Machine models

Komatsu D40A-1 to D50A-15 specifications

Entries in this reference
Listing-entry count
9

Short answer

Komatsu D40A-1 to D50A-15: crawler dozers.

Selected configuration figures
Configuration	Documented field and quantity
D40A-1	Gross Power 80 hp Operating Weight 20,547 lb
D40A-5	Gross Power 95 hp Operating Weight 23,369 lb
D40P-1	Gross Power 80 hp Operating Weight 22,708 lb
D40PL-1	Gross Power 80 hp Operating Weight 23,810 lb
D41A-5	Gross Power 95 hp Operating Weight 23,369 lb
D41A-5A	Gross Power 95 hp Operating Weight 23,369 lb
D45A-1	Gross Power 90 hp Operating Weight 21,054 lb
D45P-1	Gross Power 90 hp Operating Weight 23,149 lb
D50A-15	Gross Power 90 hp Operating Weight 25,254 lb

D40A-1 to D50A-15 specification matrix — Listing labels reported by the source
Publisher name	Source guide	Listing-entry count	Labels named by the source
Komatsu	D40A-1 to D50A-15	9	D40A-1, D40A-5, D40P-1, D40PL-1, D41A-5, D41A-5A, and 3 more

Dimensions and weight
Specification	D40A-1	D40A-5	D40P-1	D40PL-1	D41A-5	D41A-5A	D45A-1	D45P-1	D50A-15
Length W/ Blade	13.95 ft	14.69 ft	15.31 ft	15.31 ft	14.69 ft	14.69 ft	13.95 ft	15.23 ft	15.23 ft
Width Over Tracks	6.37 ft	7.09 ft	8.14 ft	11.42 ft	7.09 ft	7.09 ft	6.37 ft	8.14 ft	6.73 ft
Height To Top Of Cab	8.6 ft	9.17 ft	8.57 ft	8.57 ft	9.17 ft	9.17 ft	8.6 ft	8.37 ft	8.73 ft
Length Of Track On Ground	6.76 ft	7.34 ft	8.5 ft	8.5 ft	7.34 ft	7.34 ft	6.76 ft	8.5 ft	7.22 ft
Ground Clearance	1.19 ft	1.19 ft	1.42 ft	1.42 ft	1.19 ft	1.19 ft	1.19 ft	1.42 ft	1.15 ft

Specification	D40A-1	D40A-5	D40P-1	D41A-5	D41A-5A	D45A-1	D45P-1	D50A-15
Length W/O Blade	10.8 ft	11.19 ft	11.78 ft	11.19 ft	11.19 ft	10.8 ft	11.78 ft	11.62 ft

Undercarriage
Specification	D40A-1	D40A-5	D40P-1	D40PL-1	D41A-5	D41A-5A	D45A-1	D45P-1	D50A-15
Track Gauge	5.06 ft	5.78 ft	5.78 ft	7.42 ft	5.78 ft	5.78 ft	5.06 ft	5.78 ft	5.25 ft
Standard Shoe Size	15.75 in	15.75 in	28.35 in	48.04 in	15.75 in	15.75 in	15.75 in	28.35 in	15.75 in
Number Of Shoes Per Side	37	39	720	43	39	39	37	43	39
Number Of Carrier Rollers Per Side	1	1	1	1	1	1	1	1	2
Number Of Track Rollers Per Side	5	6	6	6	6	6	5	6	5
Track Pitch	6.89 in	6.89 in	6.89 in	6.89 in	6.89 in	6.89 in	6.89 in	6.89 in	6.89 in

Specification	D40A-1	D40P-1	D45A-1	D45P-1	D50A-15
Ground Pressure	7.17 psi	3.41 psi	7.17 psi	3.41 psi	7.68 psi

Engine
Specification	D40A-1	D40A-5	D40P-1	D40PL-1	D41A-5	D41A-5A	D45A-1	D45P-1	D50A-15
Number Of Cylinders	4	6	4	4	6	6	4	4	4
Engine Model	S4D105	6D105-1	S4D105-3	S4D105-3	6D105-1	6D105-1	S4D105-1	S4D105-3	S4D120
Gross Power	80 hp	95 hp	80 hp	80 hp	95 hp	95 hp	90 hp	90 hp	90 hp
Power Measured @	2,400 rpm	2,350 rpm	2,400 rpm	2,400 rpm	2,350 rpm	2,350 rpm	2,400 rpm	2,400 rpm	1,750 rpm
Displacement	242.9 cu in	396.7 cu in	264.3 cu in	264.3 cu in	396.7 cu in	396.7 cu in	242.9 cu in	264.3 cu in	441.9 cu in

Operational
Specification	D40A-1	D40A-5	D40P-1	D40PL-1	D41A-5	D41A-5A	D45A-1	D45P-1	D50A-15
Operating Weight	20,547 lb	23,369 lb	22,708 lb	23,810 lb	23,369 lb	23,369 lb	21,054 lb	23,149 lb	25,254 lb

Specification	D40A-1	D45A-1	D50A-15
Fuel Capacity	55.5 gal	55.5 gal	63.5 gal
Cooling System Fluid Capacity	9 gal	11.4 gal	11.1 gal

Transmission and speeds
Specification	D40A-1	D40A-5	D40P-1	D40PL-1	D41A-5	D41A-5A	D45A-1	D45P-1	D50A-15
Transmission Type	DD	DD	DD	DD	HS	HS	TF	TF	DD
Number Of Forward Gears	4	5	4	4	3	3	3	3	4
Number Of Reverse Gears	3	4	3	3	3	3	3	3	3

Specification	D40A-1	D45A-1	D50A-15
Max Speed - Forward	6 mph	5.6 mph	5.9 mph
Max Speed - Reverse	4.8 mph	6.8 mph	5 mph

Standard Blade
Specification	D40A-1	D40A-5	D40P-1	D40PL-1	D41A-5	D41A-5A	D45A-1	D45P-1	D50A-15
Blade width	10.4 ft	9 ft	9.9 ft	13.3 ft	9 ft	9 ft	10.4 ft	9.9 ft	11 ft
Blade height	29.6 in	35.9 in	35.5 in	23.1 in	35.9 in	35.9 in	29.6 in	35.3 in	33.7 in

Specification	D40A-1	D40P-1	D45A-1	D45P-1	D50A-15
Cutting Depth	15 in	15 in	15 in	14 in	21.3 in

Specification	D40P-1	D45P-1	D50A-15
Capacity	3.2 yd3	3.2 yd3	3.3 yd3

Variants — Source comparison annotation
Source guide	Differing-field count reported
D40A-1 to D50A-15	29

Ratios
Figure	D40A-1	D40A-5	D40P-1	D40PL-1	D41A-5	D41A-5A	D45A-1	D45P-1	D50A-15
Engine horsepower per 1,000 lb of weight	3.9	4.1	3.5	3.4	4.1	4.1	4.3	3.9	3.6

Figure	D40A-1	D45A-1	D50A-15
Fuel tank per engine horsepower	0.69 gal	0.62 gal	0.71 gal

D40A-1 to D50A-15: owner reports

Sources: 3 forum discussions about the Komatsu D41 dozers (D41E, D41P); heavyequipmentforums.com.

Komatsu: Smoke, pump leak and transmission fade.

D40A-1 to D50A-15: forum references — Forum-title search
Forum index	Equipment class queried	Names in the search	Matching titles
Heavy Equipment Forums	crawler dozer	Komatsu and the D40A, D40, D41A, D45A line that the D40A-1, D40A-5, D40P-1, D40PL-1 belongs to (no title names the exact model)	13

Topics named by those titles
Title topic	Titles
transmission and drive	4
brakes and steering	3

Topic in the title	Threads	Share of matching threads
transmission and drive	4	31%
brakes and steering	3	23%

Komatsu D41a 3 Brake Pedals (Heavy Equipment Forums, 2024-03-17)
Komatsu D45p 1 Trans Temp (Heavy Equipment Forums, 2024-02-02)
Komatsu D45p 1 High Pressure Fuel Lines (Heavy Equipment Forums, 2023-08-21)
Komatsu D45p 1 Steering Problem (Heavy Equipment Forums, 2023-07-14)

D40A-1 to D50A-15: dated market and recall observations — Dated listing search
Date	Listing index	Equipment class	Names queried	Result
2026-09-24	MachineryTrader (machinerytrader.com)	crawler dozer	D40A-1, D40A-5, D40P-1	No matching offers in this snapshot

Dated CPSC search
Date	Database	Names queried	Result
2026-09-24	U.S. Consumer Product Safety Commission	Komatsu; D40A-1, D40A-5, D40P-1	No matching recall in the stated search

Sources for this page
Evidence class	Document, classification and recorded date
Reference site	Reference site: Komatsu D40A-1 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D40A-5 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D40P-1 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D40PL-1 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D41A-5 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D41A-5A — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D45A-1 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D45P-1 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D50A-15 — RitchieSpecs. Observed 2026-09-24.
Forum threads	Forum threads: Heavy Equipment Forums thread index for Komatsu D40A-1 to D50A-15 — Heavy Equipment Forums. Observed 2026-09-24.
Forum threads	Forum threads: Forum threads read for the Komatsu D41 dozers (D41E, D41P) — Heavyequipmentforums. 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 D40A-1 to D50A-15: Configuration records

D40A-1

Specification	Source figure
Dimensions and weight
Length W/ Blade	13.95 ft
Width Over Tracks	6.37 ft
Height To Top Of Cab	8.6 ft
Length Of Track On Ground	6.76 ft
Ground Clearance	1.19 ft
Length W/O Blade	10.8 ft
Undercarriage
Track Gauge	5.06 ft
Standard Shoe Size	15.75 in
Number Of Shoes Per Side	37
Number Of Carrier Rollers Per Side	1
Ground Pressure	7.17 psi
Number Of Track Rollers Per Side	5
Track Pitch	6.89 in
Engine
Number Of Cylinders	4
Engine Model	S4D105
Gross Power	80 hp
Power Measured @	2,400 rpm
Displacement	242.9 cu in
Operational
Operating Weight	20,547 lb
Fuel Capacity	55.5 gal
Cooling System Fluid Capacity	9 gal
Transmission and speeds
Transmission Type	DD
Number Of Forward Gears	4
Number Of Reverse Gears	3
Max Speed - Forward	6 mph
Max Speed - Reverse	4.8 mph
Standard Blade
Blade width	10.4 ft
Blade height	29.6 in
Cutting Depth	15 in

Source

D40A-5

Specification	Source figure
Dimensions and weight
Length W/ Blade	14.69 ft
Width Over Tracks	7.09 ft
Height To Top Of Cab	9.17 ft
Length Of Track On Ground	7.34 ft
Ground Clearance	1.19 ft
Length W/O Blade	11.19 ft
Undercarriage
Track Gauge	5.78 ft
Standard Shoe Size	15.75 in
Number Of Shoes Per Side	39
Number Of Carrier Rollers Per Side	1
Number Of Track Rollers Per Side	6
Track Pitch	6.89 in
Engine
Number Of Cylinders	6
Engine Model	6D105-1
Gross Power	95 hp
Power Measured @	2,350 rpm
Displacement	396.7 cu in
Operational
Operating Weight	23,369 lb
Transmission and speeds
Transmission Type	DD
Number Of Forward Gears	5
Number Of Reverse Gears	4
Standard Blade
Blade width	9 ft
Blade height	35.9 in

Source

D40P-1

Specification	Source figure
Dimensions and weight
Length W/ Blade	15.31 ft
Width Over Tracks	8.14 ft
Height To Top Of Cab	8.57 ft
Length Of Track On Ground	8.5 ft
Ground Clearance	1.42 ft
Length W/O Blade	11.78 ft
Undercarriage
Track Gauge	5.78 ft
Standard Shoe Size	28.35 in
Number Of Shoes Per Side	720
Number Of Carrier Rollers Per Side	1
Ground Pressure	3.41 psi
Number Of Track Rollers Per Side	6
Track Pitch	6.89 in
Engine
Number Of Cylinders	4
Engine Model	S4D105-3
Gross Power	80 hp
Power Measured @	2,400 rpm
Displacement	264.3 cu in
Operational
Operating Weight	22,708 lb
Transmission and speeds
Transmission Type	DD
Number Of Forward Gears	4
Number Of Reverse Gears	3
Standard Blade
Blade width	9.9 ft
Blade height	35.5 in
Cutting Depth	15 in
Capacity	3.2 yd3

Source

D40PL-1

Specification	Source figure
Dimensions and weight
Length W/ Blade	15.31 ft
Width Over Tracks	11.42 ft
Height To Top Of Cab	8.57 ft
Length Of Track On Ground	8.5 ft
Ground Clearance	1.42 ft
Undercarriage
Track Gauge	7.42 ft
Standard Shoe Size	48.04 in
Number Of Shoes Per Side	43
Number Of Carrier Rollers Per Side	1
Number Of Track Rollers Per Side	6
Track Pitch	6.89 in
Engine
Number Of Cylinders	4
Engine Model	S4D105-3
Gross Power	80 hp
Power Measured @	2,400 rpm
Displacement	264.3 cu in
Operational
Operating Weight	23,810 lb
Transmission and speeds
Transmission Type	DD
Number Of Forward Gears	4
Number Of Reverse Gears	3
Standard Blade
Blade width	13.3 ft
Blade height	23.1 in

Source

D41A-5

Specification	Source figure
Dimensions and weight
Length W/ Blade	14.69 ft
Width Over Tracks	7.09 ft
Height To Top Of Cab	9.17 ft
Length Of Track On Ground	7.34 ft
Ground Clearance	1.19 ft
Length W/O Blade	11.19 ft
Undercarriage
Track Gauge	5.78 ft
Standard Shoe Size	15.75 in
Number Of Shoes Per Side	39
Number Of Carrier Rollers Per Side	1
Number Of Track Rollers Per Side	6
Track Pitch	6.89 in
Engine
Number Of Cylinders	6
Engine Model	6D105-1
Gross Power	95 hp
Power Measured @	2,350 rpm
Displacement	396.7 cu in
Operational
Operating Weight	23,369 lb
Transmission and speeds
Transmission Type	HS
Number Of Forward Gears	3
Number Of Reverse Gears	3
Standard Blade
Blade width	9 ft
Blade height	35.9 in

Source

D41A-5A

Specification	Source figure
Dimensions and weight
Length W/ Blade	14.69 ft
Width Over Tracks	7.09 ft
Height To Top Of Cab	9.17 ft
Length Of Track On Ground	7.34 ft
Ground Clearance	1.19 ft
Length W/O Blade	11.19 ft
Undercarriage
Track Gauge	5.78 ft
Standard Shoe Size	15.75 in
Number Of Shoes Per Side	39
Number Of Carrier Rollers Per Side	1
Number Of Track Rollers Per Side	6
Track Pitch	6.89 in
Engine
Number Of Cylinders	6
Engine Model	6D105-1
Gross Power	95 hp
Power Measured @	2,350 rpm
Displacement	396.7 cu in
Operational
Operating Weight	23,369 lb
Transmission and speeds
Transmission Type	HS
Number Of Forward Gears	3
Number Of Reverse Gears	3
Standard Blade
Blade width	9 ft
Blade height	35.9 in

Source

D45A-1

Specification	Source figure
Dimensions and weight
Length W/ Blade	13.95 ft
Width Over Tracks	6.37 ft
Height To Top Of Cab	8.6 ft
Length Of Track On Ground	6.76 ft
Ground Clearance	1.19 ft
Length W/O Blade	10.8 ft
Undercarriage
Track Gauge	5.06 ft
Standard Shoe Size	15.75 in
Number Of Shoes Per Side	37
Number Of Carrier Rollers Per Side	1
Ground Pressure	7.17 psi
Number Of Track Rollers Per Side	5
Track Pitch	6.89 in
Engine
Number Of Cylinders	4
Engine Model	S4D105-1
Gross Power	90 hp
Power Measured @	2,400 rpm
Displacement	242.9 cu in
Operational
Operating Weight	21,054 lb
Fuel Capacity	55.5 gal
Cooling System Fluid Capacity	11.4 gal
Transmission and speeds
Transmission Type	TF
Number Of Forward Gears	3
Number Of Reverse Gears	3
Max Speed - Forward	5.6 mph
Max Speed - Reverse	6.8 mph
Standard Blade
Blade width	10.4 ft
Blade height	29.6 in
Cutting Depth	15 in

Source

D45P-1

Specification	Source figure
Dimensions and weight
Length W/ Blade	15.23 ft
Width Over Tracks	8.14 ft
Height To Top Of Cab	8.37 ft
Length Of Track On Ground	8.5 ft
Ground Clearance	1.42 ft
Length W/O Blade	11.78 ft
Undercarriage
Track Gauge	5.78 ft
Standard Shoe Size	28.35 in
Number Of Shoes Per Side	43
Number Of Carrier Rollers Per Side	1
Ground Pressure	3.41 psi
Number Of Track Rollers Per Side	6
Track Pitch	6.89 in
Engine
Number Of Cylinders	4
Engine Model	S4D105-3
Gross Power	90 hp
Power Measured @	2,400 rpm
Displacement	264.3 cu in
Operational
Operating Weight	23,149 lb
Transmission and speeds
Transmission Type	TF
Number Of Forward Gears	3
Number Of Reverse Gears	3
Standard Blade
Blade width	9.9 ft
Blade height	35.3 in
Cutting Depth	14 in
Capacity	3.2 yd3

Source

D50A-15

Specification	Source figure
Dimensions and weight
Length W/ Blade	15.23 ft
Width Over Tracks	6.73 ft
Height To Top Of Cab	8.73 ft
Length Of Track On Ground	7.22 ft
Ground Clearance	1.15 ft
Length W/O Blade	11.62 ft
Undercarriage
Track Gauge	5.25 ft
Standard Shoe Size	15.75 in
Number Of Shoes Per Side	39
Number Of Carrier Rollers Per Side	2
Ground Pressure	7.68 psi
Number Of Track Rollers Per Side	5
Track Pitch	6.89 in
Engine
Number Of Cylinders	4
Engine Model	S4D120
Gross Power	90 hp
Power Measured @	1,750 rpm
Displacement	441.9 cu in
Operational
Operating Weight	25,254 lb
Fuel Capacity	63.5 gal
Cooling System Fluid Capacity	11.1 gal
Transmission and speeds
Transmission Type	DD
Number Of Forward Gears	4
Number Of Reverse Gears	3
Max Speed - Forward	5.9 mph
Max Speed - Reverse	5 mph
Standard Blade
Blade width	11 ft
Blade height	33.7 in
Cutting Depth	21.3 in
Capacity	3.3 yd3

Source

Compare Komatsu D40A-1, D40A-5, D40P-1, D40PL-1, D41A-5, D41A-5A, D45A-1, D45P-1, D50A-15

Dimensions and weight
Specification	D40A-1	D40A-5	D40P-1	D40PL-1	D41A-5	D41A-5A	D45A-1	D45P-1	D50A-15
Length W/ Blade	13.95 ft	14.69 ft	15.31 ft	15.31 ft	14.69 ft	14.69 ft	13.95 ft	15.23 ft	15.23 ft
Width Over Tracks	6.37 ft	7.09 ft	8.14 ft	11.42 ft	7.09 ft	7.09 ft	6.37 ft	8.14 ft	6.73 ft
Height To Top Of Cab	8.6 ft	9.17 ft	8.57 ft	8.57 ft	9.17 ft	9.17 ft	8.6 ft	8.37 ft	8.73 ft
Length Of Track On Ground	6.76 ft	7.34 ft	8.5 ft	8.5 ft	7.34 ft	7.34 ft	6.76 ft	8.5 ft	7.22 ft
Ground Clearance	1.19 ft	1.19 ft	1.42 ft	1.42 ft	1.19 ft	1.19 ft	1.19 ft	1.42 ft	1.15 ft

Undercarriage
Specification	D40A-1	D40A-5	D40P-1	D40PL-1	D41A-5	D41A-5A	D45A-1	D45P-1	D50A-15
Track Gauge	5.06 ft	5.78 ft	5.78 ft	7.42 ft	5.78 ft	5.78 ft	5.06 ft	5.78 ft	5.25 ft
Standard Shoe Size	15.75 in	15.75 in	28.35 in	48.04 in	15.75 in	15.75 in	15.75 in	28.35 in	15.75 in
Number Of Shoes Per Side	37	39	720	43	39	39	37	43	39
Number Of Carrier Rollers Per Side	1	1	1	1	1	1	1	1	2
Number Of Track Rollers Per Side	5	6	6	6	6	6	5	6	5
Track Pitch	6.89 in	6.89 in	6.89 in	6.89 in	6.89 in	6.89 in	6.89 in	6.89 in	6.89 in

Engine
Specification	D40A-1	D40A-5	D40P-1	D40PL-1	D41A-5	D41A-5A	D45A-1	D45P-1	D50A-15
Number Of Cylinders	4	6	4	4	6	6	4	4	4
Engine Model	S4D105	6D105-1	S4D105-3	S4D105-3	6D105-1	6D105-1	S4D105-1	S4D105-3	S4D120
Gross Power	80 hp	95 hp	80 hp	80 hp	95 hp	95 hp	90 hp	90 hp	90 hp
Power Measured @	2,400 rpm	2,350 rpm	2,400 rpm	2,400 rpm	2,350 rpm	2,350 rpm	2,400 rpm	2,400 rpm	1,750 rpm
Displacement	242.9 cu in	396.7 cu in	264.3 cu in	264.3 cu in	396.7 cu in	396.7 cu in	242.9 cu in	264.3 cu in	441.9 cu in

Operational
Specification	D40A-1	D40A-5	D40P-1	D40PL-1	D41A-5	D41A-5A	D45A-1	D45P-1	D50A-15
Operating Weight	20,547 lb	23,369 lb	22,708 lb	23,810 lb	23,369 lb	23,369 lb	21,054 lb	23,149 lb	25,254 lb

Transmission and speeds
Specification	D40A-1	D40A-5	D40P-1	D40PL-1	D41A-5	D41A-5A	D45A-1	D45P-1	D50A-15
Transmission Type	DD	DD	DD	DD	HS	HS	TF	TF	DD
Number Of Forward Gears	4	5	4	4	3	3	3	3	4
Number Of Reverse Gears	3	4	3	3	3	3	3	3	3

Standard Blade
Specification	D40A-1	D40A-5	D40P-1	D40PL-1	D41A-5	D41A-5A	D45A-1	D45P-1	D50A-15
Blade width	10.4 ft	9 ft	9.9 ft	13.3 ft	9 ft	9 ft	10.4 ft	9.9 ft	11 ft
Blade height	29.6 in	35.9 in	35.5 in	23.1 in	35.9 in	35.9 in	29.6 in	35.3 in	33.7 in

More in Komatsu: D37P-2A–D41P-5, D31EX-22–D39PX22, D37PX-23: PAT dozer weight/HST/market equipment.

Komatsu D40A-1 to D50A-15 specifications

D40A-1 to D50A-15: owner reports

Sources for this page

Komatsu D40A-1 to D50A-15: Configuration records