Machine models

Komatsu D20A-3 to D21A-5 specifications

Entries in this reference
Listing-entry count
12

Short answer

Komatsu D20A-3 to D21A-5: crawler dozers.

Selected configuration figures
Configuration	Documented field and quantity
D20A-3	Gross Power 35 hp Operating Weight 7,341 lb
D20A-5	Gross Power 39 hp Operating Weight 7,849 lb
D20A-6	Gross Power 40 hp Operating Weight 7,827 lb
D20A-7	Gross Power 40 hp Operating Weight 7,827 lb
D20A-7E	Gross Power 40 hp Operating Weight 8,003 lb
D20P-3	Gross Power 35 hp Operating Weight 7,937 lb
D20P-5	Gross Power 39 hp Operating Weight 8,334 lb
D20P-5a	Gross Power 39 hp Operating Weight 8,620 lb
D20P-6	Gross Power 40 hp Operating Weight 8,466 lb
D20PL-5	Gross Power 39 hp Operating Weight 8,554 lb
D21A-3	Gross Power 37 hp Operating Weight 7,562 lb
D21A-5	Gross Power 39 hp Operating Weight 7,981 lb

D20A-3 to D21A-5 specification matrix — Listing labels reported by the source
Publisher name	Source guide	Listing-entry count	Labels named by the source
Komatsu	D20A-3 to D21A-5	12	D20A-3, D20A-5, D20A-6, D20A-7, D20A-7E, D20P-3, and 6 more

Dimensions and weight
Specification	D20A-3	D20A-5	D20A-6	D20A-7	D20A-7E	D20P-3	D20P-5	D20P-5a	D20P-6	D20PL-5	D21A-3	D21A-5
Length W/ Blade	11.32 ft	11.32 ft	11.16 ft	11.16 ft	11.16 ft	10.62 ft	10.54 ft	11.11 ft	10.9 ft	10.98 ft	11.32 ft	11.11 ft
Width Over Tracks	5.06 ft	5.29 ft	5.29 ft	5.29 ft	5.29 ft	6.01 ft	5.98 ft	6.57 ft	5.98 ft	7.19 ft	5.06 ft	5.29 ft
Height To Top Of Cab	6.85 ft	7.09 ft	8.13 ft	8.13 ft	8.13 ft	6.93 ft	7.17 ft	7.16 ft	8.21 ft	7.12 ft	6.85 ft	7.09 ft
Length Of Track On Ground	5.5 ft	5.53 ft	5.53 ft	5.53 ft	5.53 ft	5.5 ft	5.53 ft	5.53 ft	5.55 ft	5.98 ft	5.5 ft	5.53 ft
Ground Clearance	1.02 ft	1.02 ft	0.97 ft	0.97 ft	0.97 ft	1.24 ft	1.24 ft	1.24 ft	1.19 ft	1.19 ft	1.02 ft	1.02 ft

Specification	D20A-3	D20A-5	D20A-6	D20A-7	D20A-7E	D20P-3	D20P-5	D20P-6	D20PL-5	D21A-3	D21A-5
Length W/O Blade	8.09 ft	8.09 ft	8.37 ft	8.4 ft	8.4 ft	8.17 ft	8.11 ft	8.37 ft	8.5 ft	8.09 ft	8.01 ft

Undercarriage
Specification	D20A-3	D20A-5	D20A-6	D20A-7	D20A-7E	D20P-3	D20P-5	D20P-5a	D20P-6	D20PL-5	D21A-3	D21A-5
Track Gauge	3.91 ft	4.3 ft	4.3 ft	4.3 ft	4.3 ft	4.34 ft	4.3 ft	4.89 ft	4.3 ft	4.89 ft	3.91 ft	4.3 ft
Standard Shoe Size	11.82 in	11.82 in	11.82 in	11.82 in	11.82 in	20.08 in	20.08 in	20.08 in	20.08 in	27.56 in	11.82 in	11.82 in
Track Pitch	5.32 in	5.32 in	5.32 in	5.32 in	135 in	5.32 in	5.32 in	5.32 in	5.32 in	5.32 in	5.32 in	5.32 in

Specification	D20A-3	D20A-5	D20A-6	D20P-3	D20P-5	D20P-5a	D20PL-5	D21A-3	D21A-5
Number Of Track Rollers Per Side	5	5	5	5	5	5	6	5	5

Specification	D20A-3	D20A-5	D20A-6	D20A-7	D20A-7E	D20P-3	D20P-5	D20P-5a	D20PL-5	D21A-3	D21A-5
Number Of Shoes Per Side	37	37	37	5	5	37	37	37	39	37	37

Specification	D20A-3	D20A-5	D20P-3	D20P-5	D21A-3	D21A-5
Ground Pressure	4 psi	4.12 psi	2.56 psi	2.7 psi	4.12 psi	4.27 psi

Engine
Specification	D20A-3	D20A-5	D20A-6	D20A-7	D20A-7E	D20P-3	D20P-5	D20P-5a	D20P-6	D20PL-5	D21A-3	D21A-5
Number Of Cylinders	4	4	4	4	4	4	4	4	4	4	4	4
Engine Model	4D95-1A	4D94-2N	4D95S	4D95S	4D94E	4D92-1A	4D92-2N	4D92-2N	4D95S-W1	4D94-2N	4D92-1	4D92-2P
Gross Power	35 hp	39 hp	40 hp	40 hp	40 hp	35 hp	39 hp	39 hp	40 hp	39 hp	37 hp	39 hp
Power Measured @	2,450 rpm	2,450 rpm	2,450 rpm	2,450 rpm	2,450 rpm	2,450 rpm	2,450 rpm	2,450 rpm	2,450 rpm	2,450 rpm	2,450 rpm	2,450 rpm
Displacement	158.7 cu in	179.5 cu in	164.2 cu in	164.2 cu in	169.4 cu in	158.7 cu in	179.5 cu in	179.5 cu in	164.2 cu in	179.5 cu in	159 cu in	179.5 cu in

Specification	D20A-5	D21A-5
Max Torque	108.5 lb-ft	108.5 lb-ft

Operational
Specification	D20A-3	D20A-5	D20A-6	D20A-7	D20A-7E	D20P-3	D20P-5	D20P-5a	D20P-6	D20PL-5	D21A-3	D21A-5
Operating Weight	7,341 lb	7,849 lb	7,827 lb	7,827 lb	8,003 lb	7,937 lb	8,334 lb	8,620 lb	8,466 lb	8,554 lb	7,562 lb	7,981 lb

Specification	D20A-3	D20A-5	D21A-3	D21A-5
Fuel Capacity	15.9 gal	15.9 gal	15.9 gal	15.9 gal
Cooling System Fluid Capacity	3.7 gal	3.5 gal	3.7 gal	3.5 gal

Transmission and speeds
Specification	D20A-3	D20A-5	D20A-6	D20A-7	D20A-7E	D20P-3	D20P-5	D20P-5a	D20P-6	D20PL-5	D21A-3	D21A-5
Transmission Type	DD	DD	DD	DD	DD	DD	DD	DD	DD	DD	HS	HS
Number Of Forward Gears	3	3	3	3	3	3	3	3	3	3	3	2
Number Of Reverse Gears	2	2	2	2	2	2	2	2	2	2	3	2

Specification	D20A-3	D20A-5	D21A-3	D21A-5
Max Speed - Forward	4.6 mph	4.6 mph	4.3 mph	2.8 mph
Max Speed - Reverse	4.1 mph	4.1 mph	4 mph	3.4 mph

Standard Blade
Specification	D20A-3	D20A-5	D20A-6	D20A-7	D20A-7E	D20P-3	D20P-5	D20P-5a	D20P-6	D20PL-5	D21A-3	D21A-5
Blade width	7.6 ft	7.2 ft	7.2 ft	7.2 ft	7.2 ft	7.2 ft	7.2 ft	8.4 ft	7.2 ft	8.3 ft	7.6 ft	7.2 ft
Blade height	22.3 in	23.3 in	23.3 in	23.3 in	23.3 in	23.1 in	23.3 in	23.3 in	23.3 in	23.3 in	22.3 in	23.3 in

Specification	D20A-3	D20A-5	D20P-3	D20P-5	D21A-3	D21A-5
Capacity	1 yd3	1 yd3	1 yd3	1.2 yd3	1 yd3	1 yd3
Cutting Depth	12.6 in	13.8 in	10.9 in	12.6 in	12.6 in	13.8 in

Hydraulic System
Specification	D20A-5	D21A-5
Relief Valve Pressure	2,205 psi	2,205 psi
Pump Flow Capacity	14.1 gpm	14.1 gpm

Variants — Source comparison annotation
Source guide	Differing-field count reported
D20A-3 to D21A-5	30

Ratios
Figure	D20A-3	D20A-5	D20A-6	D20A-7	D20A-7E	D20P-3	D20P-5	D20P-5a	D20P-6	D20PL-5	D21A-3	D21A-5
Engine horsepower per 1,000 lb of weight	4.8	5.0	5.1	5.1	5.0	4.4	4.7	4.5	4.7	4.6	4.9	4.9

Figure	D20A-5	D21A-5
Pump flow per engine horsepower	0.36 gpm	0.36 gpm

Figure	D20A-3	D20A-5	D21A-3	D21A-5
Fuel tank per engine horsepower	0.45 gal	0.41 gal	0.43 gal	0.41 gal

Reference directory classification
Equipment group	crawler dozer

D20A-3 to D21A-5: owner reports

Sources: 3 forum discussions about the Komatsu D20 dozers and D20S track loader; heavyequipmentforums.com.

Frozen pedals, an injection line leak and a clutch that will not disengage. A D20P-6 with frozen clutch, brake and steering controls (a reply asked whether the linkages were rusted or packed with debris), a D20P-5 that had sat since about 2007 and leaked oil at the injection line after starting, and a D20S whose main clutch would not disengage. Threads read: 1, 2, 3.

Sources: 3 forum discussions about the Komatsu D21 dozers (D21P-6); heavyequipmentforums.com.

Komatsu: Steering clutches and unexplained warning lights.

D20A-3 to D21A-5: forum references — Forum-title search
Forum index	Equipment class queried	Names in the search	Matching titles
TractorByNet and Heavy Equipment Forums	crawler dozer	Komatsu and the D20A, D20P line that the D20A-3, D20A-5, D20A-6, D20A-7 belongs to (no title names the exact model)	129

Topics named by those titles
Title topic	Titles
transmission and drive	24
brakes and steering	21
hydraulics	13

Topic in the title	Threads	Share of matching threads
transmission and drive	24	19%
brakes and steering	21	16%
hydraulics	13	10%
tracks and undercarriage	7	5%
parts and manuals	3	2%

Komatsu D20a 5 (TractorByNet, 2026-06-26)
D20p 6 Komatsu (Heavy Equipment Forums, 2026-01-08)
I Have A Komatsu D20 P 6 With Problems (Heavy Equipment Forums, 2025-08-11)
Komatsu D20p 5 Injection Oil Line Leak (Heavy Equipment Forums, 2025-06-09)

Used market for the D20A-3 to D21A-5 — Dated first-page listing snapshot
Observation date	Listing source	Equipment search	Listings
2026-09-24	MachineryTrader	Komatsu crawler dozer	1

Model	Listed	Model years	Lowest asking	Highest asking	Median asking	Median hours
D20A-6	1	1990	$24,500	$24,500	$24,500	None shown

D20A-3 to D21A-5: 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 D20A-3, D20A-5, D20A-6, D20A-7	No matching recall in this search

Sources for this page
Evidence class	Document, classification and recorded date
Reference site	Reference site: Komatsu D20A-3 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D20A-5 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D20A-6 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D20A-7 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D20A-7E — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D20P-3 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D20P-5 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D20P-5a — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D20P-6 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D20PL-5 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D21A-3 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D21A-5 — RitchieSpecs. Observed 2026-09-24.
Forum threads	Forum threads: TractorByNet thread index for Komatsu D20A-3 to D21A-5 — TractorByNet. Observed 2026-09-24.
Forum threads	Forum threads: Heavy Equipment Forums thread index for Komatsu D20A-3 to D21A-5 — Heavy Equipment Forums. Observed 2026-09-24.
Forum threads	Forum threads: Forum threads read for the Komatsu D20 dozers and D20S track loader — Heavyequipmentforums. Observed 2026-09-24.
Used-market listings	Used-market listings: MachineryTrader listings for Komatsu D20A-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 D20A-3 to D21A-5: Configuration records

D20A-3

Specification	Source figure
Dimensions and weight
Ground Clearance	1.02 ft
Height To Top Of Cab	6.85 ft
Length W/ Blade	11.32 ft
Width Over Tracks	5.06 ft
Length W/O Blade	8.09 ft
Undercarriage
Track Gauge	3.91 ft
Ground Pressure	4 psi
Number Of Track Rollers Per Side	5
Standard Shoe Size	11.82 in
Number Of Shoes Per Side	37
Track Pitch	5.32 in
Engine
Engine Model	4D95-1A
Displacement	158.7 cu in
Number Of Cylinders	4
Gross Power	35 hp
Power Measured @	2,450 rpm
Operational
Operating Weight	7,341 lb
Fuel Capacity	15.9 gal
Cooling System Fluid Capacity	3.7 gal
Transmission and speeds
Transmission Type	DD
Number Of Forward Gears	3
Number Of Reverse Gears	2
Max Speed - Forward	4.6 mph
Max Speed - Reverse	4.1 mph
Standard Blade
Blade width	7.6 ft
Blade height	22.3 in
Capacity	1 yd3
Cutting Depth	12.6 in
Additional specifications
Length Of Track On Ground	5.5 ft

Source

D20A-5

Specification	Source figure
Dimensions and weight
Ground Clearance	1.02 ft
Height To Top Of Cab	7.09 ft
Length W/ Blade	11.32 ft
Width Over Tracks	5.29 ft
Length W/O Blade	8.09 ft
Undercarriage
Track Gauge	4.3 ft
Ground Pressure	4.12 psi
Number Of Track Rollers Per Side	5
Standard Shoe Size	11.82 in
Number Of Shoes Per Side	37
Track Pitch	5.32 in
Engine
Engine Model	4D94-2N
Displacement	179.5 cu in
Number Of Cylinders	4
Gross Power	39 hp
Power Measured @	2,450 rpm
Max Torque	108.5 lb-ft
Operational
Operating Weight	7,849 lb
Fuel Capacity	15.9 gal
Cooling System Fluid Capacity	3.5 gal
Transmission and speeds
Transmission Type	DD
Number Of Forward Gears	3
Number Of Reverse Gears	2
Max Speed - Forward	4.6 mph
Max Speed - Reverse	4.1 mph
Standard Blade
Blade width	7.2 ft
Blade height	23.3 in
Capacity	1 yd3
Cutting Depth	13.8 in
Hydraulic System
Relief Valve Pressure	2,205 psi
Pump Flow Capacity	14.1 gpm
Additional specifications
Length Of Track On Ground	5.53 ft

Source

D20A-6

Specification	Source figure
Dimensions and weight
Ground Clearance	0.97 ft
Height To Top Of Cab	8.13 ft
Length W/ Blade	11.16 ft
Width Over Tracks	5.29 ft
Length W/O Blade	8.37 ft
Undercarriage
Track Gauge	4.3 ft
Number Of Track Rollers Per Side	5
Standard Shoe Size	11.82 in
Number Of Shoes Per Side	37
Track Pitch	5.32 in
Engine
Engine Model	4D95S
Displacement	164.2 cu in
Number Of Cylinders	4
Gross Power	40 hp
Power Measured @	2,450 rpm
Operational
Operating Weight	7,827 lb
Transmission and speeds
Transmission Type	DD
Number Of Forward Gears	3
Number Of Reverse Gears	2
Standard Blade
Blade width	7.2 ft
Blade height	23.3 in
Additional specifications
Length Of Track On Ground	5.53 ft

Source

D20A-7

Specification	Source figure
Dimensions and weight
Ground Clearance	0.97 ft
Height To Top Of Cab	8.13 ft
Length W/ Blade	11.16 ft
Width Over Tracks	5.29 ft
Length W/O Blade	8.4 ft
Undercarriage
Track Gauge	4.3 ft
Standard Shoe Size	11.82 in
Number Of Shoes Per Side	5
Track Pitch	5.32 in
Engine
Engine Model	4D95S
Displacement	164.2 cu in
Number Of Cylinders	4
Gross Power	40 hp
Power Measured @	2,450 rpm
Operational
Operating Weight	7,827 lb
Transmission and speeds
Transmission Type	DD
Number Of Forward Gears	3
Number Of Reverse Gears	2
Standard Blade
Blade width	7.2 ft
Blade height	23.3 in
Additional specifications
Length Of Track On Ground	5.53 ft

Source

D20A-7E

Specification	Source figure
Dimensions and weight
Ground Clearance	0.97 ft
Height To Top Of Cab	8.13 ft
Length W/ Blade	11.16 ft
Width Over Tracks	5.29 ft
Length W/O Blade	8.4 ft
Undercarriage
Track Gauge	4.3 ft
Standard Shoe Size	11.82 in
Number Of Shoes Per Side	5
Track Pitch	135 in
Engine
Engine Model	4D94E
Displacement	169.4 cu in
Number Of Cylinders	4
Gross Power	40 hp
Power Measured @	2,450 rpm
Operational
Operating Weight	8,003 lb
Transmission and speeds
Transmission Type	DD
Number Of Forward Gears	3
Number Of Reverse Gears	2
Standard Blade
Blade width	7.2 ft
Blade height	23.3 in
Additional specifications
Length Of Track On Ground	5.53 ft

Source

D20P-3

Specification	Source figure
Dimensions and weight
Ground Clearance	1.24 ft
Height To Top Of Cab	6.93 ft
Length W/ Blade	10.62 ft
Width Over Tracks	6.01 ft
Length W/O Blade	8.17 ft
Undercarriage
Track Gauge	4.34 ft
Ground Pressure	2.56 psi
Number Of Track Rollers Per Side	5
Standard Shoe Size	20.08 in
Number Of Shoes Per Side	37
Track Pitch	5.32 in
Engine
Engine Model	4D92-1A
Displacement	158.7 cu in
Number Of Cylinders	4
Gross Power	35 hp
Power Measured @	2,450 rpm
Operational
Operating Weight	7,937 lb
Transmission and speeds
Transmission Type	DD
Number Of Forward Gears	3
Number Of Reverse Gears	2
Standard Blade
Blade width	7.2 ft
Blade height	23.1 in
Capacity	1 yd3
Cutting Depth	10.9 in
Additional specifications
Length Of Track On Ground	5.5 ft

Source

D20P-5

Specification	Source figure
Dimensions and weight
Ground Clearance	1.24 ft
Height To Top Of Cab	7.17 ft
Length W/ Blade	10.54 ft
Width Over Tracks	5.98 ft
Length W/O Blade	8.11 ft
Undercarriage
Track Gauge	4.3 ft
Ground Pressure	2.7 psi
Number Of Track Rollers Per Side	5
Standard Shoe Size	20.08 in
Number Of Shoes Per Side	37
Track Pitch	5.32 in
Engine
Engine Model	4D92-2N
Displacement	179.5 cu in
Number Of Cylinders	4
Gross Power	39 hp
Power Measured @	2,450 rpm
Operational
Operating Weight	8,334 lb
Transmission and speeds
Transmission Type	DD
Number Of Forward Gears	3
Number Of Reverse Gears	2
Standard Blade
Blade width	7.2 ft
Blade height	23.3 in
Capacity	1.2 yd3
Cutting Depth	12.6 in
Additional specifications
Length Of Track On Ground	5.53 ft

Source

D20P-5a

Specification	Source figure
Dimensions and weight
Ground Clearance	1.24 ft
Height To Top Of Cab	7.16 ft
Length W/ Blade	11.11 ft
Width Over Tracks	6.57 ft
Undercarriage
Track Gauge	4.89 ft
Number Of Track Rollers Per Side	5
Standard Shoe Size	20.08 in
Number Of Shoes Per Side	37
Track Pitch	5.32 in
Engine
Engine Model	4D92-2N
Displacement	179.5 cu in
Number Of Cylinders	4
Gross Power	39 hp
Power Measured @	2,450 rpm
Operational
Operating Weight	8,620 lb
Transmission and speeds
Transmission Type	DD
Number Of Forward Gears	3
Number Of Reverse Gears	2
Standard Blade
Blade width	8.4 ft
Blade height	23.3 in
Additional specifications
Length Of Track On Ground	5.53 ft

Source

D20P-6

Specification	Source figure
Dimensions and weight
Ground Clearance	1.19 ft
Height To Top Of Cab	8.21 ft
Length W/ Blade	10.9 ft
Width Over Tracks	5.98 ft
Length W/O Blade	8.37 ft
Undercarriage
Track Gauge	4.3 ft
Standard Shoe Size	20.08 in
Track Pitch	5.32 in
Engine
Engine Model	4D95S-W1
Displacement	164.2 cu in
Number Of Cylinders	4
Gross Power	40 hp
Power Measured @	2,450 rpm
Operational
Operating Weight	8,466 lb
Transmission and speeds
Transmission Type	DD
Number Of Forward Gears	3
Number Of Reverse Gears	2
Standard Blade
Blade width	7.2 ft
Blade height	23.3 in
Additional specifications
Length Of Track On Ground	5.55 ft

Source

D20PL-5

Specification	Source figure
Dimensions and weight
Ground Clearance	1.19 ft
Height To Top Of Cab	7.12 ft
Length W/ Blade	10.98 ft
Width Over Tracks	7.19 ft
Length W/O Blade	8.5 ft
Undercarriage
Track Gauge	4.89 ft
Number Of Track Rollers Per Side	6
Standard Shoe Size	27.56 in
Number Of Shoes Per Side	39
Track Pitch	5.32 in
Engine
Engine Model	4D94-2N
Displacement	179.5 cu in
Number Of Cylinders	4
Gross Power	39 hp
Power Measured @	2,450 rpm
Operational
Operating Weight	8,554 lb
Transmission and speeds
Transmission Type	DD
Number Of Forward Gears	3
Number Of Reverse Gears	2
Standard Blade
Blade width	8.3 ft
Blade height	23.3 in
Additional specifications
Length Of Track On Ground	5.98 ft

Source

D21A-3

Specification	Source figure
Dimensions and weight
Ground Clearance	1.02 ft
Height To Top Of Cab	6.85 ft
Length W/ Blade	11.32 ft
Width Over Tracks	5.06 ft
Length W/O Blade	8.09 ft
Undercarriage
Track Gauge	3.91 ft
Ground Pressure	4.12 psi
Number Of Track Rollers Per Side	5
Standard Shoe Size	11.82 in
Number Of Shoes Per Side	37
Track Pitch	5.32 in
Engine
Engine Model	4D92-1
Displacement	159 cu in
Number Of Cylinders	4
Gross Power	37 hp
Power Measured @	2,450 rpm
Operational
Operating Weight	7,562 lb
Fuel Capacity	15.9 gal
Cooling System Fluid Capacity	3.7 gal
Transmission and speeds
Transmission Type	HS
Number Of Forward Gears	3
Number Of Reverse Gears	3
Max Speed - Forward	4.3 mph
Max Speed - Reverse	4 mph
Standard Blade
Blade width	7.6 ft
Blade height	22.3 in
Capacity	1 yd3
Cutting Depth	12.6 in
Additional specifications
Length Of Track On Ground	5.5 ft

Source

D21A-5

Specification	Source figure
Dimensions and weight
Ground Clearance	1.02 ft
Height To Top Of Cab	7.09 ft
Length W/ Blade	11.11 ft
Width Over Tracks	5.29 ft
Length W/O Blade	8.01 ft
Undercarriage
Track Gauge	4.3 ft
Ground Pressure	4.27 psi
Number Of Track Rollers Per Side	5
Standard Shoe Size	11.82 in
Number Of Shoes Per Side	37
Track Pitch	5.32 in
Engine
Engine Model	4D92-2P
Displacement	179.5 cu in
Number Of Cylinders	4
Gross Power	39 hp
Power Measured @	2,450 rpm
Max Torque	108.5 lb-ft
Operational
Operating Weight	7,981 lb
Fuel Capacity	15.9 gal
Cooling System Fluid Capacity	3.5 gal
Transmission and speeds
Transmission Type	HS
Number Of Forward Gears	2
Number Of Reverse Gears	2
Max Speed - Forward	2.8 mph
Max Speed - Reverse	3.4 mph
Standard Blade
Blade width	7.2 ft
Blade height	23.3 in
Capacity	1 yd3
Cutting Depth	13.8 in
Hydraulic System
Relief Valve Pressure	2,205 psi
Pump Flow Capacity	14.1 gpm
Additional specifications
Length Of Track On Ground	5.53 ft

Source

Compare Komatsu D20A-3, D20A-5, D20A-6, D20A-7, D20A-7E, D20P-3, D20P-5, D20P-5a, D20P-6, D20PL-5, D21A-3, D21A-5

Dimensions and weight
Specification	D20A-3	D20A-5	D20A-6	D20A-7	D20A-7E	D20P-3	D20P-5	D20P-5a	D20P-6	D20PL-5	D21A-3	D21A-5
Length W/ Blade	11.32 ft	11.32 ft	11.16 ft	11.16 ft	11.16 ft	10.62 ft	10.54 ft	11.11 ft	10.9 ft	10.98 ft	11.32 ft	11.11 ft
Width Over Tracks	5.06 ft	5.29 ft	5.29 ft	5.29 ft	5.29 ft	6.01 ft	5.98 ft	6.57 ft	5.98 ft	7.19 ft	5.06 ft	5.29 ft
Height To Top Of Cab	6.85 ft	7.09 ft	8.13 ft	8.13 ft	8.13 ft	6.93 ft	7.17 ft	7.16 ft	8.21 ft	7.12 ft	6.85 ft	7.09 ft
Length Of Track On Ground	5.5 ft	5.53 ft	5.53 ft	5.53 ft	5.53 ft	5.5 ft	5.53 ft	5.53 ft	5.55 ft	5.98 ft	5.5 ft	5.53 ft
Ground Clearance	1.02 ft	1.02 ft	0.97 ft	0.97 ft	0.97 ft	1.24 ft	1.24 ft	1.24 ft	1.19 ft	1.19 ft	1.02 ft	1.02 ft

Undercarriage
Specification	D20A-3	D20A-5	D20A-6	D20A-7	D20A-7E	D20P-3	D20P-5	D20P-5a	D20P-6	D20PL-5	D21A-3	D21A-5
Track Gauge	3.91 ft	4.3 ft	4.3 ft	4.3 ft	4.3 ft	4.34 ft	4.3 ft	4.89 ft	4.3 ft	4.89 ft	3.91 ft	4.3 ft
Standard Shoe Size	11.82 in	11.82 in	11.82 in	11.82 in	11.82 in	20.08 in	20.08 in	20.08 in	20.08 in	27.56 in	11.82 in	11.82 in
Track Pitch	5.32 in	5.32 in	5.32 in	5.32 in	135 in	5.32 in	5.32 in	5.32 in	5.32 in	5.32 in	5.32 in	5.32 in

Engine
Specification	D20A-3	D20A-5	D20A-6	D20A-7	D20A-7E	D20P-3	D20P-5	D20P-5a	D20P-6	D20PL-5	D21A-3	D21A-5
Number Of Cylinders	4	4	4	4	4	4	4	4	4	4	4	4
Engine Model	4D95-1A	4D94-2N	4D95S	4D95S	4D94E	4D92-1A	4D92-2N	4D92-2N	4D95S-W1	4D94-2N	4D92-1	4D92-2P
Gross Power	35 hp	39 hp	40 hp	40 hp	40 hp	35 hp	39 hp	39 hp	40 hp	39 hp	37 hp	39 hp
Power Measured @	2,450 rpm	2,450 rpm	2,450 rpm	2,450 rpm	2,450 rpm	2,450 rpm	2,450 rpm	2,450 rpm	2,450 rpm	2,450 rpm	2,450 rpm	2,450 rpm
Displacement	158.7 cu in	179.5 cu in	164.2 cu in	164.2 cu in	169.4 cu in	158.7 cu in	179.5 cu in	179.5 cu in	164.2 cu in	179.5 cu in	159 cu in	179.5 cu in

Operational
Specification	D20A-3	D20A-5	D20A-6	D20A-7	D20A-7E	D20P-3	D20P-5	D20P-5a	D20P-6	D20PL-5	D21A-3	D21A-5
Operating Weight	7,341 lb	7,849 lb	7,827 lb	7,827 lb	8,003 lb	7,937 lb	8,334 lb	8,620 lb	8,466 lb	8,554 lb	7,562 lb	7,981 lb

Transmission and speeds
Specification	D20A-3	D20A-5	D20A-6	D20A-7	D20A-7E	D20P-3	D20P-5	D20P-5a	D20P-6	D20PL-5	D21A-3	D21A-5
Transmission Type	DD	DD	DD	DD	DD	DD	DD	DD	DD	DD	HS	HS
Number Of Forward Gears	3	3	3	3	3	3	3	3	3	3	3	2
Number Of Reverse Gears	2	2	2	2	2	2	2	2	2	2	3	2

Standard Blade
Specification	D20A-3	D20A-5	D20A-6	D20A-7	D20A-7E	D20P-3	D20P-5	D20P-5a	D20P-6	D20PL-5	D21A-3	D21A-5
Blade width	7.6 ft	7.2 ft	7.2 ft	7.2 ft	7.2 ft	7.2 ft	7.2 ft	8.4 ft	7.2 ft	8.3 ft	7.6 ft	7.2 ft
Blade height	22.3 in	23.3 in	23.3 in	23.3 in	23.3 in	23.1 in	23.3 in	23.3 in	23.3 in	23.3 in	22.3 in	23.3 in

More in Komatsu: D20Q-5–D21S-5, D10S-2, D20P-6A–D21A-7.

Komatsu D20A-3 to D21A-5 specifications

D20A-3 to D21A-5: owner reports

Sources for this page

Komatsu D20A-3 to D21A-5: Configuration records