The Tool Desk
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Hitachi ZX excavator model numbers identify the ZAXIS excavator family, an approximate size class, machine configuration, and generation or market series. The number is not an exact operating weight, and the letters only make sense in their position: for example, the H in ZX350H-7G indicates a heavier-duty configuration, while the H in ZX350LC-7H belongs to the series name. To choose between machines, use the full model code, market and build-specific specification—not the badge alone.
How do I read a Hitachi ZX excavator model number?
Read the code from left to right, but treat it as a set of slots rather than a universal abbreviation. The same letter can mean something different depending on whether it appears before or after the hyphen. Hitachi’s published brochures cover different markets and product series; the cited brochures do not establish one global key for every suffix.
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Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →- ZX identifies the ZAXIS hydraulic excavator family. It is not Hitachi’s entire earthmoving lineup: older Hitachi mining shovels use EX codes, while wheel loaders use ZW.
- The digits indicate an approximate size class. Dividing by 10 gives a rough weight in metric tonnes, not a guaranteed operating weight or a legal transport weight.
- Letters before the hyphen describe a configuration, such as carriage, tail swing, duty package or carrier type. Documented examples include LC, US, USLC, USB, U, H and W.
- The hyphen and following number indicate a generation designation, such as -5, -6 or -7.
- A letter after that number identifies a series or market version in the documents here: examples include -5A, -5G, -5N, -6A, -7G and -7H. Do not confuse a trailing series letter with the same letter in the pre-hyphen configuration slot.
- An application label may appear beside the model code rather than inside it. SLF, for example, means Super Long Front; an SLF machine can retain the base model code ZX210LC-7H.
For example, ZX350LC-7H means a ZAXIS excavator in the approximate 350 class, with a long carriage (LC), in the 7H series. The H here is not the heavy-duty H in ZX350H-7G. In that second code, H sits before the hyphen and identifies the duty configuration; G is the trailing series letter used in the Europe and Indonesia documents cited here.
Likewise, ZX245USLC-7H combines the approximate 245 class, reduced-tail-swing US configuration and long carriage. ZX17U-5N is a compact-family model in the approximate 17 class, with U in the configuration slot and N after the generation number. That trailing N is not the same code as LCN on some European machines. The Hitachi operator manual covering seven North American -7H models illustrates why even a shared series name does not mean every model has interchangeable components.
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Does the number tell me the excavator’s weight in tons?
Only approximately. The digits are a useful first size clue, not a weight specification. Actual operating weight changes with the market build and selected arm, bucket, counterweight, track shoes and undercarriage, among other configuration details.
A Latin America specification sheet lists the ZX210LC-7H at 22,400 kg, while a dealer catalog lists that model at 50,927 lb (about 23.1 metric tonnes). The dealer’s listing also gives a maximum digging depth of 21 ft 11 in. Those are different published figures for the same printed code, so a reader should not treat either as a universal weight for every ZX210LC-7H. Check the actual machine specification and build before using a number for hauling, permitting, lifting or ground-pressure planning.
The variation is clear on the ZX350LC family. Hitachi’s North American 2025 sheet gives 36,200 kg with a 3.20 m arm and 36,400 kg with a 4.00 m arm, both on 800 mm shoes. A Latin America sheet lists a ZX350LC-7H at 35,200 kg in a specified configuration with 600 mm shoes. The European ZX350LC-7 / ZX350LCN-7 brochure gives a range of 35,200–37,500 kg. The code starts the comparison; the market and configuration finish it.
Nearby class numbers are not a precise formula either. In Hitachi China’s 6A table, the ZX210-6A is listed at 20,400–20,500 kg, while the ZX220LC-6A is 21,100–21,400 kg. Both have a listed 122 kW rating, but the LC model is heavier and has a different bucket range. For a representative smaller machine, dealer figures put the ZX17U-5N at 3,790 lb, while the ZX75US-7 is listed at 18,300–18,900 lb—not exactly 7.5 metric tonnes.
Use the model number to estimate class, then use the specification for the exact machine. Hitachi’s Americas sheets also warn that specifications may change without prior notice, and that standard and optional equipment can vary by country. The Latin America ZX210LC-7H specification sheet is a useful example of a market-specific sheet rather than a global weight guarantee.
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What do LC, US, USB, U and W mean?
These letters point to different machine layouts. They matter because carriage length and tail swing affect stability, ground pressure and access, while W identifies a wheeled carrier rather than a tracked one.
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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minute- LC means long carriage. Hitachi’s hardware tables show the practical distinction: in one ZX350-7G comparison, the LC has eight lower rollers versus seven on the standard-carriage version. In the specified 600 mm shoe and 2.67 m arm row, the ZX350-7G is 31,900 kg at 64 kPa, while the ZX350LC-7G is 32,600 kg at 61 kPa. The LC is heavier in that configuration but has lower listed ground pressure. LC is not a bigger engine: China’s ZX210-6A and ZX220LC-6A both have a listed 122 kW rating.
- US identifies a short- or reduced-tail-swing configuration in the models documented here. Dealer descriptions position the ZX135US-7H for utility, road and commercial jobs with limited rear clearance. Its listed weight varies from 31,967 to 35,053 lb depending on configuration.
- USLC combines reduced tail swing and long carriage. A dealer lists the ZX345USLC-7H at 79,366 lb, close to the catalog’s 80,248 lb figure for a ZX350LC-7H, but the USLC is intended for work where a conventional counterweight needs more clearance. Similar weight does not make these machines equivalent: compare rear swing radius and the actual working envelope.
- USB appears on reduced-tail-swing compact excavators. The dealer specifically describes the ZX85USB-7 as having a swing boom; do not assume that detail applies to every USB model just because the letters match.
- U marks the compact family, but exact tail-swing behavior is model-specific. The ZX17U-5N is described as zero-tail-swing with a variable-width undercarriage, while the ZX30U-5N is described as reduced-tail-swing.
- W marks a wheeled excavator in documented codes. Hitachi’s 2016 Russia comparison page lists older ZX170W-5A, ZX190W-5A and ZX210W-5A models; a 2023 trade page links to the Landcros ZX180W-7. The older Russia list is not a current market price or availability list.
When comparing an LC with a standard carriage, check the same shoe width and arm, then compare operating weight, ground pressure, roller count, transport dimensions and the applicable lift chart. When comparing US or USLC, the key question is whether the rear of the machine clears the road, wall or lane where it must work.
What does H mean on a Hitachi excavator?
Position matters. An H before the hyphen indicates a heavier-duty configuration in the examples here; an H after the generation number is part of a series label, such as -7H. Neither position alone tells you the machine’s bucket size or suitability for a particular job.
Hitachi’s ZX350-7G component tables show why the pre-hyphen H is a duty-package clue. The standard and LC versions have a 6,350 kg counterweight; the H and LCH versions have a 6,900 kg counterweight. The listed monoblock boom and 2.67 m arm are also heavier on the H versions. Yet the brochure’s bucket range for the H and LCH pair is 1.38–1.62 m³, compared with 1.38–1.86 m³ for the standard and LC pair. Engine rated power is 200 kW across those pairs. H does not mean a larger engine or automatically a larger bucket.
Market packages can differ substantially. A 2024 Indonesian-market brochure for the ZX350H-7G / ZX350LCH-7G describes 2.00–2.30 m³ rock buckets, a 6.4 m H-boom and a 2.33 m arm. That is not the same bucket range as the other ZX350-7G brochure. Select a duty package by matching its front, counterweight and bucket specification to the material and attachment—not by assuming one universal H build.
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The trailing H is different. The North American ZX350LC-7H belongs to the ZAXIS-7H series; its H is after the generation number. Do not read it as the heavy-duty configuration code in ZX350H-7G. To compare the two, check each complete model code, market specification, weight, front and bucket tables.
What do -5, -6, -7, -7G and -7H mean?
The number after the hyphen identifies a generation designation, but trailing letters are not a single global progression. The documents here show parallel market and series labels, so -7G and -7H should not be read as universally interchangeable or as a simple worldwide ranking.
Examples in the cited Hitachi and dealer documents include North American ZAXIS-7H medium models from ZX130-7H through ZX350LC-7H; European mid-size ZAXIS-7 models such as ZX250LC-7 and ZX350LC-7; and European large ZAXIS-7G models including ZX490-7G and ZX550-7G. Hitachi China’s current medium-excavator table uses 6A codes such as ZX350-6A. Compact dealer listings still include -5N models. These examples describe different model and market documents, not a promise that every suffix is available everywhere.
Generation can change equipment that the class digits do not reveal. A Hitachi ZAXIS-7 brochure for the European ZX250LC-7, ZX300LC-7 and ZX350LC-7 states up to 10% lower fuel consumption than the previous models; this is a vendor claim for those models, not an independently confirmed figure or a guarantee for another market. A ZAXIS-5G brochure states a 4% reduction against the ZX850-3 family for the ZX870-5G. Keep such claims attached to their stated comparison and source.
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Equipment also varies within a generation. The ZX490LC-7H brochure lists ECO, PWR and HP work modes, up to 16 attachment presets, an 8-inch anti-glare monitor and a 270-degree Aerial Angle camera system. A dealer catalog names TRIAS III on the ZX210LC-7H and HIOS IV on the ZX130-7H, so do not assume that every 7H uses the same hydraulic-system name. Emissions equipment, monitor, camera and telematics should be checked on the exact market sheet, not inferred from -7H or the class number.
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Which features matter most when choosing between two ZX models?
Start with the worksite and the actual machine build. The code narrows the field, but the feature that matters most depends on whether the job is limited by ground bearing, rear clearance, material, reach, transport or attachment control.
- Confirm the quoted operating weight and build. Record shoe width, arm length, bucket, counterweight and whether the undercarriage is fixed or variable-gauge. A brochure’s weight range may cover several configurations, not one machine. For transport or lifting, use the exact machine’s documentation rather than the class number.
- Match carriage and ground pressure to the ground. LC can add rollers and change ground pressure; wider shoes can also reduce pressure. For example, the North American ZX350LC-7H sheet lists about 50.7–51.0 kPa on 800 mm shoes, while the Latin America sheet lists 65.8 kPa on 600 mm shoes. Always quote pressure with the shoe width and configuration.
- Check tail swing and carrier type against the site. Compare the actual rear swing radius for standard versus US or USLC machines. For travel between work areas, determine whether a tracked or wheeled carrier is required. Compact U and USB configurations are also model-specific.
- Choose a duty package by its component and bucket tables. If considering H or LCH for rock, quarry or severe work, compare counterweight, boom and arm mass, and the bucket range for the relevant market. Do not assume H is mining-only or that its bucket is always larger.
- Compare front geometry as a package. Monoblock, two-piece, BE or H-boom configurations and different arm lengths affect reach, digging depth, force and machine weight. On a European ZX250LC row with 600 mm shoes, the two-piece-boom configuration is listed at 27,100 kg versus 26,500 kg for the monoblock. A shorter arm can increase crowd force while reducing reach: the North American ZX350LC-7H sheet lists 185 kN arm crowd force with a 3.20 m arm and 159 kN with a 4.00 m arm, while bucket digging force stays 246 kN. Those force figures are calculated at power boost.
- Check the generation’s controls, emissions and technology. Look for the work modes, hydraulic-system details, aftertreatment, monitor, camera and telematics actually listed for the market model. The ZX210LC-7H and ZX250LC-7H Americas sheet, for example, specifies DOC + SCR aftertreatment; China’s 6A listing is a different market package. Do not treat matching class digits as proof that emissions equipment or electronics match.
- Verify attachment hydraulics if you use tools. The ZX490LC-7H brochure lists up to 16 saved attachment flow presets and features including Tilt Control and Attachment / Arm Tuning Control. A 2023 trade report describes adjustable attachment-versus-arm and boom-raise priorities on the ZX210LC-7 monitor. Check the exact model for needed flow, pressure, controls and coupler compatibility.
Compare power only when the rating standards match. One Americas sheet gives ZX350LC-7H power as 210 kW under ISO 14396 gross and 202 kW under ISO 9249 net. A Europe ZX490-7G brochure lists 296 kW (397 HP), but the retrieved cover does not identify whether that figure is ISO 9249 net or ISO 14396 gross. Do not subtract or rank unlike ratings as though they were the same measurement. For digging force, compare figures under the same standard—such as ISO 6015—and account for whether the sheet specifies power boost.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What is the difference between ZX350-7G and ZX350LC-7G?
The LC model has a long carriage; it is not simply a higher-power ZX350. In Hitachi’s stated comparison, the LC adds a lower roller, is slightly heavier in the specified configuration, and has lower listed ground pressure.
With 600 mm triple-grouser shoes and a 2.67 m arm, the brochure lists the ZX350-7G at 31,900 kg and 64 kPa, and the ZX350LC-7G at 32,600 kg and 61 kPa. The LC version has eight lower rollers versus seven. Those figures support a configuration comparison, not a universal promise that every LC build will have lower pressure than every standard build. Check the applicable shoe, arm and weight row, and consider the work’s lifting and transport requirements as well as ground bearing.
What is different about an SLF model?
SLF means Super Long Front: it is an application front for jobs that need substantially more reach than a standard boom, rather than a new model-family code. The Hitachi SLF brochure keeps the base codes ZX210LC-7H, ZX250LC-7H and ZX350LC-7H and labels the Super Long Front application separately.
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The scale of the trade-off is clearest on the ZX350LC-7H SLF. Hitachi’s 2024 brochure lists a 57 ft (17,380 mm) maximum digging depth, a 30 ft 5 in (9.26 m) arm and a 0.40 m³ bucket. The dealer lists the standard ZX350LC-7H at 80,248 lb and 26 ft 10 in maximum digging depth, versus 84,900 lb and 57 ft for the SLF. For the ZX210LC-7H, the dealer lists a standard depth of 21 ft 11 in and an SLF depth of 39 ft 2 in; the SLF brochure gives the SLF machine at 54,900 lb with a 0.52 m³ bucket. The longer front buys reach but comes with different weight and bucket capacity. For canal, slope and waterway work, compare the SLF working-range table and complete build against the standard machine rather than looking only at the unchanged base code.
How should I verify a ZX specification before buying or transporting one?
Use the complete model code and the exact market specification, then match the figures to the machine’s installed configuration. A brochure figure is only useful when its series, market and equipment row match the excavator being considered.
- Copy the model code from the machine’s identification plate and note its serial number.
- Ask the dealer for the specification sheet applicable to that market and serial-number range, including the precise undercarriage, shoes, arm, boom, bucket and counterweight.
- For transport, verify the applicable transport dimensions and weight for the actual build; do not substitute an approximate class weight.
- For ground-sensitive work, use a ground-pressure figure that states the shoe width and configuration. For lifts, use the relevant lift chart, not operating weight alone.
- For power or force comparisons, check the rating standard and any power-boost note before comparing figures.
- Confirm standard and optional equipment, emissions package and attachment hydraulics with the dealer. The Americas specification sheets expressly say equipment can vary by country and specifications can change.
Codes not defined in the Hitachi materials cited here should remain uncertain rather than be guessed. LCN, LCR, C, Pro, HRD and BE appear in model or component tables, but the retrieved Hitachi documents do not define those abbreviations. In particular, do not apply an industry definition for NLC to Hitachi’s LCN, or infer the meaning of HRD from its initials.
Frequently Asked Questions
Can I order Hitachi excavator parts using only the ZX model number?
A model number alone may not identify the right part, because parts and options can vary by country and machine build. Give the dealer the complete model code and serial number so they can check the applicable parts information.
Does a ZX-7H always have the same hydraulic system?
No. The dealer catalog cited here names TRIAS III for the ZX210LC-7H and HIOS IV for the ZX130-7H. Confirm the system and features on the specification for the exact model and market.
Is Hitachi’s stated fuel saving a guaranteed result on my jobsite?
No. The up-to-10% figure is a manufacturer claim for specified European ZX250LC-7, ZX300LC-7 and ZX350LC-7 models compared with previous models. It is not an independently confirmed result or a guarantee for another model, market or operating condition.
What does the K mean in a ZX excavator code?
K appears in models such as ZX220K-6A, but the Hitachi material cited here does not define the letter. A seller’s explanation associates K with demolition, but that definition is not confirmed by the Hitachi source documents cited in this article.
