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Hitachi EX300LC-3 to ZX350LCK specifications

Early ZAXIS operating weight and the EX300 parts-book boundary

The early ZX350 entries need both the full designation and the weight condition. Hitachi separates bare carrier mass from an equipped excavator's operating weight. Its ZX350LC technical column also differs from the ZX330LC column. The older EX300LC-3 and EX450H-5 remain separate generations in this comparison; their specifications are not replaced with later ZAXIS figures.

A basic-machine weight omits the digging front and service fluids

The original KS-E370S brochure identifies basic-machine weights with counterweight and shoes, excluding the front attachment and fluids. Its H and K operating-weight tables include specified fronts. The earlier LCH, K and LCK entries copied lighter basic figures into operating-weight cells.

Both conditions are now named separately below.

The K version adds demolition provisions such as its guarded overhead-window cab, reinforced linkage and attachment piping. The H version instead has its heavy-duty front and undercarriage equipment. Similar engine ratings do not make their equipped masses or protection packages interchangeable.

Original Hitachi KS-E370S,marked04.01: basic/operating weights, H/K arrangements and fluid exclusions

The technical book has a separate ZX350LC page

TO1HHE-01 lists ZX350LC and ZX350LCN apart from ZX330 and ZX330LC. The old ZX350LC weight matched the smaller-name column's basic weight. The correction uses the dedicated ZX350LC operating condition, and retains the rejected earlier entry instead of treating it as another equipped-machine option.

The book also separates ordinary rated output from H/P-mode output. Record the power setting when comparing a response under load; the higher setting cannot silently be assigned to the ordinary-speed condition.

Original KM-1HHE/TO1HHE-01,ppT1-1-1–T1-1-2: separate model columns and H/P output

Travel relief is not the implement setting

The brochure names separate implement, travel and power-boost pressures. The old maximum-pressure quantity belongs to travel. Its product with maximum pump flow is therefore a theoretical calculation, not demonstrated digging horsepower.

The regulator explanation in TO1HHE describes pump control under load; the independently listed maxima are not proof of simultaneous output at an attachment.

Original KS-E370S hydraulic specification: separate circuit pressures and two main pumpsTO1HHE pump-device section: flow regulation and delivery-pressure control

Order EX300LC-3 components by the applicable catalogue

P15L-E1-3 explicitly includes EX300LC-3 and gives a serial-number boundary on its cover. The EX300-3 engine catalogue is a different document, identifying the 6SD1-TPD installation. A shared engine family name does not replace the equipment catalogue's serial scope.

Keep the machine plate and engine plate with the order so a later engine installation is not mistaken for the original equipment configuration.

Original P15L-E1-3 equipment-components cover: EX300LC-3 and serial07001 onwardOriginal6SD1-TPD-5 engine catalogue: EX300-3 engine identity and ordering information
Hitachi weight conditions and retained rejected operating-weight entries
ModelEarlier operating-weight label and ratioConfirmed separate weight conditions
ZX350LC53,352 lb; earlier ratio 4.632,800 kg equipped; 25,200 kg basic; revised ratio 3.4; TO1HHE-01,T1-1-2;3.20marm; dedicatedZX350LC,notZX330LC Original manufacturer table
ZX350LCH55,998 lb; earlier ratio 4.433,400 kg equipped; 25,400 kg basic; revised ratio 3.4; KS-E370S;6.40mH-boom,3.20mH-arm,600mmreinforcedshoes Original manufacturer table
ZX350K56,659 lb; earlier ratio 4.433,500 kg equipped; 25,700 kg basic; revised ratio 3.3; KS-E370S;6.40mK-boom,3.20mK-arm,600mmreinforcedshoes Original manufacturer table
ZX350LCK57,982 lb; earlier ratio 4.334,100 kg equipped; 26,300 kg basic; revised ratio 3.3; KS-E370S;6.40mK-boom,3.20mK-arm,600mmreinforcedshoes Original manufacturer table
Entries in this reference
Listing-entry count
6
Short answer

Hitachi EX300LC-3 to ZX350LCK: full-size excavators.

Selected configuration figures
ConfigurationDocumented field and quantity
EX300LC-3
Net Power
208 hp
Operating Weight
68,100 lb
EX450H-5
Net Power
301 hp
Operating Weight
95,000 lb
ZX350K
Net Power
247 hp
Hydraulic Pump Flow Capacity
153.3 gpm
ZX350LC
Net Power
247 hp
Hydraulic Pump Flow Capacity
153.3 gpm
ZX350LCH
Net Power
247 hp
Hydraulic Pump Flow Capacity
153.3 gpm
ZX350LCK
Net Power
247 hp
Hydraulic Pump Flow Capacity
153.3 gpm
EX300LC-3 to ZX350LCK specification matrix — Listing labels reported by the source
Publisher nameSource guideListing-entry countLabels named by the source
HitachiEX300LC-3 to ZX350LCK6EX300LC-3, EX450H-5, ZX350K, ZX350LC, ZX350LCH, and ZX350LCK
Boom/Stick Option (Hex) 1
SpecificationEX300LC-3EX450H-5ZX350LC
Shipping Length Of Unit36.29 ft38.78 ft36.39 ft
Shipping Height Of Unit11.19 ft11.32 ft11.39 ft
Max Cutting Height32.32 ft35.93 ft32.39 ft
Max Loading Height22.35 ft24.74 ft22.41 ft
Max Reach Along Ground33.99 ft38.92 ft34.03 ft
Max Vertical Wall Digging Depth18.41 ft22.25 ft18.44 ft
Max Digging Depth22.45 ft25.89 ft22.48 ft
Boom/Stick Option (Hex) 1Boom 21\'0\" (6400mm) / Stick 8\'9\" (2660mm)Boom 23\'0\" (7000mm) / Stick 11\'2\" (3400mm)boom 6400 mm w/ stick 2660mm
Dimensions and weight
SpecificationEX300LC-3EX450H-5ZX350KZX350LCZX350LCHZX350LCK
Ground Clearance1.65 ft1.63 ft1.65 ft1.65 ft1.65 ft1.65 ft
Height To Top Of Cab9.88 ft10.86 ft10.24 ft10.24 ft10.24 ft10.24 ft
Width To Outside Of Tracks11.13 ft10.96 ft10.47 ft10.47 ft10.47 ft10.47 ft
Length Of Track On Ground13.16 ft13.29 ft12.24 ft12.24 ft12.24 ft12.24 ft
Tail Swing Radius10.83 ft11.39 ft10.9 ft10.9 ft10.9 ft10.9 ft
Removal Counterweight Clearance3.84 ft4.04 ft3.75 ft3.75 ft3.75 ft3.75 ft
Undercarriage
SpecificationEX300LC-3EX450H-5ZX350KZX350LCZX350LCHZX350LCK
Track Gauge8.5 ft8.99 ft8.5 ft8.5 ft8.5 ft8.5 ft
Shoe Size31.5 in23.63 in23.63 in23.63 in23.63 in23.63 in
Number Of Track Rollers Per Side989899
Number Of Carrier Rollers Per Side222222
Max Travel Speed3.42 mph3.42 mph3.42 mph3.42 mph3.42 mph3.42 mph
Ground Pressure6.4 psi11.7 psi9.14 psi9.14 psi9.14 psi9.14 psi
Number Of Shoes Per Side504748454848
Engine
SpecificationEX300LC-3EX450H-5ZX350KZX350LCZX350LCHZX350LCK
Number Of Cylinders666666
Engine ModelA-6SD1TQAA-6RB1TQAAA-6HK1XAA-6HK1XAA-6HK1XAA-6HK1X
Net Power208 hp301 hp247 hp247 hp247 hp247 hp
Power Measured @2,000 rpm2,000 rpm2,000 rpm2,000 rpm2,000 rpm2,000 rpm
Max Torque615.2 lb-ft907.3 lb-ft643.9 lb-ft643.9 lb-ft643.9 lb-ft643.9 lb-ft
AspirationTurbochargedTurbochargedturbocharged, intercooledturbocharged, intercooledturbocharged, intercooledturbocharged, intercooled
Displacement600 cu in838 cu in475.4 cu in475.4 cu in475.4 cu in475.4 cu in
Torque Measured @1,400 rpm1,400 rpm1,700 rpm1,700 rpm1,700 rpm1,700 rpm
Operational
SpecificationEX300LC-3EX450H-5ZX350KZX350LCZX350LCHZX350LCK
Operating Weight68,100 lb95,000 lb33,500 kg32,800 kg33,400 kg34,100 kg
Fuel Capacity134.8 gal159.9 gal148 gal148 gal148 gal148 gal
Cooling System Fluid Capacity8.9 gal11.9 gal9.3 gal9.3 gal9.3 gal9.3 gal
Hydraulic System Fluid Capacity81.9 gal137.4 gal84.6 gal84.6 gal84.6 gal84.6 gal
Engine Oil Capacity9.3 gal13.3 gal9.6 gal9.6 gal9.6 gal9.6 gal
Swing Drive Fluid Capacity4.5 gal4.4 gal4.4 gal4.4 gal4.4 gal4.4 gal
Alternator Supplied Amperage30 amps40 amps50 amps50 amps50 amps50 amps
Hydraulic System Relief Valve Pressure4,980 psi4,980 psi5,050 psi5,050 psi5,050 psi5,050 psi
Hydraulic Pump Flow Capacity144.3 gpm190.3 gpm153.3 gpm153.3 gpm153.3 gpm153.3 gpm
SpecificationZX350KZX350LCZX350LCHZX350LCK
Operating Voltage24 V24 V24 V24 V
Swing Mechanism
SpecificationEX300LC-3EX450H-5ZX350KZX350LCZX350LCHZX350LCK
Swing Speed12 rpm9 rpm11.8 rpm11.8 rpm11.8 rpm11.8 rpm
Buckets
SpecificationEX300LC-3EX450H-5ZX350KZX350LCZX350LCHZX350LCK
Reference Bucket Capacity1.9 yd32.4 yd32 yd31.9 yd32 yd32 yd3
Minimum Bucket Capacity1.6 yd31.8 yd31.9 yd31.2 yd31.2 yd31.9 yd3
Maximum Bucket Capacity2.5 yd33 yd32.2 yd32.2 yd32 yd32.2 yd3
Variants — Source comparison annotation
Source guideDiffering-field count reported
EX300LC-3 to ZX350LCK39
Ratios
FigureEX300LC-3EX450H-5ZX350KZX350LCZX350LCHZX350LCK
Engine horsepower per 1,000 lb of weight3.13.23.33.43.43.3
Fuel tank per engine horsepower0.65 gal0.53 gal0.60 gal0.60 gal0.60 gal0.60 gal
Hydraulic power from the listed pump flow and relief pressure419.3 hp552.9 hp451.7 hp451.7 hp451.7 hp451.7 hp

EX300LC-3 to ZX350LCK: owner reports

Sources: 3 forum discussions about the Hitachi EX300 excavators (EX300-1, EX300-3, EX300LC-3); heavyequipmentforums.com.Sources: 3 forum discussions about the Hitachi ZX350 excavators (ZX350-6, ZX350LC-5N, ZX350LCK-5G); heavyequipmentforums.com.
EX300LC-3 to ZX350LCK: forum references — Forum-title search
Forum indexEquipment class queriedNames in the searchMatching titles
Heavy Equipment Forumsfull-size excavatorHitachi and the EX450, ZX350 line that the EX300LC-3, EX450H-5, ZX350K, ZX350LC belongs to (no title names the exact model)43
Topics named by those titles
Title topicTitles
hydraulics12
Topic in the titleThreadsShare of matching threads
hydraulics1228%
EX300LC-3 to ZX350LCK: dated market and recall observations — Dated listing search
DateListing indexEquipment classNames queriedResult
2026-09-24MachineryTrader (machinerytrader.com)full-size excavatorEX300LC-3, EX450H-5, ZX350KNo matching offers in this snapshot
Dated CPSC search
DateDatabaseNames queriedResult
2026-09-24U.S. Consumer Product Safety CommissionHitachi; EX300LC-3, EX450H-5, ZX350KNo matching recall in the stated search

Sources for this page

Evidence classDocument, classification and recorded date
Reference site
Reference site
Reference site
Reference site
Reference site
Reference site
Forum threads
Forum threads
Federal agency data

Hitachi EX300LC-3 to ZX350LCK: Configuration records

EX300LC-3
SpecificationSource figure
Boom/Stick Option (Hex) 1
Shipping Length Of Unit36.29 ft
Shipping Height Of Unit11.19 ft
Max Cutting Height32.32 ft
Max Loading Height22.35 ft
Max Reach Along Ground33.99 ft
Max Vertical Wall Digging Depth18.41 ft
Max Digging Depth22.45 ft
Boom/Stick Option (Hex) 1Boom 21'0" (6400mm) / Stick 8'9" (2660mm)
Dimensions and weight
Ground Clearance1.65 ft
Height To Top Of Cab9.88 ft
Width To Outside Of Tracks11.13 ft
Length Of Track On Ground13.16 ft
Tail Swing Radius10.83 ft
Removal Counterweight Clearance3.84 ft
Undercarriage
Track Gauge8.5 ft
Shoe Size31.5 in
Number Of Track Rollers Per Side9
Number Of Carrier Rollers Per Side2
Max Travel Speed3.42 mph
Ground Pressure6.4 psi
Number Of Shoes Per Side50
Engine
Number Of Cylinders6
Engine ModelA-6SD1TQA
Net Power208 hp
Power Measured @2,000 rpm
Max Torque615.2 lb-ft
AspirationTurbocharged
Displacement600 cu in
Torque Measured @1,400 rpm
Operational
Operating Weight68,100 lb
Fuel Capacity134.8 gal
Cooling System Fluid Capacity8.9 gal
Hydraulic System Fluid Capacity81.9 gal
Engine Oil Capacity9.3 gal
Swing Drive Fluid Capacity4.5 gal
Alternator Supplied Amperage30 amps
Hydraulic System Relief Valve Pressure4,980 psi
Hydraulic Pump Flow Capacity144.3 gpm
Swing Mechanism
Swing Speed12 rpm
Buckets
Reference Bucket Capacity1.9 yd3
Minimum Bucket Capacity1.6 yd3
Maximum Bucket Capacity2.5 yd3

Source

EX450H-5
SpecificationSource figure
Boom/Stick Option (Hex) 1
Shipping Length Of Unit38.78 ft
Shipping Height Of Unit11.32 ft
Max Cutting Height35.93 ft
Max Loading Height24.74 ft
Max Reach Along Ground38.92 ft
Max Vertical Wall Digging Depth22.25 ft
Max Digging Depth25.89 ft
Boom/Stick Option (Hex) 1Boom 23'0" (7000mm) / Stick 11'2" (3400mm)
Dimensions and weight
Ground Clearance1.63 ft
Height To Top Of Cab10.86 ft
Width To Outside Of Tracks10.96 ft
Length Of Track On Ground13.29 ft
Tail Swing Radius11.39 ft
Removal Counterweight Clearance4.04 ft
Undercarriage
Track Gauge8.99 ft
Shoe Size23.63 in
Number Of Track Rollers Per Side8
Number Of Carrier Rollers Per Side2
Max Travel Speed3.42 mph
Ground Pressure11.7 psi
Number Of Shoes Per Side47
Engine
Number Of Cylinders6
Engine ModelA-6RB1TQA
Net Power301 hp
Power Measured @2,000 rpm
Max Torque907.3 lb-ft
AspirationTurbocharged
Displacement838 cu in
Torque Measured @1,400 rpm
Operational
Operating Weight95,000 lb
Fuel Capacity159.9 gal
Cooling System Fluid Capacity11.9 gal
Hydraulic System Fluid Capacity137.4 gal
Engine Oil Capacity13.3 gal
Swing Drive Fluid Capacity4.4 gal
Alternator Supplied Amperage40 amps
Hydraulic System Relief Valve Pressure4,980 psi
Hydraulic Pump Flow Capacity190.3 gpm
Swing Mechanism
Swing Speed9 rpm
Buckets
Reference Bucket Capacity2.4 yd3
Minimum Bucket Capacity1.8 yd3
Maximum Bucket Capacity3 yd3

Source

ZX350K
SpecificationSource figure
Dimensions and weight
Ground Clearance1.65 ft
Height To Top Of Cab10.24 ft
Width To Outside Of Tracks10.47 ft
Length Of Track On Ground12.24 ft
Tail Swing Radius10.9 ft
Removal Counterweight Clearance3.75 ft
Undercarriage
Track Gauge8.5 ft
Shoe Size23.63 in
Number Of Track Rollers Per Side9
Number Of Carrier Rollers Per Side2
Max Travel Speed3.42 mph
Ground Pressure9.14 psi
Number Of Shoes Per Side48
Engine
Number Of Cylinders6
Engine ModelAA-6HK1X
Net Power247 hp
Power Measured @2,000 rpm
Max Torque643.9 lb-ft
Aspirationturbocharged, intercooled
Displacement475.4 cu in
Torque Measured @1,700 rpm
Operational
Fuel Capacity148 gal
Cooling System Fluid Capacity9.3 gal
Hydraulic System Fluid Capacity84.6 gal
Engine Oil Capacity9.6 gal
Swing Drive Fluid Capacity4.4 gal
Alternator Supplied Amperage50 amps
Travel Circuit Relief Pressure — Implement31.4MPa;powerboost34.3MPa; travel34.8MPa5,050 psi [source]
Hydraulic Pump Flow Capacity153.3 gpm
Operating Voltage24 V
Equipped Operating Weight — KS-E370S;6.40mK-boom,3.20mK-arm,600mmreinforcedshoes33,500 kg [source]
Swing Mechanism
Swing Speed11.8 rpm
Buckets
Reference Bucket Capacity2 yd3
Minimum Bucket Capacity1.9 yd3
Maximum Bucket Capacity2.2 yd3
Additional specifications
Basic Machine Weight — Specified shoes/counterweight; excludes front attachment and fluids25,700 kg [source]
Implement Circuit Relief Pressure31.4 MPa (4,550 psi) [source]
Power Boost Pressure34.3 MPa (4,980 psi) [source]

Source

ZX350LC
SpecificationSource figure
Boom/Stick Option (Hex) 1
Shipping Length Of Unit36.39 ft
Shipping Height Of Unit11.39 ft
Max Cutting Height32.39 ft
Max Loading Height22.41 ft
Max Reach Along Ground34.03 ft
Max Vertical Wall Digging Depth18.44 ft
Max Digging Depth22.48 ft
Boom/Stick Option (Hex) 1boom 6400 mm w/ stick 2660mm
Dimensions and weight
Ground Clearance1.65 ft
Height To Top Of Cab10.24 ft
Width To Outside Of Tracks10.47 ft
Length Of Track On Ground12.24 ft
Tail Swing Radius10.9 ft
Removal Counterweight Clearance3.75 ft
Undercarriage
Track Gauge8.5 ft
Shoe Size23.63 in
Number Of Track Rollers Per Side8
Number Of Carrier Rollers Per Side2
Max Travel Speed3.42 mph
Ground Pressure9.14 psi
Number Of Shoes Per Side45
Engine
Number Of Cylinders6
Engine ModelAA-6HK1X
Net Power247 hp
Power Measured @2,000 rpm
Max Torque643.9 lb-ft
Aspirationturbocharged, intercooled
Displacement475.4 cu in
Torque Measured @1,700 rpm
Operational
Fuel Capacity148 gal
Cooling System Fluid Capacity9.3 gal
Hydraulic System Fluid Capacity84.6 gal
Engine Oil Capacity9.6 gal
Swing Drive Fluid Capacity4.4 gal
Alternator Supplied Amperage50 amps
Travel Circuit Relief Pressure — Implement31.4MPa;powerboost34.3MPa; travel34.8MPa5,050 psi [source]
Hydraulic Pump Flow Capacity153.3 gpm
Operating Voltage24 V
Equipped Operating Weight — TO1HHE-01,T1-1-2;3.20marm; dedicatedZX350LC,notZX330LC32,800 kg [source]
Swing Mechanism
Swing Speed11.8 rpm
Buckets
Reference Bucket Capacity1.9 yd3
Minimum Bucket Capacity1.2 yd3
Maximum Bucket Capacity2.2 yd3
Additional specifications
Basic Machine Weight — Specified shoes/counterweight; excludes front attachment and fluids25,200 kg [source]
Implement Circuit Relief Pressure31.4 MPa (4,550 psi) [source]
Power Boost Pressure34.3 MPa (4,980 psi) [source]

Source

ZX350LCH
SpecificationSource figure
Dimensions and weight
Ground Clearance1.65 ft
Height To Top Of Cab10.24 ft
Width To Outside Of Tracks10.47 ft
Length Of Track On Ground12.24 ft
Tail Swing Radius10.9 ft
Removal Counterweight Clearance3.75 ft
Undercarriage
Track Gauge8.5 ft
Shoe Size23.63 in
Number Of Track Rollers Per Side9
Number Of Carrier Rollers Per Side2
Max Travel Speed3.42 mph
Ground Pressure9.14 psi
Number Of Shoes Per Side48
Engine
Number Of Cylinders6
Engine ModelAA-6HK1X
Net Power247 hp
Power Measured @2,000 rpm
Max Torque643.9 lb-ft
Aspirationturbocharged, intercooled
Displacement475.4 cu in
Torque Measured @1,700 rpm
Operational
Fuel Capacity148 gal
Cooling System Fluid Capacity9.3 gal
Hydraulic System Fluid Capacity84.6 gal
Engine Oil Capacity9.6 gal
Swing Drive Fluid Capacity4.4 gal
Alternator Supplied Amperage50 amps
Travel Circuit Relief Pressure — Implement31.4MPa;powerboost34.3MPa; travel34.8MPa5,050 psi [source]
Hydraulic Pump Flow Capacity153.3 gpm
Operating Voltage24 V
Equipped Operating Weight — KS-E370S;6.40mH-boom,3.20mH-arm,600mmreinforcedshoes33,400 kg [source]
Swing Mechanism
Swing Speed11.8 rpm
Buckets
Reference Bucket Capacity2 yd3
Minimum Bucket Capacity1.2 yd3
Maximum Bucket Capacity2 yd3
Additional specifications
Basic Machine Weight — Specified shoes/counterweight; excludes front attachment and fluids25,400 kg [source]
Implement Circuit Relief Pressure31.4 MPa (4,550 psi) [source]
Power Boost Pressure34.3 MPa (4,980 psi) [source]

Source

ZX350LCK
SpecificationSource figure
Dimensions and weight
Ground Clearance1.65 ft
Height To Top Of Cab10.24 ft
Width To Outside Of Tracks10.47 ft
Length Of Track On Ground12.24 ft
Tail Swing Radius10.9 ft
Removal Counterweight Clearance3.75 ft
Undercarriage
Track Gauge8.5 ft
Shoe Size23.63 in
Number Of Track Rollers Per Side9
Number Of Carrier Rollers Per Side2
Max Travel Speed3.42 mph
Ground Pressure9.14 psi
Number Of Shoes Per Side48
Engine
Number Of Cylinders6
Engine ModelAA-6HK1X
Net Power247 hp
Power Measured @2,000 rpm
Max Torque643.9 lb-ft
Aspirationturbocharged, intercooled
Displacement475.4 cu in
Torque Measured @1,700 rpm
Operational
Fuel Capacity148 gal
Cooling System Fluid Capacity9.3 gal
Hydraulic System Fluid Capacity84.6 gal
Engine Oil Capacity9.6 gal
Swing Drive Fluid Capacity4.4 gal
Alternator Supplied Amperage50 amps
Travel Circuit Relief Pressure — Implement31.4MPa;powerboost34.3MPa; travel34.8MPa5,050 psi [source]
Hydraulic Pump Flow Capacity153.3 gpm
Operating Voltage24 V
Equipped Operating Weight — KS-E370S;6.40mK-boom,3.20mK-arm,600mmreinforcedshoes34,100 kg [source]
Swing Mechanism
Swing Speed11.8 rpm
Buckets
Reference Bucket Capacity2 yd3
Minimum Bucket Capacity1.9 yd3
Maximum Bucket Capacity2.2 yd3
Additional specifications
Basic Machine Weight — Specified shoes/counterweight; excludes front attachment and fluids26,300 kg [source]
Implement Circuit Relief Pressure31.4 MPa (4,550 psi) [source]
Power Boost Pressure34.3 MPa (4,980 psi) [source]

Source

More in Hitachi: ZX300LC-6–ZX470LC-6: hydraulic editions/fronts/track geometry, EX300-5–EX370HD-5: rock equipment/modes/drift, EX400-5–ZX480MT.