Used Caterpillar D7RBulldozer

Reading: 22

📌 1. OVERVIEW

Item	Details
Manufacturer	Caterpillar Inc. (CAT)
Model	D7R
Series	D-Series (Medium Dozer)
Position in Lineup	Between the D6R (smaller) and D8R (larger)
Predecessor	D7N (N-Series)
Production	Mid-2000s – Present
"R" Designation	Current generation with Ride Control capability

The D7R is a medium-sized crawler tractor designed for demanding earthmoving, road building, land clearing, and pipeline construction work. It is one of Cat's most versatile and popular dozers in the 200+ HP class.

📌 2. ENGINE SPECIFICATIONS

Specification	Detail
Engine Model	Cat C9 ACERT® Diesel
Displacement	9.6 L (588 cu in)
Rated Power	250 hp (186 kW) @ 2,000 rpm
Torque	985 lb-ft (1,335 N·m) @ 1,400 rpm
Emissions Standard	EPA Tier 4 Final / EU Stage V
Fuel System	Electronic unit injection (EUI)
Aftertreatment	Diesel Particulate Filter (DPF) + Diesel Exhaust Fluid (DEF/AdBlue)
Cooling	Air-to-air aftercooled

✅ The ACERT technology provides excellent fuel efficiency and meets the strictest emissions regulations worldwide.

📌 3. OPERATING SPECIFICATIONS

Specification	Detail
Operating Weight	46,000 – 52,000 lbs (20,865 – 23,587 kg) (varies by configuration)
Ground Pressure	7.0 – 8.5 psi (48 – 59 kPa)
Ground Contact Length	~11.7 ft (3.57 m)
Track Shoe Width	24 in (610 mm) or 28 in (711 mm) options
Speed (Forward)	0 – 7.9 mph (0 – 12.7 km/h) — 6 speeds
Speed (Reverse)	0 – 9.6 mph (0 – 15.4 km/h) — 6 speeds
Gradeability	30° (58%)
Side Slope Capability	30° (58%)

📌 4. BLADE OPTIONS & CAPACITIES

Blade Type	Capacity	Best For
Straight (S) Blade	4.8 cu yd (3.7 m³)	General purpose, finishing
Universal (U) Blade	5.7 cu yd (4.4 m³)	Heavy loading, stockpiling
Semi-U (SU) Blade	5.0 cu yd (3.8 m³)	Compromise between S & U
Tilt Blade	4.8 cu yd (3.7 m³)	Side-casting, slope work
Angle Blade	4.5 cu yd (3.4 m³)	V-ditching, trenching
Pipeline Blade	4.8 cu yd (3.7 m³)	Pipeline right-of-way
Raise Option	+45° lift	Extended reach, overhead work

📌 5. KEY FEATURES & TECHNOLOGY

🔧 Ride Control System (Signature Feature)

Hydraulic accumulators absorb shock loads from the undercarriage
Reduces operator fatigue by up to 50%
Provides a smoother ride over rough terrain
Standard on most configurations

🛡️ Cab — ROPS/FOPS Certified

Feature	Detail
Structure	Roll-Over & Falling Object Protective Structure
Visibility	Excellent all-around visibility with large glass area
Climate Control	Heating & Air Conditioning
Seat	Full suspension, air-ride, heated option
Controls	Electronic levers, adjustable console
Noise Level	~72 dB(A) — one of the quietest in class

📡 Cat Technology Solutions

Technology	Function
Cat Product Link™	Remote machine monitoring, diagnostics, location tracking
Cat GRADE with 2D/3D	GPS-based blade control — auto-grade, slope, & depth control
Grade with Assist	Semi-automatic grading for faster, more accurate work
E-Fence	Virtual boundary alerts — prevents unauthorized movement
Cat Payload	On-the-go weighing system
VisionLink®	Fleet management & productivity tracking

📌 6. POWER TRAIN & UNDERCARRIAGE

Component	Detail
Transmission	Cat Powershift — 6F / 6R
Torque Converter	Lock-up converter for efficiency
Final Drives	Sealed-for-life, planetary
Track Rollers	7 per side (with optional 8)
Carrier Rollers	2 per side
Track Links	Sealed & lubricated (SAL) — extended service intervals
Drawbar Pull	~34,000 lbs (15,422 kg)
Ripper (Optional)	Single-shank, up to 14 in (356 mm) penetration

📌 7. DIMENSIONS

Dimension	Measurement
Length (with S-blade)	~22.5 ft (6.9 m)
Width (over tracks)	~11.8 ft (3.6 m)
Height (to ROPS top)	~11.3 ft (3.4 m)
Blade Width	11.8 ft (3.6 m)
Blade Height	3.8 – 4.7 ft (1.16 – 1.43 m)

📌 8. APPLICATIONS

Industry	Use Cases
🛣️ Road Construction	Grading, surfacing, shoulder work
🌲 Land Clearing	Tree pushing, brush removal, site prep
🛢️ Pipeline	Right-of-way clearing, trench backfill
⛏️ Mining	Small-to-medium quarry & mine operations
🏗️ General Earthmoving	Excavation, fill, compaction support
🏚️ Demolition	Building push-down, debris clearing
🌾 Agriculture	Large-scale land leveling, livestock operations
🌊 Flood Control	Levee construction, emergency work

📌 9. COMPARISON: D7R vs. Competitors

Spec	Cat D7R	Komatsu D65EXi-24	John Deere 750K
Power	250 hp	245 hp	248 hp
Operating Weight	~49,000 lbs	~49,000 lbs	~50,000 lbs
Blade Capacity (U)	5.7 cu yd	5.2 cu yd	5.2 cu yd
Ride Control	✅ Standard	✅ Optional	❌ Not available
GPS Grading	✅ Cat GRADE	✅ PCS	✅ Grade Control
Emissions	Tier 4 Final	Stage V	Tier 4 Final

🏆 The D7R's standard ride control and superior blade capacity give it an edge in operator comfort and productivity.

📌 10. MAINTENANCE & SERVICE INTERVALS

Item	Interval
Engine Oil Change	500 hours
Hydraulic Oil & Filter	2,000 hours
Final Drive Oil	4,000 hours (sealed)
Track Tension Adjustment	500 hours
Coolant Change	3,000 hours
Fuel Filters	500 hours
DEF Refill	Every 50–100 hours

📌 11. SUMMARY — WHY THE D7R?

✅ Strength	Details
Power	250 hp C9 ACERT — excellent power-to-weight ratio
Comfort	Best-in-class ride control + quiet cab
Productivity	Large blade + GPS grading = faster cycle times
Reliability	Cat build quality + long service intervals
Technology	Product Link, GRADE, E-Fence — connected fleet
Versatility	Dozens of blade & ripper configurations
Resale Value	Cat machines hold value better than competitors

🔑 Bottom Line: The Caterpillar D7R is widely regarded as the gold standard in the medium dozer class (200–270 HP). It strikes the perfect balance between power, productivity, operator comfort, and technology — making it the go-to choice for contractors worldwide.

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