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PM schedule · Articulated truck

Komatsu HM400-5 maintenance schedule

Service intervals, fluids and filters for the Komatsu HM400-5. Full specs, part numbers and heavy-duty intervals are in goAardvark.

  • Series -5
  • Engine Komatsu SAA6D140E-7
  • Emissions EPA Tier 4 Final
  • Size class 40 t
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Source: Komatsu HM400-5 Operation & Maintenance Manual · Last verified October 29, 2026 · Always confirm with the operator's manual for your serial number

What's due next?

Enter the hour meter (SMU) reading to see what's coming up.

hr

  • 1,000 hr service

    Includes 500 hr, 250 hr

    at 3,000In 160 hr

  • 250 hr service

    at 3,250In 410 hr

  • 500 hr service

    Includes 250 hr

    at 3,500In 660 hr

  • 250 hr service

    at 3,750In 910 hr

Shows the next four service stops. Red means due within 50 hours; amber, within 250. goAardvark tracks this automatically from telematics hours, across every make in your fleet.

The short answer

On the Komatsu HM400-5, change the engine oil every 500 service hours. Change the hydraulic oil every 1,000 hours. The engine oil system holds 50 L (13.2 US gal).

Service intervals

Pick an interval. Each service includes everything from the shorter intervals that fall on the same hour.

Every 50 hours

0 of 1 done

Fluids and capacities 3 of 8 shown

SystemSpecCapacity
Engine oil—50 L13.2 gal
Hydraulic system—167 L44.1 gal
Fuel tank—525 L138.7 gal
Torque converter, transmission and retarder coolingAvailable in goAardvarkAvailable in goAardvark
Differentials (total)Available in goAardvarkAvailable in goAardvark
Final drives (total)Available in goAardvarkAvailable in goAardvark
SuspensionAvailable in goAardvarkAvailable in goAardvark
DEF tankAvailable in goAardvarkAvailable in goAardvark

5 more systems with specs and capacities are in goAardvark.

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Filters 2 of 13 shown

FilterPart numberChange at
Engine oil filterAvailable in goAardvark500 hr
Hydraulic oil filter elementAvailable in goAardvark1,000 hr
Fuel prefilterAvailable in goAardvarkAvailable in goAardvark
Fuel main filterAvailable in goAardvarkAvailable in goAardvark
Transmission oil filter (valve side)Available in goAardvarkAvailable in goAardvark
Transmission oil filter (brake cooling side)Available in goAardvarkAvailable in goAardvark
Brake oil filter elementAvailable in goAardvarkAvailable in goAardvark
Fuel tank breather elementAvailable in goAardvarkAvailable in goAardvark
DEF tank breather elementAvailable in goAardvarkAvailable in goAardvark
Hydraulic tank breather elementAvailable in goAardvarkAvailable in goAardvark
KCCV filter elementAvailable in goAardvarkAvailable in goAardvark
DEF filterAvailable in goAardvarkAvailable in goAardvark
Air cleanerAvailable in goAardvarkAvailable in goAardvark

All 13 filters with part numbers are in goAardvark.

Unlock full specs

Fleet PM snapshot

Add up to 5 machines to see when each one hits its next service. This is free and needs no sign-up.

MachineHours nowHours per weekNext serviceAround

1,000 hr at 3,000

160 hr
Dec 8
1 of 5 machines
This snapshot is out of date as soon as the machines run. If your Komatsu HM400-5 runs 52 hr a week instead of 40, its service lands around Dec 2. If it sits at 24 hr a week, around Dec 27. goAardvark reads real hours from Cat, Deere, Komatsu and Volvo telematics every day, so the dates stay right.
See it live with your fleetRequest a demo and we'll show these machines in goAardvark.

Official Komatsu maintenance resources

ManualFree account

My Komatsu portal (manuals, parts books, software)

Komatsu's customer portal gives owners online access to parts and service manuals, machine data and parts ordering.

Fluid analysisThrough dealer

Komatsu Oil and Wear Analysis (KOWA)

Komatsu's oil sampling program analyzes lubricants at Komatsu labs to flag wear and contamination before failures.

TelematicsFree account

Komtrax via My Komatsu

Komtrax machine data, maintenance reminders and health alerts are viewed in the My Komatsu portal.

Maintenance guideThrough dealer

Komatsu CARE complimentary maintenance

New Komatsu machines get factory scheduled maintenance at set hour intervals for the first 3 years or 2,000 hours.

CoveragePurchase

Komatsu CARE Plus, Plus II, Plus III and Care Advantage

Paid plans that extend scheduled maintenance and add repair coverage beyond the standard warranty.

PartsThrough dealer

Komatsu CARE preventive maintenance kits

Packaged genuine filter and parts kits for planned maintenance, requested through a Komatsu distributor.

PartsFree account

Komatsu genuine parts and filters

Komatsu's parts catalog covers genuine filters, fluids and reman components, with online ordering through My Komatsu.

PartsFree

Komatsu quick reference parts guides

Model-specific PDF guides listing maintenance part numbers, fluids and capacities for selected Komatsu machines.

Your HM400-5 isn't the only machine due for service

Most fleets run several makes side by side. Each has its own manual, intervals and telematics portal. goAardvark pulls hours from all of them and builds one PM schedule for the whole fleet.

Book a demoSnapshot my fleet

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Frequently asked questions

Every 500 service hours under normal operating conditions. Confirm the interval for your serial number in the operator's manual.

Sources

Komatsu and other product names are trademarks of their owners. goAardvark is not affiliated with any equipment manufacturer. This page summarizes public information for planning; your operator's manual is the authority for your serial number.

Preventive maintenance · Field checklist

Komatsu HM400-5 PM checklist

Unit #
Serial number
Hour meter
Technician
Date

50 hr

Service taskComponent
Grease lubrication pointsMachine

250 hr

Service taskComponent
Grease lubrication pointsMachine
Check drive shaftsDrivetrain
Clean breathersMachine
Check battery electrolyte levelElectrical
Check frame and A-armMachine
Check foot, retarder and parking brake performanceBrakes
Check parking brake pad wearBrakes
Check accumulator functionBrakes

500 hr

Service taskComponent
Change engine oil and filtersEngine
Replace fuel prefilterFuel
Grease cab mounting pinsCab
Check differential oil levelAxles
Check and clean radiator, aftercooler and A/C condenser finsCooling
Check final drive oil levelDrivetrain

1,000 hr

Service taskComponent
Replace hydraulic oil filter elementHydraulics
Replace fuel main filterFuel
Replace fuel tank breather elementFuel
Replace transmission oil filter elementsDrivetrain
Change transmission oilDrivetrain
Change brake oil and replace brake oil filterBrakes
Grease parking brakeBrakes
Check brake disc wearBrakes
Check engine intake pipe clampsEngine
Replace DEF tank breather elementAftertreatment
Check drive belt tension pulley for alternator and A/C compressorElectrical

2,000 hr

Service taskComponent
Change final drive oilDrivetrain
Change differential oilAxles
Replace hydraulic tank breather elementHydraulics
Clean transmission case strainerDrivetrain
Check accumulator gas pressureBrakes
Replace DEF filterAftertreatment
Replace KCCV filter elementEngine
Check and adjust engine valve clearanceEngine
Check alternatorElectrical

4,000 hr

Service taskComponent
Change hydraulic oilHydraulics
Check water pumpCooling
Replace defined life partsMachine
Check starting motorElectrical
Check engine high-pressure piping clamps and rubberFuel

4,500 hr

Service taskComponent
Clean KDPFAftertreatment
Clean DEF tankAftertreatment
Clean fuel doserAftertreatment

8,000 hr

Service taskComponent
Replace engine high-pressure piping clampsFuel
Replace fuel spray prevention capsFuel
Overhaul starting motor and alternatorElectrical
Replace DEF hoseAftertreatment

First 250 hr

Service taskComponent
Replace transmission filter elements (valve side and brake cooling side)Drivetrain
Change transmission oilDrivetrain
Change brake oil and replace brake oil filterBrakes
Change final drive oilDrivetrain
Change differential oilAxles

When required

Service taskComponent
Check, clean or replace air cleaner elementEngine
Clean inside of cooling systemCooling
Check and service air conditionerCab
Check dump bodyMachine
Check suspension cylinder lengthMachine
Check tiresMachine
Adjust parking brakeBrakes
Check and adjust body mountsMachine

Source: Komatsu HM400-5 Operation & Maintenance Manual. Always confirm with the operator's manual for your serial number.