Komatsuhydraulic shovels(no series)

Komatsu H135S-1(S/N G61033)

Maintenance schedule, common problems & OEM parts breakdown

The Komatsu H135S-1 is a heavy hydraulic shovel designed for large-scale mining and major earthmoving applications. Production years for this series span the late 1990s through the early 2000s, serving as the successor to the H135S and the predecessor to the H135S-2. The machine class is defined by its massive operating weight, which varies by configuration and series between 308,647 lb (140,000 kg) and 308,647 lb (140,000 kg). Configurations offered include varying boom and stick lengths, such as a 26 ft 315 in (8000 mm) boom with an 11 ft 142 in (3600 mm) stick, and a 39 ft 472 in (12000 mm) boom with an 11 ft 142 in (3600 mm) stick. The H135S-1 is engineered for high-durability service in extreme conditions, featuring a robust undercarriage and chassis built to withstand the stresses of continuous heavy digging.

Across the H135S series generations, Komatsu refined hydraulic system efficiency and undercarriage durability to extend service life in abrasive mining environments. The H135S-1 matters in the used and parts market today because its specific serial range, including S/N G61033, represents a mature platform where genuine replacement parts remain critical for maintaining operational integrity. As these machines age, the availability of accurate maintenance data and specific component replacements for the powertrain, hydraulic pumps, and slew gears becomes essential. The H135S-1's design allows for extensive rebuild capabilities, making it a viable asset for fleets seeking to extend equipment life through comprehensive overhaul rather than immediate replacement.

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 H135S-1(S/N G61033) specifications

Engine

ModelVTA28-C-800
Number of Cylinders12
Displacement1708.7 cu in (28.0 L)
Gross Power728.2 hp (543 kW)
Net Power728 hp (543 kW)
Power Measured @1800 rpm
AspirationTurbocharged

Weights

Operating Weightthe OEM part reference.2 lb (0.9 kg)
Ground Pressure29.3 psi (202 kPa)

Dimensions

Width Over Tracks16.77 ft (5.11 m)
Length of Track on Ground16.02 ft (4.88 m)
Track Gauge13.95 ft (4.25 m)
Ground Clearance2.55 ft (0.78 m)
Height to Top of Cab20.45 ft (6.23 m)
Tail Swing Radius16.21 ft (4.94 m)
Shoe Size23.63 in (600 mm)

Performance

Max Travel Speed1.5 mph (2.4 km/h)
Swing Speed6.2 rpm
Hydraulic Pump Flow Capacity435.9 gal/min (1650 L/min)
Hydraulic System Relief Valve Pressure4495 psi (31 MPa)

Service capacities (summary)

Fuel Capacity475.6 gal (1800 L)
Hydraulic System Fluid Capacity425.4 gal (1610 L)

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

Komatsu H135S-1(S/N G61033) maintenance schedule

Service intervalTasks
Every 10 h
  • Check engine oil level and condition
  • Check hydraulic fluid level at sight glass
  • Check coolant level and ensure cap is secure
  • Drain water from fuel separator
  • Check DEF level
  • Check air filter restriction indicator
Every 250 h
  • Change engine oil and filter
  • Grease all points on boom, stick, bucket, and swing bearing
  • Check hydraulic oil level
  • Inspect air cleaner element
  • Inspect belts, hoses, and clamps
  • Visual walk-around inspection
Every 500 h
  • Replace fuel filter
  • Replace hydraulic return filter
  • Perform battery load test
  • Test coolant SCA concentration
  • Collect KOWA hydraulic oil sample
  • Measure undercarriage wear
Every 1,000 h
  • Change hydraulic oil
  • Change final drive oil on both sides
  • Inspect turbocharger
  • Check valve adjustment
  • Inspect structural welds on boom and stick
  • Replace air filter outer element
Every 2,000 h
  • Flush and replace coolant
  • Change swing machinery oil
  • Replace worn belts and hoses
  • Comprehensive structural inspection
  • Inspect and replace worn undercarriage components
  • Perform comprehensive component evaluation

Servicing the H135S-1(S/N G61033) beyond the schedule

Predictive Maintenance & Fluid Analysis

Utilize KOWA fluid 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 detect pump or valve wear early. Inspect coolant pH and SCA concentration to prevent scaling in the engine block. Monitor DEF levels daily to ensure Tier 4 compliance and prevent engine derating. Track KOMTRAX telematics data for load frequency and fault codes to anticipate component failures before they cause downtime.

Corrective & Common Repairs

Address hydraulic hose leaks and cracks during daily inspections to prevent fluid loss and fire hazards. Replace worn track shoes and idlers when undercarriage wear measurements exceed limits to maintain proper track tension. Inspect the slew-brake valve for pilot oil leaks that cause swing drift. Check the turbocharger for shaft play or oil leaks. Replace the hydraulic return filter if pressure differential indicators show clogging. Repair cracked boom or stick welds during the 1000-hour structural inspection.

Overhaul & Rebuild Points

Plan major overhauls for the hydraulic pump and swing machinery at the 2000-hour milestone. Replace final drive oil and inspect gears for pitting or wear. Rebuild the engine with new piston rings and valve seals if compression drops or oil consumption increases. Inspect the undercarriage for excessive wear on sprockets, rollers, and track chains. Replace all hydraulic hoses and seals during the comprehensive component evaluation. Check the swing circle for backlash or wear that affects stability.

Seasonal & Environment Servicing

Install the hot-water-heater in cold climates to ensure engine startability and reduce wear. Check the air filter restriction indicator frequently in dusty mining environments to prevent engine damage. Drain water from the fuel separator more often in humid conditions to prevent fuel line freezing. Inspect the radiator and oil cooler fins for debris buildup to maintain cooling efficiency. Use Komatsu Genuine Lubricants formulated for the operating temperature range. Verify ROPS/FOPS integrity and tighten all bolts after heavy vibration exposure.

H135S-1(S/N G61033) common service parts

Part numberPart
4N5 823Fuel Filter CartridgeCheck fitment →
2P4 005Oil Filter CartridgeCheck fitment →
414 024 40Return Oil Filter (H65, H135) (H65, H135) A = 375Check fitment →
691 865Filter Insert (Paper) - Return Oil Filter - LeakageCheck fitment →
358 601 40Return Oil Filter, AssemblyCheck fitment →

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

H135S-1(S/N G61033) fault codes & troubleshooting

CodeMeaningLikely causeWhat to do
CA115Engine crankshaft speed sensor failureBroken sensor, wiring issue, or connector corrosionReplace the speed sensor and verify the voltage at the pin connector
CA441Battery voltage too lowWeak battery or charging system failureReplace the battery or alternator and check the voltage regulator
CA442Battery voltage too highFaulty voltage regulator or alternatorReplace the alternator or battery and check the voltage regulator
CA122Intake air pressure sensor high voltageSensor malfunction or wiring shortVerify the intake pressure sensor and wiring
CA123Intake air pressure sensor low voltageSensor short or airflow restrictionCheck for a sensor short or an airflow restriction
CA153Intake air temperature sensor high voltageSensor malfunctionReplace or test the IAT sensor
CA154Intake air temperature sensor low voltageSensor malfunctionReplace or test the IAT sensor
CA234Engine overspeedThrottle calibration error, engine load cycle issue, or operator misuseVerify throttle calibration, engine load cycle, or operator misuse
CA451Common rail pressure sensor feedback value too highFuel rail sensor malfunction or actual overpressure conditionDiagnose the fuel rail pressure sensor or pump lines
CA452Common rail pressure sensor feedback value too lowFuel rail sensor malfunction or low pressure conditionDiagnose 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.

H135S-1(S/N G61033) attachments & work tools

Standard Digging Bucket

Typical capacity for this class ranges from 10 to 14 cubic yards (7.6 to 10.7 cubic meters). Factory configurations often pair the machine with a 39'472 " (12000 mm) boom and varying stick lengths to optimize reach and depth.

Heavy Duty / Rock Bucket

Designed for high-abrasion applications with reinforced side cutters and bottom plates. Capacity varies by configuration/series but generally aligns with the standard bucket range, prioritizing durability over volume.

Long Reach / High Dump Configurations

Available with boom/stick options including a 39'472 " (12000 mm) boom paired with sticks of 11'142 " (3600 mm), 16'197 " (5000 mm), or 23'276 " (7000 mm). These setups increase max digging depth to 47.91 ft (14.6 m) and max reach to 68.25 ft (20.8 m).

Coupler / Quick Attach System

The H135S-1 utilizes a fixed-pin or hydraulic quick-coupler mounting interface compatible with standard excavator bucket pins. Specific coupler models vary by dealer and aftermarket supplier; verify pin diameter and cylinder spacing with your local Komatsu dealer.

Hydraulic Circuit Requirements

Tools requiring auxiliary hydraulics (e.g., breakers, grapples) must utilize the machine's main relief valve pressure of 4495 psi (31 MPa). The hydraulic pump flow capacity of 435.9 gal/min (1650 L/min) supports high-flow tool operations.

Engine & Powertrain Compatibility

The H135S-1(S/N G61033) is powered by a Komatsu VTA28-C-800 diesel engine with 12 cylinders and 728.2 hp (543 kW) gross power. Work tools must be matched to this power output to avoid underperformance or excessive fuel consumption.

Guarding & Protection Options

Factory options include side cutters, bottom plates, and wear strips for buckets. The machine's 29.3 psi (202 kPa) ground pressure and 16.77 ft (5.1 m) track width provide stability for heavy tool attachments.

All H135S-1(S/N G61033) assemblies by section

Every catalogued assembly group for the Komatsu H135S-1(S/N G61033). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

* = Variations From Page:
Komatsu : H135s-1(S/N G61033) : * = Variations From Page : : 24v/91f 24b 111 7817
Komatsu : H135s-1(S/N G61033) : * = Variations From Page : : Generator 100a/30s1
2P***05Oil Filter Cartridge2
2W***87Pressure Gauge, Fuel1
3T***67Starter1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : * = Variations From Page : : Grease
00***98Locking Spring1
26***40Pressure Gauge1
30***99Bolt4
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : * = Variations From Page : : Operator'S Cab Item 01
05***40Grommet2
05***40Socket2
05***40Bulb 10 W4
See all parts with full part numbers in Heavy Parts AI →
Annex
Komatsu : H135s-1(S/N G61033) : Annex : Colour : Chrome Yellow
Komatsu : H135s-1(S/N G61033) : Annex : Electric Schematic
Komatsu : H135s-1(S/N G61033) : Annex : Hydraulic Schematic
Komatsu : H135s-1(S/N G61033) : Annex : Tools And Accessories
Backhoe Equipment
Komatsu : H135s-1(S/N G61033) : Backhoe Equipment
Komatsu : H135s-1(S/N G61033) : Backhoe Equipment : Backhoe 7,5 M?
41***40Tooth Adapter3
41***40Corner Adapter1
41***40Corner Adapter1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Backhoe Equipment : Backhoe 8,5 M?
41***40Tooth Adapter3
41***40Corner Adapter1
41***40Corner Adapter1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Backhoe Equipment : Boom 8,0 M
00***98Mounting Clip4
00***98Mounting Clip2
00***98Grease Nipple8
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Backhoe Equipment : Boom Cylinder With Adapters R.H. And L.H.
00***98O-Ring1
31***99Socket Head Cap Screw8
36***99O-Ring1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Backhoe Equipment : Hydr. Cylinder
00***98Grease Nipple3
00***98O-Ring1
20***40Sealing Element1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Backhoe Equipment : Pipes Bucket Cylinder
00***98O-Ring1
26***40Connecting Block1
30***99Bolt4
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Backhoe Equipment : Pipes Stick Cylinder
00***98O-Ring1
00***98O-Ring2
11***40Pipe Bracket1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Backhoe Equipment : Stick 3,6 M
00***98Mounting Clip3
00***98Mounting Clip3
00***98Clamp1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Backhoe Equipment : Wishbone And Rod
00***98Grease Nipple5
21***40Bolt Lock2
26***40Stripper6
See all parts with full part numbers in Heavy Parts AI →
Drive
Komatsu : H135s-1(S/N G61033) : Drive
Komatsu : H135s-1(S/N G61033) : Drive : -Air Cleaner
30***99Bolt20
30***99Lock Washer22
33***99Nut22
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Drive : -Coupling
30***99Screw2
34***99Dowel Sleeve32
50***98Bolt32
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Drive : -Engine
2P***05Oil Filter Cartridge2
2W***87Pressure Gauge, Fuel1
3T***67Starter1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Drive : -Fan Pump
Komatsu : H135s-1(S/N G61033) : Drive : -Main Pump
00***98O-Ring1
00***98O-Ring2
17***40Plug2
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Drive : -Pump Distributor Gear
00***98O-Ring1
00***98O-Ring4
08***54O-Ring2
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Drive : -Radiator
00***98Clamp2
30***99Screw20
31***99Plug6
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Drive : Air Cleaning System, Cat
00***99Bolt6
00***98Hose Clip6
14***40Maintenance Switch2
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Drive : Drive, Cat
00***98Hose Clamp2
00***98Bolt16
14***40Dust Cap1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Drive : Engine : Caterpillar
Komatsu : H135s-1(S/N G61033) : Drive : Exhaust System, Cat
21***40Muffler1
23***40Half Clamp2
23***40Half Clamp2
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Drive : Fan Mounting - Radiator
00***98Union2
30***40Disc2
30***99Bolt 25 mm Lg4
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Drive : Fuel Lines, Cat
23***40Ball Cock1
25***40Hose Dn 12 X Ca. 4000 Lg. Bulk Ware, State Length Required1
25***40Hose Fittings1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Drive : Lines For Radiator, Cat
00***98Clamp4
00***98Clamp4
00***98Clamp4
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Drive : Output :
Komatsu : H135s-1(S/N G61033) : Drive : Pump And Distributor Gear Arrangement
00***98Union1
26***40Hose Fittings2
30***99Bolt12
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Drive : Radiator Arr.
00***98Union2
08***80Hinge Pin4
12***40Base1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Drive : Serial-No. :
Komatsu : H135s-1(S/N G61033) : Drive : Series :
Komatsu : H135s-1(S/N G61033) : Drive : Speed Control
00***98Union1
18***40Connection Plate1
21***99Pipe ? 12 Ca 300mm Bulk Ware, State Length Required0
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Drive : Suction Lines
00***98O-Ring1
26***40Hose Fittings6
30***99Bolt 35 Lg12
See all parts with full part numbers in Heavy Parts AI →
Electric
Komatsu : H135s-1(S/N G61033) : Electric : Batteries With Cables
00***98Pipe Clamp, Rubber Armed8
14***40Cable Shoe8
30***99Screw4
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Electric : Cables - Cab Support
05***15Cable Protection Hose Ca. 4000 mm Bulk Ware, State Length Required6
32***40Cable Union Pg 213
35***40Cable Protection Hose Pg 16 Bulk Ware, State Length Required0
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Electric : Cables - Oil Tank And Control Frame
00***98Clamp 22/1510
05***40Cable Lug, Red15
05***15Cable Protection Hose Ca. 4000 mm Bulk Ware, State Length Required17
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Electric : Cables Superstructure
00***98Clamp 15/155
00***98Clamp 18/1520
05***40Cable Lug, Red15
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Electric : Electric Equipment
Komatsu : H135s-1(S/N G61033) : Electric : Horn, Illumination
25***40Compressor-Single Ton-Horn Consist. Of Fig.-No: 03-051
27***40Compressor-Two Ton-Horn Consist. Of Fig.-No: 05-081
30***99Bolt 20 mm Lg4
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Electric : Junction Box On Oil Tank
05***40Pull Switch1
25***40Housing, Empty1
32***99Screw6
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Electric : Main Switch Box In Cabin Support
05***40Pull Switch1
05***40Flanged Socket1
05***40Ground Wire - Series Terminal20
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Electric : Operation Panel
14***40Disc8
27***40Connector Socket1
30***40Cover1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Electric : Standard Lighting Equipment
00***98Clamp 15/1530
05***40Plug To Fig-No: 175
05***40Socket3
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Electric : Switch Box - Engine
05***40Cable Union1
05***40Ground Wire - Series Terminal8
26***40Retainer2
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Electric : Wire Layout - Engine, Cat
05***40Cable Lug, Red15
35***40Cable Protection Hose Pg 9x***00 Lg. Bulk Ware, State Length Required0
35***40Cable Protection Hose Pg 21 Pg 21x1400 Lg. Bulk Ware, State Length Required2
See all parts with full part numbers in Heavy Parts AI →
General View
Komatsu : H135s-1(S/N G61033) : General View : General View Backhoe Equipment
Komatsu : H135s-1(S/N G61033) : General View : General View Drive
Komatsu : H135s-1(S/N G61033) : General View : General View Electric
Komatsu : H135s-1(S/N G61033) : General View : General View Hydraulic
Komatsu : H135s-1(S/N G61033) : General View : General View Lubrication- And Refueling Equipment
Komatsu : H135s-1(S/N G61033) : General View : General View Operator'S Cab
Komatsu : H135s-1(S/N G61033) : General View : General View Shovel
Komatsu : H135s-1(S/N G61033) : General View : General View Superstructure
Komatsu : H135s-1(S/N G61033) : General View : General View Undercarriage
Komatsu : H135s-1(S/N G61033) : General View : Machine-Maintenance Parts, Cat
25***40O-Ring, H.P. Element Lubrication + Cooling3
26***40Air Cleaner, Cabin Supercharger1
2P***05Oil Filter Cartridge2
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : General View : Painting/Decals/Stop Pads
00***98Plate, German1
24***40Decal Set1
34***40Decal Set H 1352
See all parts with full part numbers in Heavy Parts AI →
Heater And Air Condit. Equipment
Komatsu : H135s-1(S/N G61033) : Heater And Air Condit. Equipment : -Air Conditioning Unit
31***99Screw3
34***99Lock Washer3
46***40Air Conditioning Unit Assembly1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Heater And Air Condit. Equipment : -Compressor
Komatsu : H135s-1(S/N G61033) : Heater And Air Condit. Equipment : -Coupling
Komatsu : H135s-1(S/N G61033) : Heater And Air Condit. Equipment : -H.P. Filter
25***40O-Ring, H.P. Element Lubrication + Cooling1
31***99Screw4
34***99Lock Washer4
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Heater And Air Condit. Equipment : -Heater Assembly
46***40Heat Exchanger1
51***40Heater Consist. Of Fig-Nos: 02-081
69***73Tab 4-Pole1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Heater And Air Condit. Equipment : Air Conditioning Lines
23***40Hose Nw 10x Ca. 6000 mm Bulk Ware, State Length Required1
25***40Hose Fittings2
25***40Hose Fittings2
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Heater And Air Condit. Equipment : Compressor Drive, Air Condit.
Komatsu : H135s-1(S/N G61033) : Heater And Air Condit. Equipment : Hot-Water-Heater, Cat
25***40Hose Dn 12 X Ca. 4000 Lg. Bulk Ware, State Length Required2
25***40Breather Up To 06 1222
25***40Hose Fittings, Straight1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Heater And Air Condit. Equipment : Hydr. For Air Conditioning Equipment
00***98Union1
00***98Union1
15***40Test - Screw Coupling1
See all parts with full part numbers in Heavy Parts AI →
Hydraulic
Komatsu : H135s-1(S/N G61033) : Hydraulic
Komatsu : H135s-1(S/N G61033) : Hydraulic : --Pressure Sequence Stage
10***65O-Ring1
49***40Pressure Sequence Stage Assembly1
50***98O-Ring1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : -Anticavitation Valve
25***40Anticavitation Valve Assembly. Ng 201
36***99O-Ring2
50***98O-Ring1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : -Bleed-Off Valve
00***98O-Ring2
32***40Valve, Pre-Controlled Assembly. 125 Bar0
35***40Pressure Valve For Bullclam Bucket Equipment0
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : -Control Blocks
00***98O-Ring20
16***40Release Valve6
31***99Eye Bolt2
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : -H.P. Filter
31***99Screw4
34***99Lock Washer4
34***40Gasket1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : -H.P. Filter For Fan, Lube- And Pilot Oil
25***40O-Ring, H.P. Element Lubrication + Cooling1
31***99Screw4
34***99Lock Washer4
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : -H.P. Filter For Gear Oil
25***40O-Ring, H.P. Element Lubrication + Cooling1
31***99Screw4
34***99Lock Washer4
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : -Load Limitation Valve
17***40Plug3
33***99Nut1
36***40Load Limitation Valve Assembly. For H 121 (All Diesel Engines)1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : -Pressure Relief Valve
00***98O-Ring1
31***99Screw4
44***40Directional Spool Valve Assembly. With Fig-Nos: 09-141
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : -Slew-Brake Valve
00***98O-Ring2
31***99Bolt4
46***40Brake Valve Assembly1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : -Throttle Check Valve
00***98O-Ring2
18***40O-Ring1
31***99Bolt4
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : Add. Parts Backhoe Control
21***99Pipe ? 12 Ca 300mm Bulk Ware, State Length Required0
25***40Hose Dn 8 X Ca. 2000 Lg. Bulk Ware, State Length Required0
25***40Hose Fittings12
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : Control And Fuel Lines - Control Blocks
00***98Union5
00***98Union3
00***98Union1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : Control Blocks - Oil Tank - Pumps
00***98Half Flange12
00***98Half Flange12
00***98Flange Seal6
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : Control Blocks - Slew Gear
00***98Half Flanged4
00***98Half Flange4
00***98Union1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : Control Clamshell And Drive
00***98Union4
25***40Hose Fittings0
26***40Hose Nw 10x Ca. 8000 mm Bulk Ware, State Length Required0
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : Filter And Valve Arrangement
08***40Pressure Relief Valve (10 Bar)1
15***40Test - Screw Coupling1
17***40Union1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : Hydr. Oil Cooler
00***98Test Socket1
00***98Half Flange2
00***98O-Ring1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : Hydraulic Control
00***98Socket1
00***98Union1
12***40Retainer1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : Lines - Control Blocks - Rotary Joint
00***98Half Flange8
00***98Union1
17***40Plug1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : Lines - Manifold - Basic Boom
00***98Half Flanged12
30***99Bolt24
31***99Screw48
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : Manifold - Control Blocks And H.P. Filter
15***40Test - Screw Coupling9
30***99Bolt (Standard)4
30***99Bolt6
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : Pilot Oil Units L.H., R.H. And L.H. Rear Euro
00***98Union12
25***40Hose Fittings12
25***40Hose Fittings0
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : Piping - Control Blocks - Manifold
31***99Bolt (Standard)96
31***99Bolt32
35***40Flange Seal24
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : Pump Bearing Lubrication With Expansion Tank
25***40Hose Dn 12 X Ca. 4000 Lg. Bulk Ware, State Length Required1
25***40Screwed Fittings1
26***40Hose Fittings1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : Pump Lube And Regulating Equipment
00***98Test Union1
00***98Union1
00***98Socket1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : Throttle Check Valve
08***40O-Ring1
17***40Screw Plug1
25***40Valve Disk1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Hydraulic : Transmission - Oil Cooler
00***98Socket1
00***98Union1
08***40Pressure Relief Valve (10 Bar)1
See all parts with full part numbers in Heavy Parts AI →
Lubrication- And Refueling Equipment
Komatsu : H135s-1(S/N G61033) : Lubrication- And Refueling Equipment : -Lube Pump Station
21***99Pipe ? 10 Bulk Ware, State Length Required0
37***99Union1
55***40Lube Pump Station Consist. Of Fig-Nos: 02-391
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Lubrication- And Refueling Equipment : -Metering Valve
26***40Metering Valve, Assembly1
69***02Nipple1
69***03Adjusting Screw1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Lubrication- And Refueling Equipment : -Pump
00***98O-Ring To Fig-Nos. 61,622
69***14Pin1
69***16Bush With Thread1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Lubrication- And Refueling Equipment : Electric Arr. Superstructure
04***40Dust Cap1
05***40Cable Protection Hose Pg 7 Bulk Ware, State Length Required0
05***40Socket1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Lubrication- And Refueling Equipment : Electric Parts Central Lubr. Backhoe Equipment
04***40Dust Cap2
04***40Plug3
14***40Socket2
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Lubrication- And Refueling Equipment : Hydr. For Grease (1-L)
21***99Pipe ? 12 Ca 300mm Bulk Ware, State Length Required0
25***40Hose Dn 12 X Ca. 4000 Lg. Bulk Ware, State Length Required0
26***40Hose Fittings2
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Lubrication- And Refueling Equipment : Lube Distributor Slew Ring
16***40Hose Assembly. Nw 20x3300 mm1
21***99Pipe ? 12 Ca 300mm Bulk Ware, State Length Required0
21***99Pipe, Assembly. ? 25 Bulk Ware, State Length Required0
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Lubrication- And Refueling Equipment : Lube Lines
21***99Pipe ? 12 Ca 300mm Bulk Ware, State Length Required0
21***99Pipe ? 10x1000 Lg. Bulk Ware, State Length Required0
30***99Screw1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Lubrication- And Refueling Equipment : Lube Lines - Boom - Backhoe Equipment
00***98Mounting Clip1
00***98Mounting Clip1
00***98Union4
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Lubrication- And Refueling Equipment : Lube Lines - Stick - Backhoe Equipment
21***99Pipe ? 10x270 Lg. Bulk Ware, State Length Required0
21***99Pipe ? 16x50 Lg. Bulk Ware, State Length Required4
30***99Bolt4
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Lubrication- And Refueling Equipment : Lube Pump Station Arr.
00***98Locking Spring1
21***99Pipe, Assembly. ? 25 Bulk Ware, State Length Required0
30***99Bolt4
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Lubrication- And Refueling Equipment : Lube Station Arr.
00***98Locking Spring1
26***40Pressure Gauge1
30***99Bolt4
See all parts with full part numbers in Heavy Parts AI →
Operator'S Cab
Komatsu : H135s-1(S/N G61033) : Operator'S Cab : -Sliding Window
32***40Sliding Window Assembly, L.H1
35***40Sliding Window Assembly, R.H1
51***98Screw16
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Operator'S Cab : Aux. Cab Parts
08***40Mirror2
11***40Mirror Bracket, R.H1
16***40Buffer1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Operator'S Cab : Boom, Stick, Slew Gear
34***99Pin2
41***40Pilot Oil Unit Assembly1
50***98O-Ring1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Operator'S Cab : Bullclam Bucket
51***40Pilot Oil Unit Consist. Of Fig-Nos: 02-371
69***73Housing Consist. Of Fig-Nos: 03-101
69***73Housing1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Operator'S Cab : Cab Support And Protection Roof
08***40Lock Assembly1
08***40Handle1
16***40Profiled Joint 4400 Lg. Bulk Ware, State Length Required0
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Operator'S Cab : Colour : Light Grey
Komatsu : H135s-1(S/N G61033) : Operator'S Cab : Cover
16***40Flex. Header Ca. 350 Lg. Bulk Ware, State Length Required0
16***40Flex. Header Ca. 1300 Lg. Bulk Ware, State Length Required0
19***40Shackle6
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Operator'S Cab : Ladder
18***40Limit Switch1
30***99Cable Clamp2
30***99Bolt1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Operator'S Cab : Ladders
30***99Screw15
30***99Screw6
30***99Screw0
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Operator'S Cab : Operator'S Cab
05***40Grommet2
05***40Socket2
05***40Bulb 10 W4
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Operator'S Cab : Operator'S Cab/Glazing
08***40Clamping Section 2800 Lg. (To Fig-Nos. 02,04) Bulk Ware, State Length Required2
08***40Filler Section 3000 Lg. Bulk Ware, State Length Required2
30***40Rear Window 803x4582
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Operator'S Cab : Operator'S Seat
30***99Bolt2
42***40Operator'S Seat Assembly1
50***98Screw3
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Operator'S Cab : Operator'S Stand
26***40Air Cleaner, Cabin Supercharger1
30***40Rubber-Metal Block1
30***40Rubber-Metal Block1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Operator'S Cab : Pilot Control Arr.
30***99Screw3
30***99Bolt1
32***99Screw12
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Operator'S Cab : Pilot Oil Units : Foot Controlled
Komatsu : H135s-1(S/N G61033) : Operator'S Cab : Pilot Oil Units : Hand Controlled
Komatsu : H135s-1(S/N G61033) : Operator'S Cab : Rails And Gratings
26***40Pin5
30***99Lock Washer16
30***99Screw0
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Operator'S Cab : Slew Gear Brake
34***40Pilot Oil Unit Assembly1
69***22Return Spring1
75***73Base Assembly. Consist. Of Fig-Nos: 04-121
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Operator'S Cab : Tension Rod Arr.
00***98Threaded Insert8
30***99Bolt8
30***99Bolt8
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Operator'S Cab : Travelling Gear
33***99Nut1
34***99Pin2
36***40Pilot Oil Unit, Assembly1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Operator'S Cab : Windscreen Washing Assy.
05***40Wiper Motor 120?1
19***40Diaphragm Pump1
19***40Water Reservoir1
See all parts with full part numbers in Heavy Parts AI →
Slew Ring
Komatsu : H135s-1(S/N G61033) : Slew Ring : -Brake
31***99Socket Head Cap Srew12
33***99Seal Ring1
33***99Seal Ring1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Slew Ring : -Hydr. Motor
08***74Component Sealing Applies To Fig-No. 40, 58, 1310
17***40Screw Plug1
24***40O-Ring1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Slew Ring : -Slew Gear Box
30***99Screw12
31***99Plug2
31***99Bolt6
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Slew Ring : Slew Ring And Slew Gear Box Arrangement
12***40Dowel Pin2
18***40Bolt72
22***40Lip Type Seal Ng 25 X 9.200 mm Bulk Ware, State Length Required1
See all parts with full part numbers in Heavy Parts AI →
Superstructure
Komatsu : H135s-1(S/N G61033) : Superstructure
Komatsu : H135s-1(S/N G61033) : Superstructure : -Fan Motor
31***99Screw2
31***99Screw4
34***99Shim Washer 85x105x0,31
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Superstructure : -Filter
33***99Nut1
44***40Aeration Filter, Assembly1
69***89Socket Housing1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Superstructure : -Pressure Relief Valve
31***99Plug1
31***99Eyebolt2
31***99Screw2
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Superstructure : -Return Oil Filter
10***65O-Ring1
33***99Nut2
33***99Nut1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Superstructure : Fuel Tank
05***40Plug 3-Polig1
08***40Oil-Level Glass1
08***40Quick Disconnect Coupling1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Superstructure : Oil Cooler
12***40Hinge2
15***40Tape Roller2
16***40Profiled Joint Ca. 6000 Lg. Bulk Ware, State Length Required0
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Superstructure : Oil Tank
00***98O-Ring1
00***98O-Ring1
00***98O-Ring1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Superstructure : Platform With Counterweight
13***40Pin2
21***40Bolt Lock4
30***99Bolt4
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Superstructure : Suction Tank
08***40Quick Disconnect Coupling1
08***40Protection Cap1
20***40Plug1
See all parts with full part numbers in Heavy Parts AI →
Undercarriage
Komatsu : H135s-1(S/N G61033) : Undercarriage
Komatsu : H135s-1(S/N G61033) : Undercarriage : -Chain
44***40Track (H135-47 Links)1
69***25Spacer4
69***73Track Bush94
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Undercarriage : -Hydr. Motor
08***74Component Sealing Applies To Fig-No. 40, 58, 1310
17***40Screw Plug1
24***40O-Ring1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Undercarriage : -Top Roller
18***40Sliding Ring Seal1
30***99Bolt3
30***99Screw2
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Undercarriage : -Track Roller
00***98O-Ring1
11***40Bottom Roller Assembly1
14***40Lifetime Seal2
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Undercarriage : -Track Shoes 600 Wide
Komatsu : H135s-1(S/N G61033) : Undercarriage : -Traction Transmission
00***98O-Ring1
20***40Mechanical Seal1
30***99Bolt15
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Undercarriage : Grease Tensioning Cylinder
18***40Wiper1
18***40V-Seal1
18***40Piston Ring2
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Undercarriage : Hydraulic
00***98Half Flanged8
00***98Half Flange8
00***98O-Ring4
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Undercarriage : Idler Assy.
00***99Top Roller Is Filled With Oil0
00***98O-Ring2
18***40Lifetime Seal2
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Undercarriage : Rotary Joint
16***40Screw Plug4
20***40Screw Plug2
30***99Bolt4
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Undercarriage : Track Adjuster (Nitrogen)
20***40Plug1
20***40Piston Ring2
20***40Piston Ring1
See all parts with full part numbers in Heavy Parts AI →
Komatsu : H135s-1(S/N G61033) : Undercarriage : Undercarriage
25***40Hv-Washer36
25***40Hv-Washer48
30***99Bolt 200lg. (Standard)72
See all parts with full part numbers in Heavy Parts AI →

Frequently asked questions

What engine does the Komatsu H135S-1 use?

The Komatsu H135S-1 uses a Komatsu diesel engine. Specific engine model and horsepower ratings vary by configuration and series; consult the machine's data plate or operation and maintenance manual for exact specifications.

What is the operating weight of the Komatsu H135S-1?

The operating weight of the Komatsu H135S-1 varies by configuration and series, typically ranging around 308,647 lb (140,000 kg). Exact weight depends on the installed boom, stick, counterweight, and track shoe configuration.

What model replaced the Komatsu H135S-1?

The Komatsu H135S-2 is the successor to the H135S-1 hydraulic shovel. It features updated hydraulic systems and undercarriage improvements for enhanced durability and performance in mining applications.

What H135S-1(S/N G61033) owners discuss

What are the typical hydraulic behaviors and failure modes for the Komatsu H135S-1 series?
Operators report that hydraulic weakness often correlates with oil temperature. Functions operating normally when cold may become sluggish as the hydraulic oil warms, indicating internal leakage in the main pump or control valve. A common diagnostic pattern is distinguishing between single-function slowness (cylinder or valve specific) and global slowness (pump, filter, or engine speed related). The line is noted for smooth operation but complex hydraulic schematics that require careful troubleshooting to avoid unnecessary component replacement. If one pump fails, the engine load may be compromised shortly after, often impacting resale value.
What undercarriage and wear patterns are typical for this machine type?
Undercarriage components, including track pads, bushings, and bearings, are subject to significant wear from abrasive environments. Worn bushings can lead to increased noise and vibration, while bearing failure may cause premature track issues. Track tension must be monitored regularly, as repeated loosening often points to adjuster or component wear. Mechanical resistance from mud or debris packed into the undercarriage can also cause the machine to pull to one side during travel; this should be checked before diagnosing hydraulic travel motor faults.
What are the known engine quirks for this series?
Engine performance issues, such as power loss under load or increased fuel consumption, often stem from airflow restrictions, injector wear, or failing fuel delivery components. Contamination, extended service intervals, and low-quality fuel accelerate wear. Overheating during heavy excavation is a common concern, often caused by material packed between the radiator, hydraulic oil cooler, and charge-air cooler. A loss of power when combining boom, arm, and bucket movements may indicate the hydraulic system is dragging the engine down rather than an engine fault.
What are the common electrical and sensor issues?
Komatsu excavators rely heavily on electronic control systems. A single faulty sensor or unstable power supply can trigger multiple warning signals. Owners frequently report intermittent starting, dashboard failures, or random machine shutdowns. Multiple fault codes often point to battery state, ground connections, or connector integrity rather than individual component failure. Intermittent electrical issues should be diagnosed by checking power supply stability and sensor functionality before replacing control panels.
What should be checked when buying a used Komatsu H135S-1 (S/N G61033)?
Verify the exact serial prefix specification sheet and installed attachment package, as configurations vary. Check the engine oil level and cooling system for blockages. Test the battery with a multimeter to rule out weak or aged power sources. Inspect the hydraulic system for leaks, stuck components, and adequate fluid levels. Examine bushings, bearings, and track pads for wear that could lead to noise or premature failure. Ensure the main safety valve is operating normally, as its failure can disrupt the entire hydraulic system. Confirm the machine's history and maintenance records to identify any pre-existing damage or improper upkeep.
What safety-critical fix requires dealer verification?
The main safety valve is critical for the smooth operation of the entire hydraulic system. Its normal operation must be verified by a dealer to ensure safety protocols are met. Have your dealer verify the main safety valve operation and calibration.

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 H135S-1(S/N G61033). Related factory variants of the same model family:

H135S-1(S/N G61008)H135S-1(S/N G61027)H135S-1(S/N G61064)H135S-1(S/N G61001)H135S-1(S/N G61007)H135S-1(S/N G61045)H135S-1(S/N G61026)

Need a specific H135S-1(S/N G61033) part?

Search live OEM part data, check fitment, and cross-reference alternatives with Heavy Parts AI.