Agricultural Diesel Engines — Tractor & Farm Machinery Engines UK
Tractor engines, combine engines, and farm machinery diesel supply. Perkins, Cummins, Deutz, Yanmar, and Kubota. When the machinery has to work — we have the engine to make it happen.
Agricultural diesel engines work harder than almost any other application — extended hours at full load during harvest, weather-dependent urgency, and machinery that often dates back decades. Getting an agricultural engine wrong costs you a window you can't recover. Commercial Engines supplies reconditioned, remanufactured, and new agricultural diesel engines for tractors, combine harvesters, telehandlers, irrigation pumps, and farm machinery of all types.
We stock Perkins 1000 and 1100 series, Cummins QSB and QSC units, Deutz BF4 and BF6 air-cooled series, Yanmar and Kubota compact agricultural diesels, and John Deere PowerTech engines. Whether you need a reconditioned Perkins 1104 for a Massey Ferguson 5455 or a replacement Cummins QSB 6.7 for a Case IH 8010 combine, we'll confirm the fit, fix the price, and despatch fast.
When the Combine Is Down and the Crop Won't Wait
Agricultural engine failure during harvest is among the most costly situations in any industry. A combine harvester generating £2,000 a day off the field for a week costs more than most engine replacements — and unlike fleet vehicles, the window for repair closes when the weather turns.
We prioritise agricultural engine supply during harvest season. Our stocked agricultural engines are despatched same-day on orders before 12pm, with next-day farm delivery available. We'll confirm the engine match before anything moves — because a wrong engine wastes the time you don't have.
- Same-day despatch in harvest season
- Engine match confirmed before despatch
- Reconditioned and new supply available
- Farm and depot delivery arranged
Agricultural Engine Supply by Make
We stock and source agricultural diesel engines across all major brands used in UK farm machinery. Our agricultural engine range covers: Perkins 1000 Series (1004 and 1006) and 1100 Series (1104 and 1106) for Massey Ferguson, JCB, and other farm machinery; Cummins QSB 4.5 and 6.7 for modern combine harvesters and large-HP tractors; Deutz BF4M and BF6M air-cooled engines for Deutz-Fahr and Same machinery; Yanmar and Kubota compact diesels for smaller agricultural equipment.
- Massey Ferguson: Perkins 1104, 1106, and Sisu/AGCO Power engines
- John Deere: PowerTech 4.5L and 6.8L series
- Case IH / New Holland: Cummins QSB and FPT engines
- Fendt: MAN and AGCO Power units
- JCB: Perkins 1004 and 1104 engines
- Claas: Mercedes-Benz OM900 series for combines
Planning Ahead? We Supply Through the Winter Servicing Window
Not every agricultural engine replacement is an emergency. Many fleet managers and farm operators use the winter servicing window — October through February — to address engine replacements planned during the season. We're set up for both: emergency in-season supply and planned winter replacements.
We can hold engines against a confirmed order, schedule delivery at your preferred date, and work to your servicing schedule rather than ours. If you're planning an engine replacement during the winter, enquire now to secure stock and price.
- Winter servicing window planning — stock reserved on order
- Scheduled delivery at your preferred date
- Workshop-ready engines — ready to fit on arrival
Combine Harvester Engine Supply
Combine harvester engine failure is a separate category from most agricultural engine replacements — the urgency is acute, the engines are large, and the cost of downtime is severe. We hold stock of the most common combine engine types, and we've built our supply model around the reality that combine enquiries often arrive on a Sunday afternoon during harvest. Call us whenever you need — we respond to combine enquiries seven days a week.
Agricultural Engine Options — Choosing the Right Condition
For farm machinery, the right condition class depends on the machine age, value, and season timing.
| Option | Cost | Warranty | Lead Time | Best Agricultural Use |
|---|---|---|---|---|
| New | Highest | OEM warranty | Variable | New machinery, warranty compliance |
| Reconditioned | Mid-range | 12 months parts & labour | 2–5 working days | Most tractors and combines |
| Remanufactured | Mid-high | 12–24 months P&L | 1–2 weeks | High-value combines, max duty cycle |
| Used | Lowest | 3 months | From stock | Lower-value or older farm machinery |
*We stock reconditioned agricultural engines year-round and prioritise harvest-season despatch. Call to confirm current availability.
Engine Brands We Supply
We stock and supply engines from the world's leading diesel manufacturers. Call with a make, model, or engine code and we'll confirm availability and give you a fixed price.
Perkins
1004, 1006, 1104, 1106 — the core agricultural engine range for Massey Ferguson, JCB, and most UK farm machinery.
Cummins
QSB 4.5, QSB 6.7, QSC 8.3 — for Case IH combines, large-HP tractors, and irrigation equipment.
Deutz
BF4M and BF6M air-cooled series — Deutz-Fahr, Same, and Lamborghini tractor applications.
Yanmar
Compact agricultural diesel range for smaller tractors, compact utility vehicles, and irrigation pumps.
Kubota
V and D series compact diesel for sub-compact tractors, utility vehicles, and compact agricultural machinery.
John Deere
PowerTech 4.5L and 6.8L — John Deere tractor and combine supply through our sourcing network.
Applications & Use Cases
Wherever a diesel engine is critical to operations — on the road, on the water, in the field, or in a plant room — we have the right engine for the job.
Tractors
Reconditioned and new tractor engines for all makes — Massey, JD, Fendt, Case, New Holland.
Combine Harvesters
Emergency and planned engine supply for Claas, Case IH, John Deere, and New Holland combines.
Telehandlers
Perkins and Cummins telehandler engines for JCB, Manitou, and Merlo machinery.
Irrigation Equipment
High-output diesel engines for irrigation pump sets and field drainage machinery.
Agricultural Plant
Trailed and self-propelled machinery — baler engines, spreaders, sprayer units.
Agricultural Gensets
Standby and prime power diesel engines for rural power generation applications.
We had a Perkins 1104 fail on our MF 5455 in week two of harvest. I called Commercial Engines on a Saturday morning and they had a reconditioned engine confirmed and priced by 10am. It arrived on Monday and we were back cutting by Tuesday afternoon. That kind of response makes a real difference.