| Manufacturer |
Bolinder-Munktell |
| Price |
- |
| Model |
BM-21 |
| Equipment Type |
Standard-Tread Tractors |
| Factory |
Eskilstuna, Sweden |
BOLINDER-MUNKTELL BM-21 POWER
ENGINE DETAIL
The Bolinder-Munktell BM-21 features a robust 2-cylinder diesel engine with a 5.3 L displacement, offering a moderate power output of 43 hp at a low rated RPM of 1050, which enhances torque at low speeds, beneficial for heavy agricultural tasks. Its liquid-cooled system requires a coolant capacity of 22.1 L, which aids in maintaining optimal operating temperatures, but requires regular maintenance to prevent overheating. The electric starter with 24 volts improves reliability, especially in colder conditions, but could pose challenges in terms of battery maintenance and weight considerations.
| Description |
Bolinder W5/diesel/2-cylinder/liquid-cooled |
| Displacement |
323.4 ci/5.3 L |
| Bore/Stroke |
5.91x5.91 inches/150 x 150 mm |
| Power |
43 hp/32.1 kW |
| Rated RPM |
1050 |
| Starter |
electric |
| Starter volts |
24 |
| Oil capacity |
11.1 qts/10.5 L |
| Coolant capacity |
23.3 qts/22.1 L |
BOLINDER-MUNKTELL BM-21 ENGINE
The Bolinder-Munktell BM-21 tractor features a robust 5.3L 2-cylinder diesel engine, which provides excellent torque for heavy-duty applications but may have a limited power output compared to modern multi-cylinder engines. The fuel tank capacity of 19.8 gallons (74.9 liters) enables extended operational time in the field, making it suitable for longer agricultural tasks without frequent refueling. However, the simplicity of its design may pose challenges in parts availability and service compared to newer tractors with advanced technology integration.
| Description |
Bolinder 5.3L 2-cyl diesel |
| Fuel tank |
19.8 gal/74.9 L |
TRANSMISSION
The Bolinder-Munktell BM-21 features a straightforward transmission system with 5 forward gears and 1 reverse gear, providing adequate versatility for general farming tasks. The simplicity of the gear selection can enhance ease of operation, making it user-friendly for less experienced operators. However, the limited gear range may pose challenges in navigating steep terrain or varying load conditions, where a more expansive gear selection could improve efficiency and performance.
| Type |
gear |
| Gears |
5 forward and 1 reverse |
MECHANICAL
The Bolinder-Munktell BM-21 tractor features a simple 4x2 2WD chassis, which provides basic traction suited for light agricultural tasks but may struggle on uneven terrain or during wet conditions. The manual steering offers direct control but requires physical effort, which could be a drawback during prolonged use. Its 5-speed gear transmission allows for versatility in speed, making it suitable for different applications, though the lack of advanced transmission systems could impede efficiency in heavy-duty operations.
| Chassis |
4x2 2WD |
| Steering |
manual |
| Cab |
Open operator station. |
| Transmission |
5-speed gear |
POWER TAKE-OFF (PTO)
BOLINDER-MUNKTELL BM-21 TIRES
The Bolinder-Munktell BM-21 tractor features front tires sized 7.50x18 and rear tires 13x30, providing a solid balance for agricultural applications. Its tire configuration offers good traction and stability; however, the narrower front tires may present challenges in muddy conditions or uneven terrain. Overall, it is well-suited for light to medium-duty farm tasks but may require careful handling on steep or heavily saturated fields.
| Ag front |
7.50x18 |
| Ag rear |
13x30 |
DIMENSIONS
| Wheelbase |
80.9 inches/205 cm |
| Length |
128 inches/325 cm |
| Width |
71.7 inches/182 cm |
| Height (steering wheel) |
72.8 inches/184 cm |
| Height (hood) |
59.8 inches/151 cm |
| Weight |
5897 lbs/2674 kg |
| Front tread |
52.4 inches/133 cm |
| Rear tread |
57.1 inches/145 cm |
DIMENSIONS & TIRES
The Bolinder-Munktell BM-21 has a wheelbase of 80.9 inches, contributing to stability during operation, especially on uneven terrain. Weighing 5897 lbs enhances traction but may limit maneuverability in tight spaces. The tire specifications (7.50x18 front, 13x30 rear) suggest good flotation and grip, making this tractor suited for diverse agricultural applications, though it may challenge transport on narrower paths due to its dimensions.
| Wheelbase |
80.9 inches/205 cm |
| Weight |
5897 lbs/2674 kg |
| Front tire |
7.50x18 |
| Rear tire |
13x30 |
ELECTRICAL
| Charging system |
generator |
| Batteries |
4 |
| Battery volts |
6 |
