The Hitachi ZX135US is a practical choice for buyers who need a mid-size excavator with stronger digging capability than compact machines but still want reduced rear swing for restricted jobsites. It is commonly considered for road work, utilities, civil engineering, foundations, site preparation and other construction where space around the machine can be limited.
For a used buyer, the main point is to identify the exact generation before comparing price or specifications. ZX135US-3, ZX135US-5B, ZX135US-6 and ZX135US-7 machines differ in engine output, operating weight, emissions equipment and configuration. A good purchase therefore depends on matching the exact machine to your workload, checking its hydraulic and undercarriage condition, and confirming transport requirements before shipment from Japan.
Who Should Consider a Hitachi ZX135US?
The ZX135US sits in the mid-size hydraulic excavator class. In Japanese specifications, standard versions are around 13 to 14 tonnes depending on generation.
This gives the machine considerably more digging capability than a 7- to 8-ton excavator such as the ZX75US, while the short-tail design helps reduce the rear space needed during swing.
A ZX135US may suit buyers working in:
- Road construction and maintenance
- Drainage and sewer projects
- Utility excavation
- Foundation work
- Urban civil engineering
- Site development
- Slope and embankment work
- Truck loading
- General earthmoving
- Compatible hydraulic attachment applications
The machine becomes especially attractive when a smaller excavator does not provide enough reach, stability or productivity, but a conventional larger excavator would require too much rear clearance.
Why the Short-Tail Design Is Important
Hitachi classifies the ZX135US as a rear ultra-short-swing excavator in Japan. This design reduces the rear projection of the upper structure during rotation compared with many conventional excavators.
That can help when working beside:
- Road traffic
- Buildings
- Retaining walls
- Temporary barriers
- Other construction equipment
- Narrow property boundaries
For example, Hitachi's Japanese ZX135US-5B specification lists a rear swing radius of 1,490 mm. That compact rear profile is one of the main reasons buyers consider the ZX135US instead of a conventional excavator in the same general size class.
Short-tail design does not remove the need for adequate safety space. The boom, arm and bucket still move outside the track area, so the entire operating envelope must be considered.
ZX135US Generations: Check the Suffix Before Comparing Machines
The basic ZX135US name has been used across several generations. Used machines from Japan may include ZX135US-3, ZX135US-5B, ZX135US-6 and newer ZX135US-7 models.
Hitachi's Japanese legacy data lists the ZX135US-3 at 13,400 kg with a 0.50 m³ bucket and 69 kW engine output. The ZX135US-5B remains at 13,400 kg in its standard Japanese specification but uses a 73.4 kW engine. The ZX135US-6 increases to 13,700 kg and 74.9 kW in the standard Japanese version.
Hitachi also lists the newer ZX135US-7 at 14,100 kg with 74 kW rated output and a bucket range of 0.45 to 0.59 m³ in its current Japanese catalog.
Specifications vary by model year, market, boom, arm, bucket, track width and optional equipment. Exact specifications should be confirmed for each individual machine.
Verified Japanese Specification Examples
| Item | ZX135US-3 | ZX135US-5B | ZX135US-6 | ZX135US-7 |
|---|---|---|---|---|
| Manufacturer | Hitachi Construction Machinery | Hitachi Construction Machinery | Hitachi Construction Machinery | Hitachi Construction Machinery |
| Machine type | Rear ultra-short-swing hydraulic excavator | Rear ultra-short-swing hydraulic excavator | Rear ultra-short-swing hydraulic excavator | Rear ultra-short-swing hydraulic excavator |
| Operating weight | 13,400 kg | 13,400 kg | 13,700 kg | 14,100 kg |
| Rated engine output | 69 kW | 73.4 kW | 74.9 kW | 74 kW |
| Bucket capacity | 0.50 m³ | 0.50 m³ | 0.45–0.59 m³ range in current Japanese listing | 0.45–0.59 m³ range |
This table is useful for understanding the model's development, but it should not be used as the final specification of an individual machine offered for sale.
ZX135US-5B: An Important Used-Market Reference
The ZX135US-5B is especially relevant to buyers looking at Japanese used machinery because Hitachi provides detailed specifications and multiple special configurations for this generation.
The standard Japanese ZX135US-5B has a 13,400 kg operating weight and a 0.50 m³ standard bucket. Hitachi lists an Isuzu AM-4JJ1X water-cooled four-cylinder direct-injection electronic-control diesel engine producing 73.4 kW at 2,000 rpm.
The hydraulic system uses two variable-displacement piston pumps plus one gear pump. Hitachi also lists a 220 L diesel fuel tank for the standard specification.
Representative working dimensions include:
- Maximum digging radius: 8,390 mm
- Maximum digging depth: 5,490 mm
- Maximum digging height: 9,290 mm
- Maximum dump height: 6,830 mm
- Overall length: 7,370 mm
- Overall width: 2,490 mm
- Overall height: 2,790 mm
- Rear swing radius: 1,490 mm
These figures apply to the referenced standard Japanese specification. Offset-boom, demolition and other configurations differ.
Special ZX135US Configurations Can Be Very Different
The ZX135US platform has been used for many specialized applications, which is particularly important when buying used machinery from Japan.
Hitachi offers or has offered ZX135US configurations for:
- Demolition
- Offset-boom work
- Forestry
- Grapple work
- Harvester and processor applications
- Swing yarder work
- Magnet handling
- Telescopic clamshell excavation
- Slide-arm applications
The operating weight can change substantially. For example, Hitachi lists a standard ZX135US-5B at 13,400 kg, while its demolition specification is listed at 14,600 kg and the offset-boom version at 15,000 kg.
For ZX135US-6 special machines, Hitachi lists examples ranging from approximately 14,400 kg for some handling configurations to more than 17,000 kg for certain forestry or blade-equipped specifications.
This means a buyer should never assume that a machine with “ZX135US” on the body is a normal standard excavator.
What Should You Inspect on a Used ZX135US?
1. Undercarriage Wear
The undercarriage is one of the most expensive wear areas on a mid-size crawler excavator.
Check:
- Track links
- Track shoes
- Sprockets
- Front idlers
- Bottom rollers
- Carrier rollers
- Track tension
- Track frame condition
- Uneven wear between left and right sides
A clean upper body can hide substantial undercarriage wear, so this area deserves close attention.
2. Hydraulic System
Hydraulic condition directly affects digging speed, swing, travel and attachment performance.
Operate the boom, arm and bucket through individual and combined movements where possible. Also test swing and travel.
Look for:
- Hydraulic leaks
- Damaged hoses
- Scratched or pitted cylinder rods
- Slow or inconsistent movement
- Abnormal pump noise
- Excessive cylinder drift
On a machine that has used heavy hydraulic attachments, hydraulic condition becomes even more important.
3. Boom, Arm and Structural Repairs
Check high-stress areas around the boom foot, boom-to-arm connection, cylinder mounts and pin bosses.
Look for cracks, reinforcement plates, deformation or weld repairs. A repair does not automatically mean the machine should be rejected, but the reason and quality of the repair should be understood.
4. Pins and Bushings
Check play at the bucket linkage, arm connection and boom mounting points.
Some movement is normal on a used machine, but excessive looseness can reduce digging accuracy and increase future maintenance costs.
5. Swing Bearing and Swing Drive
The ZX135US is designed for frequent work in confined environments, so swing-system condition is important.
Rotate the upper structure in both directions and check for unusual noise, excessive backlash or abnormal movement.
6. Engine and Emissions Equipment
Where possible, inspect starting behavior from cold.
Check:
- Starting difficulty
- Exhaust smoke
- Engine noise
- Oil leaks
- Coolant leaks
- Warning lights
- Cooling-system cleanliness
Later ZX135US generations can include more advanced emissions systems. For example, the ZX135US-6 Japanese specification includes a 13 L urea tank in some applications. Buyers should make sure local maintenance support and suitable fluids are available for the exact machine.
Operating Hours Need Context
Operating hours should be used as one part of the buying decision, not as a complete condition rating.
A ZX135US used mainly for normal excavation may have experienced very different wear from another machine that spent years in demolition, forestry or heavy attachment work.
Compare the hour meter with:
- Undercarriage condition
- Hydraulic performance
- Structural wear
- Pin and bushing play
- Cab and control wear
- Engine condition
- Previous application
- Maintenance history when available
A low-hour machine should not automatically be considered the better purchase if its physical condition shows severe use.
Attachment History Can Change the Buying Decision
Because the ZX135US platform supports many special applications, attachment history deserves more attention than on a machine used only with a standard bucket.
A forestry machine, demolition excavator or telescopic clamshell machine may have:
- Different counterweights
- Reinforced structures
- Special hydraulic circuits
- Different boom or arm assemblies
- Protective guarding
- Different track specifications
If the machine will use a breaker, grapple, crusher or another hydraulic attachment after export, confirm the actual piping, hydraulic flow requirements and controls before purchase.
Do not assume compatibility from visible pipes alone.
ZX75US or ZX135US: When Does Moving Up Make Sense?
Buyers considering a ZX135US may also be looking at the smaller ZX75US. The move up in size is significant.
| Consider a ZX75US-Class Machine When... | Consider a ZX135US-Class Machine When... |
|---|---|
| Transport flexibility is a high priority. | Your transport system can handle a 13- to 14-ton machine. |
| Utility and construction work is moderate. | Greater digging depth and production are regular requirements. |
| Jobsite access is very restricted. | You still need reduced tail swing but can accommodate a wider machine. |
| Lower fuel and undercarriage costs matter more. | Higher productivity can justify higher running costs. |
| Daily excavation volume is limited. | Earthmoving volume is high enough to benefit from the larger class. |
The ZX135US makes sense when the additional capability will be used regularly. If most jobs remain relatively light, the smaller machine may provide a better balance of transportability and cost.
What About ZX135US-6 and ZX135US-7?
The ZX135US-6 represents a newer generation than the ZX135US-5B and is still listed by Hitachi Construction Machinery Japan.
The standard Japanese ZX135US-6 is listed at 74.9 kW, 0.50 m³ bucket capacity, 7,370 × 2,490 × 2,870 mm and 13,700 kg operating weight.
The newer ZX135US-7 is listed in Hitachi's Japanese catalog at 74 kW, 14,100 kg operating weight and a 0.45 to 0.59 m³ bucket range.
Newer generations can provide updated control, emissions, visibility and operator-support technology, but they can also require more advanced diagnostics and emissions-related maintenance.
The right generation therefore depends on purchase budget, expected utilization, maintenance support and local operating conditions.
Lifting Capacity Must Be Checked from the Correct Chart
The ZX135US can be used for handling pipes and other materials, but lifting capacity changes according to operating radius, height, arm length, track configuration and machine position.
There is no single reliable “ZX135US lifting capacity” number that applies in all situations.
If lifting is part of your planned work, confirm the exact machine configuration and use the manufacturer's appropriate lifting chart. Also check applicable local safety and lifting regulations.
Shipping a ZX135US from Japan
The ZX135US is compact compared with larger conventional excavators, but it still requires heavy-equipment shipping planning.
As one reference, the standard Japanese ZX135US-5B measures 7,370 mm long, 2,490 mm wide and 2,790 mm high, with an operating weight of 13,400 kg. The ZX135US-6 uses the same listed length and width in its standard Japanese specification but is taller and heavier.
Special-purpose machines can be substantially different.
Before arranging freight, confirm:
- Complete model designation
- Serial number
- Standard or special-purpose configuration
- Actual overall length
- Actual width
- Actual height
- Transport weight
- Bucket and attachments
- Counterweight configuration
- Destination port and current shipping requirements
RORO, flat rack, breakbulk, container or other cargo arrangements may be considered depending on machine dimensions, destination, port, shipping line and current service conditions. The suitable method should be confirmed for the specific machine rather than assumed from the ZX135US model name.
A Practical Pre-Purchase Checklist
- Identify the exact generation. Confirm ZX135US-3, ZX135US-5B, ZX135US-6, ZX135US-7 or another exact version.
- Check the serial number.
- Confirm whether the machine is standard or specialized.
- Review operating hours together with physical wear.
- Inspect the undercarriage carefully.
- Test hydraulic performance where possible.
- Inspect boom, arm, pins and previous repairs.
- Check engine and emissions-system condition.
- Confirm auxiliary piping and included attachments.
- Verify dimensions and weight before freight calculation.
Buying a Used Hitachi ZX135US from Japan
The Japanese used market can include ZX135US machines from several generations and many different applications. That variety can create good buying opportunities, but it also makes specification verification especially important.
You can check current Japanese used machinery available at EVERYCAR.jp. Inventory changes regularly, so availability of a specific Hitachi ZX135US generation or configuration should be confirmed from current stock.
For more information about choosing excavators and other Japanese machinery, visit the Japanese Used Machinery & Heavy Equipment Guide | 100 Articles.
Should You Buy a Used Hitachi ZX135US?
The ZX135US is most suitable for buyers who need a meaningful increase in digging capability over compact excavators while still benefiting from reduced rear swing. It is especially relevant to road, utility, civil engineering and construction work where both productivity and maneuverability matter.
The model name alone should not decide the purchase. Identify the generation and configuration first, then judge the undercarriage, hydraulics, engine, swing system, structural condition and attachment history. Finally, check whether the verified working range and transport requirements match your operation.
If you are looking for a Hitachi excavator or other used machinery from Japan, you can contact EVERY with your preferred manufacturer, model, size, budget, intended application and destination. Clear requirements provide a better basis for comparing available machinery with your actual work.
Browse Reliable Used Trucks & Buses from Japan
Carefully selected vehicles ready for export worldwide
Search 100,000+ Dealer Stock Vehicles from Japan
Access a wide selection of vehicles from Japanese dealers nationwide. Updated daily.
