Komatsuhydraulic shovels(no series)
Komatsu H65(S/N G26051)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu H65 is a large hydraulic mining shovel engineered for high-volume surface mining operations. The specific unit with serial number G26051 is powered by two Komatsu 3516DE-TA diesel engines, delivering a combined net power of 3714 HP (2770 kW). The machine weighs approximately 1,510,167 lbs (685,000 kg) and features a massive 43.2 cu yd (33.0 m³) reference bucket capacity. It is designed for continuous loading applications with a maximum digging depth of 355 in. (902 cm) and a max dumping height of 552.0 in. (1402.1 cm). Configurations typically include shovel or backhoe setups, with options for various bucket sizes and wear packages to suit abrasive materials like coal, iron ore, or hard rock.
Across the Komatsu hydraulic shovel lineage, generations have evolved from mechanical-hydraulic hybrids to fully electronic, dual-engine systems focused on fuel efficiency and emissions compliance. The H65 series represents a significant step in this evolution, utilizing advanced turbocharged engines and high-capacity hydraulic pumps to maximize cycle times. In the used and parts market, the H65 remains critical because its dual-engine architecture and specialized undercarriage components are distinct from standard construction excavators. Owners rely on the specific serial-numbered parts catalogs for the G26051 range to ensure fitment of high-wear items like track shoes, top rollers, and cylinder seals, which are optimized for the extreme ground pressures and loads inherent to mining shovels.
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 H65(S/N G26051) specifications
Engine
| Model | 3516DE-TA x2 |
| Gross Power | 3730.8 hp (2,781 kw) |
| Net Power | 3714 HP (2770 kW) |
| Displacement | 8421 cu. in. (the OEM part reference,4 cc) |
| Cylinders | 16 |
| Emissions Tier | Not documented for this exact serial range — verify with your dealer |
Weights
| Operating Weight | the OEM part reference lbs (the OEM part reference kg) |
| Loading Shovel Operating Weight | the OEM part reference.the OEM part reference lbs (685,007 kg) |
| Shipping Weight | Not documented for this exact serial range — verify with your dealer |
| Ground Pressure | 35,4 psi (244,1 kPa) |
Dimensions
| Overall Length | 918,0 in. (2331,7 cm) |
| Overall Length with Shovel | 700,8 in. (1780,0 cm) |
| Overall Width | 307,2 in. (780,3 cm) |
| Track Gauge | 248,4 in. (630,9 cm) |
| Ground Clearance | 45,6 in. (115,8 cm) |
| Upper Structure Ground Clearance | 139,2 in. (353,6 cm) |
| Tail Swing Radius | 343,2 in. (871,7 cm) |
| Removal Counterweight Clearance | 140,4 in. (356,6 cm) |
| Shoe Size | 59,1 in. (150,1 cm) |
Performance
| Max Travel Speed | 1.4 mph (2,3 km) |
| Swing Speed | 3.5 RPM |
| Max Digging Depth | 355 in. (902 cm) |
| Max Loading Height | 504,0 in. (1280,2 cm) |
| Max Reach Along Ground | 807,6 in. (2051,3 cm) |
| Max Digging Reach | 662,4 in. (1682,5 cm) |
| Max Vertical Wall Digging Depth | 60,0 in. (152,4 cm) |
| Max Dumping Height | 552,0 in. (1402,1 cm) |
| Max Cutting Height | 756,0 in. (1920,2 cm) |
| Gradeability | Not documented for this exact serial range — verify with your dealer |
Service capacities (summary)
| Fuel Capacity | 2905,9 gal (11000,0 l) |
| Hydraulic System Capacity | 2205,9 gal (8350,2 l) |
| Engine Oil | Not documented for this exact serial range — verify with your dealer |
| Cooling System | Not documented for this exact serial range — verify with your dealer |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
Komatsu H65(S/N G26051) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the H65(S/N G26051) beyond the schedule
Predictive Maintenance & Fluid Analysis
For the H65(S/N G26051), fluid health is paramount due to the dual 3516DE-TA engine setup. Implement Komatsu KOWA analysis at every 500-hour interval to monitor wear metals in the hydraulic system and engine oil. Check hydraulic oil particle count and viscosity to protect the 1902.1 GPM (7,199 LPM) main pumps. Monitor coolant SCA levels every 500 hours to prevent cavitation in the large engine blocks. Track fuel dilution and soot levels in the engine oil to maintain the integrity of the turbocharged components. Early detection of water ingress in the hydraulic reservoir prevents premature valve and pump failure.
Corrective & Common Repairs
Address common H65(S/N G26051) failures by inspecting the dual engine air intake systems for clogging, which reduces the 3714 HP output. Check hydraulic hose connections at high-vibration points near the swing machinery for leaks. Monitor the 59.1 in. (150.1 cm) track shoes for uneven wear caused by the 35.4 psi (244.1 kPa) ground pressure. Replace hydraulic return filters promptly to prevent contamination of the relief valves set at 4495 psi (310 Bar). Inspect the swing bearing for play and check the brake system function, as the 1.4 mph (2.3 km) travel speed requires reliable stopping power on inclines.
Overhaul & Rebuild Points
Plan major overhauls for the H65(S/N G26051) based on the 2000-hour comprehensive evaluation. Inspect the final drive gears and bearings for wear, as the 8421 cu. in. (138,000.4 cc) displacement engines deliver immense torque. Check the structural integrity of the boom and stick welds under high stress. Evaluate the condition of the 16 cylinders in the dual engine assembly for compression loss. Rebuild the hydraulic pumps if flow capacity drops below 1902.1 GPM (7,199 LPM). Inspect the undercarriage rollers and idlers for deformation, replacing them before they damage the track chain links.
Seasonal & Environment Servicing
In cold environments, verify the DEF level and system function for the Tier 4 compliant 3516DE-TA engines. Use appropriate viscosity hydraulic oil to ensure proper flow in the 2205.9 gal (8350.2 l) system during startup. In hot climates, clean the radiator and oil cooler fins daily to prevent overheating of the dual engines. Check the air filter restriction indicator frequently in dusty mining conditions to protect the turbochargers. Inspect the cooling system for leaks and ensure the coolant concentration is adequate for the operating temperature. Monitor the track tension to prevent slippage on muddy or icy surfaces.
H65(S/N G26051) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 988 702 | Fuel Filter | Fuel system service | Check fitment → |
| 9M2 342 | Fuel Precleaner Element, Washable | Fuel system service | Check fitment → |
| 988 633 | Main Element - Air Cleaner | Air intake service | Check fitment → |
| 988 634 | Safety Element - Air Cleaner | Air intake service | Check fitment → |
| 988 701 | Oil Filter | Lubrication service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
H65(S/N G26051) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| E10 | Engine controller power failure | Faulty ECM power connections, blown fuses, or ground wire issues | Inspect ECM power connections, fuses, and ground wires |
| CA115 | Engine crankshaft speed sensor failure | Broken sensor, wiring issue, or connector corrosion | Replace the speed sensor and verify voltage at the pin connector |
| CA441 | Battery voltage too low | Weak battery, failing alternator, or loose connections | Replace the alternator or battery; check the voltage regulator |
| CA442 | Battery voltage too high | Failing voltage regulator or alternator malfunction | Replace the alternator or battery; check the voltage regulator |
| AA10NX | Air cleaner clogging | Dirty or blocked air filter element | Replace the air filter |
| B@BCNS | Engine coolant overheating | Low coolant level, blocked radiator fins, or fan belt failure | Check radiator fins, fan belt, and coolant level |
| B@HANS | Hydraulic oil overheating | Contaminated hydraulic oil, clogged filter, or cooler fan issue | Change hydraulic filter and oil; check cooler fan |
| CA122 | Intake air pressure high voltage | Malfunction in the intake pressure sensor or actual overpressure condition | Verify the intake pressure sensor and wiring |
| CA123 | Intake air pressure low voltage | Sensor short or airflow restriction | Check for a sensor short or an airflow restriction |
| CA451 | Common rail pressure sensor feedback value too high | Malfunction in the rail sensor or actual overpressure condition | Diagnose the fuel rail pressure sensor or pump lines |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
H65(S/N G26051) attachments & work tools
Loading Shovel Configurations
The Komatsu H655S is configured as a large mining loading shovel with a dual-engine setup using two Komatsu 3516DE-TA units. This configuration delivers a combined net power of 3714 HP (2770 kW) and gross power of 3730.8 hp (2,781 kW). The machine operates with a hydraulic system capacity of 2205.9 gal (8350.2 l) and a pump flow capacity of 1902.1 GPM (7,199 LPM).
Bucket Capacities
The reference bucket capacity for the H655S is 43.2 cu yds (33.0 m2). Operating weights for the loading shovel configuration are listed at the OEM part reference lbs (the OEM part reference kg) or the OEM part reference.the OEM part reference lbs (685,007 kg). Bucket sizing varies by configuration/series to match specific mining applications such as coal, copper, or oil sands.
Undercarriage and Track Shoes
The machine utilizes a track shoe size of 59.1 in. (150.1 cm) with a track gauge of 248.4 in. (630.9 cm). The overall track length is 3780.0 in. (9601.2 cm) with a length of track on ground of 315.6 in. (801.6 cm). Ground pressure is rated at 35.4 psi (244.1 kPa).
Hydraulic Quick Couplers and Demolition Attachments
Komatsu offers a range of hydraulic breakers with operating weights from 804.7 to 7,189.3 lbs. These attachments utilize large hydraulic components for maximized oil flow and custom-made speed valves to achieve short cycle times. Lehnhoff quick couplers are available for Komatsu hydraulic shovels, designed for higher productivity and versatility in demolition applications.
Cylinder and Component Upgrades
Aftermarket and OEM options include improved clam, bucket, stick, and boom cylinders for Komatsu Hydraulic Shovel models. These components are designed to resolve failure patterns and meet the demands of big cylinders in tough mining environments. Repair services and newly manufactured cylinders are available to extend component life.
Fluid Specifications
Recommended fluids include Komatsu Genuine Lubricants and Coolants formulated to exceed industry standards. Specific fluid types include hydraulic oil, axle oil, powertrain oil, and Super-coolant AF-NAC. Capacities for the hydraulic system, cooling system, and damper case are detailed in the machine's operation and maintenance manual.
All H65(S/N G26051) assemblies by section
Every catalogued assembly group for the Komatsu H65(S/N G26051). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
* = Variations From Page:
Komatsu : H65(S/N G26051) : * = Variations From Page : : Pipe Assy. ? 38 Fig-No : 02
| 00***98 | Half Flange | 2 |
| 13***40 | Plug | 1 |
| 15***40 | Test - Screw Coupling | 1 |
Komatsu : H65(S/N G26051) : * = Variations From Page : : Pipe Assy. ? 38 Fig-No : 03
| 00***98 | Half Flange | 2 |
| 13***40 | Plug | 1 |
| 15***40 | Test - Screw Coupling | 1 |
Komatsu : H65(S/N G26051) : * = Variations From Page : : Pipe Assy. ? 38 Fig-No : 10
| 31***99 | Bolt | 96 |
| 50***98 | Flange | 24 |
| 50***98 | Collar Ring | 24 |
Komatsu : H65(S/N G26051) : * = Variations From Page : : Pipe Assy. ? 38 Fig-No : 12
| 31***99 | Bolt | 96 |
| 50***98 | Flange | 24 |
| 50***98 | Collar Ring | 24 |
Komatsu : H65(S/N G26051) : * = Variations From Page : : Piston Ring Fig-No. 04
Komatsu : H65(S/N G26051) : * = Variations From Page : : Piston Ring Fig-No. 09
Komatsu : H65(S/N G26051) : * = Variations From Page : : Track Adjuster
| 20***40 | Plug | 1 |
| 24***40 | Tappet Rod | 1 |
| 24***40 | Plug | 1 |
Komatsu : H65(S/N G26051) : * = Variations From Page : : Acc. Drawing
Annex
Komatsu : H65(S/N G26051) : Annex : Colour : Yellow
Komatsu : H65(S/N G26051) : Annex : Electric Schematic
Komatsu : H65(S/N G26051) : Annex : Hydraulic Schematic
Komatsu : H65(S/N G26051) : Annex : Tools And Accessories
Backhoe-Equipment
Komatsu : H65(S/N G26051) : Backhoe-Equipment
Komatsu : H65(S/N G26051) : Backhoe-Equipment : Backhoe 3,5 M?
| 26***40 | Catch | 5 |
| 36***40 | Tooth Key | 5 |
| 37***40 | Tooth | 5 |
Komatsu : H65(S/N G26051) : Backhoe-Equipment : Boom 6,5 M
| 00***98 | Clamp | 6 |
| 00***98 | Mounting Clip | 1 |
| 00***98 | Grease Nipple | 5 |
Komatsu : H65(S/N G26051) : Backhoe-Equipment : Boom Cylinder With Adapter, R.H. And L.H.
| 31***99 | Socket Head Cap Screw | 8 |
| 32***99 | Thread Pin | 4 |
| 42***40 | Boom Cylinder Assembly | 1 |
Komatsu : H65(S/N G26051) : Backhoe-Equipment : General View
Komatsu : H65(S/N G26051) : Backhoe-Equipment : Hydraulic Cylinder
| 00***98 | Grease Nipple | 3 |
| 18***40 | Gasket Kit | 1 |
| 18***40 | Stripper Ring | 1 |
Komatsu : H65(S/N G26051) : Backhoe-Equipment : Pipes Bucket Cylinder
| 00***98 | O-Ring | 2 |
| 30***99 | Cover Plate | 4 |
| 31***99 | Bolt | 8 |
Komatsu : H65(S/N G26051) : Backhoe-Equipment : Pipes Stick Cylinder
| 00***98 | O-Ring | 1 |
| 00***98 | O-Ring | 1 |
| 11***40 | Pipe Bracket | 1 |
Komatsu : H65(S/N G26051) : Backhoe-Equipment : Stick 3,0 M
| 00***98 | Mounting Clip | 2 |
| 00***98 | Grease Nipple | 6 |
| 14***40 | Hose Assembly. Nw 6x600 Lg | 1 |
Komatsu : H65(S/N G26051) : Backhoe-Equipment : Wishbone And Rod
| 00***98 | Grease Nipple | 3 |
| 21***40 | Bolt Lock | 4 |
| 26***40 | Stripper | 6 |
Drive
Komatsu : H65(S/N G26051) : Drive : -Air Cleaner
| 22***40 | Air Cleaner, Assembly | 1 |
| 69***38 | Cover, Assembly | 1 |
| 69***39 | Housing, Top | 1 |
Komatsu : H65(S/N G26051) : Drive : -Combined Cooler
| 30***99 | Screw | 28 |
| 32***40 | Combi-Oil-Water Radiator | 1 |
| 33***99 | Nut M8 | 28 |
Komatsu : H65(S/N G26051) : Drive : -Engine
| 0L***65 | Lock Washer | 1 |
| 0S***71 | Bolt | 1 |
| 0S***85 | Bolt | 1 |
Komatsu : H65(S/N G26051) : Drive : -Main Pump
| 00***98 | O-Ring | 1 |
| 17***40 | Screw Plug | 3 |
| 18***40 | O-Ring | 1 |
Komatsu : H65(S/N G26051) : Drive : -Pressure Relief Valve
| 31***99 | Eyebolt | 2 |
| 31***99 | Bolt (Standard) | 4 |
| 32***40 | Pressure Relief Valve | 1 |
Komatsu : H65(S/N G26051) : Drive : -Pump Distributor Gear
| 00***98 | Inner Ring | 1 |
| 00***98 | O-Ring | 1 |
| 08***21 | O-Ring | 1 |
Komatsu : H65(S/N G26051) : Drive : -Return Oil Filter
| 10***65 | O-Ring | 1 |
| 33***99 | Nut | 2 |
| 33***99 | Nut | 1 |
Komatsu : H65(S/N G26051) : Drive : Air Cleaning System, Cat
| 00***98 | Hose Clip | 10 |
| 14***40 | Maintenance Switch | 1 |
| 26***40 | Felt Disk | 1 |
Komatsu : H65(S/N G26051) : Drive : Air Filter And Combined Cooler Arrangement
| 28***40 | Yoke | 2 |
| 30***99 | Screw | 3 |
| 30***99 | Bolt | 4 |
Komatsu : H65(S/N G26051) : Drive : Cold-Starting-System
| 40***40 | Retainer | 1 |
| 69***60 | Replacement Cartridge - Cold-Start-System | 1 |
| 69***61 | Clamp | 1 |
Komatsu : H65(S/N G26051) : Drive : Coupling Assy., Cat, Volvo
| 32***40 | Coupling Assembly. Fig-No: 01-04 | 1 |
| 50***98 | Grub Screw | 1 |
| 69***01 | Plastic Spacer Ring | 1 |
Komatsu : H65(S/N G26051) : Drive : Drive, Cat
Komatsu : H65(S/N G26051) : Drive : Engine : Caterpillar / Type
Komatsu : H65(S/N G26051) : Drive : Exhaust System, Cat
| 24***40 | Flange | 1 |
| 25***40 | Compensator | 1 |
| 27***40 | Tail Piece | 1 |
Komatsu : H65(S/N G26051) : Drive : Fan Supporting
| 03***99 | V-Belt Set | 1 |
| 30***99 | Bolt | 6 |
| 30***99 | Bolt | 6 |
Komatsu : H65(S/N G26051) : Drive : Fuel System, Cat
| 23***40 | Ball Cock | 1 |
| 25***40 | Hose Nw 12x3000 Bulk Ware, State Length Required | 2 |
| 26***40 | Socket | 4 |
Komatsu : H65(S/N G26051) : Drive : Fuel Tank
| 05***40 | Gasket | 1 |
| 08***40 | Oil-Level Glass | 1 |
| 18***40 | Plug, Assembly | 1 |
Komatsu : H65(S/N G26051) : Drive : General View
Komatsu : H65(S/N G26051) : Drive : Lines For Radiator
| 00***98 | Clamp | 3 |
| 00***98 | Clamp | 1 |
| 05***40 | Cable Sleeve | 2 |
Komatsu : H65(S/N G26051) : Drive : Oil Tank And Suction Pipe
| 00***98 | O-Ring | 1 |
| 00***98 | O-Ring | 1 |
| 00***98 | O-Ring | 1 |
Komatsu : H65(S/N G26051) : Drive : Output :
Komatsu : H65(S/N G26051) : Drive : Pumps - Pump Distributor
| 30***99 | Bolt 25 mm Lg | 4 |
| 30***99 | Bolt (Standard) | 12 |
| 31***99 | Washer | 12 |
Komatsu : H65(S/N G26051) : Drive : Serial-No. :
Komatsu : H65(S/N G26051) : Drive : Series :
Komatsu : H65(S/N G26051) : Drive : Speed Control Cable And Adjusting Cylinder
| 00***98 | Sleeve | 2 |
| 15***40 | Clamping Ring | 2 |
| 21***99 | Plastic Pipe ? 10x600 Lg. Bulk Ware, State Length Required | 0 |
Komatsu : H65(S/N G26051) : Drive : Suction Lines
| 00***98 | Clamp | 6 |
| 00***98 | Hose Clamp | 2 |
| 00***98 | O-Ring To Fig-No: 13 | 1 |
Komatsu : H65(S/N G26051) : Drive : Gear Arrangement
Electric
Komatsu : H65(S/N G26051) : Electric : Battery Cables
| 05***40 | Battery Switch | 1 |
| 14***40 | Cable Shoe | 4 |
| 31***99 | Screw | 2 |
Komatsu : H65(S/N G26051) : Electric : Electric System
| 05***40 | Socket | 1 |
| 26***40 | Horn | 1 |
| 30***99 | Bolt | 1 |
Komatsu : H65(S/N G26051) : Electric : General View
Komatsu : H65(S/N G26051) : Electric : Instruments At Control Box
| 05***40 | Tongue Terminal 1,5-2,5 | 1 |
| 27***40 | Connector Socket | 1 |
| 32***99 | Cross Connection | 10 |
Komatsu : H65(S/N G26051) : Electric : Junction Box
| 05***40 | Ground Wire - Series Terminal | 1 |
| 25***40 | Housing, Empty | 1 |
| 25***40 | Assembly Rail Bulk Ware, State Length Required | 1 |
Komatsu : H65(S/N G26051) : Electric : Lighting - Spotlamp
| 05***40 | Plug To Fig-No: 17 | 2 |
| 05***40 | Socket | 2 |
| 25***40 | Housing, Empty | 1 |
Komatsu : H65(S/N G26051) : Electric : Lighting Equipm. - Equipment
| 00***98 | Clamp 15/15 | 12 |
| 05***40 | Wiring Connection | 1 |
| 05***40 | Bulb 35 W | 2 |
Komatsu : H65(S/N G26051) : Electric : Lighting Equipm. - Operator'S Cabin
| 05***40 | Cable Sleeve | 2 |
| 05***40 | Plug To Fig-No: 17 | 1 |
| 05***40 | Socket | 1 |
Komatsu : H65(S/N G26051) : Electric : Switch Box, Cat, Cu
| 05***40 | Socket 2-Polig | 1 |
| 05***40 | Ground Wire - Series Terminal | 2 |
| 25***40 | Housing, Empty | 1 |
Komatsu : H65(S/N G26051) : Electric : Switch Cabinet
| 05***40 | Cable Protection Hose Pg 7 Bulk Ware, State Length Required | 0 |
| 08***40 | Double-Bit Key ? 3.2 | 0 |
| 16***40 | Double-Bit Key ? 5.2 | 0 |
Komatsu : H65(S/N G26051) : Electric : Warning System
| 44***40 | Horn Assembly. Consist. Of Fig-Nos: 01,03-16 | 1 |
| 44***40 | Compressor | 1 |
| 51***40 | Air Hose | 0 |
Komatsu : H65(S/N G26051) : Electric : Wire Layout - Cab
| 00***98 | Clamp 15/15 | 10 |
| 05***15 | Cable Protection Hose Ca. 4000 mm Bulk Ware, State Length Required | 1 |
| 05***40 | Cable Protection Hose Pg 7 Bulk Ware, State Length Required | 1 |
Komatsu : H65(S/N G26051) : Electric : Wire Layout - Engine, Cat
| 05***40 | Cable Lug, Red | 15 |
| 35***40 | Cable Protection Hose Pg 21 Pg 21x1400 Lg. Bulk Ware, State Length Required | 2 |
| 35***40 | Socket Pg 21 | 4 |
Komatsu : H65(S/N G26051) : Electric : Wire Layout - Oil Tank - Control Blocks
| 00***98 | Clamp 15/15 | 10 |
| 00***98 | Clamp 22/15 | 10 |
| 00***98 | Clamp 18/15 | 10 |
Hydraulic
Komatsu : H65(S/N G26051) : Hydraulic
Komatsu : H65(S/N G26051) : Hydraulic : -Control Block
| 00***98 | O-Ring | 16 |
| 31***99 | Screw M8 X 20 | 12 |
| 31***99 | Screw | 16 |
Komatsu : H65(S/N G26051) : Hydraulic : -H.P. Filter, Pilot Oil
| 25***40 | O-Ring, H.P. Element Lubrication + Cooling | 1 |
| 27***40 | High Pressure Filter, Assembly | 1 |
| 96***00 | Socket | 1 |
Komatsu : H65(S/N G26051) : Hydraulic : -H.P. Filter, Pumps I,Ii,Iii
| 31***99 | Screw | 4 |
| 34***99 | Lock Washer | 4 |
| 46***40 | H.P. Filter Assembly | 1 |
Komatsu : H65(S/N G26051) : Hydraulic : -Load Limitation Valve Arr.
| 17***40 | Plug | 3 |
| 33***99 | Nut | 1 |
| 36***40 | Load Limitation Valve Assembly. For H 121 (All Diesel Engines) | 1 |
Komatsu : H65(S/N G26051) : Hydraulic : Anticavitation Valve
| 25***40 | Anticavitation Valve Assembly. Ng 20 | 1 |
| 36***99 | O-Ring | 2 |
| 50***98 | O-Ring | 1 |
Komatsu : H65(S/N G26051) : Hydraulic : Backhoe Control
| 00***98 | Half Flange | 2 |
| 13***40 | Plug | 1 |
| 15***40 | Test - Screw Coupling | 1 |
Komatsu : H65(S/N G26051) : Hydraulic : Bleed-Off Valve
| 00***98 | O-Ring | 4 |
| 00***98 | O-Ring | 2 |
| 31***99 | Screw | 2 |
Komatsu : H65(S/N G26051) : Hydraulic : Control Blocks - H.P. Filter- Pumps
| 00***98 | O-Ring | 9 |
| 14***40 | Half Flange | 6 |
| 31***99 | Screw | 24 |
Komatsu : H65(S/N G26051) : Hydraulic : Control Blocks - Manifold
| 31***99 | Bolt | 96 |
| 50***98 | Flange | 24 |
| 50***98 | Collar Ring | 24 |
Komatsu : H65(S/N G26051) : Hydraulic : Control Blocks - Rotary Joint
| 00***98 | Half Flange | 8 |
| 00***98 | O-Ring | 8 |
| 00***98 | Plug-In Sleeve | 2 |
Komatsu : H65(S/N G26051) : Hydraulic : Control Blocks - Swing Gear
| 00***98 | Half Flange | 4 |
| 00***98 | O-Ring | 4 |
| 00***98 | O-Ring | 2 |
Komatsu : H65(S/N G26051) : Hydraulic : Control Blocks, H.P. Filter Arr.
| 00***98 | Half Flange | 3 |
| 15***40 | Test - Screw Coupling | 3 |
| 30***99 | Bolt | 2 |
Komatsu : H65(S/N G26051) : Hydraulic : Control Lines
| 00***98 | Union | 2 |
| 00***98 | Union | 3 |
| 00***40 | Sleeve | 0 |
Komatsu : H65(S/N G26051) : Hydraulic : Control Lines - Load Limitation Valve - Pumps
| 00***40 | Sleeve | 0 |
| 15***40 | Clamping Ring | 0 |
| 25***40 | Hose Dn 8 X Ca. 2000 Lg. Bulk Ware, State Length Required | 0 |
Komatsu : H65(S/N G26051) : Hydraulic : Control Lines, Pilot Oil Unit
| 00***98 | Union | 2 |
| 00***98 | Union | 3 |
| 00***98 | Union | 1 |
Komatsu : H65(S/N G26051) : Hydraulic : Control Lines, Pilot Oil Unit, L.H.
| 13***40 | Plug-In Sleeve | 0 |
| 15***40 | Clamping Ring | 0 |
| 21***99 | Plastic Pipe ? 12 Bulk Ware, State Length Required | 0 |
Komatsu : H65(S/N G26051) : Hydraulic : Control Lines, Pilot Oil Unit, R.H.
| 13***40 | Plug-In Sleeve | 0 |
| 15***40 | Clamping Ring | 0 |
| 21***99 | Plastic Pipe ? 12 Bulk Ware, State Length Required | 0 |
Komatsu : H65(S/N G26051) : Hydraulic : Control Lines-Control Blocks -Load Limitation Valve-Pumps
| 00***98 | Test Socket | 1 |
| 00***40 | Sleeve | 0 |
| 00***98 | Sleeve | 0 |
Komatsu : H65(S/N G26051) : Hydraulic : General View
Komatsu : H65(S/N G26051) : Hydraulic : Hydr. Control
| 00***40 | Sleeve | 0 |
| 15***40 | Clamping Ring | 0 |
| 18***40 | Connection Plate | 1 |
Komatsu : H65(S/N G26051) : Hydraulic : Hydr.-Control, Brake
| 00***98 | Test Socket | 1 |
| 00***98 | Sleeve | 0 |
| 15***40 | Clamping Ring | 0 |
Komatsu : H65(S/N G26051) : Hydraulic : Lines - Control Blocks - Oil Tank
| 00***98 | Half Flange | 16 |
| 00***98 | O-Ring | 8 |
| 18***40 | Hose Fittings | 4 |
Komatsu : H65(S/N G26051) : Hydraulic : Lines - Control Oil Filter
| 00***98 | Union | 3 |
| 00***98 | Sleeve | 4 |
| 15***40 | Clamping Ring | 4 |
Komatsu : H65(S/N G26051) : Hydraulic : Lines, Hydr. Oil Cooler
| 00***98 | Half Flange | 2 |
| 00***98 | O-Ring | 1 |
| 00***98 | Union | 1 |
Komatsu : H65(S/N G26051) : Hydraulic : Lines :
Komatsu : H65(S/N G26051) : Hydraulic : Lube Lines Pump Bearing
| 00***98 | Socket | 3 |
| 00***98 | Union | 1 |
| 15***40 | Union | 1 |
Komatsu : H65(S/N G26051) : Hydraulic : Manifold
| 15***40 | Test - Screw Coupling | 1 |
| 17***40 | Union | 3 |
| 18***40 | Screw Plug | 1 |
Komatsu : H65(S/N G26051) : Hydraulic : Manifold - Basic Boom
| 00***98 | Half Flange | 6 |
| 00***98 | Half Flanged | 2 |
| 00***98 | O-Ring | 6 |
Komatsu : H65(S/N G26051) : Hydraulic : Pressure Relief Valve
| 10***65 | O-Ring | 1 |
| 32***40 | Pressure Relief Valve, Assembly. Without Pressure Adjustment | 1 |
| 50***98 | O-Ring | 1 |
Komatsu : H65(S/N G26051) : Hydraulic : Pressure Sequence Stage
| 10***65 | O-Ring | 1 |
| 22***40 | Pressure Connecting Stage Assembly | 1 |
| 67***30 | O-Ring | 1 |
Komatsu : H65(S/N G26051) : Hydraulic : Return Lines - Pumps - Oil Tank
| 26***40 | Hose Nw 10 Bulk Ware, State Length Required | 0 |
| 37***99 | Union | 2 |
| 37***99 | Pipe Connection | 3 |
Mounting Parts
Komatsu : H65(S/N G26051) : Mounting Parts : Platform With Counterweight
| 16***40 | Profiled Joint Ca. 6000 Lg. Bulk Ware, State Length Required | 0 |
| 28***40 | Bush | 4 |
| 30***99 | Bolt | 7 |
Operator'S Cab
Komatsu : H65(S/N G26051) : Operator'S Cab
Komatsu : H65(S/N G26051) : Operator'S Cab : Boom, Stick
| 34***99 | Pin | 2 |
| 41***40 | Pilot Oil Unit Assembly | 1 |
| 50***98 | O-Ring | 1 |
Komatsu : H65(S/N G26051) : Operator'S Cab : Brake
| 34***40 | Pilot Oil Unit Assembly | 1 |
| 69***22 | Return Spring | 1 |
| 75***73 | Base Assembly. Consist. Of Fig-Nos: 04-12 | 1 |
Komatsu : H65(S/N G26051) : Operator'S Cab : Colour : White
Komatsu : H65(S/N G26051) : Operator'S Cab : Compound Glazing With Trap Window
| 08***40 | Clamping Section 2800 Lg. (To Fig-Nos. 02,04) Bulk Ware, State Length Required | 7 |
| 08***40 | Filler Section 3000 Lg. Bulk Ware, State Length Required | 7 |
| 16***40 | Profiled Joint Ca. 6000 Lg. Bulk Ware, State Length Required | 1 |
Komatsu : H65(S/N G26051) : Operator'S Cab : Compressor Mounts
| 15***40 | Cold Protective | 1 |
| 25***40 | Solenoid Clutch | 1 |
| 30***99 | Bolt | 4 |
Komatsu : H65(S/N G26051) : Operator'S Cab : Control Boxes And Cover, Foot Rest
| 25***40 | Breather Up To 06 122 | 1 |
| 29***40 | Moulding Material 10x90x120 | 1 |
| 30***99 | Bolt | 25 |
Komatsu : H65(S/N G26051) : Operator'S Cab : Covering
| 08***40 | Rubber Hood Retainer | 1 |
| 15***40 | Tape Roller | 6 |
| 16***40 | Profiled Joint Ca. 6000 Lg. Bulk Ware, State Length Required | 3 |
Komatsu : H65(S/N G26051) : Operator'S Cab : General View
Komatsu : H65(S/N G26051) : Operator'S Cab : Ladder And Gratings
| 30***99 | Screw | 2 |
| 30***99 | Screw | 8 |
| 31***99 | Washer | 2 |
Komatsu : H65(S/N G26051) : Operator'S Cab : Lining
| 31***40 | Rubber | 1 |
| 42***40 | Rubber | 1 |
| 42***40 | Insulation | 1 |
Komatsu : H65(S/N G26051) : Operator'S Cab : Mounting Parts, Driver'S Cab
| 30***40 | Ladder | 1 |
| 30***99 | Screw | 22 |
| 30***99 | Screw | 8 |
Komatsu : H65(S/N G26051) : Operator'S Cab : Oil Heater
| 26***40 | Water Heater | 1 |
| 69***73 | Heat Exchanger | 1 |
| 96***07 | Double-Radial Blower | 1 |
Komatsu : H65(S/N G26051) : Operator'S Cab : Oil Heating, Cat
| 05***40 | Cable Sleeve | 1 |
| 08***40 | Seal 340 Lg. Bulk Ware, State Length Required | 4 |
| 26***40 | Air Cleaner Mounting | 1 |
Komatsu : H65(S/N G26051) : Operator'S Cab : Operator'S Cab
| 00***98 | Es-Pin | 1 |
| 08***40 | Dressing Hook | 1 |
| 26***40 | Ash Tray | 1 |
Komatsu : H65(S/N G26051) : Operator'S Cab : Operator'S Seat
| 44***40 | Operator'S Seat | 1 |
| 69***78 | Micro Switch | 1 |
| 69***73 | Cushion Assembly | 1 |
Komatsu : H65(S/N G26051) : Operator'S Cab : Operator'S Stand Pilot Oil Unit Bullclam Bucket
| 30***99 | Screw | 14 |
| 30***99 | Bolt | 1 |
| 30***99 | Bolt | 8 |
Komatsu : H65(S/N G26051) : Operator'S Cab : Pilot Oil Unit, Pedals Drive
| 41***40 | Pilot Oil Unit Assembly | 1 |
| 69***22 | Return Spring | 2 |
| 75***73 | Compression Spring | 2 |
Komatsu : H65(S/N G26051) : Operator'S Cab : Protection Roof
| 31***99 | Washer | 4 |
| 43***40 | Protection Roof | 1 |
| 43***40 | Protection Roof Assembly | 1 |
Komatsu : H65(S/N G26051) : Operator'S Cab : Wipe- And Wash System
| 19***40 | Diaphragm Pump | 1 |
| 19***40 | Water Reservoir | 1 |
| 19***40 | Hose ? 6 4,0m (3,5m+0,5m Lang) Bulk Ware, State Length Required | 2 |
Superstructure
Komatsu : H65(S/N G26051) : Superstructure : General View
Komatsu : H65(S/N G26051) : Superstructure : General View Superstructure
Komatsu : H65(S/N G26051) : Superstructure : Machine-Maintenance Parts
| 00***98 | O-Ring | 1 |
| 00***98 | O-Ring | 1 |
| 00***98 | O-Ring | 1 |
Komatsu : H65(S/N G26051) : Superstructure : Painting/Decals/Stop Pads
| 11***40 | Step Pad | 10 |
| 12***40 | Plate, Spain | 2 |
| 12***40 | Plate, French | 2 |
Swing Gear
Komatsu : H65(S/N G26051) : Swing Gear : Brake
| 30***99 | Bolt | 16 |
| 31***99 | Plug | 1 |
| 31***99 | Bolt | 12 |
Komatsu : H65(S/N G26051) : Swing Gear : Hydr. Motor
| 18***40 | Shaft Seal No Field Repair Item | 1 |
| 31***99 | Screw | 2 |
| 31***99 | Bolt | 4 |
Komatsu : H65(S/N G26051) : Swing Gear : Swing Gear
| 28***40 | Pinion Cover | 1 |
| 30***99 | Screw | 4 |
| 30***99 | Screw | 3 |
Komatsu : H65(S/N G26051) : Swing Gear : Swing Gear Box
| 30***99 | Bolt 100 Lg | 2 |
| 31***99 | Plug | 2 |
| 32***40 | Slew Gear Box Assembly | 1 |
Swing Ring
Komatsu : H65(S/N G26051) : Swing Ring : Lube System
| 00***98 | Union | 24 |
| 15***40 | Clamping Ring | 48 |
| 21***99 | Pipe ? 6x150 mm Bulk Ware, State Length Required | 0 |
Komatsu : H65(S/N G26051) : Swing Ring : Mounting
| 30***99 | Bolt 35 Lg | 2 |
| 34***99 | Lock Washer | 2 |
| 42***40 | Bush | 60 |
Komatsu : H65(S/N G26051) : Swing Ring : Swing Ring
| 22***40 | Lip Type Seal Ng 25 X 9.200 mm Bulk Ware, State Length Required | 1 |
| 24***40 | Lip Type Seal Ng 20 X 9.200 mm Bulk Ware, State Length Required | 1 |
| 31***99 | Bolt (Standard) | 6 |
Undercarriage
Komatsu : H65(S/N G26051) : Undercarriage
Komatsu : H65(S/N G26051) : Undercarriage : -Grease Tensionsing Cylinder
| 18***40 | Stripper | 1 |
| 18***40 | V-Seal | 1 |
| 18***40 | Grease Nipple | 1 |
Komatsu : H65(S/N G26051) : Undercarriage : -Hydr. Motor
| 31***99 | Screw | 6 |
| 32***40 | Hydraulic. Motor, Assembly | 1 |
| 34***99 | Snap Ring | 1 |
Komatsu : H65(S/N G26051) : Undercarriage : -Idler
| 31***99 | Screw Plug | 2 |
| 31***99 | Screw (Standard) | 4 |
| 34***99 | Lock Washer | 4 |
Komatsu : H65(S/N G26051) : Undercarriage : -Rotary Joint
| 17***40 | Plug | 4 |
| 20***40 | Screw Plug | 2 |
| 26***40 | Stripper | 1 |
Komatsu : H65(S/N G26051) : Undercarriage : -Top Roller
| 34***99 | Pin | 2 |
| 41***40 | Support Roller, Assembly | 1 |
| 69***73 | Snap Ring | 1 |
Komatsu : H65(S/N G26051) : Undercarriage : -Track Adjuster (Nitrogen)
| 20***40 | Plug | 1 |
| 24***40 | Tappet Rod | 1 |
| 24***40 | Plug | 1 |
Komatsu : H65(S/N G26051) : Undercarriage : -Track Group
| 32***40 | Chain 51 Links 51 Glieder (H 65) | 1 |
| 44***40 | Chain 49 Links 49 Glieder (H 55 N) | 1 |
| 49***40 | Pin (Smaller Diameter For Job Site Repair) | 0 |
Komatsu : H65(S/N G26051) : Undercarriage : -Track Roller
| 34***99 | Dowel Sleeve | 2 |
| 41***40 | Track Roller Assembly | 1 |
| 69***73 | Track Roller Body | 1 |
Komatsu : H65(S/N G26051) : Undercarriage : -Traction Transmission
| 18***40 | O-Ring | 1 |
| 25***40 | Lifetime Seal | 1 |
| 30***99 | Screw | 12 |
Komatsu : H65(S/N G26051) : Undercarriage : Drive Protection
| 25***40 | Hv-Washer | 12 |
| 30***99 | Bolt 35 Lg | 22 |
| 31***99 | Washer | 22 |
Komatsu : H65(S/N G26051) : Undercarriage : General View
Komatsu : H65(S/N G26051) : Undercarriage : Hydr. Lines
| 00***98 | Half Flanged | 16 |
| 00***98 | O-Ring | 4 |
| 18***40 | Screw Plug | 1 |
Komatsu : H65(S/N G26051) : Undercarriage : Plates 800 Wide
Komatsu : H65(S/N G26051) : Undercarriage : Undercarriage
| 25***40 | Hv-Washer | 40 |
| 28***40 | Clamping Ring | 1 |
| 29***40 | Track Guide | 4 |
Frequently asked questions
What engine does the Komatsu H65(S/N G26051) use?
The Komatsu H65(S/N G26051) is powered by two Komatsu 3516DE-TA diesel engines, providing a combined net power of 3714 HP (2770 kW).
What is the operating weight of the Komatsu H65(S/N G26051)?
The operating weight of the Komatsu H65(S/N G26051) is approximately 1,510,167 lbs (685,000 kg).
What model replaced the Komatsu H65?
The provided sources do not specify the exact successor model to the Komatsu H65.
What H65(S/N G26051) owners discuss
What are the typical powertrain and hydraulic behaviors observed in Komatsu hydraulic shovels regarding performance degradation?
Komatsu hydraulic shovels often exhibit a pattern where hydraulic components and the engine wear out simultaneously. A failure in the main hydraulic pump frequently indicates that the engine is nearing the end of its service life. This synchronized wear contributes to lower resale values for the machine line. Owners report that slow movements or reduced power often begin as minor symptoms before escalating into major repairs.
What undercarriage and wear patterns are typical for this machine type?
Undercarriage components are subject to significant wear and tear, particularly in harsh environments. Track pads, bushings, and bearings degrade due to friction and environmental factors like dust and moisture. Track tension must be monitored regularly to prevent loosening. The line is designed such that undercarriage wear can accelerate overall machine degradation if not addressed proactively.
What engine quirks or common issues are associated with Komatsu excavator engines?
Engine performance issues are a primary concern, including loss of power under load, increased fuel consumption, and overheating. Common causes include airflow restriction from dirty filters, injector wear, and failing fuel delivery components. Contamination from low-quality fuel or extended service intervals accelerates engine wear. Owners also report issues with starting difficulties and black smoke from the exhaust, often linked to fuel system faults or turbocharger carbon deposition.
What are the common electrical and sensor issues reported by operators?
Komatsu machines rely heavily on electronic control systems, making them susceptible to intermittent starting, dashboard failures, and random shutdowns. A single faulty sensor or unstable power supply can trigger multiple warning signals. Operators report electromechanical issues such as electrical circuit faults, sensor malfunctions, and control panel problems that affect machine functionality and control.
What should be checked when buying a used Komatsu H65 hydraulic shovel?
When evaluating a used Komatsu H65, inspect the hydraulic system for leaks and check fluid levels. Verify the engine oil level and inspect the cooling system for blockages. Test the battery with a multimeter to ensure it holds charge. Examine the undercarriage for excessive wear on tracks and rollers. Check for any signs of corrosion on metal components. Verify the functionality of all sensors and the control panel. Consult the machine's service manual for specific diagnostic steps.
What hydraulic fluid specifications are recommended for Komatsu excavators?
Komatsu recommends using Komatsu Genuine Lubricants and Coolants, which are formulated to meet high engineering standards. Specific hydraulic oil types vary by ambient temperature and operating conditions. In hot climates, oils with higher viscosity indices may be required. Always consult the operation and maintenance manual for the exact fluid specification and replacement intervals for the specific serial range.
What is the critical safety fix regarding the main safety valve?
The main safety valve is critical for the smooth operation of the entire hydraulic system. If the valve fails, it can lead to excessive oil temperature and reduced system performance. Regular inspection and maintenance of the main safety valve are required to ensure safe operation. Have your dealer verify the valve's condition and function during service intervals.
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 H65(S/N G26051). Related factory variants of the same model family:
H65(S/N G26014)H65(S/N G26058)
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