Machine models

Komatsu D51PX-22 to D61PX-23 specifications

Entries in this reference
Listing-entry count
5

Short answer

Komatsu D51PX-22 to D61PX-23: crawler dozers.

Selected configuration figures
Configuration	Documented field and quantity
D51PX-22	Gross Power 133 hp Operating Weight 28,881 lb
D61EX-15	Gross Power 170 hp Operating Weight 36,840 lb
D61EX-15E0	Gross Power 170 hp Operating Weight 36,839 lb
D61PX-15EO	Gross Power 170 hp Operating Weight 41,249 lb
D61PX-23	Gross Power 170 hp Operating Weight 41,138 lb

D51PX-22 to D61PX-23 specification matrix — Listing labels reported by the source
Publisher name	Source guide	Listing-entry count	Labels named by the source
Komatsu	D51PX-22 to D61PX-23	5	D51PX-22, D61EX-15, D61EX-15E0, D61PX-15EO, and D61PX-23

Dimensions and weight
Specification	D51PX-22	D61EX-15	D61PX-15EO
Length W/ Blade	15.75 ft	16.51 ft	16.51 ft

Specification	D51PX-22	D61EX-15E0	D61PX-15EO	D61PX-23
Width Over Tracks	8.5 ft	10.75 ft	12.67 ft	12.67 ft

Specification	D51PX-22	D61EX-15	D61EX-15E0	D61PX-15EO	D61PX-23
Height To Top Of Cab	9.85 ft	10.33 ft	10.34 ft	10.34 ft	10.44 ft
Ground Clearance	1.28 ft	1.33 ft	1.3 ft	1.3 ft	1.28 ft

Specification	D51PX-22	D61EX-15	D61EX-15E0	D61PX-15EO
Length Of Track On Ground	8.98 ft	16.5 ft	16.51 ft	10.41 ft

Specification	D61PX-23
Length W/O Blade	17.98 ft
Wheelbase	10.39 ft

Undercarriage
Specification	D51PX-22	D61EX-15	D61EX-15E0	D61PX-15EO	D61PX-23
Track Gauge	6.17 ft	6.24 ft	6.24 ft	10.41 ft	6.99 ft
Number Of Shoes Per Side	44	40	40	46	46
Ground Pressure	4.78 psi	7.68 psi	7.68 psi	4.83 psi	4.87 psi
Ground Contact Area	6,042 in2	4,836 in2	4,836 in2	8,451 in2	8,451 in2
Number Of Track Rollers Per Side	7	7	7	8	8

Specification	D51PX-22	D61EX-15E0	D61PX-15EO	D61PX-23
Standard Shoe Size	28 in	23.63 in	33.86 in	33.86 in

Specification	D61PX-15EO
Number Of Carrier Rollers Per Side	2

Engine
Specification	D51PX-22	D61EX-15	D61EX-15E0	D61PX-15EO	D61PX-23
Number Of Cylinders	6	6	6	6	6
Engine Model	SAA6D107E-1	SAA6D107E-1	SAA6D107E-1	SAA6D107E-1	SAA6D107E-2
Gross Power	133 hp	170 hp	170 hp	170 hp	170 hp
Net Power	130 hp	168 hp	168 hp	168 hp	168 hp
Displacement	408 cu in	408 cu in	408 cu in	408 cu in	408 cu in

Specification	D51PX-22	D61EX-15E0	D61PX-15EO	D61PX-23
Power Measured @	2,200 rpm	1,850 rpm	1,850 rpm	2,200 rpm

Specification	D51PX-22	D61EX-15	D61EX-15E0	D61PX-23
Aspiration	turbocharged, air-to-air aftercooled	Turbocharged, air-to-air aftercooled	Turbocharged	Turbocharged

Specification	D61EX-15E0	D61PX-15EO	D61PX-23
Engine Make	Komatsu	Komatsu	Komatsu

Operational
Specification	D51PX-22	D61EX-15	D61EX-15E0	D61PX-15EO	D61PX-23
Operating Weight	28,881 lb	36,840 lb	36,839 lb	41,249 lb	41,138 lb
Fuel Capacity	71.3 gal	103 gal	103.1 gal	103.1 gal	98.3 gal
Cooling System Fluid Capacity	9.3 gal	8.5 gal	8.5 gal	8.5 gal	11.9 gal
Engine Oil Capacity	5.3 gal	7.7 gal	7.7 gal	7.7 gal	7.2 gal
Final Drives Fluid Capacity	1.1 gal	7.5 gal	7.6 gal	7.6 gal	2.2 gal

Specification	D51PX-22	D61PX-23
Hydraulic Fluid Capacity	16.6 gal	26.7 gal

Specification	D51PX-22
Operating Voltage	24 V
Alternator Supplied Amperage	60 amps

Transmission and speeds
Specification	D51PX-22	D61EX-15
Transmission Type	Dual-path hydrostatic transmission	planetary gear, multiple-disc clutch transmission

Specification	D51PX-22	D61EX-15	D61EX-15E0	D61PX-15EO	D61PX-23
Number Of Forward Gears	3	3	3	3	3
Number Of Reverse Gears	3	3	3	3	3
Max Speed - Forward	5.6 mph	5.4 mph	5.4 mph	5.4 mph	5.6 mph
Max Speed - Reverse	5.6 mph	6.8 mph	6.8 mph	6.8 mph	5.6 mph

Hydraulic System
Specification	D51PX-22	D61EX-15	D61PX-23
Pump Type	piston type hydraulic pump	Double-acting, piston	Piston-type

Specification	D51PX-22	D61PX-15EO	D61PX-23
Relief Valve Pressure	3,983 psi	2,990 psi	3,974 psi

Specification	D51PX-22	D61EX-15	D61PX-15EO	D61PX-23
Pump Flow Capacity	26.2 gpm	51.5 gpm	51.6 gpm	45.2 gpm

Standard Blade
Specification	D51PX-22	D61EX-15
Blade width	11 ft	10.7 ft
Blade height	43.8 in	392 in

Specification	D51PX-22
Capacity	3.8 yd3
Blade Angle (Both Directions)	28.5 degrees
Cutting Depth	18 in

Variants — Source comparison annotation
Source guide	Differing-field count reported
D51PX-22 to D61PX-23	39

Ratios
Figure	D51PX-22	D61EX-15	D61EX-15E0	D61PX-15EO	D61PX-23
Engine horsepower per 1,000 lb of weight	4.5	4.6	4.6	4.1	4.1
Fuel tank per engine horsepower	0.55 gal	0.61 gal	0.61 gal	0.61 gal	0.59 gal

Figure	D51PX-22	D61EX-15	D61PX-15EO	D61PX-23
Pump flow per engine horsepower	0.20 gpm	0.31 gpm	0.31 gpm	0.27 gpm

D51PX-22 to D61PX-23: owner reports

Sources: 3 forum discussions about the Komatsu D61 dozers (D61-23, D61PX-12, D61PX-15); heavyequipmentforums.com.

Komatsu: Fault code, overheating and low transmission pressure.

D51PX-22 to D61PX-23: forum references — Forum-title search
Forum index	Equipment class queried	Names in the search	Matching titles
Heavy Equipment Forums	crawler dozer	Komatsu and the D61EX, D61PX line that the D51PX-22, D61EX-15, D61EX-15E0, D61PX-15EO belongs to (no title names the exact model)	32

Topics named by those titles
Title topic	Titles
transmission and drive	5
hydraulics	4
electrical and sensors	2

Topic in the title	Threads	Share of matching threads
transmission and drive	5	16%
hydraulics	4	13%
electrical and sensors	2	6%
starting and cranking	2	6%

Komatsu D61 Ex 12 (Heavy Equipment Forums, 2026-07-20)
Komatsu D61px 24 HST Pump Failure (Heavy Equipment Forums, 2025-09-28)
Komatsu D51px 22 Tracking Problems (Heavy Equipment Forums, 2025-05-06)
Komatsu D51px22 (Heavy Equipment Forums, 2024-10-09)

Used market for the D51PX-22 to D61PX-23 — Dated first-page listing snapshot
Observation date	Listing source	Equipment search	Listings
2026-09-24	MachineryTrader	Komatsu crawler dozer	43

Model	Listed	Model years	Lowest asking	Highest asking	Median asking	Median hours
D51PX-22	18	2007 to 2015	$52,378	$112,500	$74,582	6,425
D61EX-15	4	2006 to 2009	$45,546	$146,000	$99,920	3,040
D61EX-15E0	3	2010 to 2012	$53,000	$62,000	$57,500	9,349
D61PX-23	18	2013 to 2017	$79,000	$137,222	$89,500	4,349

D51PX-22 to D61PX-23: 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 crawler dozer D51PX-22, D61EX-15, D61EX-15E0, D61PX-15EO	No matching recall in this search

Sources for this page
Evidence class	Document, classification and recorded date
Reference site	Reference site: Komatsu D51PX-22 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D61EX-15 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D61EX-15E0 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D61PX-15EO — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D61PX-23 — RitchieSpecs. Observed 2026-09-24.
Forum threads	Forum threads: Heavy Equipment Forums thread index for Komatsu D51PX-22 to D61PX-23 — Heavy Equipment Forums. Observed 2026-09-24.
Forum threads	Forum threads: Forum threads read for the Komatsu D61 dozers (D61-23, D61PX-12, D61PX-15) — Heavyequipmentforums. Observed 2026-09-24.
Used-market listings	Used-market listings: MachineryTrader listings for Komatsu D51PX-22 — 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 D51PX-22 to D61PX-23: Configuration records

D51PX-22

Specification	Source figure
Dimensions and weight
Length W/ Blade	15.75 ft
Width Over Tracks	8.5 ft
Height To Top Of Cab	9.85 ft
Length Of Track On Ground	8.98 ft
Ground Clearance	1.28 ft
Undercarriage
Track Gauge	6.17 ft
Standard Shoe Size	28 in
Number Of Shoes Per Side	44
Ground Pressure	4.78 psi
Number Of Track Rollers Per Side	7
Ground Contact Area	6,042 in2
Engine
Number Of Cylinders	6
Engine Model	SAA6D107E-1
Gross Power	133 hp
Power Measured @	2,200 rpm
Displacement	408 cu in
Aspiration	turbocharged, air-to-air aftercooled
Net Power	130 hp
Operational
Operating Weight	28,881 lb
Fuel Capacity	71.3 gal
Cooling System Fluid Capacity	9.3 gal
Engine Oil Capacity	5.3 gal
Hydraulic Fluid Capacity	16.6 gal
Final Drives Fluid Capacity	1.1 gal
Operating Voltage	24 V
Alternator Supplied Amperage	60 amps
Transmission and speeds
Transmission Type	Dual-path hydrostatic transmission
Number Of Forward Gears	3
Number Of Reverse Gears	3
Max Speed - Forward	5.6 mph
Max Speed - Reverse	5.6 mph
Standard Blade
Blade width	11 ft
Blade height	43.8 in
Capacity	3.8 yd3
Cutting Depth	18 in
Blade Angle (Both Directions)	28.5 degrees
Hydraulic System
Pump Type	piston type hydraulic pump
Relief Valve Pressure	3,983 psi
Pump Flow Capacity	26.2 gpm

Source

D61EX-15

Specification	Source figure
Dimensions and weight
Length W/ Blade	16.51 ft
Height To Top Of Cab	10.33 ft
Length Of Track On Ground	16.5 ft
Ground Clearance	1.33 ft
Undercarriage
Track Gauge	6.24 ft
Number Of Shoes Per Side	40
Ground Pressure	7.68 psi
Number Of Track Rollers Per Side	7
Ground Contact Area	4,836 in2
Engine
Number Of Cylinders	6
Engine Model	SAA6D107E-1
Gross Power	170 hp
Displacement	408 cu in
Aspiration	Turbocharged, air-to-air aftercooled
Net Power	168 hp
Operational
Operating Weight	36,840 lb
Fuel Capacity	103 gal
Cooling System Fluid Capacity	8.5 gal
Engine Oil Capacity	7.7 gal
Final Drives Fluid Capacity	7.5 gal
Transmission and speeds
Transmission Type	planetary gear, multiple-disc clutch transmission
Number Of Forward Gears	3
Number Of Reverse Gears	3
Max Speed - Forward	5.4 mph
Max Speed - Reverse	6.8 mph
Standard Blade
Blade width	10.7 ft
Blade height	392 in
Hydraulic System
Pump Type	Double-acting, piston
Pump Flow Capacity	51.5 gpm

Source

D61EX-15E0

Specification	Source figure
Dimensions and weight
Width Over Tracks	10.75 ft
Height To Top Of Cab	10.34 ft
Length Of Track On Ground	16.51 ft
Ground Clearance	1.3 ft
Undercarriage
Track Gauge	6.24 ft
Standard Shoe Size	23.63 in
Number Of Shoes Per Side	40
Ground Pressure	7.68 psi
Number Of Track Rollers Per Side	7
Ground Contact Area	4,836 in2
Engine
Number Of Cylinders	6
Engine Model	SAA6D107E-1
Gross Power	170 hp
Power Measured @	1,850 rpm
Displacement	408 cu in
Aspiration	Turbocharged
Net Power	168 hp
Engine Make	Komatsu
Operational
Operating Weight	36,839 lb
Fuel Capacity	103.1 gal
Cooling System Fluid Capacity	8.5 gal
Engine Oil Capacity	7.7 gal
Final Drives Fluid Capacity	7.6 gal
Transmission and speeds
Number Of Forward Gears	3
Number Of Reverse Gears	3
Max Speed - Forward	5.4 mph
Max Speed - Reverse	6.8 mph

Source

D61PX-15EO

Specification	Source figure
Dimensions and weight
Length W/ Blade	16.51 ft
Width Over Tracks	12.67 ft
Height To Top Of Cab	10.34 ft
Length Of Track On Ground	10.41 ft
Ground Clearance	1.3 ft
Undercarriage
Track Gauge	10.41 ft
Standard Shoe Size	33.86 in
Number Of Shoes Per Side	46
Number Of Carrier Rollers Per Side	2
Ground Pressure	4.83 psi
Number Of Track Rollers Per Side	8
Ground Contact Area	8,451 in2
Engine
Number Of Cylinders	6
Engine Model	SAA6D107E-1
Gross Power	170 hp
Power Measured @	1,850 rpm
Displacement	408 cu in
Net Power	168 hp
Engine Make	Komatsu
Operational
Operating Weight	41,249 lb
Fuel Capacity	103.1 gal
Cooling System Fluid Capacity	8.5 gal
Engine Oil Capacity	7.7 gal
Final Drives Fluid Capacity	7.6 gal
Transmission and speeds
Number Of Forward Gears	3
Number Of Reverse Gears	3
Max Speed - Forward	5.4 mph
Max Speed - Reverse	6.8 mph
Hydraulic System
Relief Valve Pressure	2,990 psi
Pump Flow Capacity	51.6 gpm

Source

D61PX-23

Specification	Source figure
Dimensions and weight
Width Over Tracks	12.67 ft
Height To Top Of Cab	10.44 ft
Ground Clearance	1.28 ft
Length W/O Blade	17.98 ft
Wheelbase	10.39 ft
Undercarriage
Track Gauge	6.99 ft
Standard Shoe Size	33.86 in
Number Of Shoes Per Side	46
Ground Pressure	4.87 psi
Number Of Track Rollers Per Side	8
Ground Contact Area	8,451 in2
Engine
Number Of Cylinders	6
Engine Model	SAA6D107E-2
Gross Power	170 hp
Power Measured @	2,200 rpm
Displacement	408 cu in
Aspiration	Turbocharged
Net Power	168 hp
Engine Make	Komatsu
Operational
Operating Weight	41,138 lb
Fuel Capacity	98.3 gal
Cooling System Fluid Capacity	11.9 gal
Engine Oil Capacity	7.2 gal
Hydraulic Fluid Capacity	26.7 gal
Final Drives Fluid Capacity	2.2 gal
Transmission and speeds
Number Of Forward Gears	3
Number Of Reverse Gears	3
Max Speed - Forward	5.6 mph
Max Speed - Reverse	5.6 mph
Hydraulic System
Pump Type	Piston-type
Relief Valve Pressure	3,974 psi
Pump Flow Capacity	45.2 gpm

Source

Compare Komatsu D51PX-22, D61EX-15, D61EX-15E0, D61PX-15EO, D61PX-23

Dimensions and weight
Specification	D51PX-22	D61EX-15	D61EX-15E0	D61PX-15EO	D61PX-23
Height To Top Of Cab	9.85 ft	10.33 ft	10.34 ft	10.34 ft	10.44 ft
Ground Clearance	1.28 ft	1.33 ft	1.3 ft	1.3 ft	1.28 ft

Undercarriage
Specification	D51PX-22	D61EX-15	D61EX-15E0	D61PX-15EO	D61PX-23
Track Gauge	6.17 ft	6.24 ft	6.24 ft	10.41 ft	6.99 ft
Number Of Shoes Per Side	44	40	40	46	46
Ground Pressure	4.78 psi	7.68 psi	7.68 psi	4.83 psi	4.87 psi
Ground Contact Area	6,042 in2	4,836 in2	4,836 in2	8,451 in2	8,451 in2
Number Of Track Rollers Per Side	7	7	7	8	8

Engine
Specification	D51PX-22	D61EX-15	D61EX-15E0	D61PX-15EO	D61PX-23
Number Of Cylinders	6	6	6	6	6
Engine Model	SAA6D107E-1	SAA6D107E-1	SAA6D107E-1	SAA6D107E-1	SAA6D107E-2
Gross Power	133 hp	170 hp	170 hp	170 hp	170 hp
Net Power	130 hp	168 hp	168 hp	168 hp	168 hp
Displacement	408 cu in	408 cu in	408 cu in	408 cu in	408 cu in

Operational
Specification	D51PX-22	D61EX-15	D61EX-15E0	D61PX-15EO	D61PX-23
Operating Weight	28,881 lb	36,840 lb	36,839 lb	41,249 lb	41,138 lb
Fuel Capacity	71.3 gal	103 gal	103.1 gal	103.1 gal	98.3 gal
Cooling System Fluid Capacity	9.3 gal	8.5 gal	8.5 gal	8.5 gal	11.9 gal
Engine Oil Capacity	5.3 gal	7.7 gal	7.7 gal	7.7 gal	7.2 gal
Final Drives Fluid Capacity	1.1 gal	7.5 gal	7.6 gal	7.6 gal	2.2 gal

Transmission and speeds
Specification	D51PX-22	D61EX-15	D61EX-15E0	D61PX-15EO	D61PX-23
Number Of Forward Gears	3	3	3	3	3
Number Of Reverse Gears	3	3	3	3	3
Max Speed - Forward	5.6 mph	5.4 mph	5.4 mph	5.4 mph	5.6 mph
Max Speed - Reverse	5.6 mph	6.8 mph	6.8 mph	6.8 mph	5.6 mph

More in Komatsu: D60A-6–D65A-7, D50P-16–D53P-18E, D60/D65: dozer/crawler-loader differences.

Komatsu D51PX-22 to D61PX-23 specifications

D51PX-22 to D61PX-23: owner reports

Sources for this page

Komatsu D51PX-22 to D61PX-23: Configuration records