

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Komatsu : H285s(S/N G78139) : Operator'S Cab : -Operator'S Seat

76***73	Tilt Adjustment Arr	1
76***73	Safety Belt Assembly., Retractor	1
76***73	Seat Plate Assembly	1
76***73	Control Lever Carrier, R.H	1

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Komatsu : H285s(S/N G78139) : Operator'S Cab : -Sliding Window

49***40	Sliding Window, Assembly, L.H	1
51***98	Screw	16
51***98	Screw	2
51***98	Screw	2

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Komatsu : H285s(S/N G78139) : Operator'S Cab : Cabin : Light Grey

Komatsu : H285s(S/N G78139) : Operator'S Cab : Operator'S Cab - Glazing

08***40	Clamping Section 2800 Lg. (To Fig-Nos. 02,04) Bulk Ware, State Length Required	0
08***40	Filler Section 3000 Lg. Bulk Ware, State Length Required	0
30***40	Rear Window 803x458	1
32***99	Screw	70

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Komatsu : H285s(S/N G78139) : Operator'S Cab : Operator'S Cab Support Arr.

30***99	Bolt Standard	16
50***98	Bolt (Could Weather Design)	16
51***98	Reslilient Sleeve	16

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Komatsu : H285s(S/N G78139) : Operator'S Cab : Operator'S Cab, Arrangement

08***40	Mirror	2
14***40	Sealing 20x4 Bulk Ware, State Length Required	0
16***40	Profiled Joint Ca. 6000 Lg. Bulk Ware, State Length Required	1
30***99	Bolt	6

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Komatsu : H285s(S/N G78139) : Operator'S Cab : Operator'S Stand

30***99	Lock Washer	6
30***99	Bolt	4
30***99	Screw	2
31***99	Screw	12

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Komatsu : H285s(S/N G78139) : Operator'S Cab : Protection Roof

30***99	Bolt	8
51***98	Resilient Sleeve 17/30x50	8
51***98	Resilient Sleeve	8
51***98	Bolt	8

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Komatsu : H285s(S/N G78139) : Operator'S Cab : Protection Roof (With Air Conditioning Equipment, Roof)

30***99	Bolt 25 mm Lg	2
30***99	Bolt	3
31***99	Screw M8 X 50	2
33***99	Nut M8	2

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Komatsu : H285s(S/N G78139) : Operator'S Cab : Windscreen Washing Assy.

19***40	Diaphragm Pump	1
19***40	Water Reservoir	1
19***40	Non-Return Valve	1
19***40	Hose ? 6 4,0m (3,5m+0,5m Lang) Bulk Ware, State Length Required	0

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Slew Gear

Komatsu : H285s(S/N G78139) : Slew Gear

Komatsu : H285s(S/N G78139) : Slew Gear : -Slew Gear

00***98	O-Ring	1
00***98	Union	1
08***50	Shaft Seal	1
21***99	Pipe ? 12 Ca 300mm Bulk Ware, State Length Required	1

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Komatsu : H285s(S/N G78139) : Slew Gear : -Slew Motor

08***74	Component Sealing Applies To Fig-No. 40, 58, 131	0
17***40	Screw Plug	1
31***99	Screw	8
31***99	Screw	14

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Komatsu : H285s(S/N G78139) : Slew Gear : -Slew Ring

00***98	Grease Nipple	36
22***40	Lip Type Seal Ng 25 X 9.200 mm Bulk Ware, State Length Required	1
22***40	Lip Type Seal Ng 40x11000 Lg. Bulk Ware, State Length Required	1
31***99	Screw	18

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Komatsu : H285s(S/N G78139) : Slew Gear : Gear / Motor Arrangement

30***99	Bolt	48
30***99	Bolt	8
30***99	Bolt (Standard)	14
33***99	Nut	4

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Komatsu : H285s(S/N G78139) : Slew Gear : Slew Ring Arrangement

25***40	Hv-Washer	216
32***40	Compound (2 Lbs) (1,3 Kg.)	4
36***40	Bolt (Could Weather Design)	100
36***40	Bolt Cold Weather Design	108

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Komatsu : H285s(S/N G78139) : Slew Gear : Slew Ring Protection

30***99	Bolt	4
50***98	Bolt	20
51***98	Resilient Sleeve 13/25x50	24
51***40	Pinion Cover	1

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Superstructure

Komatsu : H285s(S/N G78139) : Superstructure : Air Cleaner Platform

00***98	Locking Spring	4
31***40	Wing Nut, Plastic	4
31***40	Threaded Block	4
32***40	Grating 480x1200	1

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Komatsu : H285s(S/N G78139) : Superstructure : Counterweight Arrangement

30***99	Bolt (Standard)	4
33***99	Nut (Standard Equipment)	4
48***40	Washer	8
50***98	Nut (Cold Weather Design)	4

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Komatsu : H285s(S/N G78139) : Superstructure : Covering (Doors)

23***40	Hinge To Fig-Nos. 10,11,22	8
30***99	Bolt	8
30***99	Lock Washer	16
30***99	Bolt	9

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Komatsu : H285s(S/N G78139) : Superstructure : Gratings (Engine And Control Blocks)

30***99	Bolt 35 Lg	7
30***99	Bolt	1
30***99	Bolt 100 Lg	6
31***40	Grating 300x660	2

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Komatsu : H285s(S/N G78139) : Superstructure : Rail

Komatsu : H285s(S/N G78139) : Superstructure : Steps

11***99	Cable Clamp	2
30***99	Bolt	1
30***99	Screw	4
30***99	Screw	1

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Komatsu : H285s(S/N G78139) : Superstructure : Steps, L.H.

27***40	Grating 480x750	4
30***99	Lock Washer	2
30***99	Bolt	8
30***99	Bolt	55

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Komatsu : H285s(S/N G78139) : Superstructure : Superstructure Platform

30***99	Bolt Standard	8
33***99	Nut (Standard Equipment)	8
37***40	Freeze-In Bush	4
37***40	Pin, Boom	2

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Undercarriage

Komatsu : H285s(S/N G78139) : Undercarriage

Komatsu : H285s(S/N G78139) : Undercarriage : --Pressure Relief Valve

10***65	O-Ring	1
32***40	Pressure Relief Valve, Assembly. Without Pressure Adjustment	1
50***98	O-Ring	1
50***98	O-Ring	1

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Komatsu : H285s(S/N G78139) : Undercarriage : -Bottom Roller

26***40	Lifetime Seal	2
30***99	Screw	8
31***99	Washer	8
33***99	Seal Ring	1

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Komatsu : H285s(S/N G78139) : Undercarriage : -Brake Valve

10***64	O-Ring	2
25***40	Valve Disk	2
25***40	Compression Spring	2
31***99	Screw	12

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Komatsu : H285s(S/N G78139) : Undercarriage : -Drive Sprocket

25***40	Hv-Washer	12
36***40	Drive Sprocket Hub No Field Repair Item	1
50***98	Nut (Cold Weather Design)	12
50***98	Bolt (Cold Weather Design)	12

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Komatsu : H285s(S/N G78139) : Undercarriage : -Idler Assy.

30***99	Screw	8
31***40	Stop Washer	2
31***99	Washer	8
32***40	Lifetime Seal	2

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Komatsu : H285s(S/N G78139) : Undercarriage : -Rotary Joint

00***98	Grease Nipple	2
17***40	Union	2
30***99	Bolt	8
30***99	Bolt 25 mm Lg	8

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Komatsu : H285s(S/N G78139) : Undercarriage : -Tensioner

17***40	Plug	1
25***40	Test-Screw Coupling	1
31***99	Screw	23
32***40	Piston Guide Ring	3

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Komatsu : H285s(S/N G78139) : Undercarriage : -Top Roller

31***99	Plug	1
32***40	Lifetime Seal	2
34***99	Dowel Sleeve	2
42***40	Roller Bearing	2

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Komatsu : H285s(S/N G78139) : Undercarriage : -Travelling Gear

00***98	Shaft Seal	2
00***98	Shaft Seal	2
30***99	Bolt	1
30***99	Bolt	12

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Komatsu : H285s(S/N G78139) : Undercarriage : -Travelling Motor

Komatsu : H285s(S/N G78139) : Undercarriage : -Valve Block

00***98	Union	1
08***40	Ball Cock Nw 13	1
21***99	Pipe ? 20x75 Bulk Ware, State Length Required	1
21***99	Pipe, Assembly. ? 15x60 Bulk Ware, State Length Required	0

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Komatsu : H285s(S/N G78139) : Undercarriage : Brake Control

37***99	Socket	1
37***99	Socket	1
37***99	Socket	2
37***99	Union	1

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Komatsu : H285s(S/N G78139) : Undercarriage : Brake Valve Arrangement

15***40	Test - Screw Coupling	1
30***99	Bolt	4
31***99	Washer	4

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Komatsu : H285s(S/N G78139) : Undercarriage : Carbody With Rotary Joint

30***99	Bolt (Standard)	3
30***99	Screw	12
30***99	Bolt	2
30***99	Bolt	4

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Komatsu : H285s(S/N G78139) : Undercarriage : Hydraulic :

Komatsu : H285s(S/N G78139) : Undercarriage : Leakage Lines

37***99	Socket	1
37***99	Union	1
37***99	Union	1
37***99	Union	2

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Komatsu : H285s(S/N G78139) : Undercarriage : Mountings Carbody/Side Frame

23***40	Pin Standard	8
25***40	Pin Cold Weather Design	8
30***99	Screw	96
31***99	Washer	96

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Komatsu : H285s(S/N G78139) : Undercarriage : Pressure Lines

30***99	Bolt	8
31***99	Socket Head Cap Screw	48
31***99	Screw	16
32***40	Hose Assembly. Dn 40x1295 Lg	2

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Komatsu : H285s(S/N G78139) : Undercarriage : Track Adjusting

00***98	Test Socket	2
25***40	Suction Line Dn 60 Bulk Ware, State Length Required	0
30***99	Bolt 20 mm Lg	8
30***99	Bolt	4

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Komatsu : H285s(S/N G78139) : Undercarriage : Track Frame

25***40	Hv-Washer	104
30***99	Bolt Standard 160 Lg. Normaltemperatur	8
30***99	Bolt Standard 230 Lg. Normaltemperatur	48
35***40	Nut (Standard)	48

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Komatsu : H285s(S/N G78139) : Undercarriage : Track Group - Drive Sprocket Side

00***98	Union	2
25***40	Hv-Washer	72
25***40	Hv-Washer	24
30***99	Bolt (Standard)	24

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Komatsu : H285s(S/N G78139) : Undercarriage : Track Group, 1200 Mm

33***99	Nut	188
34***99	Washer	188
42***40	Bolt	188
44***40	Pin	188

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Komatsu : H285s(S/N G78139) : Undercarriage : Track Group-Idler Protection

15***40	Test - Screw Coupling	8
30***99	Bolt	12
30***99	Bolt (Standard)	12
30***99	Bolt	8

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H285S(S/N G78139) serial number reference

On this class of Komatsu (Demag) hydraulic mining shovel, the nameplate is a stamped metal plate mounted on the upper frame, typically near the cab entry or counterweight area, carrying the model designation and the plain serial number - there is no alpha PIN-prefix block to decode like on standard excavators. Reading the plate is simply a matter of matching the 5-digit serial to the machine record; because exact plate placement and format are not published for this low-volume mining line, confirm the plate location and any suffix marks with a Komatsu Mining Germany dealer.

Prefix	Identifies	Notes
78xxx (no letter prefix)	H285S hydraulic mining shovel - single production generation	This shovel carries a plain sequential serial, not a 3-letter PIN prefix like Komatsu's mass-production excavators. Factory-issued service and parts documentation for this model spans roughly serial 78067 through 78139, covering units 78067, 78076, 78083, 78094, 78097, 78098, 78104, 78111, 78113, 78124, 78135 and 78139, all one shovel generation. Built at the Dusseldorf-Benrath, Germany plant under the Demag Komatsu joint venture (later Komatsu Mining Germany), roughly 1998-2005 production.
G-prefix (unconfirmed)	possible parts-listing reference code, not a true PIN element	Some parts-listing references render this serial as G78139, but the factory shop and operation manuals for this same serial (and for sibling serials in the run) show a bare numeric serial with no letter in front of it. Treat any G prefix as unverified - confirm with a Komatsu Mining Germany dealer before using it for a parts lookup.

Frequently asked questions

What engine does the Komatsu-Demag H285S(S/N G78139) use?

A single turbocharged 16-cylinder Cummins KTTA50-C diesel (mining-trim code K2000E/K50), about 50 liters displacement, mechanically governed with a PT fuel system. Net power runs roughly 1580-1820 hp depending on rating point and configuration. This generation predates ECM controls, so there are no digital fault codes, only gauges and panel lamps.

What is the operating weight of the H285S(S/N G78139)?

Operating weight for the H285S in this class runs around 335,000 kg (roughly 335 tonnes / 738,500 lb). The exact figure shifts with dipper length, bucket, and counterweight configuration ordered for the specific unit, so treat it as a class figure rather than a fixed number.

What replaced the Komatsu-Demag H285S?

Komatsu carried the H285S forward after its full buyout of the Demag mining line, then superseded it with the Komatsu PC4000 face shovel, which now fills the equivalent mid-size slot in the Komatsu Mining lineup.

What H285S(S/N G78139) owners discuss

What engine does the H285S(S/N G78139) actually run — single engine or twin-engine?

Factory spec data for this shovel lists one turbocharged 16-cylinder diesel rated around 1,180 kW (1,580 hp), roughly 50 L of displacement — the same single-engine layout used across large mining excavators and shovels of this era. Some general write-ups about shovels this size describe a twin-engine arrangement; that layout does exist elsewhere in the mining-shovel world, but it is not what this model's spec sheet shows. Confirm the engine tag on the actual unit rather than assume a twin-engine setup.

How does the hydraulic system behave day to day, and what's the biggest risk to it?

The shovel runs an open-circuit hydraulic system with several main pumps drawing off one large, unpressurized tank (roughly 2,960 L / 782 gal). Independent circuits for the boom and the arm/bucket keep digging motions from robbing flow from each other under load. The tradeoff of one big shared tank is that contamination (water, dirt, or metal shed from a failing pump) spreads through the whole system before it shows up as sluggish cylinders or a noisy pump. Oil sampling and filter discipline matter more here than the hours-since-last-change sticker.

What undercarriage wear pattern should an owner expect on this machine?

The shovel rides on very wide track shoes (about 1,200 mm / 47 in) on a long, hydraulically extendable undercarriage, which keeps ground pressure low for the machine's weight — roughly 193 kPa (28 psi). That does not stop wear: pins, bushings, and rollers carry sustained heavy load on rough pit floor, and links left too long without regreasing can seize in a curved position, a condition track crews call bridging. Track tension and lube intervals need to run tighter than the duty cycle alone suggests, and rollers and idlers are usually the first components to show flat spots.

What electrical or sensor quirks come with a shovel of this age?

This generation predates the full electronic diagnostic systems used on later Komatsu excavators. The cab panel runs on discrete gauges and warning lights tied to individual senders, not a fault-code display. Age-related quirks are typically intermittent gauge readings or warning lights caused by corroded connectors and tired senders, not anything in the control electronics itself. Bench-test the sender and try a known-good gauge before chasing wiring on an erratic reading.

Does this shovel family have a reputation for durability?

Yes. Shovels in this product line have a documented history of running in continuous mining duty for close to three decades before retirement, with major components still good enough to be reused in sister machines rather than scrapped. That kind of life span depends on keeping the maintenance program current — structural inspection, undercarriage attention, and hydraulic fluid care all have to stay on schedule, or the same design that can run for decades will wear out much faster under a neglected program.

Are there known structural trouble spots on the boom or stick?

As with any large welded box-girder boom, the classic fatigue point is the weld toe where webs meet flanges or where gussets terminate, particularly near the boom foot and stick pivot. Cracking here develops slowly under cyclic load and starts as a hairline surface crack, not a sudden failure, so periodic visual and non-destructive inspection of these joints is standard practice on high-hour mining shovels, with shorter intervals as the machine ages or after any hard-digging incident. Have your dealer verify any suspected weld cracking with proper non-destructive testing before the machine goes back into service.

What should a buyer check before purchasing a used H285S(S/N G78139)?

Start with the undercarriage: pin, bushing, roller, idler, and shoe wear is one of the largest cost items on a shovel this size, and it should be measured as a percentage of remaining wear, not eyeballed. Pull a hydraulic oil sample and pressure-test the main pumps and control valves rather than judging by rod appearance alone. Check the slew ring and center (rotary) joint for play and seal weeping, since they carry the full swing load and hydraulic passthrough. Ask for complete service records rather than isolated invoices, and have the boom, stick, and counterweight welds inspected for cracking before committing. Have your dealer verify that the machine's serial-specific documentation matches the unit in front of you, since running changes are common across a production run this size.

Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.

Serial-range & configuration variants

This page covers the Komatsu H285S(S/N G78139). Related factory variants of the same model family:

H285S(S/N G78097)H285S(S/N G78135)H285S(S/N G78124)H285S(S/N G78098)H285S(S/N G78104)H285S(S/N G78111)H285S(S/N G78076)H285S(S/N G78083)H285S(S/N G78110)H285S(S/N G78120)H285S(S/N G78121)H285S(S/N G78113)H285S(S/N G78123)H285S(S/N G78134)

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