| Manufacturer | Massey-Harris |
| Price | - |
| Model | Pacemaker |
| Equipment Type | Standard-Tread Tractors |
| Factory | Racine, Wisconsin, USA |
NEBRASKA TRACTOR TEST 266 2
| Description | Gasoline 4-speed 2WD August 10 - 19, 1936 Link: Nebraska Tractor Test 266 file Drawbar performance Gear 2 used for power test Gear 1 used for pull test |
| Belt power (max) | 29.1hp / 21.7kW |
| Belt fuel use (max) | 3.1gal/hour / 11.7l/hour |
| Max power | 19.76hp / 14.7kW |
| Max pull | 2878lbs / 1305kg |
NEBRASKA TRACTOR TEST 294 2
| Description | Gasoline Twin Power 4-speed 2WD October 25 - November 16, 1937 Link: Nebraska Tractor Test 294 file Drawbar performance Gear 3 used for power test Gear 1 used for pull test |
| Belt power (max) | 42.13hp / 31.4kW |
| Belt fuel use (max) | 4.2gal/hour / 15.9l/hour |
| Max power | 30.58hp / 22.8kW |
| Max pull | 3236lbs / 1467kg |
MASSEY-HARRIS PACEMAKER POWER
| Drawbar (claimed) | 16hp / 11.9kW |
| Belt (claimed) | 27hp / 20.1kW |
| Drawbar (tested) | 30.58hp / 22.8kW |
| Belt (tested) | 42.13hp / 31.4kW |
ENGINE DETAIL
The Massey-Harris Pacemaker features a gasoline-powered, 4-cylinder liquid-cooled vertical I-head engine with a displacement of 247.7 ci (4.1 L) and a bore/stroke ratio of 3.875x5.25 inches (98x133 mm), enhancing torque delivery for field applications. The dual RPM rating of 1200/1400 with the Twin Power option allows for flexibility in operational speed, optimizing fuel efficiency while maintaining performance. The substantial coolant capacity of 20 quarts (18.9 L) aids in effective temperature regulation, mitigating risks of overheating during prolonged use, which is crucial for heavy-duty tractor tasks.
| Description | Massey-Harris gasoline 4-cylinder liquid-cooled vertical I-head |
| Displacement | 247.7ci / 4.1L |
| Bore/Stroke | 3.875x5.25inches / 98x 133mm |
| Rated RPM | 1200/1400*Twin Power option |
| Coolant capacity | 20qts / 18.9L |
MASSEY-HARRIS PACEMAKER ENGINE
The Massey-Harris Pacemaker boasts a 4.1L 4-cylinder gasoline engine, offering a balance of power and efficiency suitable for medium-duty agricultural applications. With an 18-gallon (68.1L) main fuel tank and a 1.6-gallon (6.1L) auxiliary tank, it provides extended operating time, ideal for tasks that require sustained performance without frequent refueling. However, users should consider the implications of gasoline use on fuel economy and maintenance, as well as ensuring adequate fuel availability for longer jobs.
| Description | Massey-Harris 4.1L 4-cyl gasoline |
| Fuel tank | 18gal / 68.1L |
| Aux. fuel | 1.6gal / 6.1L |
TRANSMISSION
The Massey-Harris Pacemaker tractor's gear system features a straightforward configuration of 4 forward and 1 reverse gear, allowing for versatile operation in agricultural tasks. The mechanical dry disc clutch provides effective power transfer but may be prone to wear under heavy loads, necessitating regular maintenance. This tractor is ideal for smaller to medium-sized farming operations, where maneuverability and simplicity are advantageous, but it could encounter challenges in high-torque scenarios.
| Type | gear |
| Gears | 4 forward and 1 reverse |
| Clutch | mechanical dry disc |
MECHANICAL
The Massey-Harris Pacemaker's 4x2 2WD chassis offers excellent maneuverability for agricultural tasks, though it may struggle with traction on uneven terrain. The manual steering system provides a mechanical connection that can enhance operator feedback, but may require more physical effort during long hours of operation. With a 4-speed gear transmission, this tractor is suitable for standard fieldwork, though operators might find limited options for speed adjustments versus modern hydrostatic systems.
| Chassis | 4x2 2WD |
| Steering | manual |
| Cab | Open operator station |
| Transmission | 4-speed gear |
MASSEY-HARRIS PACEMAKER TIRES
The Massey-Harris Pacemaker tractor features front tires sized 6.00x16 and rear tires at 11.25x24, providing a balanced configuration for agricultural tasks. This tire setup enhances traction and stability, making it suitable for both fieldwork and maneuvering in tight spaces. However, operators should consider the limited ground clearance, which may pose challenges in uneven terrain or during heavy crop production.
| Ag front | 6.00x16 |
| Ag rear | 11.25x24 |
DIMENSIONS
| Wheelbase | 78inches / 198cm |
| Length | 122inches / 309cm |
| Height | 53inches / 134cm |
| Weight | 3700lbs / 1678kg |
DIMENSIONS & TIRES
The Massey-Harris Pacemaker tractor features a compact wheelbase of 78 inches (198 cm), which enhances maneuverability in tight agricultural spaces but may limit stability when towing heavy loads. Weighing 3,700 lbs (1,678 kg) provides a solid foundation for traction, particularly beneficial during field operations with its large rear tires (44x10) that improve soil grip. However, the smaller front tires (28x5) may lead to compromised handling on uneven terrains, making it crucial to assess the tractor's application to optimize performance.
| Wheelbase | 78inches / 198cm |
| Weight | 3700lbs / 1678kg |
| Front tire | 28x5 |
| Rear tire | 44x10 |
PACEMAKER SERIAL NUMBERS
| Location | On rear-left portion of tractor frame |
BELT PULLEY
| Diameter | 12inches / 30cm |
| Width | 6.25inches / 15cm |
| RPM | 832 |