Choosing the Right Skid Steer for Mixed Terrain and Brush Work

[MikePhua]

Bobcat’s Dominance in the Skid Steer Market
Bobcat revolutionized compact equipment in the 1960s and has remained a market leader in skid steer loaders ever since. By the 2010s, models like the S650 and S590 had become staples in rental fleets, farms, and construction sites across North America. The S650, part of Bobcat’s M-Series, offers vertical lift geometry and a rated operating capacity (ROC) of 2,690 lbs, while the S590—its smaller sibling—delivers 2,100 lbs ROC with a more compact footprint. Both machines are compatible with over-the-tire (OTT) tracks, making them versatile for seasonal terrain shifts.
Evaluating Lift Capacity and Stability
Lift capacity isn’t just about numbers—it directly affects safety, productivity, and attachment compatibility. While the difference between 2,100 lbs and 2,690 lbs may seem modest on paper, it becomes significant when handling heavy implements like brush mowers or grapple buckets. Operators working on uneven terrain often find that higher ROC improves machine stability, especially when lifting loads that extend beyond the bucket edge.
For example:

• A 7-foot brush mower can weigh 1,700–2,000 lbs depending on brand and blade configuration
  
• Palletized materials with overhang require additional lift margin to avoid tipping
  
• Grapple work in wooded areas benefits from extra counterweight and lift force
  

One operator in Wisconsin noted that his machine struggled to lift a pallet of stone when the load extended past the bucket lip. Upgrading to a higher ROC model resolved the issue and improved safety.
Hydraulic Flow and Mower Performance
Hydraulic horsepower is critical when running attachments like brush cutters. The S650 offers optional high-flow hydraulics (30–38 GPM), while the S590 typically runs standard flow (16–25 GPM). Brush mowers are rated by flow range, and running a mower at the lower end of its spec can result in poor blade speed, slow recovery, and reduced cutting efficiency.
Hydraulic HP is calculated using the formula:

• Hydraulic HP = (Flow × Pressure) ÷ 1,714
  

For example:

• Standard flow at 20 GPM and 3,000 PSI = ~35 HP
  
• High flow at 30 GPM and 3,000 PSI = ~52 HP
  

Operators cutting dense brush or saplings over 4 inches in diameter should prioritize high-flow systems. One contractor in South Carolina found that his standard-flow mower bogged down in thick material, while a high-flow setup maintained blade speed and cleared acreage twice as fast.
OTT Tracks and Terrain Adaptability
Over-the-tire tracks transform a wheeled skid steer into a pseudo-track loader, improving flotation and traction in mud, snow, and loose gravel. Steel OTT tracks offer superior grip and durability but can damage paved surfaces and increase vibration. Rubber OTT tracks are quieter and gentler on hard surfaces but wear faster in rocky terrain.
Considerations for OTT selection:

• Steel tracks: Best for forestry, mud, and steep slopes
  
• Rubber tracks: Ideal for mixed-use, snow, and turf protection
  
• Wheel spacers: Required for most OTT systems to prevent rubbing and allow proper clearance
  

One operator in Minnesota reported that his S650 with steel OTT tracks handled spring mud better than his 4WD tractor, especially on narrow trails where maneuverability mattered.
Engine Choice and Reliability Concerns
Bobcat machines from the early 2010s may feature either Kubota or Doosan engines. Kubota diesels are widely respected for reliability and parts availability, while Doosan engines have received mixed reviews due to early emissions system issues. That said, thousands of Doosan-powered units remain in service, and major rental fleets continue to purchase them.
Engine comparison:

• Kubota: Proven reliability, easier cold starts, better resale
  
• Doosan: Higher torque curve, newer emissions tech, lower initial cost
  

Buyers should check engine serial numbers and confirm service history. One rental yard in Ohio reported fewer service calls on Kubota-powered S590s compared to Doosan-equipped S650s, though both performed well under routine maintenance.
Cab Features and Operator Comfort
The A91 package on newer Bobcat models includes air ride seats, joystick controls, sound insulation, and upgraded lighting. These features improve operator comfort during long shifts and reduce fatigue. While not essential for short tasks, they become valuable in brush mowing, snow removal, and grading where visibility and control precision matter.
Cab upgrades worth considering:

• Joystick controls: Reduce wrist strain and improve responsiveness
  
• Soundproofing: Cuts cabin noise by 30–40%, especially with high-flow attachments
  
• Heated seats and HVAC: Essential for winter work in northern climates
  

One operator in Alberta noted that his A91-equipped S650 allowed him to work longer hours in sub-zero conditions without discomfort.
Balancing Hours, Age, and Warranty
When choosing between two machines, hours and age matter. A 2013 S590 with 287 hours may offer better longevity than a 2011 S650 with 1,100 hours, even if the latter has more power. However, warranty coverage and service records can tip the balance.
General guidelines:

• Under 500 hours: Ideal for long-term ownership
  
• 1,000–2,000 hours: Mid-life, expect minor repairs
  
• Over 2,500 hours: Budget for hydraulic and electrical service
  

A newer machine with fewer hours and remaining warranty may justify a higher price, especially if it includes premium features.
Conclusion
Choosing the right skid steer involves more than comparing specs—it’s about matching machine capability to terrain, attachments, and workload. The Bobcat S650 offers superior lift and hydraulic power, making it ideal for brush mowing and grapple work. The S590 provides maneuverability and lower hours, appealing to buyers focused on longevity and light-duty tasks. With OTT tracks, cab upgrades, and engine reliability in mind, operators can make informed decisions that maximize productivity and minimize downtime. In the end, the best skid steer is the one that fits your land, your tools, and your rhythm.