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Komatsu HM350-2 specifications

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Short answer

Komatsu HM350-2: articulated dump truck.

Selected configuration figures
ConfigurationDocumented field and quantity
HM350-2
Gross Power
408 hp
Overall Length
36.58 ft
HM350-2 specification matrix — Dimensions and weight
SpecificationHM350-2
Overall Length36.58 ft
Overall Width10.67 ft
Overall Height11.83 ft
Wheelbase17.25 ft
Ground Clearance1.92 ft
Dump Height23.08 ft
Dump Ground Clearance2.33 ft
Dump
SpecificationHM350-2
Dump Angle70 degrees
Capacity - Heaped25.9 yd3
Capacity - Struck19.11 yd3
Engine
SpecificationHM350-2
Number Of Cylinders6
Engine ModelSAA6D140E-5
Gross Power408 hp
Net Power394 hp
AspirationTurbo-charged
Displacement930 cu in
Operational
SpecificationHM350-2
Fuel Capacity130.3 gal
Hydraulic System Fluid Capacity47.6 gal
Engine Oil Capacity13.2 gal
Transmission and speeds
SpecificationHM350-2
Transmission Typefull-automatic, counter-shaft type
Number Of Forward Gears6
Number Of Reverse Gears2
Max Speed35.5 mph
Weights
SpecificationHM350-2
Center Axle - Empty14796 %
Front Axle - Empty39,319 lb
Rear Axle - Empty14,385 lb
Front Axle - Loaded44488 %
Center Axle - Loaded47846 %
Rear Axle - Loaded47,566 lb
Total Empty68,500 lb
Total Loaded139,900 lb
Ratios
FigureHM350-2
Engine horsepower per 1,000 lb of weight5.8
Fuel tank per engine horsepower0.33 gal
Reference directory classification
Equipment grouparticulated dump truck
Where the HM350-2 ranks in Komatsu's list — Scope of the captured comparison
BrandEquipment groupCompared entrySort order
Komatsuarticulated dump truckHM350-2Descending quantity; 1 is largest
Historical ranking before the HM300-5 weight correction; retained for reference, not a current performance ranking
FigureHM350-2RankLowest in lineHighest in line
Engine power394.0 hp1 of 6240.0 hp394.0 hp
Listed weight68,500 lb1 of 656 lb68,500 lb
Fuel capacity130.3 gal1 of 566.1 gal130.3 gal
Horsepower per 1,000 lb5.8 hp6 of 65.8 hp5,796.4 hp

The HM350-2 beside its neighbours

Base versionHM300-5HM350-2
Engine power324.6 hp394 hp
Weight55,986 lb68,500 lb
Fuel capacity102.5 gal130.3 gal
Wheelbase13.46 ft17.25 ft
Rated payloadHM300-5:30.9 US tons (28.0 metric tonnes); rounded conversion61,800 lb
HM350-2: forum references — Forum-title search
Forum indexEquipment class queriedNames in the searchMatching titles
Heavy Equipment Forumsarticulated dump truckKomatsu and the HM350 line that the HM350-2 belongs to (no title names the exact model). That is too few titles to say what owners mostly ask about, so the most recent are listed instead1
Used market for the HM350-2 — Dated first-page listing snapshot
Observation dateListing sourceEquipment searchListings
2026-09-24MachineryTraderKomatsu articulated dump truck3
ModelListedModel yearsLowest askingHighest askingMedian askingMedian hours
HM350-232006 to 2008$69,000$69,000$69,0009,031
HM350-2: recall reference — Dated CPSC search
Search dateDatabaseNames queriedSearch result
2026-09-24U.S. Consumer Product Safety CommissionKomatsu together with the articulated dump truck HM350-2No matching recall in this search

Sources for this page

Evidence classDocument, classification and recorded date
Reference site
Forum threads
Used-market listings
Federal agency data
HM300-5 corrections and retained earlier entries — Rejected transcriptions and explicitly rounded manufacturer conversions
FieldEarlier reference entryCorrected quantity and scope
Total Empty56 lb55,986 lb; Approximate empty machine:25,395kg, not loaded vehicle mass Komatsu specification
Total Loaded117.9 lb117,892 lb; Approximate gross vehicle weight:53,475kg Komatsu specification
Max Torque1.3 lb-ft1,237 lb-ft; Manufacturer engine maximum torque,171kg-m Komatsu specification
Number Of Reverse Gears62; F6-R2 automatic countershaft transmission Komatsu specification
DEF Tank Capacity18.9 gal8.7 gal; 32.8L DEF;18.9USgal belongs to total differentials Komatsu specification
Hoist CylinderTwin, 1-stage typeTwin, telescopic type; Manufacturer hydraulic-system description Komatsu specification
Hoist Time10.510.5 sec; Brochure supplies the missing seconds unit Komatsu specification
Rated Payload56,000 lb61,800 lb; Rounded conversion only:30.9USshorttons×2000; manufacturer also prints28.0metrictonnes Komatsu specification
Capacity - Heaped22.37 yd322.4 yd3; Manufacturer heaped SAE2:1 body volume17.1m3; earlier reference rounding retained Komatsu specification
Earlier power-to-weight result5,796.4 hp per1,000lb, rejected324.6hp ÷55,986lb ×1000 =5.8hp per1,000lb, rounded; numerator retains the historical reference edition.
Earlier payload/body result2,503lb peryd3, rejected61,800lb ÷22.4yd3 =2,759lb peryd3, rounded. Uses rounded short-ton conversion; not an allowable material density.

Komatsu HM350-2: Configuration records

HM350-2
SpecificationSource figure
Dimensions and weight
Overall Length36.58 ft
Overall Width10.67 ft
Overall Height11.83 ft
Wheelbase17.25 ft
Ground Clearance1.92 ft
Dump Height23.08 ft
Dump Ground Clearance2.33 ft
Dump
Capacity - Heaped25.9 yd3
Dump Angle70 degrees
Capacity - Struck19.11 yd3
Engine
Number Of Cylinders6
Engine ModelSAA6D140E-5
Gross Power408 hp
Net Power394 hp
Displacement930 cu in
AspirationTurbo-charged
Operational
Fuel Capacity130.3 gal
Hydraulic System Fluid Capacity47.6 gal
Engine Oil Capacity13.2 gal
Transmission and speeds
Number Of Forward Gears6
Max Speed35.5 mph
Transmission Typefull-automatic, counter-shaft type
Number Of Reverse Gears2
Weights
Front Axle - Empty39,319 lb
Rear Axle - Empty14,385 lb
Front Axle - Loaded44488 %
Rear Axle - Loaded47,566 lb
Total Empty68,500 lb
Total Loaded139,900 lb
Center Axle - Empty14796 %
Center Axle - Loaded47846 %

Source

More in Komatsu: HM300-3/HM400-3, HM300-2/HM400-3M0, HA250-3/HA270-3.