Machine models

Komatsu D21A-7E to FD40PL-1 specifications

Entries in this reference
Listing-entry count
12

Short answer

Komatsu D21A-7E to FD40PL-1: crawler dozers.

Selected configuration figures
Configuration	Documented field and quantity
D21A-7E	Gross Power 40 hp Operating Weight 8,113 lb
D21AG-6	Gross Power 40 hp Operating Weight 8,025 lb
D21AG-7	Gross Power 40 hp Operating Weight 8,025 lb
D21AG-7E	Gross Power 40 hp Operating Weight 8,201 lb
D21P-6A	Gross Power 40 hp Operating Weight 8,797 lb
D21PG-6A	Gross Power 40 hp Operating Weight 8,885 lb
D21PG-7A	Gross Power 40 hp Operating Weight 8,885 lb
D21PL-6	Gross Power 40 hp Operating Weight 8,995 lb
D21PL-7	Gross Power 40 hp Operating Weight 8,995 lb
D21PL-7E	Gross Power 40 hp Operating Weight 9,061 lb
FD40P-1	Gross Power 40 hp Operating Weight 9,370 lb
FD40PL-1	Gross Power 40 hp Operating Weight 9,745 lb

D21A-7E to FD40PL-1 specification matrix — Listing labels reported by the source
Publisher name	Source guide	Listing-entry count	Labels named by the source
Komatsu	D21A-7E to FD40PL-1	12	D21A-7E, D21AG-6, D21AG-7, D21AG-7E, D21P-6A, D21PG-6A, and 6 more

Dimensions and weight
Specification	D21A-7E	D21AG-6	D21AG-7	D21AG-7E	D21P-6A	D21PG-6A	D21PG-7A	D21PL-6	D21PL-7	D21PL-7E	FD40P-1	FD40PL-1
Length W/ Blade	11.16 ft	11.16 ft	11.16 ft	11.16 ft	11.11 ft	11.11 ft	11.11 ft	11.34 ft	11.34 ft	11.34 ft	11.42 ft	11.57 ft
Width Over Tracks	5.29 ft	5.29 ft	5.29 ft	5.29 ft	6.57 ft	6.53 ft	6.53 ft	7.19 ft	7.19 ft	7.19 ft	6.57 ft	7.19 ft
Height To Top Of Cab	8.13 ft	8.17 ft	8.17 ft	8.09 ft	8.21 ft	8.24 ft	8.24 ft	8.16 ft	8.16 ft	8.16 ft	8.19 ft	8.17 ft
Length Of Track On Ground	5.53 ft	5.53 ft	5.53 ft	5.58 ft	5.53 ft	5.53 ft	5.53 ft	5.98 ft	5.98 ft	5.98 ft	5.53 ft	6.19 ft
Ground Clearance	0.97 ft	0.99 ft	0.99 ft	0.92 ft	1.17 ft	1.2 ft	1.2 ft	1.12 ft	1.12 ft	1.12 ft	1.05 ft	1.04 ft

Specification	D21A-7E	D21AG-6	D21AG-7	D21P-6A	D21PG-6A	D21PG-7A	D21PL-6	D21PL-7	D21PL-7E	FD40P-1	FD40PL-1
Length W/O Blade	8.4 ft	8.37 ft	8.37 ft	8.37 ft	8.37 ft	8.37 ft	8.7 ft	8.7 ft	8.7 ft	7.94 ft	8.57 ft

Undercarriage
Specification	D21A-7E	D21AG-6	D21AG-7	D21AG-7E	D21P-6A	D21PG-6A	D21PG-7A	D21PL-6	D21PL-7	D21PL-7E	FD40P-1	FD40PL-1
Track Gauge	4.3 ft	4.3 ft	4.3 ft	4.3 ft	4.89 ft	4.89 ft	4.89 ft	4.89 ft	4.89 ft	4.89 ft	4.89 ft	4.89 ft
Standard Shoe Size	11.82 in	11.82 in	11.82 in	11.82 in	20.08 in	19.69 in	19.69 in	27.56 in	27.56 in	27.56 in	20.08 in	27.56 in
Number Of Track Rollers Per Side	5	5	5	5	5	5	5	6	6	6	5	6
Track Pitch	5.32 in	5.77 in	5.77 in	2.8 in	5.32 in	5.77 in	5.77 in	5.32 in	5.32 in	5.32 in	5.32 in	5.32 in

Specification	D21P-6A	D21PG-6A	D21PL-6	FD40P-1	FD40PL-1
Number Of Shoes Per Side	37	67	39	70	60

Specification	FD40P-1	FD40PL-1
Number Of Carrier Rollers Per Side	1	1

Engine
Specification	D21A-7E	D21AG-6	D21AG-7	D21AG-7E	D21P-6A	D21PG-7A	D21PL-6	D21PL-7	FD40P-1	FD40PL-1
Number Of Cylinders	4	4	4	4	4	4	4	4	4	4

Specification	D21A-7E	D21AG-6	D21AG-7	D21AG-7E	D21P-6A	D21PG-6A	D21PG-7A	D21PL-6	D21PL-7	D21PL-7E	FD40P-1	FD40PL-1
Engine Model	4D94E	4D95S-W	4D95S	4D94E	4D95S	4D95S-W	4D95S	4D95S-W1	4D95S	4D94E	A-4JG2	A-4JG2
Gross Power	40 hp	40 hp	40 hp	40 hp	40 hp	40 hp	40 hp	40 hp	40 hp	40 hp	40 hp	40 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	2,200 rpm	2,200 rpm
Displacement	169.4 cu in	164.2 cu in	164.2 cu in	169.4 cu in	164.2 cu in	164.2 cu in	164.2 cu in	180.7 cu in	164.2 cu in	169.4 cu in	186.7 cu in	186.7 cu in

Operational
Specification	D21A-7E	D21AG-6	D21AG-7	D21AG-7E	D21P-6A	D21PG-6A	D21PG-7A	D21PL-6	D21PL-7	D21PL-7E	FD40P-1	FD40PL-1
Operating Weight	8,113 lb	8,025 lb	8,025 lb	8,201 lb	8,797 lb	8,885 lb	8,885 lb	8,995 lb	8,995 lb	9,061 lb	9,370 lb	9,745 lb

Transmission and speeds
Specification	D21A-7E	D21AG-6	D21AG-7	D21AG-7E	D21P-6A	D21PG-6A	D21PG-7A	D21PL-6	D21PL-7	D21PL-7E	FD40P-1	FD40PL-1
Transmission Type	HS	HS	HS	HS	HS	HS	HS	HS	HS	HS	DD	DD
Number Of Forward Gears	2	2	2	2	2	2	2	3	2	2	3	3
Number Of Reverse Gears	2	2	2	2	2	2	2	2	2	2	2	2

Standard Blade
Specification	D21A-7E	D21AG-6	D21AG-7	D21AG-7E	D21P-6A	D21PG-6A	D21PG-7A	D21PL-6	D21PL-7	D21PL-7E	FD40P-1	FD40PL-1
Blade width	7.2 ft	7.2 ft	7.2 ft	7.2 ft	8.4 ft	8.4 ft	8.4 ft	8.2 ft	8.2 ft	8.2 ft	8.4 ft	8.2 ft
Blade height	23.3 in	23.3 in	23.3 in	23.3 in	23.3 in	23.3 in	23.3 in	23.3 in	23.3 in	23.3 in	23.5 in	23.5 in

Variants — Source comparison annotation
Source guide	Differing-field count reported
D21A-7E to FD40PL-1	21

Ratios
Figure	D21A-7E	D21AG-6	D21AG-7	D21AG-7E	D21P-6A	D21PG-6A	D21PG-7A	D21PL-6	D21PL-7	D21PL-7E	FD40P-1	FD40PL-1
Engine horsepower per 1,000 lb of weight	4.9	5.0	5.0	4.9	4.5	4.5	4.5	4.4	4.4	4.4	4.3	4.1

D21A-7E to FD40PL-1: owner reports

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

Komatsu: Steering clutches and unexplained warning lights.

D21A-7E to FD40PL-1: forum references — Forum-title search
Forum index	Equipment class queried	Names in the search	Matching titles
Heavy Equipment Forums and TractorByNet	crawler dozer	Komatsu and the D21A, D21, D21P line that the D21A-7E, D21AG-6, D21AG-7, D21AG-7E belongs to (no title names the exact model)	283

Topics named by those titles
Title topic	Titles
brakes and steering	49
transmission and drive	44
tracks and undercarriage	15

Topic in the title	Threads	Share of matching threads
brakes and steering	49	17%
transmission and drive	44	16%
tracks and undercarriage	15	5%
fuel system	7	2%
hydraulics	7	2%

Komatsu D21a 6 Right Side Track Jammed (Heavy Equipment Forums, 2026-07-02)
1997 Komatsu D21 P Adjust Steering Brake Help Please (Heavy Equipment Forums, 2026-04-28)
Komatsu D21 P 1997 (TractorByNet, 2026-04-27)
Komatsu D21 P 1997 (TractorByNet, 2026-04-25)

D21A-7E to FD40PL-1: dated market and recall observations — Dated listing search
Date	Listing index	Equipment class	Names queried	Result
2026-09-24	MachineryTrader (machinerytrader.com)	crawler dozer	D21A-7E, D21AG-6, D21AG-7	No matching offers in this snapshot

Dated CPSC search
Date	Database	Names queried	Result
2026-09-24	U.S. Consumer Product Safety Commission	Komatsu; D21A-7E, D21AG-6, D21AG-7	No matching recall in the stated search

Sources for this page
Evidence class	Document, classification and recorded date
Reference site	Reference site: Komatsu D21A-7E — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D21AG-6 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D21AG-7 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D21AG-7E — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D21P-6A — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D21PG-6A — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D21PG-7A — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D21PL-6 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D21PL-7 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu D21PL-7E — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu FD40P-1 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu FD40PL-1 — RitchieSpecs. Observed 2026-09-24.
Forum threads	Forum threads: Heavy Equipment Forums thread index for Komatsu D21A-7E to FD40PL-1 — Heavy Equipment Forums. Observed 2026-09-24.
Forum threads	Forum threads: TractorByNet thread index for Komatsu D21A-7E to FD40PL-1 — TractorByNet. Observed 2026-09-24.
Forum threads	Forum threads: Forum threads read for the Komatsu D21 dozers (D21P-6) — 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 D21A-7E to FD40PL-1: Configuration records

D21A-7E

Specification	Source figure
Dimensions and weight
Length W/ Blade	11.16 ft
Width Over Tracks	5.29 ft
Height To Top Of Cab	8.13 ft
Length Of Track On Ground	5.53 ft
Ground Clearance	0.97 ft
Length W/O Blade	8.4 ft
Undercarriage
Track Gauge	4.3 ft
Standard Shoe Size	11.82 in
Number Of Track Rollers Per Side	5
Track Pitch	5.32 in
Engine
Number Of Cylinders	4
Engine Model	4D94E
Gross Power	40 hp
Power Measured @	2,450 rpm
Displacement	169.4 cu in
Operational
Operating Weight	8,113 lb
Transmission and speeds
Transmission Type	HS
Number Of Forward Gears	2
Number Of Reverse Gears	2
Standard Blade
Blade width	7.2 ft
Blade height	23.3 in

Source

D21AG-6

Specification	Source figure
Dimensions and weight
Length W/ Blade	11.16 ft
Width Over Tracks	5.29 ft
Height To Top Of Cab	8.17 ft
Length Of Track On Ground	5.53 ft
Ground Clearance	0.99 ft
Length W/O Blade	8.37 ft
Undercarriage
Track Gauge	4.3 ft
Standard Shoe Size	11.82 in
Number Of Track Rollers Per Side	5
Track Pitch	5.77 in
Engine
Number Of Cylinders	4
Engine Model	4D95S-W
Gross Power	40 hp
Power Measured @	2,450 rpm
Displacement	164.2 cu in
Operational
Operating Weight	8,025 lb
Transmission and speeds
Transmission Type	HS
Number Of Forward Gears	2
Number Of Reverse Gears	2
Standard Blade
Blade width	7.2 ft
Blade height	23.3 in

Source

D21AG-7

Specification	Source figure
Dimensions and weight
Length W/ Blade	11.16 ft
Width Over Tracks	5.29 ft
Height To Top Of Cab	8.17 ft
Length Of Track On Ground	5.53 ft
Ground Clearance	0.99 ft
Length W/O Blade	8.37 ft
Undercarriage
Track Gauge	4.3 ft
Standard Shoe Size	11.82 in
Number Of Track Rollers Per Side	5
Track Pitch	5.77 in
Engine
Number Of Cylinders	4
Engine Model	4D95S
Gross Power	40 hp
Power Measured @	2,450 rpm
Displacement	164.2 cu in
Operational
Operating Weight	8,025 lb
Transmission and speeds
Transmission Type	HS
Number Of Forward Gears	2
Number Of Reverse Gears	2
Standard Blade
Blade width	7.2 ft
Blade height	23.3 in

Source

D21AG-7E

Specification	Source figure
Dimensions and weight
Length W/ Blade	11.16 ft
Width Over Tracks	5.29 ft
Height To Top Of Cab	8.09 ft
Length Of Track On Ground	5.58 ft
Ground Clearance	0.92 ft
Undercarriage
Track Gauge	4.3 ft
Standard Shoe Size	11.82 in
Number Of Track Rollers Per Side	5
Track Pitch	2.8 in
Engine
Number Of Cylinders	4
Engine Model	4D94E
Gross Power	40 hp
Power Measured @	2,450 rpm
Displacement	169.4 cu in
Operational
Operating Weight	8,201 lb
Transmission and speeds
Transmission Type	HS
Number Of Forward Gears	2
Number Of Reverse Gears	2
Standard Blade
Blade width	7.2 ft
Blade height	23.3 in

Source

D21P-6A

Specification	Source figure
Dimensions and weight
Length W/ Blade	11.11 ft
Width Over Tracks	6.57 ft
Height To Top Of Cab	8.21 ft
Length Of Track On Ground	5.53 ft
Ground Clearance	1.17 ft
Length W/O Blade	8.37 ft
Undercarriage
Track Gauge	4.89 ft
Standard Shoe Size	20.08 in
Number Of Track Rollers Per Side	5
Track Pitch	5.32 in
Number Of Shoes Per Side	37
Engine
Number Of Cylinders	4
Engine Model	4D95S
Gross Power	40 hp
Power Measured @	2,450 rpm
Displacement	164.2 cu in
Operational
Operating Weight	8,797 lb
Transmission and speeds
Transmission Type	HS
Number Of Forward Gears	2
Number Of Reverse Gears	2
Standard Blade
Blade width	8.4 ft
Blade height	23.3 in

Source

D21PG-6A

Specification	Source figure
Dimensions and weight
Length W/ Blade	11.11 ft
Width Over Tracks	6.53 ft
Height To Top Of Cab	8.24 ft
Length Of Track On Ground	5.53 ft
Ground Clearance	1.2 ft
Length W/O Blade	8.37 ft
Undercarriage
Track Gauge	4.89 ft
Standard Shoe Size	19.69 in
Number Of Track Rollers Per Side	5
Track Pitch	5.77 in
Number Of Shoes Per Side	67
Engine
Engine Model	4D95S-W
Gross Power	40 hp
Power Measured @	2,450 rpm
Displacement	164.2 cu in
Operational
Operating Weight	8,885 lb
Transmission and speeds
Transmission Type	HS
Number Of Forward Gears	2
Number Of Reverse Gears	2
Standard Blade
Blade width	8.4 ft
Blade height	23.3 in

Source

D21PG-7A

Specification	Source figure
Dimensions and weight
Length W/ Blade	11.11 ft
Width Over Tracks	6.53 ft
Height To Top Of Cab	8.24 ft
Length Of Track On Ground	5.53 ft
Ground Clearance	1.2 ft
Length W/O Blade	8.37 ft
Undercarriage
Track Gauge	4.89 ft
Standard Shoe Size	19.69 in
Number Of Track Rollers Per Side	5
Track Pitch	5.77 in
Engine
Number Of Cylinders	4
Engine Model	4D95S
Gross Power	40 hp
Power Measured @	2,450 rpm
Displacement	164.2 cu in
Operational
Operating Weight	8,885 lb
Transmission and speeds
Transmission Type	HS
Number Of Forward Gears	2
Number Of Reverse Gears	2
Standard Blade
Blade width	8.4 ft
Blade height	23.3 in

Source

D21PL-6

Specification	Source figure
Dimensions and weight
Length W/ Blade	11.34 ft
Width Over Tracks	7.19 ft
Height To Top Of Cab	8.16 ft
Length Of Track On Ground	5.98 ft
Ground Clearance	1.12 ft
Length W/O Blade	8.7 ft
Undercarriage
Track Gauge	4.89 ft
Standard Shoe Size	27.56 in
Number Of Track Rollers Per Side	6
Track Pitch	5.32 in
Number Of Shoes Per Side	39
Engine
Number Of Cylinders	4
Engine Model	4D95S-W1
Gross Power	40 hp
Power Measured @	2,450 rpm
Displacement	180.7 cu in
Operational
Operating Weight	8,995 lb
Transmission and speeds
Transmission Type	HS
Number Of Forward Gears	3
Number Of Reverse Gears	2
Standard Blade
Blade width	8.2 ft
Blade height	23.3 in

Source

D21PL-7

Specification	Source figure
Dimensions and weight
Length W/ Blade	11.34 ft
Width Over Tracks	7.19 ft
Height To Top Of Cab	8.16 ft
Length Of Track On Ground	5.98 ft
Ground Clearance	1.12 ft
Length W/O Blade	8.7 ft
Undercarriage
Track Gauge	4.89 ft
Standard Shoe Size	27.56 in
Number Of Track Rollers Per Side	6
Track Pitch	5.32 in
Engine
Number Of Cylinders	4
Engine Model	4D95S
Gross Power	40 hp
Power Measured @	2,450 rpm
Displacement	164.2 cu in
Operational
Operating Weight	8,995 lb
Transmission and speeds
Transmission Type	HS
Number Of Forward Gears	2
Number Of Reverse Gears	2
Standard Blade
Blade width	8.2 ft
Blade height	23.3 in

Source

D21PL-7E

Specification	Source figure
Dimensions and weight
Length W/ Blade	11.34 ft
Width Over Tracks	7.19 ft
Height To Top Of Cab	8.16 ft
Length Of Track On Ground	5.98 ft
Ground Clearance	1.12 ft
Length W/O Blade	8.7 ft
Undercarriage
Track Gauge	4.89 ft
Standard Shoe Size	27.56 in
Number Of Track Rollers Per Side	6
Track Pitch	5.32 in
Engine
Engine Model	4D94E
Gross Power	40 hp
Power Measured @	2,450 rpm
Displacement	169.4 cu in
Operational
Operating Weight	9,061 lb
Transmission and speeds
Transmission Type	HS
Number Of Forward Gears	2
Number Of Reverse Gears	2
Standard Blade
Blade width	8.2 ft
Blade height	23.3 in

Source

FD40P-1

Specification	Source figure
Dimensions and weight
Length W/ Blade	11.42 ft
Width Over Tracks	6.57 ft
Height To Top Of Cab	8.19 ft
Length Of Track On Ground	5.53 ft
Ground Clearance	1.05 ft
Length W/O Blade	7.94 ft
Undercarriage
Track Gauge	4.89 ft
Standard Shoe Size	20.08 in
Number Of Track Rollers Per Side	5
Track Pitch	5.32 in
Number Of Shoes Per Side	70
Number Of Carrier Rollers Per Side	1
Engine
Number Of Cylinders	4
Engine Model	A-4JG2
Gross Power	40 hp
Power Measured @	2,200 rpm
Displacement	186.7 cu in
Operational
Operating Weight	9,370 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	23.5 in

Source

FD40PL-1

Specification	Source figure
Dimensions and weight
Length W/ Blade	11.57 ft
Width Over Tracks	7.19 ft
Height To Top Of Cab	8.17 ft
Length Of Track On Ground	6.19 ft
Ground Clearance	1.04 ft
Length W/O Blade	8.57 ft
Undercarriage
Track Gauge	4.89 ft
Standard Shoe Size	27.56 in
Number Of Track Rollers Per Side	6
Track Pitch	5.32 in
Number Of Shoes Per Side	60
Number Of Carrier Rollers Per Side	1
Engine
Number Of Cylinders	4
Engine Model	A-4JG2
Gross Power	40 hp
Power Measured @	2,200 rpm
Displacement	186.7 cu in
Operational
Operating Weight	9,745 lb
Transmission and speeds
Transmission Type	DD
Number Of Forward Gears	3
Number Of Reverse Gears	2
Standard Blade
Blade width	8.2 ft
Blade height	23.5 in

Source

More in Komatsu: D65PX-12E/D475A-1, FD45P-1, D21P-6.

Komatsu D21A-7E to FD40PL-1 specifications

D21A-7E to FD40PL-1: owner reports

Sources for this page

Komatsu D21A-7E to FD40PL-1: Configuration records