John Deere 4066M Heavy Duty vs John Deere 4520
Every published spec for both machines, side by side. The verdict below is computed straight from the spec sheets, not opinion.
Across 9 measurable specs, this matchup is a dead heat: 4 categories to the John Deere 4066M Heavy Duty, 4 to the John Deere 4520, 1 tied. Machine pages: John Deere 4066M Heavy Duty and John Deere 4520.
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Category Verdict
| Spec | John Deere 4066M Heavy Duty | John Deere 4520 |
|---|---|---|
| Engine HP (hp) | ▲ 65.9 hp | 60 hp |
| PTO HP (hp) | 51.9 hp | ▲ 52 hp |
| Weight (lb) | ▲ 4,255 lb | 3,700 lb |
| Loader Lift (lb) | ▲ 2,539 lb | 2,486 lb |
| 3-Pt Lift (24 in) (lb) | 2,500 lb | 2,500 lb |
| Lift Height (in) | 110 in | ▲ 112.8 in |
| Breakout Force (lbf) | 3,853 lbf | ▲ 3,934 lbf |
| Hydraulic Flow (gpm) | 15.9 gpm | ▲ 17.1 gpm |
| Travel Speed (mph) | ▲ 18.6 mph | 17.3 mph |
Full Spec Sheet
Every published spec, side by side, including the details the graphs above don't chart.
| Spec | John Deere4066M Heavy Duty | John Deere4520 |
|---|
| Engine Manufacturer | Yanmar | John Deere |
|---|---|---|
| Engine Model | 4TNV86CHT-MJT | PowerTech 4024T |
| Engine Type | Turbocharged 4-cylinder Diesel | 4-cylinder turbocharged liquid-cooled diesel, direct injection |
| No. of Cylinders | 4 | 4 |
| Displacement | 127.6 in³ | 149 in³ |
| Rated Engine Speed | 2600 rpm | 2400 rpm |
| Engine Power (Gross) | 65.9 hp | 60 hp |
| PTO Power | 51.9 hp | 52 hp |
| Engine Emissions Constraints | Tier 4 | Not Published |
| Cooling System Type | Liquid | Liquid-cooled |
| Air Cleaner | Dual element | Dry type with safety element |
| Fuel System | High-pressure common rail direct injection | Direct injection, mechanical fuel pump |
| Alternator | 75 A, 12 V | 70 A |
John Deere 4066M Heavy Duty vs John Deere 4520: Quick Answers
- Which has more horsepower, the John Deere 4066M Heavy Duty or the John Deere 4520?
- The John Deere 4066M Heavy Duty leads on engine hp at 65.9 hp hp, compared to 60 hp hp for the John Deere 4520.
- Which has more PTO horsepower, the John Deere 4066M Heavy Duty or the John Deere 4520?
- The John Deere 4520 leads on pto hp at 52 hp hp, compared to 51.9 hp hp for the John Deere 4066M Heavy Duty.
- Which is heavier, the John Deere 4066M Heavy Duty or the John Deere 4520?
- The John Deere 4066M Heavy Duty leads on weight at 4,255 lb lb, compared to 3,700 lb lb for the John Deere 4520.
- Which has more loader lift capacity, the John Deere 4066M Heavy Duty or the John Deere 4520?
- The John Deere 4066M Heavy Duty leads on loader lift at 2,539 lb lb, compared to 2,486 lb lb for the John Deere 4520.
- Which has more three-point hitch lift capacity, the John Deere 4066M Heavy Duty or the John Deere 4520?
- They are effectively tied: both machines are rated at 2,500 lb lb for 3-pt lift (24 in).