Comparing the CAT 345B II and Deere 450C LC for Pit Loading Operations

[MikePhua]

Historical Background and Model Lineage
The Caterpillar 345B II and John Deere 450C LC are both large hydraulic excavators designed for high-production earthmoving. The CAT 345B II was introduced in the early 2000s as part of Caterpillar’s B-Series lineup, featuring a 345-horsepower engine and an operating weight of approximately 100,000 lbs. It was engineered for deep trenching, mass excavation, and heavy-duty loading, often used in mining and large-scale infrastructure projects.
John Deere’s 450C LC, part of the C-Series, entered the market slightly later and was designed to compete directly with CAT’s mid-to-large excavators. With a similar operating weight and horsepower class, the 450C LC emphasized fuel efficiency, smoother hydraulics, and simplified service access. Deere’s LC designation refers to “Long Carriage,” offering improved stability and lift capacity.
Both machines have been widely deployed across North America, with thousands of units sold. However, with over 13,000 to 15,000 operating hours on the units in question, buyers must shift focus from brand reputation to mechanical condition and service history.
Evaluating Condition Over Brand Loyalty
When comparing two high-hour machines, brand preference becomes secondary to actual wear, maintenance records, and component integrity. Key areas to inspect include:

• Undercarriage wear: sprockets, rails, pads, and idlers
  
• Hydraulic system: main control valve, pump efficiency, swivel joint leaks
  
• Structural integrity: boom and stick welds, pin and bushing play
  
• Engine performance: compression, blow-by, fuel delivery
  
• Electrical systems: monitor functionality, fault codes, wiring condition
  

Photos should include close-ups of the undercarriage, hydraulic joints, and valve assemblies. A well-maintained machine with 15,000 hours may outperform a neglected unit with 13,000 hours. Buyers should approach the inspection as if selling the machine themselves—transparent, detailed, and thorough.
Parts Availability and Dealer Support
Both CAT and Deere offer extensive dealer networks, but parts availability for older models can vary. The CAT 345B II, while robust, is considered legacy equipment, and some components may be discontinued or require remanufacturing. Deere’s 450C LC also faces similar challenges, especially for proprietary electronics and hydraulic modules.
Operators should consider:

• Proximity to authorized dealers
  
• Availability of reman parts and rebuild kits
  
• Access to technical manuals and diagnostic tools
  
• Turnaround time for major components like pumps and final drives
  

In regions with strong CAT dealer presence, the 345B II may be easier to support. Conversely, if Deere parts are more accessible locally, the 450C LC could offer lower long-term maintenance costs.
Application Suitability for Pit Loading
For pit operations involving overburden removal and truck loading, both machines are capable performers. However, subtle differences in design may influence productivity:

• The CAT 345B II offers slightly more breakout force and bucket capacity, making it ideal for dense material and aggressive digging.
  
• The Deere 450C LC is known for smoother hydraulic modulation, which can improve cycle times and reduce operator fatigue during repetitive loading.
  

Both machines should be equipped with heavy-duty buckets, reinforced linkage, and auxiliary hydraulic circuits if attachments like compactors or thumbs are planned.
Anecdote from the Southeast
A contractor in Alabama ran both a CAT 345B II and a Deere 450C LC in a limestone pit. While the CAT excelled in raw digging power, the Deere proved more fuel-efficient and easier to maintain. After 10,000 hours, the CAT required a full hydraulic pump rebuild, while the Deere continued operating with only minor seal replacements. The contractor eventually kept both machines, assigning the CAT to ripping and the Deere to truck loading.
Recommendations for Buyers
Before purchasing either machine:

• Request service logs and oil analysis reports
  
• Conduct a full walkaround with a qualified mechanic
  
• Test hydraulic response under load
  
• Inspect swing bearing for play or noise
  
• Verify monitor and diagnostic system functionality
  

If possible, negotiate a trial period or rental-to-own arrangement to assess performance in real-world conditions.
Conclusion
Choosing between the CAT 345B II and Deere 450C LC is less about brand and more about condition, support, and application fit. Both machines have proven themselves in demanding environments, but with over 13,000 hours, the margin for error narrows. A well-documented, clean machine with responsive hydraulics and solid undercarriage will outperform any competitor—regardless of the badge on the boom. In the world of heavy iron, it’s not what the machine was, but what it is today that counts.