This comparison evaluates the Komatsu D51 and Komatsu D37, both classified as Industrial tractors. We analyze horsepower ratings (gross and PTO), operating weight, hydraulic flow capacity, 3-point hitch lift capacity, transmission type, warranty coverage, and typical pricing signals. Both models serve similar use cases, so differences in specific specs may influence your decision based on property size, planned implements, and budget. Specs are compiled from manufacturer literature and dealer listings when available, and we update records as sources are verified.
| Specification | Komatsu D51 | Komatsu D37 |
|---|---|---|
| Engine & Power | ||
| Gross Horsepower | 119 HP | 89 HP |
| PTO Horsepower | 109.48 HP | 81.88 HP |
| Engine Manufacturer | Komatsu | Komatsu |
| Cylinders | 4 | 4 |
| Displacement | 4.5 L | 3.3 L |
| Fuel Type | Diesel | Diesel |
| Drivetrain & Transmission | ||
| Transmission Type | HST | HST |
| Drive Type | Crawler | Crawler |
| Forward Speeds | Variable Hydrostatic | Variable Hydrostatic |
| Reverse Speeds | Variable Hydrostatic | Variable Hydrostatic |
| PTO & Hydraulics | ||
The Komatsu D51 delivers 119 HP compared to 89 HP on the Komatsu D37, providing more power for demanding tasks. It also weighs 24,750 lbs vs 17,850 lbs.
Neither model is primarily a lawn tractor. Both can handle mowing with appropriate mower attachments, but they're designed for broader property maintenance tasks including loader work, tilling, and implement use.
The Komatsu D51 has a higher 3-point lift capacity (5,950 lbs vs 4,450 lbs), which generally correlates with better front loader capability. Loader compatibility: Yes - Integrated Blade.
| PTO Type | Live Independent PTO | Live Independent PTO |
| PTO Speed | 1000 | 1000 |
| Hydraulic Flow | 38 GPM | 28 GPM |
| Hydraulic Pressure | 4,060 PSI | 3,770 PSI |
| Remote Valves | 3 | 2 |
| Dimensions & Weight |
| Operating Weight | 24,750 lbs | 17,850 lbs |
| Length | 195.7 in | 168.5 in |
| Width | 110.2 in | 95.3 in |
| Height | 126.8 in | 118.1 in |
| Wheelbase | 108 in | 93 in |
| Ground Clearance | 17.3 in | 14.6 in |
| Hitch / Implements |
| 3-Point Category | Category II | Category II |
| Lift Capacity | 5,950 lbs | 4,450 lbs |
| Loader Compatibility | Yes - Integrated Blade | Yes - Integrated Blade |
| Warranty & Ownership |
| Powertrain Warranty | 3 years | 3 years |
| Bumper-to-Bumper | 1 years | 1 years |
| Pricing Signals | ||
| Typical Price | $315,000 | $200,000 |
| MSRP Min | $295,000 | $185,000 |
| MSRP Max | $335,000 | $215,000 |
Both models offer 3-year powertrain warranties. Warranty terms can vary by dealer and region, so confirm coverage details before purchase.
Before purchasing, verify dealer pricing and availability in your area, confirm current warranty terms, test-drive if possible, and assess which implements or attachments you'll need. Both specs and pricing can vary by region and dealer.