The John Deere 5125R is a powerful and highly regarded utility tractor in the 5R series, designed for demanding agricultural applications.

It is a utility tractor within John Deere’s 5R series, known for its compact size, robust performance, and advanced features for agricultural applications .

It is powered by a 93.2 kW (125 hp) John Deere 4.5L 4-cylinder PowecherT PWX engine, here are the specs of John Deere 5125R:

John Deere 5125R Specifications:

Engine:

John Deere 4.5L 4-cylinder PowerTech PWX diesel engine.

Rated power: 93.2 kW (125 hp).

Transport Power Management (TPM) boost power: 100.7 kW (135 hp).

Max torque: 534 Nm at 1,500 rpm.

Emission standards: iT4 met with EGR, DOC, DPF — no additives required.

Engine speed at rated power: 2,200 rpm.

Fuel tank capacity: 47 gallons (177.9 L).

Transmission

Available transmissions include 16-speed (4-speed power shift) and 32-speed (8-speed power shift) options.

Also available is a 16/16 CommandQuad manual transmission variant.

The transmission supports 40 km/h top road speed with power shift options.

Hydraulics and PTO:

Open center or optional load-sensing Pressure-Flow Compensated (PFC) hydraulic systems.

Hydraulic pump flow ranges from 25.4 gpm up to 30.9 gpm optional.

Rear PTO independent with electro-hydraulic clutch.

PTO speeds: 540/540E/1000 rpm.

Dimensions and Weight:

Wheelbase: approximately 88.6 inches (225 cm).

Weight: around 9,480 lbs (4,300–4,450 kg), depending on configuration.

Standard tires: Front 480/65R24 and Rear 540/65R38.

Other Features:

Four-wheel drive with electro-hydraulic rear differential lock and optional front diff lock.

Cab comes standard with air conditioning, optional panoramic roof and mechanical suspension.

Power steering and hydraulic wet disc brakes.

Optional rear trailer hydraulic or pneumatic brakes.

Load sensing hydraulic valves and electro-hydraulic draft sensing hitch.

How does the John Deere 5125R perform in terms of fuel efficiency and emissions standards?

The John Deere 5125R performs very well in terms of fuel efficiency and emissions standards due to its advanced 4.5L PowerTech PWX 4-cylinder diesel engine. Key points include:

 Fuel Efficiency:

The engine consumes approximately 265–287 g/kWh of fuel, which is considered outstanding in its class.

This is notably better than the 300+ g/kWh typical for many comparable tractors, leading to significant fuel savings over time.

Emissions Standards:

It meets Tier 4 / iT4 / Stage IIIB emissions standards without the need for fuel additives.

This is achieved by combining Cooled Exhaust Gas Recirculation (EGR), an intercooler, and a Diesel Particulate Filter (DPF), ensuring clean and environmentally friendly operation.

Power Management:

The model features Transport Power Management (TPM), which provides an extra 10 hp boost during transport, enhancing power density while maintaining efficiency.

Technology:

The engine uses a common rail fuel injection system that further improves fuel efficiency and reduces emissions by optimizing combustion.

Operator-friendly features:

The tractor includes an Auto Mode that automatically optimizes engine and transmission settings for maximum fuel efficiency based on load conditions.

The John Deere 5125R leverages modern engine technology and emissions controls to deliver excellent fuel economy while complying with stringent environmental standards, making it a cost-effective and eco-conscious choice for agricultural work.

Price:

Original price in 2019: approximately $99,000.

Around $104,000 in 2021, depending on options and configuration.

Reviews & Problems:

The tractor is praised for its fuel efficiency, advanced emissions control technology, and power density, making it suitable for diverse farm tasks.

Its Transport Power Management (TPM) boosts power under load, aiding transport and heavy-duty jobs.

Reviewer videos highlight its comfort features including heated and air-conditioned cab, loader compatibility, and multiple transmission options for ease of operation.

Common minor issues reported include cosmetic wear such as scuffs but generally seen as reliable and efficient.

Loader compatibility, multiple hydraulic circuits, and good PTO power tested at about 125 hp ensure versatility and strong performance.

Overall, the John Deere 5125R is regarded as a robust, fuel-efficient, and well-equipped tractor with modern emission systems, ideal for demanding farm use and offering advanced transmission options for operational flexibility.