Machine models

Komatsu HD180-4 to HD405-6 specifications

Entries in this reference
Listing-entry count
6

Short answer

Komatsu HD180-4 to HD405-6: rigid rock trucks.

Selected configuration figures
Configuration	Documented field and quantity
HD180-4	Gross Power 230 hp Overall Length 23.94 ft
HD200-2	Gross Power 280 hp Overall Length 24.45 ft
HD320-3	Gross Power 405 hp Overall Length 25.1 ft
HD325-3	Gross Power 438 hp Overall Length 25.1 ft
HD325-6	Gross Power 508 hp Overall Length 28.55 ft
HD405-6	Gross Power 508 hp Overall Length 28.55 ft

HD180-4 to HD405-6 specification matrix — Listing labels reported by the source
Publisher name	Source guide	Listing-entry count	Labels named by the source
Komatsu	HD180-4 to HD405-6	6	HD180-4, HD200-2, HD320-3, HD325-3, HD325-6, and HD405-6

Dimensions and weight
Specification	HD180-4	HD200-2	HD320-3	HD325-3	HD325-6	HD405-6
Overall Length	23.94 ft	24.45 ft	25.1 ft	25.1 ft	28.55 ft	28.55 ft
Overall Width	9.85 ft	10.5 ft	12.05 ft	12.05 ft	14.85 ft	14.85 ft
Overall Height	10.83 ft	11.32 ft	12.64 ft	12.96 ft	14.05 ft	13.85 ft
Wheelbase	13.13 ft	12.31 ft	12.31 ft	12.31 ft	12.31 ft	12.31 ft
Dump Height	20.02 ft	21 ft	24.68 ft	25 ft	25.87 ft	25.87 ft
Dump Ground Clearance	1.56 ft	1.51 ft	1.45 ft	1.78 ft	1.74 ft	2.07 ft

Specification	HD180-4	HD200-2	HD320-3	HD325-3
Ground Clearance	1.27 ft	1.38 ft	1.51 ft	1.74 ft

Dump
Specification	HD180-4	HD200-2	HD320-3	HD325-3	HD405-6
Dump Angle	65 degrees	65 degrees	61 degrees	61 degrees	48 degrees
Rated Payload	36,000 lb	40,000 lb	64,000 lb	64,000 lb	90,000 lb

Specification	HD180-4	HD200-2	HD325-6	HD405-6
Load Capacity - Struck	14 yd3	14.65 yd3	23.55 yd3	26.16 yd3
Raise Time	8 sec	8 sec	10 sec	10 sec

Specification	HD180-4	HD200-2	HD320-3	HD325-3	HD325-6	HD405-6
Load Capacity - Heaped	18.58 yd3	19.89 yd3	31.4 yd3	31.4 yd3	31.4 yd3	35.71 yd3

Engine
Specification	HD180-4	HD200-2	HD320-3	HD325-3	HD325-6	HD405-6
Engine Model	Cummins NTO-6-B	Cummins NTC-743-C	NTA855	KT1150	SAA6D140E-3	SAA6D140E-3
Gross Power	230 hp	280 hp	405 hp	438 hp	508 hp	508 hp
Displacement	743 cu in	743 cu in	855 cu in	1,150 cu in	929.4 cu in	929.4 cu in

Specification	HD320-3	HD325-3	HD325-6	HD405-6
Aspiration	turbocharged	turbocharged	Turbocharged	turbocharged

Specification	HD325-6	HD405-6
Number Of Cylinders	6	6
Net Power	488 hp	488 hp
Power Measured @	2,000 rpm	2,000 rpm

Operational
Specification	HD180-4	HD200-2	HD320-3	HD325-3	HD325-6	HD405-6
Tire Size	front 14.00-25-20PR, rear 16.00-25-24PR	16.00-25-24PR	18.00-25-32	18.00-33-28	18.00R33	18.00R33

Specification	HD320-3	HD325-3	HD325-6	HD405-6
Fuel Capacity	132.1 gal	132.1 gal	132.1 gal	132.1 gal
Cooling System Fluid Capacity	35.2 gal	35.2 gal	23.6 gal	23.6 gal
Engine Oil Capacity	6.7 gal	10.1 gal	13.8 gal	13.8 gal
Diff And Final Drive Fluid Capacity	18.8 gal	18.8 gal	15.4 gal	15.4 gal
Hydraulic System Fluid Capacity	29.1 gal	29.1 gal	34.1 gal	34.1 gal

Transmission and speeds
Specification	HD180-4	HD200-2	HD320-3	HD325-3	HD325-6	HD405-6
Transmission Type	constant mesh	TCS-41-6C Torque Converter and TORQFLOW	Komatsu TORQFLOW planetary gear	planetary gear	full-automatic	Full-automatic, planetary type
Number Of Gears - Forward	7	6	6	6	7	7
Number Of Gears - Reverse	1	1	1	1	1	1
Max Speed	32.4 mph	31.1 mph	38.6 mph	38.6 mph	43.2 mph	43.5 mph

Weights
Specification	HD180-4	HD200-2	HD320-3	HD325-3	HD325-6	HD405-6
Empty Weight	37,016 lb	40,786 lb	56,769 lb	58,643 lb	68,961 lb	75,134 lb
Loaded Weight	76,941 lb	84,999 lb	127,317 lb	129,191 lb	149,429 lb	163,484 lb
Weight Distribution Front - Empty	42.1 %	47.6 %	48 %	48 %	48 %	48 %
Weight Distribution Rear - Empty	57.9 %	52.4 %	52 %	52 %	52 %	52 %
Weight Distribution Front - Loaded	25 %	30.1 %	32 %	32 %	32 %	32 %
Weight Distribution Rear - Loaded	75 %	69.9 %	68 %	68 %	68 %	68 %

Variants — Source comparison annotation
Source guide	Differing-field count reported
HD180-4 to HD405-6	34

Ratios
Figure	HD180-4	HD200-2	HD320-3	HD325-3	HD325-6	HD405-6
Engine horsepower per 1,000 lb of weight	6.2	6.9	7.1	7.5	7.1	6.5

Figure	HD320-3	HD325-3	HD325-6	HD405-6
Fuel tank per engine horsepower	0.33 gal	0.30 gal	0.27 gal	0.27 gal

Figure	HD180-4	HD200-2	HD320-3	HD325-3	HD405-6
Rated payload per cubic yard of heaped body	1,938 lb	2,011 lb	2,038 lb	2,038 lb	2,520 lb

HD180-4 to HD405-6: forum references

Dated forum-index scope
Forum index	Exact-model query	Exact-model title matches	Broader equipment query	Broader title matches
Heavy Equipment Forums	Komatsu rigid rock truck	0	Komatsu rigid rock trucks	3

Komatsu 325 Haul Truck Trouble Code Question (Heavy Equipment Forums, 2017-09-06)
Komatsu Dump Truck 830e Field Assemble Manual (Heavy Equipment Forums, 2012-12-22)
Komatsu Dump Truck (Heavy Equipment Forums, 2012-10-24)

Used market for the HD180-4 to HD405-6 — Dated first-page listing snapshot
Observation date	Listing source	Equipment search	Listings
2026-09-24	MachineryTrader	Komatsu rigid rock truck	10

Model	Listed	Model years	Lowest asking	Highest asking	Median asking	Median hours
HD325-6	7	1998 to 2008	$27,500	$90,000	$53,500	15,160
HD405-6	3	2000 to 2005	$88,000	$88,000	$88,000	None shown

HD180-4 to HD405-6: recall reference — Dated CPSC search
Search date	Database	Names queried	Search result
2026-09-24	U.S. Consumer Product Safety Commission	Komatsu together with the rigid rock truck HD180-4, HD200-2, HD320-3, HD325-3	No matching recall in this search

Sources for this page
Evidence class	Document, classification and recorded date
Reference site	Reference site: Komatsu HD180-4 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu HD200-2 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu HD320-3 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu HD325-3 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu HD325-6 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu HD405-6 — RitchieSpecs. Observed 2026-09-24.
Forum threads	Forum threads: Heavy Equipment Forums thread index for Komatsu HD180-4 to HD405-6 — Heavy Equipment Forums. Observed 2026-09-24.
Used-market listings	Used-market listings: MachineryTrader listings for Komatsu HD325-6 — MachineryTrader. Observed 2026-09-24.
Federal agency data	Federal agency data: Recall database search for Komatsu — U.S. Consumer Product Safety Commission. Observed 2026-09-24.

Komatsu HD180-4 to HD405-6: Configuration records

HD180-4

Specification	Source figure
Dimensions and weight
Overall Length	23.94 ft
Overall Width	9.85 ft
Overall Height	10.83 ft
Wheelbase	13.13 ft
Ground Clearance	1.27 ft
Dump Height	20.02 ft
Dump Ground Clearance	1.56 ft
Dump
Dump Angle	65 degrees
Load Capacity - Struck	14 yd3
Load Capacity - Heaped	18.58 yd3
Rated Payload	36,000 lb
Raise Time	8 sec
Engine
Engine Model	Cummins NTO-6-B
Gross Power	230 hp
Displacement	743 cu in
Operational
Tire Size	front 14.00-25-20PR, rear 16.00-25-24PR
Transmission and speeds
Transmission Type	constant mesh
Number Of Gears - Forward	7
Number Of Gears - Reverse	1
Max Speed	32.4 mph
Weights
Empty Weight	37,016 lb
Loaded Weight	76,941 lb
Weight Distribution Front - Empty	42.1 %
Weight Distribution Rear - Empty	57.9 %
Weight Distribution Front - Loaded	25 %
Weight Distribution Rear - Loaded	75 %

Source

HD200-2

Specification	Source figure
Dimensions and weight
Overall Length	24.45 ft
Overall Width	10.5 ft
Overall Height	11.32 ft
Wheelbase	12.31 ft
Ground Clearance	1.38 ft
Dump Height	21 ft
Dump Ground Clearance	1.51 ft
Dump
Dump Angle	65 degrees
Load Capacity - Struck	14.65 yd3
Load Capacity - Heaped	19.89 yd3
Rated Payload	40,000 lb
Raise Time	8 sec
Engine
Engine Model	Cummins NTC-743-C
Gross Power	280 hp
Displacement	743 cu in
Operational
Tire Size	16.00-25-24PR
Transmission and speeds
Transmission Type	TCS-41-6C Torque Converter and TORQFLOW
Number Of Gears - Forward	6
Number Of Gears - Reverse	1
Max Speed	31.1 mph
Weights
Empty Weight	40,786 lb
Loaded Weight	84,999 lb
Weight Distribution Front - Empty	47.6 %
Weight Distribution Rear - Empty	52.4 %
Weight Distribution Front - Loaded	30.1 %
Weight Distribution Rear - Loaded	69.9 %

Source

HD320-3

Specification	Source figure
Dimensions and weight
Overall Length	25.1 ft
Overall Width	12.05 ft
Overall Height	12.64 ft
Wheelbase	12.31 ft
Ground Clearance	1.51 ft
Dump Height	24.68 ft
Dump Ground Clearance	1.45 ft
Dump
Dump Angle	61 degrees
Load Capacity - Heaped	31.4 yd3
Rated Payload	64,000 lb
Engine
Engine Model	NTA855
Gross Power	405 hp
Displacement	855 cu in
Aspiration	turbocharged
Operational
Tire Size	18.00-25-32
Fuel Capacity	132.1 gal
Cooling System Fluid Capacity	35.2 gal
Engine Oil Capacity	6.7 gal
Diff And Final Drive Fluid Capacity	18.8 gal
Hydraulic System Fluid Capacity	29.1 gal
Transmission and speeds
Transmission Type	Komatsu TORQFLOW planetary gear
Number Of Gears - Forward	6
Number Of Gears - Reverse	1
Max Speed	38.6 mph
Weights
Empty Weight	56,769 lb
Loaded Weight	127,317 lb
Weight Distribution Front - Empty	48 %
Weight Distribution Rear - Empty	52 %
Weight Distribution Front - Loaded	32 %
Weight Distribution Rear - Loaded	68 %

Source

HD325-3

Specification	Source figure
Dimensions and weight
Overall Length	25.1 ft
Overall Width	12.05 ft
Overall Height	12.96 ft
Wheelbase	12.31 ft
Ground Clearance	1.74 ft
Dump Height	25 ft
Dump Ground Clearance	1.78 ft
Dump
Dump Angle	61 degrees
Load Capacity - Heaped	31.4 yd3
Rated Payload	64,000 lb
Engine
Engine Model	KT1150
Gross Power	438 hp
Displacement	1,150 cu in
Aspiration	turbocharged
Operational
Tire Size	18.00-33-28
Fuel Capacity	132.1 gal
Cooling System Fluid Capacity	35.2 gal
Engine Oil Capacity	10.1 gal
Diff And Final Drive Fluid Capacity	18.8 gal
Hydraulic System Fluid Capacity	29.1 gal
Transmission and speeds
Transmission Type	planetary gear
Number Of Gears - Forward	6
Number Of Gears - Reverse	1
Max Speed	38.6 mph
Weights
Empty Weight	58,643 lb
Loaded Weight	129,191 lb
Weight Distribution Front - Empty	48 %
Weight Distribution Rear - Empty	52 %
Weight Distribution Front - Loaded	32 %
Weight Distribution Rear - Loaded	68 %

Source

HD325-6

Specification	Source figure
Dimensions and weight
Overall Length	28.55 ft
Overall Width	14.85 ft
Overall Height	14.05 ft
Wheelbase	12.31 ft
Dump Height	25.87 ft
Dump Ground Clearance	1.74 ft
Dump
Load Capacity - Struck	23.55 yd3
Load Capacity - Heaped	31.4 yd3
Raise Time	10 sec
Engine
Engine Model	SAA6D140E-3
Gross Power	508 hp
Displacement	929.4 cu in
Aspiration	Turbocharged
Number Of Cylinders	6
Net Power	488 hp
Power Measured @	2,000 rpm
Operational
Tire Size	18.00R33
Fuel Capacity	132.1 gal
Cooling System Fluid Capacity	23.6 gal
Engine Oil Capacity	13.8 gal
Diff And Final Drive Fluid Capacity	15.4 gal
Hydraulic System Fluid Capacity	34.1 gal
Transmission and speeds
Transmission Type	full-automatic
Number Of Gears - Forward	7
Number Of Gears - Reverse	1
Max Speed	43.2 mph
Weights
Empty Weight	68,961 lb
Loaded Weight	149,429 lb
Weight Distribution Front - Empty	48 %
Weight Distribution Rear - Empty	52 %
Weight Distribution Front - Loaded	32 %
Weight Distribution Rear - Loaded	68 %

Source

HD405-6

Specification	Source figure
Dimensions and weight
Overall Length	28.55 ft
Overall Width	14.85 ft
Overall Height	13.85 ft
Wheelbase	12.31 ft
Dump Height	25.87 ft
Dump Ground Clearance	2.07 ft
Dump
Dump Angle	48 degrees
Load Capacity - Struck	26.16 yd3
Load Capacity - Heaped	35.71 yd3
Rated Payload	90,000 lb
Raise Time	10 sec
Engine
Engine Model	SAA6D140E-3
Gross Power	508 hp
Displacement	929.4 cu in
Aspiration	turbocharged
Number Of Cylinders	6
Net Power	488 hp
Power Measured @	2,000 rpm
Operational
Tire Size	18.00R33
Fuel Capacity	132.1 gal
Cooling System Fluid Capacity	23.6 gal
Engine Oil Capacity	13.8 gal
Diff And Final Drive Fluid Capacity	15.4 gal
Hydraulic System Fluid Capacity	34.1 gal
Transmission and speeds
Transmission Type	Full-automatic, planetary type
Number Of Gears - Forward	7
Number Of Gears - Reverse	1
Max Speed	43.5 mph
Weights
Empty Weight	75,134 lb
Loaded Weight	163,484 lb
Weight Distribution Front - Empty	48 %
Weight Distribution Rear - Empty	52 %
Weight Distribution Front - Loaded	32 %
Weight Distribution Rear - Loaded	68 %

Source

Compare Komatsu HD180-4, HD200-2, HD320-3, HD325-3, HD325-6, HD405-6

Dimensions and weight
Specification	HD180-4	HD200-2	HD320-3	HD325-3	HD325-6	HD405-6
Overall Length	23.94 ft	24.45 ft	25.1 ft	25.1 ft	28.55 ft	28.55 ft
Overall Width	9.85 ft	10.5 ft	12.05 ft	12.05 ft	14.85 ft	14.85 ft
Overall Height	10.83 ft	11.32 ft	12.64 ft	12.96 ft	14.05 ft	13.85 ft
Wheelbase	13.13 ft	12.31 ft	12.31 ft	12.31 ft	12.31 ft	12.31 ft
Dump Height	20.02 ft	21 ft	24.68 ft	25 ft	25.87 ft	25.87 ft
Dump Ground Clearance	1.56 ft	1.51 ft	1.45 ft	1.78 ft	1.74 ft	2.07 ft

Dump
Specification	HD180-4	HD200-2	HD320-3	HD325-3	HD325-6	HD405-6
Load Capacity - Heaped	18.58 yd3	19.89 yd3	31.4 yd3	31.4 yd3	31.4 yd3	35.71 yd3

Engine
Specification	HD180-4	HD200-2	HD320-3	HD325-3	HD325-6	HD405-6
Engine Model	Cummins NTO-6-B	Cummins NTC-743-C	NTA855	KT1150	SAA6D140E-3	SAA6D140E-3
Gross Power	230 hp	280 hp	405 hp	438 hp	508 hp	508 hp
Displacement	743 cu in	743 cu in	855 cu in	1,150 cu in	929.4 cu in	929.4 cu in

Operational
Specification	HD180-4	HD200-2	HD320-3	HD325-3	HD325-6	HD405-6
Tire Size	front 14.00-25-20PR, rear 16.00-25-24PR	16.00-25-24PR	18.00-25-32	18.00-33-28	18.00R33	18.00R33

Transmission and speeds
Specification	HD180-4	HD200-2	HD320-3	HD325-3	HD325-6	HD405-6
Transmission Type	constant mesh	TCS-41-6C Torque Converter and TORQFLOW	Komatsu TORQFLOW planetary gear	planetary gear	full-automatic	Full-automatic, planetary type
Number Of Gears - Forward	7	6	6	6	7	7
Number Of Gears - Reverse	1	1	1	1	1	1
Max Speed	32.4 mph	31.1 mph	38.6 mph	38.6 mph	43.2 mph	43.5 mph

Weights
Specification	HD180-4	HD200-2	HD320-3	HD325-3	HD325-6	HD405-6
Empty Weight	37,016 lb	40,786 lb	56,769 lb	58,643 lb	68,961 lb	75,134 lb
Loaded Weight	76,941 lb	84,999 lb	127,317 lb	129,191 lb	149,429 lb	163,484 lb
Weight Distribution Front - Empty	42.1 %	47.6 %	48 %	48 %	48 %	48 %
Weight Distribution Rear - Empty	57.9 %	52.4 %	52 %	52 %	52 %	52 %
Weight Distribution Front - Loaded	25 %	30.1 %	32 %	32 %	32 %	32 %
Weight Distribution Rear - Loaded	75 %	69.9 %	68 %	68 %	68 %	68 %

More in Komatsu: HD465-2–HD605-7, 960E-1, HD325-7–HD1500-7.

Komatsu HD180-4 to HD405-6 specifications

HD180-4 to HD405-6: forum references

Sources for this page

Komatsu HD180-4 to HD405-6: Configuration records