Maikeyier is a Chinese factory supplier of combine harvester parts, with deep expertise in the field of combine harvester engine parts for Kubota, Yanmar, Lovol, and World. We are committed to providing solutions to the problems of reduced engine power and soaring fuel consumption caused by high-load, high-dust, and high-temperature field operating conditions, as well as offering high-quality, one-stop engine parts supply services to the global agricultural aftermarket.
Popular Combine Harvester Engine Parts
Maikeyier maintains a full stock of replacement engine parts for all series of Kubota, Yanmar, and other combine harvesters, with a production lead time of 10-25 days.
Filter Elements
Diesel filter: Protects the fuel injection system.
Oil filter: Protects internal engine components.
Air filter: Protects cylinders and piston rings.
Hydraulic filter: Protects the hydraulic system.
Cooling Components
Water pump: Drives coolant circulation to maintain normal engine operating temperature.
Radiator (cooling tank): Dissipates heat to prevent engine overheating.
Water hoses: Coolant circulation piping.
Thermostat: Controls the coolant circulation path to regulate engine temperature.
Fuel System Components
Injector: Atomizes high-pressure fuel into the cylinder to ensure combustion efficiency.
Fuel pump (supply pump): Delivers fuel from the tank to the high-pressure pump.
Fuel lines: Fuel delivery piping.
Fuel tank cap: Seals the tank and maintains fuel system pressure.
Combine Harvester Engine Parts Classification
Maikeyier supplies a full range of engine parts, including cylinder block assemblies, pistons, piston rings, crankshafts, connecting rods, valves, valve seats, injectors, fuel pumps, water pumps, fan blades, pulleys, seals, gaskets, filter elements, and more – covering all engine wear parts and overhaul components.
Engine Internal Parts
Component | Function | Common Failures |
Cylinder block | Engine skeleton, carries all moving parts | Cracks, excessive wear |
Piston | Reciprocates in the cylinder, converting combustion heat into mechanical energy | Skirt wear, burned crown |
Piston ring | Seals the cylinder, scrapes oil, conducts heat | Wear, breakage, loss of tension |
Crankshaft | Converts piston reciprocation into rotary power output | Journal wear, bending |
Connecting rod | Connects piston to crankshaft, transmits power | Bending, deformation, bearing shell wear |
Cylinder liner | Wear-resistant inner surface of the cylinder, replaceable | Excessive wear, scoring |
Engine Maintenance Parts
Component | Function | Recommended Replacement Interval |
Oil filter | Filters impurities from engine oil, protects crankshaft and bearing shells | Every 250-300 hours |
Fuel filter | Filters impurities and water from fuel | Every 200 hours |
Air filter | Filters dust from intake air, protects cylinders | Blow clean every 8 hours in dusty conditions |
Gasket kit | Seals mating surfaces of various components to prevent leakage | Replace during overhaul |
Seal | Seals lubricating oil on rotating components | Replace when leakage occurs |
Cooling System Parts
Component | Function | Common Failures |
Radiator | Dissipates heat from coolant to the air via cooling fins | Clogging, leakage, deformed fins |
Water pump | Drives coolant circulation between engine and radiator | Seal failure, bearing damage, water leakage |
Fan blade | Accelerates airflow through the radiator to improve cooling efficiency | Deformation, breakage, looseness |
Thermostat | Regulates coolant circulation path based on temperature | Sticking, failure |
Fuel System Parts
Component | Function | Common Failures |
Fuel pump | Delivers fuel from tank to high-pressure pump | Insufficient pressure, no fuel delivery |
Injector | Atomizes high-pressure fuel into the cylinder | Poor atomization, dripping, sticking |
Nozzle | Core precision mating pair of the injector | Wear, clogging, incorrect opening pressure |
Fuel line | Connects high-pressure pump to injector | Cracking, joint leakage |
How to Choose Combine Harvester Engine Parts?
Engine parts are the most failure-prone components in the harvester system and have the strictest quality requirements. Material and process, cost-performance, and machine compatibility are the primary factors to consider in procurement.
Material and Process
Internal engine parts (pistons, cylinder liners, crankshafts, etc.) have extremely high requirements for material and process. Inferior parts use low-grade materials and inadequate heat treatment, leading to rapid wear, deformation, or even fracture after installation.
Key selection points:
- Are core parts such as pistons and cylinder liners made of high-quality alloy steel or wear-resistant alloy cast iron?
- Is there a complete heat treatment process (quenching, tempering, carburizing, etc.)?
- Does machining precision meet original standards (dimensional tolerances, surface roughness)?
Brand and Model Compatibility
Harvester engine parts are not universal. Even within the same brand, different models may use different engine types.
Key selection points:
- Confirm the harvester brand and specific model.
- Confirm the engine model (e.g., Kubota V2203, Yanmar 4TNV98, etc.).
- Verify the part number to ensure precise matching.
Price and Cost-Performance
OEM engine parts and aftermarket parts differ greatly. For most high-frequency replacement items, high-quality aftermarket parts offer far better cost-performance than OEM parts, without affecting overall engine performance or service life.
Key selection points:
- Don’t just compare the lowest price – compare price advantage at the same quality level.
- For high-frequency replacement items (filters, seals, etc.), brand requirements can be relaxed in favor of quality aftermarket parts.
- For core internal parts (pistons, cylinder liners, crankshafts, etc.), prioritize suppliers with manufacturing capability.
Where to Buy?
Currently, there are three channel sources for harvester engine parts in the aftermarket: OEM-authorized dealers, specialized engine parts suppliers, and comprehensive agricultural parts suppliers. Choosing a comprehensive supplier with manufacturing capability and a sound quality control system can significantly reduce procurement and management costs.
Comparison | OEM Parts Supplier | OEM-Equivalent / Aftermarket Supplier | Comprehensive Supplier |
Quality assurance | Guaranteed but at higher cost | Focused on one brand’s engine parts | Covers multi-brand, multi-category parts supply chain |
Combine Harvester Engine Parts Supplier – Maikeyier
Maikeyier is a harvester parts factory supplier with forging capability at its core, and we also integrate a comprehensive supply chain. In the engine parts sector, we cover wear parts and repair components for diesel engines used in all series of Kubota, Yanmar, Lovol, and World harvesters.
Engine Parts Supply Scope
Internal engine parts: Cylinder liners, pistons, piston rings, crankshafts, connecting rods, etc.
Maintenance parts: Oil filters, diesel filters, air filters, gasket kits, oil seals.
Cooling system parts: Water pumps, radiators, fan blades, thermostats, water hoses.
Fuel system parts: Fuel supply pumps, injectors, nozzles, high-pressure fuel lines.
Maikeyier Engine Parts Advantages
Core parts are quality-controlled from the source; every batch is traceable.
Full series of engine parts for Kubota, Yanmar, Lovol, and World.
From internal parts to the fuel system – full coverage of all engine part categories.
Fast delivery: lead time of 5-25 working days.
Maikeyier Complete Machine Parts
In addition to engine parts, we also supply header cutter bars, feeding systems, sheet metal covers, hydraulic systems, running chassis, and more – with thousands of products in stock at our warehouse.
Combine Harvester Feeding System Parts
Combine Harvester Threshing System Parts
Combine Harvester Chassis Parts
Combine Header
FAQ about Harvester Engines
A: Engine oil and the oil filter are recommended to be changed every 250-300 hours.
A: Symptoms include:
- significant power loss, weak operation;
- blue or white smoke from the exhaust;
- excessive crankcase blow-by with heavy fumes from the breather;
- abnormal knocking noises during operation;
- noticeably increased oil consumption. If these symptoms occur, stop the engine immediately to prevent further damage.
A:
- Worn or aged mechanical seal (most common);
- cracks in the pump housing;
- loose mounting bolts or damaged gasket.
When leakage is found, first check the seal – if damaged, replace the water pump assembly or seal kit. If the housing is cracked, replace the pump. Regularly check coolant level and line sealing to prevent leaks.
A:
- Radiator fins blocked by straw, dust, or mud;
- low coolant level or leakage;
- water pump failure or belt slipping;
- thermostat stuck closed;
- radiator cap seal failure.
If overheating occurs, stop the engine and let it cool naturally – do not open the radiator cap immediately. After cooling, check each cause one by one.
A:
- Reduced cylinder sealing, resulting in power loss and increased fuel consumption;
- oil enters the combustion chamber, causing blue smoke and oil burning;
- poor cylinder wall lubrication accelerates liner wear, which in severe cases can lead to cylinder scoring or bearing seizure.
When replacing piston rings, it is recommended to also inspect the cylinder liner and replace it if necessary.
A:
- Hard starting and unstable idle;
- power loss and weak operation;
- black smoke from exhaust and increased fuel consumption;
- rough engine operation with abnormal knocking sounds.
If these occur, remove and inspect the injector, test opening pressure and atomization on a test bench, and replace if out of specification.
A: The core difference is price. Most aftermarket parts today can achieve quality comparable to OEM parts.
A:
- Change the oil and filter to prevent old oil from corroding internal parts;
- fill the fuel tank to prevent rust inside;
- remove the battery and store it in a dry place, recharging periodically;
- store the engine in a dry, ventilated area and cover it;
- turn the crankshaft manually a few turns every 1-2 months to prevent piston rings from sticking to the cylinder wall.
A: Maikeyier’s engine parts cover diesel engines used in all series of Kubota, Yanmar, Lovol, and World harvesters.
A: Engine parts support mixed-lot orders; different categories can be combined with flexible MOQ. Maintenance items such as filters and seals support small-batch orders; internal parts such as pistons and cylinder liners can be customized to your required quantity.
Whether you need internal engine parts, filters, cooling system components, or fuel system parts, Maikeyier can provide you with high-quality, cost-effective engine parts solutions. Please contact us for a complete engine parts catalog and targeted quotation.