Machine models

Komatsu H135S to H285S specifications

Entries in this reference
Listing-entry count
3

Short answer

Komatsu H135S to H285S: full-size excavators.

Selected configuration figures
Configuration	Documented field and quantity
H135S	Gross Power 728.2 hp Operating Weight 308,647 lb
H255S	Gross Power 1,207 hp Operating Weight 529,110 lb
H285S	Gross Power 1,583 hp Operating Weight 738,549 lb

H135S to H285S specification matrix — Listing labels reported by the source
Publisher name	Source guide	Listing-entry count	Labels named by the source
Komatsu	H135S to H285S	3	H135S, H255S, and H285S

Boom/Stick Option (Hex) 1
Specification	H135S	H255S	H285S
Shipping Length Of Unit	46.26 ft	54.14 ft	59.06 ft
Shipping Height Of Unit	25.27 ft	29.86 ft	33.47 ft
Max Cutting Height	48.23 ft	48.23 ft	52.83 ft
Max Loading Height	32.16 ft	31.17 ft	34.13 ft
Max Reach Along Ground	45.94 ft	49.55 ft	55.78 ft
Max Vertical Wall Digging Depth	9.85 ft	6.57 ft	6.57 ft
Max Digging Depth	26.91 ft	28.55 ft	28.88 ft
Boom/Stick Option (Hex) 1	Boom 26'3" (8000mm)/Stick 11'0" (3600mm)	Boom 26'9" (8150mm)/Stick 13'11" (4250mm)	Boom 30'10" (9400mm)/Stick 14'9" (4500mm)

Dimensions and weight
Specification	H135S	H255S	H285S
Ground Clearance	2.55 ft	2.93 ft	3.15 ft
Height To Top Of Cab	20.45 ft	25.81 ft	25.63 ft
Width To Outside Of Tracks	16.77 ft	18.38 ft	21.17 ft
Length Of Track On Ground	16.02 ft	19.69 ft	20.49 ft
Tail Swing Radius	16.21 ft	21.25 ft	21.43 ft
Removal Counterweight Clearance	6.32 ft	9.19 ft	9.8 ft

Undercarriage
Specification	H135S	H255S	H285S
Track Gauge	13.95 ft	15.75 ft	17.23 ft
Shoe Size	23.63 in	31.5 in	47.25 in
Max Travel Speed	1.5 mph	1.5 mph	1.25 mph
Ground Pressure	29.3 psi	32 psi	28 psi

Engine
Specification	H135S	H255S	H285S
Number Of Cylinders	12	12	16
Engine Model	VTA28-C-800	K1500E	K2000E
Gross Power	728.2 hp	1,207 hp	1,583 hp
Power Measured @	1,800 rpm	1,800 rpm	1,800 rpm
Displacement	1,709 cu in	2,288 cu in	3,070 cu in

Operational
Specification	H135S	H255S	H285S
Operating Weight	308,647 lb	529,110 lb	738,549 lb
Fuel Capacity	475.6 gal	977.5 gal	1,207 gal
Hydraulic System Fluid Capacity	425.4 gal	766.1 gal	782 gal
Hydraulic System Relief Valve Pressure	4,495 psi	4,495 psi	4,495 psi
Hydraulic Pump Flow Capacity	435.9 gpm	713.3 gpm	951.1 gpm

Swing Mechanism
Specification	H135S	H255S	H285S
Swing Speed	6.2 rpm	4.6 rpm	3.3 rpm

Variants — Source comparison annotation
Source guide	Differing-field count reported
H135S to H285S	27

Ratios
Figure	H135S	H255S	H285S
Engine horsepower per 1,000 lb of weight	2.4	2.3	2.1
Fuel tank per engine horsepower	0.65 gal	0.81 gal	0.76 gal
Hydraulic power from the listed pump flow and relief pressure	1,143.2 hp	1,870.6 hp	2,494.3 hp

H135S to H285S: forum references

Dated forum-index scope
Forum index	Exact-model query	Exact-model title matches	Broader equipment query	Broader title matches
Heavy Equipment Forums	Komatsu full-size excavator	0	Komatsu full-size excavators	9

H135S to H285S: dated market and recall observations — Dated listing search
Date	Listing index	Equipment class	Names queried	Result
2026-09-24	MachineryTrader (machinerytrader.com)	full-size excavator	H135S, H255S, H285S	No matching offers in this snapshot

Dated CPSC search
Date	Database	Names queried	Result
2026-09-24	U.S. Consumer Product Safety Commission	Komatsu; H135S, H255S, H285S	No matching recall in the stated search

Sources for this page
Evidence class	Document, classification and recorded date
Reference site	Reference site: Komatsu H135S — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu H255S — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Komatsu H285S — RitchieSpecs. Observed 2026-09-24.
Forum threads	Forum threads: Heavy Equipment Forums thread index for Komatsu H135S to H285S — Heavy Equipment Forums. 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.

H135S

Specification	Source figure
Boom/Stick Option (Hex) 1
Shipping Length Of Unit	46.26 ft
Shipping Height Of Unit	25.27 ft
Max Cutting Height	48.23 ft
Max Loading Height	32.16 ft
Max Reach Along Ground	45.94 ft
Max Vertical Wall Digging Depth	9.85 ft
Max Digging Depth	26.91 ft
Boom/Stick Option (Hex) 1	Boom 26'3" (8000mm)/Stick 11'0" (3600mm)
Dimensions and weight
Ground Clearance	2.55 ft
Height To Top Of Cab	20.45 ft
Width To Outside Of Tracks	16.77 ft
Length Of Track On Ground	16.02 ft
Tail Swing Radius	16.21 ft
Removal Counterweight Clearance	6.32 ft
Undercarriage
Track Gauge	13.95 ft
Shoe Size	23.63 in
Max Travel Speed	1.5 mph
Ground Pressure	29.3 psi
Engine
Number Of Cylinders	12
Engine Model	VTA28-C-800
Gross Power	728.2 hp
Power Measured @	1,800 rpm
Displacement	1,709 cu in
Operational
Operating Weight	308,647 lb
Fuel Capacity	475.6 gal
Hydraulic System Fluid Capacity	425.4 gal
Hydraulic System Relief Valve Pressure	4,495 psi
Hydraulic Pump Flow Capacity	435.9 gpm
Swing Mechanism
Swing Speed	6.2 rpm

H255S

Specification	Source figure
Boom/Stick Option (Hex) 1
Shipping Length Of Unit	54.14 ft
Shipping Height Of Unit	29.86 ft
Max Cutting Height	48.23 ft
Max Loading Height	31.17 ft
Max Reach Along Ground	49.55 ft
Max Vertical Wall Digging Depth	6.57 ft
Max Digging Depth	28.55 ft
Boom/Stick Option (Hex) 1	Boom 26'9" (8150mm)/Stick 13'11" (4250mm)
Dimensions and weight
Ground Clearance	2.93 ft
Height To Top Of Cab	25.81 ft
Width To Outside Of Tracks	18.38 ft
Length Of Track On Ground	19.69 ft
Tail Swing Radius	21.25 ft
Removal Counterweight Clearance	9.19 ft
Undercarriage
Track Gauge	15.75 ft
Shoe Size	31.5 in
Max Travel Speed	1.5 mph
Ground Pressure	32 psi
Engine
Number Of Cylinders	12
Engine Model	K1500E
Gross Power	1,207 hp
Power Measured @	1,800 rpm
Displacement	2,288 cu in
Operational
Operating Weight	529,110 lb
Fuel Capacity	977.5 gal
Hydraulic System Fluid Capacity	766.1 gal
Hydraulic System Relief Valve Pressure	4,495 psi
Hydraulic Pump Flow Capacity	713.3 gpm
Swing Mechanism
Swing Speed	4.6 rpm

H285S

Specification	Source figure
Boom/Stick Option (Hex) 1
Shipping Length Of Unit	59.06 ft
Shipping Height Of Unit	33.47 ft
Max Cutting Height	52.83 ft
Max Loading Height	34.13 ft
Max Reach Along Ground	55.78 ft
Max Vertical Wall Digging Depth	6.57 ft
Max Digging Depth	28.88 ft
Boom/Stick Option (Hex) 1	Boom 30'10" (9400mm)/Stick 14'9" (4500mm)
Dimensions and weight
Ground Clearance	3.15 ft
Height To Top Of Cab	25.63 ft
Width To Outside Of Tracks	21.17 ft
Length Of Track On Ground	20.49 ft
Tail Swing Radius	21.43 ft
Removal Counterweight Clearance	9.8 ft
Undercarriage
Track Gauge	17.23 ft
Shoe Size	47.25 in
Max Travel Speed	1.25 mph
Ground Pressure	28 psi
Engine
Number Of Cylinders	16
Engine Model	K2000E
Gross Power	1,583 hp
Power Measured @	1,800 rpm
Displacement	3,070 cu in
Operational
Operating Weight	738,549 lb
Fuel Capacity	1,207 gal
Hydraulic System Fluid Capacity	782 gal
Hydraulic System Relief Valve Pressure	4,495 psi
Hydraulic Pump Flow Capacity	951.1 gpm
Swing Mechanism
Swing Speed	3.3 rpm