Machine models

Komatsu PC18MR-3 to PC55MR-3 specifications

Entries in this reference
Listing-entry count
7

Short answer

Komatsu PC18MR-3 to PC55MR-3: excavators.

Selected configuration figures
Configuration	Documented field and quantity
PC18MR-3	Flywheel Horsepower 15.1 hp Operating Weight 3,924 lb
PC20MR-3	Flywheel Horsepower 20.8 hp Operating Weight 4,762 lb
PC27MR-3	Flywheel Horsepower 25.8 hp Operating Weight 6,371 lb
PC30MR-3	Flywheel Horsepower 28.7 hp Operating Weight 6,923 lb
PC35MR-3	Flywheel Horsepower 28.7 hp Operating Weight 7,893 lb
PC55MR-3	Flywheel Horsepower 38.3 hp Operating Weight 11,376 lb

PC18MR-3 to PC55MR-3 specification matrix — Listing labels reported by the source
Publisher name	Source guide	Listing-entry count	Labels named by the source
Komatsu	PC18MR-3 to PC55MR-3	7	PC18MR-3, PC20MR-3, PC27MR-3, PC30MR-3, PC35MR-3, PC55MR-3, and 1 more

Dimensions and weight
Specification	PC18MR-3	PC20MR-3	PC27MR-3	PC30MR-3	PC35MR-3	PC55MR-3	PC55MR-3
Tail Swing Radius	2.35 ft	2.65 ft	2.81 ft	2.81 ft	3.12 ft	3.48 ft	3.48 ft

Specification	PC18MR-3	PC20MR-3	PC27MR-3	PC30MR-3	PC35MR-3	PC55MR-3
Track Gauge	3.43 ft	3.94 ft	4.11 ft	4.11 ft	4.73 ft	5.12 ft
Crawler Length	5.11 ft	6.17 ft	6.4 ft	6.91 ft	6.91 ft	8.27 ft
Boom Swing Angle Lh	70 degrees	75 degrees	85 degrees	80 degrees	75 degrees	85 degrees
Boom Swing Angle Rh	50 degrees	50 degrees	50 degrees	50 degrees	55 degrees	50 degrees
Bucket Offset Lh	1.53 ft	1.68 ft	1.91 ft	1.91 ft	1.91 ft	2.07 ft
Bucket Offset Rh	2.58 ft	2.5 ft	2.78 ft	2.78 ft	2.53 ft	2.89 ft
Overall Length	11.98 ft	12.31 ft	8.27 ft	14.97 ft	15.84 ft	18.21 ft
Overall Height	7.91 ft	8.27 ft	8.27 ft	8.27 ft	8.27 ft	8.37 ft
Overall Width	4.2 ft	4.76 ft	5.09 ft	5.09 ft	5.71 ft	6.44 ft

Specification	PC18MR-3	PC27MR-3	PC30MR-3	PC35MR-3	PC55MR-3
Track Shoe Width	0.76 ft	0.99 ft	0.99 ft	0.99 ft	1.32 ft

Specification	PC55MR-3
Width To Outside Of Tracks	6.44 ft
Height To Top Of Cab	8.37 ft

Undercarriage
Specification	PC18MR-3	PC20MR-3	PC27MR-3	PC30MR-3	PC35MR-3	PC55MR-3
Number Of Shoes Per Side	35	39	40	44	44 (steel)	39 (steel)
Adjustment Of The Track Tension	Grease	Grease	Grease	Grease	Grease	Grease

Specification	PC18MR-3	PC35MR-3
Max Drawbar Pull	3,748 lb	7,496 lb

Specification	PC18MR-3	PC20MR-3	PC27MR-3	PC30MR-3	PC35MR-3	PC55MR-3	PC55MR-3
Number Of Track Rollers Per Side	3	3	4	4	4	4	4

Specification	PC27MR-3	PC30MR-3	PC35MR-3	PC55MR-3	PC55MR-3
Number Of Carrier Rollers Per Side	1	1	1	1	1

Specification	PC55MR-3
Shoe Size	15.75 in
Drawbar Pull	8,770 lb
Ground Pressure	4.41 psi
Max Travel Speed	2.86 mph

Electrical System
Specification	PC18MR-3	PC20MR-3	PC27MR-3	PC30MR-3	PC35MR-3	PC55MR-3
Starter	1.2 kW	1.4 kW	2.3 kW	2.3 kW	2.3 kW	2.3 kW
Operation Voltage	12 V	12 V	12 V	12 V	12 V	12 V
Battery	41 Ah	45 Ah	58 Ah	58 Ah	58 Ah	72 Ah
Alternator	40 A	40 A	40 A	40 A	40 A	40 A

Engine
Specification	PC18MR-3	PC20MR-3	PC27MR-3	PC30MR-3	PC35MR-3	PC55MR-3
Flywheel Horsepower	15.1 hp	20.8 hp	25.8 hp	28.7 hp	28.7 hp	38.3 hp
Piston Displacement	47.5 cu in	68.1 cu in	81.2 cu in	100.3 cu in	100.3 cu in	133.6 cu in
Engine Type	Swirl chamber	Swirl chamber	Direct injection	Direct injection	Direct injection	Direct injection

Specification	PC18MR-3	PC30MR-3	PC35MR-3	PC55MR-3
Number Of Cylinders	3	3	3	4
Fan Drive Type	Mechanical	Mechanical	Mechanical	Mechanical

Specification	PC18MR-3	PC20MR-3	PC27MR-3	PC30MR-3	PC35MR-3	PC55MR-3	PC55MR-3
Engine Model	Komatsu 3D67E-2	Komatsu 3D76E-6	Komatsu 3D82AE-6	Komatsu 3D88E-6	Komatsu 3D88E–6	Komatsu 4D88E–6	4D88E-6

Specification	PC18MR-3	PC20MR-3	PC27MR-3	PC30MR-3	PC35MR-3	PC55MR-3	PC55MR-3
Power Measured @	2,600 rpm	2,500 rpm	2,600 rpm	2,400 rpm	2,400 rpm	2,400 rpm	2,400 rpm

Specification	PC55MR-3
Net Power	38.2 hp
Displacement	134 cu in

Capacities
Specification	PC18MR-3	PC20MR-3	PC27MR-3	PC30MR-3	PC35MR-3	PC55MR-3
Fuel Tank	5.1 gal	7.4 gal	11.7 gal	11.7 gal	11.7 gal	17.2 gal
Hydraulic Tank	4.1 gal	5.1 gal	3.7 gal	3.7 gal	3.7 gal	5.3 gal
Engine Oil	0.9 gal	0.9 gal	1.4 gal	1.8 gal	1.8 gal	2 gal
Coolant	0.9 gal	0.8 gal	0.9 gal	0.9 gal	0.9 gal	2.3 gal

Operational
Specification	PC18MR-3	PC30MR-3	PC55MR-3
Boom Size	5.8 ft	7.5 ft	9.6 ft
Boom Type	Standard	Standard	Standard
Arm Size	3.2 ft	4.1 ft	5.4 ft
Bucket Crowd Force – ISO	1620 kgf	3000 kgf	3980 kgf
Arm Type	Standard	Standard	Standard

Specification	PC18MR-3	PC30MR-3	PC35MR-3	PC55MR-3
Arm Crowd Force – ISO	1010 kgf	1800 kgf	2100 kgf	2440 kgf
Digging Reach – Maximum	13.3 ft	16.6 ft	17.4 ft	20.5 ft
Maximum Reach @ Ground Level	13 ft	16.2 ft	17 ft	20 ft
Swing Radius	2.4 ft	2.9 ft	3.2 ft	3.5 ft
Bucket Size – Kga Standard Gp	0.1 yd3	0.1 yd3	0.1 yd3	0.2 yd3
Digging Depth – Maximum	7.1 ft	9.1 ft	10.3 ft	12.5 ft

Specification	PC55MR-3
Operating Weight	11,376 lb
Fuel Capacity	17.2 gal
Cooling System Fluid Capacity	2.3 gal
Hydraulic System Fluid Capacity	5.3 gal
Engine Oil Capacity	2 gal
Operational Voltage	12 V
Alternator Supplied Amperage	40 amps
Hydraulic System Relief Valve Pressure	3,840 psi
Hydraulic Pump Flow Capacity	37.2 gpm

Performance
Specification	PC18MR-3	PC20MR-3	PC27MR-3	PC30MR-3	PC35MR-3	PC55MR-3
Travel Speed (Maximum)	2.7 mph	2.9 mph	3 mph	2.9 mph	3 mph	2.9 mph
Travel Speed (Minimum)	1.5 mph	1.8 mph	1.7 mph	1.7 mph	1.8 mph	1.8 mph
Swing Speed	8.9 rpm	8.9 rpm	9.2 rpm	9.3 rpm	9 rpm	9 rpm
Ground Pressure	4.6 psi	3.9 psi	4.6 psi	4.3 psi	5.1 psi	4.1 psi
Maximum Traction Force	3,748 lb	4,542 lb	7,055 lb	7,496 lb	7,496 lb	9,436 lb
Gradeability	30 degrees	30 degrees	30 degrees	30 degrees	30 degrees	30 degrees
Bucket Digging Force (ISO)	3,572 lb	4,233 lb	4,916 lb	6,614 lb	6,724 lb	8,774 lb
Arm Crowd Force (ISO)	2,227 lb	3,065 lb	3,307 lb	3,968 lb	4,630 lb	5,379 lb

Weights
Specification	PC18MR-3	PC20MR-3	PC27MR-3	PC30MR-3	PC35MR-3	PC55MR-3
Operating Weight	3,924 lb	4,762 lb	6,371 lb	6,923 lb	7,893 lb	11,376 lb

Hydraulic System
Specification	PC18MR-3	PC20MR-3	PC27MR-3	PC30MR-3	PC35MR-3	PC55MR-3
Type Of Hydraulic Pump	Variable capacity x 1 gear x 1	Variable capacity x 1 gear x 1	Variable capacity x 1 gear x 1	Variable capacity x 1 gear x 1	Variable capacity x 2 gear x 1	Variable capacity x 2 gear x 1
Maximum Oil Flow	41.6 x 1 + 12.7 11.0 x 1 + 3.4	53.4 x 1 + 15.5 14.1 x 1 + 4.1	70.6 x 1 + 21.4 18.7 x 1 + 5.7	69.8 x 1 + 19.8 18.4 x 1 + 5.2	36.1x2+19.8 9.5x+5.2	53.5 x 2 + 33.8 14.1 x 2 + 8.9
Hydraulic Motor (Travel)	Variable capacity x 2	Variable capacity x 2	Variable capacity x 2	Variable capacity x 2	Variable capacity x 2	Variable capacity x 2
Hydraulic Motor (Swing)	fixed capacity x 1	fixed capacity x 1	fixed capacity x 1	fixed capacity x 1	fixed capacity x 1	fixed capacity x 1
Maximum Pressure Setting	3,340 psi	3,560 psi	3,560 psi	3,770 psi	3,770 psi	3,840 psi
Auxiliary Hydraulic Flow	9.3 gpm	9.3 gpm	13.3 gpm	18.5 gpm	18.5 gpm	18.5 gpm

Blade
Specification	PC18MR-3	PC20MR-3	PC27MR-3	PC30MR-3	PC35MR-3	PC55MR-3
Blade Width	990 or 1280 mm	4.8 ft	5.1 ft	5.1 ft	5.8 ft	6.5 ft
Blade Height	9.9 in	11.9 in	14 in	14 in	14 in	14 in

Drive System
Specification	PC18MR-3	PC20MR-3	PC27MR-3	PC30MR-3	PC35MR-3	PC55MR-3
Drive Method	Hydrostatic	Hydrostatic	Hydrostatic	Hydrostatic	Hydrostatic	Hydrostatic
Type Of Travel Brake	Hydraulic lock type	Hydraulic lock type	Hydraulic lock type	Hydraulic lock type	Hydraulic lock type	Hydraulic lock type
Type Of Travel Shoe	Rubber	Rubber	Rubber	Rubber	Rubber	Rubber

Boom/Stick Option (Hex) 1
Specification	PC55MR-3
Shipping Length Of Unit	18.21 ft
Shipping Height Of Unit	8.37 ft
Max Cutting Height	19.51 ft
Max Loading Height	13.88 ft
Max Reach Along Ground	19.92 ft
Max Vertical Wall Digging Depth	9.91 ft
Max Digging Depth	12.47 ft
Boom/Stick Option (Hex) 1	Arm 1640mm 5\'4\"

Swing Mechanism

Variants — Source comparison annotation
Source guide	Differing-field count reported
PC18MR-3 to PC55MR-3	89

What changes	PC18MR-3	PC20MR-3	PC27MR-3	PC30MR-3	PC35MR-3	PC55MR-3	PC55MR-3
Tail Swing Radius	2.35 ft	2.65 ft	2.81 ft	2.81 ft	3.12 ft	3.48 ft	3.48 ft

What changes	PC18MR-3	PC20MR-3	PC27MR-3	PC30MR-3	PC35MR-3	PC55MR-3	PC55MR-3
Number Of Track Rollers Per Side	3	3	4	4	4	4	4

What changes	PC18MR-3	PC20MR-3	PC27MR-3	PC30MR-3	PC35MR-3	PC55MR-3	PC55MR-3
Engine Model	Komatsu 3D67E-2	Komatsu 3D76E-6	Komatsu 3D82AE-6	Komatsu 3D88E-6	Komatsu 3D88E–6	Komatsu 4D88E–6	4D88E-6

What changes	PC18MR-3	PC20MR-3	PC27MR-3	PC30MR-3	PC35MR-3	PC55MR-3	PC55MR-3
Power Measured @	2,600 rpm	2,500 rpm	2,600 rpm	2,400 rpm	2,400 rpm	2,400 rpm	2,400 rpm

What changes	PC27MR-3	PC30MR-3	PC35MR-3	PC55MR-3	PC55MR-3
Number Of Carrier Rollers Per Side	1	1	1	1	1

Ratios
Figure	PC55MR-3
Engine horsepower per 1,000 lb of weight	3.4
Fuel tank per engine horsepower	0.45 gal
Hydraulic power from the listed pump flow and relief pressure	83.3 hp

Komatsu PC18MR-3 to PC55MR-3: excavator

PC18MR-3 to PC55MR-3: owner reports

Sources: 3 forum discussions about the Komatsu PC27R-8 mini excavators; heavyequipmentforums.com.

Komatsu: Overheating and hydraulics.

Sources: 3 forum discussions about the Komatsu PC35 mini excavators (PC35MR-2, PC35MR-3); heavyequipmentforums.com.

Komatsu: Slow hydraulics and functions that fail when cold or hot.

PC18MR-3 to PC55MR-3: forum references — Forum-title search
Forum index	Equipment class queried	Names in the search	Matching titles
Heavy Equipment Forums	excavator	Komatsu and the PC20MR, PC27MR line that the PC18MR-3, PC20MR-3, PC27MR-3, PC30MR-3 belongs to (no title names the exact model)	12

Topics named by those titles
Title topic	Titles
hydraulics	3

Topic in the title	Threads	Share of matching threads
hydraulics	3	25%

Injection Pump For Pc30mr 3 (Heavy Equipment Forums, 2026-08-21)
Komatsu Pc35 Mr3 Boom Lift Issues (Heavy Equipment Forums, 2025-07-14)
Komatsu Pc35 Mr 3 2014 Unknown Buttons (Heavy Equipment Forums, 2024-11-28)
Komatsu Pc18mr 3 Year Of Manufacture (Heavy Equipment Forums, 2024-11-26)

Used market for the PC18MR-3 to PC55MR-3 — Dated first-page listing snapshot
Observation date	Listing source	Equipment search	Listings
2026-09-24	MachineryTrader	Komatsu excavator	30

Model	Listed	Model years	Lowest asking	Highest asking	Median asking	Median hours
PC18MR-3	5	2015 to 2026	$9,148	$25,817	$20,759	1,600
PC30MR-3	5	2013 to 2024	$9,600	$33,021	$16,000	3,412
PC35MR-3	8	2010 to 2024	$9,500	$28,500	$14,000	None shown
PC55MR-3	12	2008 to 2022	$9,900	$31,315	$13,000	5,468

PC18MR-3 to PC55MR-3: 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 excavator PC18MR-3, PC20MR-3, PC27MR-3, PC30MR-3	No matching recall in this search

Sources for this page
Evidence class	Document, classification and recorded date
Reference site	Reference site: Komatsu PC18MR-3 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu PC20MR-3 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu PC27MR-3 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu PC30MR-3 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu PC35MR-3 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu PC55MR-3 — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu PC55MR-3 — RitchieSpecs. Observed 2026-09-24.
Forum threads	Forum threads: Heavy Equipment Forums thread index for Komatsu PC18MR-3 to PC55MR-3 — Heavy Equipment Forums. Observed 2026-09-24.
Forum threads	Forum threads: Forum threads read for the Komatsu PC27R-8 mini excavators — Heavyequipmentforums. Observed 2026-09-24.
Used-market listings	Used-market listings: MachineryTrader listings for Komatsu PC18MR-3 — 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 PC18MR-3 to PC55MR-3: Configuration records

PC18MR-3

Specification	Source figure
Dimensions and weight
Tail Swing Radius	2.35 ft
Track Shoe Width	0.76 ft
Crawler Length	5.11 ft
Boom Swing Angle Lh	70 degrees
Boom Swing Angle Rh	50 degrees
Bucket Offset Lh	1.53 ft
Bucket Offset Rh	2.58 ft
Overall Length	11.98 ft
Overall Height	7.91 ft
Overall Width	4.2 ft
Undercarriage
Number Of Shoes Per Side	35
Max Drawbar Pull	3,748 lb
Adjustment Of The Track Tension	Grease
Number Of Track Rollers Per Side	3
Electrical System
Starter	1.2 kW
Operation Voltage	12 V
Battery	41 Ah
Alternator	40 A
Engine
Flywheel Horsepower	15.1 hp
Number Of Cylinders	3
Piston Displacement	47.5 cu in
Engine Model	Komatsu 3D67E-2
Engine Type	Swirl chamber
Power Measured @	2,600 rpm
Fan Drive Type	Mechanical
Capacities
Fuel Tank	5.1 gal
Hydraulic Tank	4.1 gal
Engine Oil	0.9 gal
Coolant	0.9 gal
Operational
Boom Size	5.8 ft
Boom Type	Standard
Arm Size	3.2 ft
Arm Crowd Force – ISO	1010 kgf
Digging Reach – Maximum	13.3 ft
Maximum Reach @ Ground Level	13 ft
Bucket Crowd Force – ISO	1620 kgf
Swing Radius	2.4 ft
Bucket Size – Kga Standard Gp	0.1 yd3
Digging Depth – Maximum	7.1 ft
Arm Type	Standard
Performance
Travel Speed (Maximum)	2.7 mph
Travel Speed (Minimum)	1.5 mph
Maximum Traction Force	3,748 lb
Gradeability	30 degrees
Bucket Digging Force (ISO)	3,572 lb
Arm Crowd Force (ISO)	2,227 lb
Hydraulic System
Type Of Hydraulic Pump	Variable capacity x 1 gear x 1
Maximum Oil Flow	41.6 x 1 + 12.7 11.0 x 1 + 3.4
Hydraulic Motor (Travel)	Variable capacity x 2
Hydraulic Motor (Swing)	fixed capacity x 1
Maximum Pressure Setting	3,340 psi
Auxiliary Hydraulic Flow	9.3 gpm
Blade
Blade Width	990 or 1280 mm
Blade Height	9.9 in
Drive System
Drive Method	Hydrostatic
Type Of Travel Brake	Hydraulic lock type
Type Of Travel Shoe	Rubber
Additional specifications
Track Gauge	3.43 ft
Swing Speed	8.9 rpm
Ground Pressure	4.6 psi
Operating Weight	3,924 lb

Source

PC20MR-3

Specification	Source figure
Dimensions and weight
Tail Swing Radius	2.65 ft
Crawler Length	6.17 ft
Boom Swing Angle Lh	75 degrees
Boom Swing Angle Rh	50 degrees
Bucket Offset Lh	1.68 ft
Bucket Offset Rh	2.5 ft
Overall Length	12.31 ft
Overall Height	8.27 ft
Overall Width	4.76 ft
Undercarriage
Number Of Shoes Per Side	39
Adjustment Of The Track Tension	Grease
Number Of Track Rollers Per Side	3
Electrical System
Starter	1.4 kW
Operation Voltage	12 V
Battery	45 Ah
Alternator	40 A
Engine
Flywheel Horsepower	20.8 hp
Piston Displacement	68.1 cu in
Engine Model	Komatsu 3D76E-6
Engine Type	Swirl chamber
Power Measured @	2,500 rpm
Capacities
Fuel Tank	7.4 gal
Hydraulic Tank	5.1 gal
Engine Oil	0.9 gal
Coolant	0.8 gal
Performance
Travel Speed (Maximum)	2.9 mph
Travel Speed (Minimum)	1.8 mph
Maximum Traction Force	4,542 lb
Gradeability	30 degrees
Bucket Digging Force (ISO)	4,233 lb
Arm Crowd Force (ISO)	3,065 lb
Hydraulic System
Type Of Hydraulic Pump	Variable capacity x 1 gear x 1
Maximum Oil Flow	53.4 x 1 + 15.5 14.1 x 1 + 4.1
Hydraulic Motor (Travel)	Variable capacity x 2
Hydraulic Motor (Swing)	fixed capacity x 1
Maximum Pressure Setting	3,560 psi
Auxiliary Hydraulic Flow	9.3 gpm
Blade
Blade Width	4.8 ft
Blade Height	11.9 in
Drive System
Drive Method	Hydrostatic
Type Of Travel Brake	Hydraulic lock type
Type Of Travel Shoe	Rubber
Additional specifications
Track Gauge	3.94 ft
Swing Speed	8.9 rpm
Ground Pressure	3.9 psi
Operating Weight	4,762 lb

Source

PC27MR-3

Specification	Source figure
Dimensions and weight
Tail Swing Radius	2.81 ft
Track Shoe Width	0.99 ft
Crawler Length	6.4 ft
Boom Swing Angle Lh	85 degrees
Boom Swing Angle Rh	50 degrees
Bucket Offset Lh	1.91 ft
Bucket Offset Rh	2.78 ft
Overall Length	8.27 ft
Overall Height	8.27 ft
Overall Width	5.09 ft
Undercarriage
Number Of Shoes Per Side	40
Adjustment Of The Track Tension	Grease
Number Of Track Rollers Per Side	4
Number Of Carrier Rollers Per Side	1
Electrical System
Starter	2.3 kW
Operation Voltage	12 V
Battery	58 Ah
Alternator	40 A
Engine
Flywheel Horsepower	25.8 hp
Piston Displacement	81.2 cu in
Engine Model	Komatsu 3D82AE-6
Engine Type	Direct injection
Power Measured @	2,600 rpm
Capacities
Fuel Tank	11.7 gal
Hydraulic Tank	3.7 gal
Engine Oil	1.4 gal
Coolant	0.9 gal
Performance
Travel Speed (Maximum)	3 mph
Travel Speed (Minimum)	1.7 mph
Maximum Traction Force	7,055 lb
Gradeability	30 degrees
Bucket Digging Force (ISO)	4,916 lb
Arm Crowd Force (ISO)	3,307 lb
Hydraulic System
Type Of Hydraulic Pump	Variable capacity x 1 gear x 1
Maximum Oil Flow	70.6 x 1 + 21.4 18.7 x 1 + 5.7
Hydraulic Motor (Travel)	Variable capacity x 2
Hydraulic Motor (Swing)	fixed capacity x 1
Maximum Pressure Setting	3,560 psi
Auxiliary Hydraulic Flow	13.3 gpm
Blade
Blade Width	5.1 ft
Blade Height	14 in
Drive System
Drive Method	Hydrostatic
Type Of Travel Brake	Hydraulic lock type
Type Of Travel Shoe	Rubber
Additional specifications
Track Gauge	4.11 ft
Swing Speed	9.2 rpm
Ground Pressure	4.6 psi
Operating Weight	6,371 lb

Source

PC30MR-3

Specification	Source figure
Dimensions and weight
Tail Swing Radius	2.81 ft
Track Shoe Width	0.99 ft
Crawler Length	6.91 ft
Boom Swing Angle Lh	80 degrees
Boom Swing Angle Rh	50 degrees
Bucket Offset Lh	1.91 ft
Bucket Offset Rh	2.78 ft
Overall Length	14.97 ft
Overall Height	8.27 ft
Overall Width	5.09 ft
Undercarriage
Number Of Shoes Per Side	44
Adjustment Of The Track Tension	Grease
Number Of Track Rollers Per Side	4
Number Of Carrier Rollers Per Side	1
Electrical System
Starter	2.3 kW
Operation Voltage	12 V
Battery	58 Ah
Alternator	40 A
Engine
Flywheel Horsepower	28.7 hp
Number Of Cylinders	3
Piston Displacement	100.3 cu in
Engine Model	Komatsu 3D88E-6
Engine Type	Direct injection
Power Measured @	2,400 rpm
Fan Drive Type	Mechanical
Capacities
Fuel Tank	11.7 gal
Hydraulic Tank	3.7 gal
Engine Oil	1.8 gal
Coolant	0.9 gal
Operational
Boom Size	7.5 ft
Boom Type	Standard
Arm Size	4.1 ft
Arm Crowd Force – ISO	1800 kgf
Digging Reach – Maximum	16.6 ft
Maximum Reach @ Ground Level	16.2 ft
Bucket Crowd Force – ISO	3000 kgf
Swing Radius	2.9 ft
Bucket Size – Kga Standard Gp	0.1 yd3
Digging Depth – Maximum	9.1 ft
Arm Type	Standard
Performance
Travel Speed (Maximum)	2.9 mph
Travel Speed (Minimum)	1.7 mph
Maximum Traction Force	7,496 lb
Gradeability	30 degrees
Bucket Digging Force (ISO)	6,614 lb
Arm Crowd Force (ISO)	3,968 lb
Hydraulic System
Type Of Hydraulic Pump	Variable capacity x 1 gear x 1
Maximum Oil Flow	69.8 x 1 + 19.8 18.4 x 1 + 5.2
Hydraulic Motor (Travel)	Variable capacity x 2
Hydraulic Motor (Swing)	fixed capacity x 1
Maximum Pressure Setting	3,770 psi
Auxiliary Hydraulic Flow	18.5 gpm
Blade
Blade Width	5.1 ft
Blade Height	14 in
Drive System
Drive Method	Hydrostatic
Type Of Travel Brake	Hydraulic lock type
Type Of Travel Shoe	Rubber
Additional specifications
Track Gauge	4.11 ft
Swing Speed	9.3 rpm
Ground Pressure	4.3 psi
Operating Weight	6,923 lb

Source

PC35MR-3

Specification	Source figure
Dimensions and weight
Tail Swing Radius	3.12 ft
Track Shoe Width	0.99 ft
Crawler Length	6.91 ft
Boom Swing Angle Lh	75 degrees
Boom Swing Angle Rh	55 degrees
Bucket Offset Lh	1.91 ft
Bucket Offset Rh	2.53 ft
Overall Length	15.84 ft
Overall Height	8.27 ft
Overall Width	5.71 ft
Undercarriage
Number Of Shoes Per Side	44 (steel)
Max Drawbar Pull	7,496 lb
Adjustment Of The Track Tension	Grease
Number Of Track Rollers Per Side	4
Number Of Carrier Rollers Per Side	1
Electrical System
Starter	2.3 kW
Operation Voltage	12 V
Battery	58 Ah
Alternator	40 A
Engine
Flywheel Horsepower	28.7 hp
Number Of Cylinders	3
Piston Displacement	100.3 cu in
Engine Model	Komatsu 3D88E–6
Engine Type	Direct injection
Power Measured @	2,400 rpm
Fan Drive Type	Mechanical
Capacities
Fuel Tank	11.7 gal
Hydraulic Tank	3.7 gal
Engine Oil	1.8 gal
Coolant	0.9 gal
Operational
Arm Crowd Force – ISO	2100 kgf
Digging Reach – Maximum	17.4 ft
Maximum Reach @ Ground Level	17 ft
Swing Radius	3.2 ft
Bucket Size – Kga Standard Gp	0.1 yd3
Digging Depth – Maximum	10.3 ft
Performance
Travel Speed (Maximum)	3 mph
Travel Speed (Minimum)	1.8 mph
Maximum Traction Force	7,496 lb
Gradeability	30 degrees
Bucket Digging Force (ISO)	6,724 lb
Arm Crowd Force (ISO)	4,630 lb
Hydraulic System
Type Of Hydraulic Pump	Variable capacity x 2 gear x 1
Maximum Oil Flow	36.1x2+19.8 9.5x+5.2
Hydraulic Motor (Travel)	Variable capacity x 2
Hydraulic Motor (Swing)	fixed capacity x 1
Maximum Pressure Setting	3,770 psi
Auxiliary Hydraulic Flow	18.5 gpm
Blade
Blade Width	5.8 ft
Blade Height	14 in
Drive System
Drive Method	Hydrostatic
Type Of Travel Brake	Hydraulic lock type
Type Of Travel Shoe	Rubber
Additional specifications
Track Gauge	4.73 ft
Swing Speed	9 rpm
Ground Pressure	5.1 psi
Operating Weight	7,893 lb

Source

PC55MR-3

Specification	Source figure
Dimensions and weight
Tail Swing Radius	3.48 ft
Track Shoe Width	1.32 ft
Crawler Length	8.27 ft
Boom Swing Angle Lh	85 degrees
Boom Swing Angle Rh	50 degrees
Bucket Offset Lh	2.07 ft
Bucket Offset Rh	2.89 ft
Overall Length	18.21 ft
Overall Height	8.37 ft
Overall Width	6.44 ft
Width To Outside Of Tracks	6.44 ft
Height To Top Of Cab	8.37 ft
Undercarriage
Number Of Shoes Per Side	39 (steel)
Adjustment Of The Track Tension	Grease
Number Of Track Rollers Per Side	4
Number Of Carrier Rollers Per Side	1
Shoe Size	15.75 in
Drawbar Pull	8,770 lb
Max Travel Speed	2.86 mph
Electrical System
Starter	2.3 kW
Operation Voltage	12 V
Battery	72 Ah
Alternator	40 A
Engine
Flywheel Horsepower	38.3 hp
Number Of Cylinders	4
Piston Displacement	133.6 cu in
Engine Model	Komatsu 4D88E–6
Engine Type	Direct injection
Power Measured @	2,400 rpm
Fan Drive Type	Mechanical
Net Power	38.2 hp
Displacement	134 cu in
Capacities
Fuel Tank	17.2 gal
Hydraulic Tank	5.3 gal
Engine Oil	2 gal
Coolant	2.3 gal
Operational
Boom Size	9.6 ft
Boom Type	Standard
Arm Size	5.4 ft
Arm Crowd Force – ISO	2440 kgf
Digging Reach – Maximum	20.5 ft
Maximum Reach @ Ground Level	20 ft
Bucket Crowd Force – ISO	3980 kgf
Swing Radius	3.5 ft
Bucket Size – Kga Standard Gp	0.2 yd3
Digging Depth – Maximum	12.5 ft
Arm Type	Standard
Fuel Capacity	17.2 gal
Cooling System Fluid Capacity	2.3 gal
Hydraulic System Fluid Capacity	5.3 gal
Engine Oil Capacity	2 gal
Operational Voltage	12 V
Alternator Supplied Amperage	40 amps
Hydraulic System Relief Valve Pressure	3,840 psi
Hydraulic Pump Flow Capacity	37.2 gpm
Performance
Travel Speed (Maximum)	2.9 mph
Travel Speed (Minimum)	1.8 mph
Maximum Traction Force	9,436 lb
Gradeability	30 degrees
Bucket Digging Force (ISO)	8,774 lb
Arm Crowd Force (ISO)	5,379 lb
Hydraulic System
Type Of Hydraulic Pump	Variable capacity x 2 gear x 1
Maximum Oil Flow	53.5 x 2 + 33.8 14.1 x 2 + 8.9
Hydraulic Motor (Travel)	Variable capacity x 2
Hydraulic Motor (Swing)	fixed capacity x 1
Maximum Pressure Setting	3,840 psi
Auxiliary Hydraulic Flow	18.5 gpm
Blade
Blade Width	6.5 ft
Blade Height	14 in
Drive System
Drive Method	Hydrostatic
Type Of Travel Brake	Hydraulic lock type
Type Of Travel Shoe	Rubber
Boom/Stick Option (Hex) 1
Shipping Length Of Unit	18.21 ft
Shipping Height Of Unit	8.37 ft
Max Cutting Height	19.51 ft
Max Loading Height	13.88 ft
Max Reach Along Ground	19.92 ft
Max Vertical Wall Digging Depth	9.91 ft
Max Digging Depth	12.47 ft
Additional specifications
Track Gauge	5.12 ft
Ground Pressure	4.41 psi
Operating Weight	11,376 lb
Swing Speed	9 rpm
Boom/Stick Option (Hex) 1	Arm 1640mm 5'4"

Compare Komatsu PC18MR-3, PC20MR-3, PC27MR-3, PC30MR-3, PC35MR-3, PC55MR-3, PC55MR-3

Dimensions and weight
Specification	PC18MR-3	PC20MR-3	PC27MR-3	PC30MR-3	PC35MR-3	PC55MR-3	PC55MR-3
Tail Swing Radius	2.35 ft	2.65 ft	2.81 ft	2.81 ft	3.12 ft	3.48 ft	3.48 ft

Undercarriage
Specification	PC18MR-3	PC20MR-3	PC27MR-3	PC30MR-3	PC35MR-3	PC55MR-3	PC55MR-3
Number Of Track Rollers Per Side	3	3	4	4	4	4	4

Engine
Specification	PC18MR-3	PC20MR-3	PC27MR-3	PC30MR-3	PC35MR-3	PC55MR-3	PC55MR-3
Power Measured @	2,600 rpm	2,500 rpm	2,600 rpm	2,400 rpm	2,400 rpm	2,400 rpm	2,400 rpm

More in Komatsu: PC30MRx, PC130-6, PC40-2.

Komatsu PC18MR-3 to PC55MR-3 specifications

Swing Mechanism

Komatsu PC18MR-3 to PC55MR-3: excavator

PC18MR-3 to PC55MR-3: owner reports

Sources for this page

Komatsu PC18MR-3 to PC55MR-3: Configuration records