Hitachi ZX135 vs ZX160 for Agricultural and Utility Excavation

[MikePhua]

Hitachi’s Excavator Lineage and Market Impact
Hitachi Construction Machinery, founded in 1970, has built a global reputation for precision-engineered hydraulic excavators. The ZX series, introduced in the early 2000s, marked a shift toward electronically controlled systems and improved operator ergonomics. The ZX135 and ZX160 are part of Hitachi’s mid-size excavator lineup, designed for versatility across construction, utility, and agricultural sectors. By 2015, Hitachi had sold over 100,000 units globally in the 13–20 ton class, with strong adoption in North America, Australia, and Southeast Asia.
The ZX135 typically weighs around 30,000 lbs and delivers 88 horsepower, while the ZX160 pushes closer to 33,000 lbs with a 100 hp engine. Both machines offer an 18-foot dig depth, though boom configurations can alter reach and breakout force. These two models often compete for the same buyer—someone needing a balance of power, maneuverability, and affordability.
Cab Comfort and Operator Fit
One of the most overlooked factors in excavator selection is operator comfort. The ZX135’s cab is notably compact, which can be a challenge for taller or heavier operators. At 6'5" and 270 lbs, for example, legroom becomes a limiting factor. The ZX160 offers a full-sized cab with extended seat travel and better visibility, making it more suitable for long shifts and larger operators.
This difference isn’t just about comfort—it affects productivity. Cramped cabs lead to fatigue, slower reaction times, and increased risk of repetitive strain injuries. For ranchers or contractors spending 8–10 hours in the seat, cab ergonomics should be a top priority.
Power and Breakout Force Comparison
When comparing raw digging power, the ZX160 holds a clear advantage:

• Arm force: ZX135 = 14,100 lbs ZX160 = 18,600 lbs
  
• Bucket force: ZX135 = 19,400 lbs ZX160 = 23,200 lbs
  
• Lift capacity at 20 feet: ZX135 = 6,966 lbs ZX160 = 8,013 lbs
  

These numbers translate into real-world performance. The ZX160 can more effectively dig in frozen ground, lift large concrete slabs, and handle tree removal without straining the hydraulic system. For tasks like trenching through frost or piling debris from demolished structures, the extra muscle pays off.
Tail Swing and Maneuverability in Tight Spaces
The ZX135’s compact design makes it ideal for confined environments like feedlot pens, barnyards, or urban utility corridors. Its reduced tail swing minimizes the risk of collision with fences, walls, or other equipment. In contrast, the ZX160’s larger footprint can be cumbersome in tight quarters, especially when working near livestock or structures.
Operators working in open fields or large yardsites may not notice the difference, but those navigating narrow lanes or cluttered farmyards will appreciate the ZX135’s agility. One farmer in Saskatchewan noted that the smaller machine allowed him to clean bunks and dig culverts without disturbing nearby fencing.
Durability and Maintenance Considerations
Both models are known for reliability, but the ZX160 offers easier access to hydraulic components and filters due to its larger frame. The EX160-5, a predecessor to the ZX160, was praised for its straightforward maintenance layout and robust pump design. While the Deere 160LC had hydraulic pump issues, Hitachi’s version remained largely unaffected.
The ZX135’s tighter engine bay can make routine service more challenging, especially for field repairs. For operators working in remote areas without shop access, ease of maintenance becomes a deciding factor.
Terminology Clarification

• Breakout Force: The maximum force an excavator can exert at the bucket tip during digging
  
• Arm Force: The hydraulic force applied through the stick (arm) during excavation
  
• Tail Swing: The radius of the machine’s rear end during rotation
  
• Lift Capacity: The maximum weight the excavator can safely lift at a given reach and height
  

Use Case Scenarios and Operator Stories
A rancher managing a 10,000-head feedlot shared his experience using a ZX135 for manure piling and trenching. While the machine performed well in tight pens, he struggled with frozen ground and heavy debris. After upgrading to a ZX160, he reported faster cycle times and fewer hydraulic stalls during winter operations.
Another operator clearing 50 acres for farmland found the ZX160 more effective for tree removal and stump extraction. He noted that while the ZX135 could handle small saplings, the larger machine saved hours when dealing with mature hardwoods.
A dealer once remarked that customers rarely complain about buying a machine that’s too large—but often regret going too small. This sentiment echoes across excavation work, where underpowered machines lead to frustration and inefficiency.
Recommendations Based on Application
Choose the ZX135 if:

• You work primarily in tight spaces or confined pens
  
• Operator size is average and cab comfort is not a concern
  
• Tasks involve light trenching, culvert installation, or bunk cleaning
  

Choose the ZX160 if:

• You frequently dig in frozen ground or remove trees
  
• You need higher lift capacity for concrete or debris
  
• Operator comfort and maintenance access are priorities
  

Final Thoughts
The decision between the Hitachi ZX135 and ZX160 hinges on a balance of space, power, and comfort. While the ZX135 excels in maneuverability and cost, the ZX160 offers superior performance for demanding tasks. For ranchers, contractors, and landowners facing varied terrain and seasonal challenges, the larger machine often proves to be the more versatile and enduring investment. With proper maintenance and thoughtful operation, either model can deliver years of reliable service—but choosing the right one from the start makes all the difference.