WEICHAI / Weichai Power Industrial Diesel Engines

Heavy-duty industrial diesel power units WEICHAI / Weichai Power (WP10, WP12 and WD615 series) engineered for construction machinery, haulage vehicles and industrial stations: engineering selection according to project parameters.

Weichai WP10 series diesel engines

Heavy-duty inline six-cylinder Weichai WP10 diesel powertrains with 9.7 liter displacement engineered for heavy trucks, haulers and construction machinery. Engines deliver exceptional torque at low rotational speeds and high structural endurance under continuous duty cycles.

Displacement of 9.7 liters with power ratings extending from 270 up to 380 hp
High-pressure electronically controlled Common Rail fuel injection apparatus
Rigid iron engine block structure with replaceable wet-type cylinder liners
Optimized cooling pathways designed for prolonged high-load operation cycles

Weichai WP12 series heavy powertrains

Premier heavy-duty Weichai WP12 diesel power units with 11.6 liter displacement engineered for long-haul tractors, mobile cranes and heavy excavators. Equipped with wastegate turbochargers and charge air cooling to maximize thermal efficiency and decrease fuel consumption.

Displacement of 11.6 liters delivering power outputs from 375 to 480 hp range
Four-valve per cylinder architecture providing efficient combustion scavenging
Forged alloy steel crankshaft with induction-hardened bearing journal zones
Compliance with Euro V and Stage IV off-highway exhaust emission guidelines

Weichai WD615 series industrial engines

Time-proven Weichai WD615 inline diesel units based on heavy Steyr architecture, widely installed on wheel loaders, bulldozers, motor graders and dumpers. The mechanical layout offers outstanding serviceability, component simplicity and robust operation across tough fuels.

Displacement of 9.726 liters with power ratings from 220 to 336 horsepower
Reliable mechanical and electronic in-line plunger fuel injection systems
Individual cylinder head layout enabling straightforward repair access
Comprehensive dimensional standardization of connecting rods and bearings

Weichai cylinder and piston group assemblies

Precision cylinder and piston group elements for Weichai WP10, WP12 and WD615 engines: cylinder liners, pistons featuring specialized graphite skirt coatings, piston pins and ring packs. Every component is machined to strict factory tolerance and clearance limits.

Centrifugally spun alloyed iron wet cylinder liners with honed inner bores
Thermal-resistant aluminum alloy pistons with internal oil cooling galleries
High-durability compression and oil scraper ring sets with PVD coatings
Calibrated standard and oversize repair dimensional classes for rebuilding

Weichai fuel injection equipment and pumps

Fuel system elements for Weichai engines: Common Rail electromagnetic injectors, high-pressure injection pumps, fuel accumulation rails with rail pressure sensors and relief valves. Designed to maintain stable injection pressure and precise cyclic metering.

High-pressure multi-hole fuel injectors ensuring ultra-fine spray dispersion
Fuel injection pumps with induction-hardened plungers for high durability
Fuel rail pressure transducers featuring swift microsecond response times
Multi-stage fuel filtration elements and water separator replacement bowls

Weichai turbochargers and coolant pumps

Forced induction and liquid cooling assemblies for Weichai engines: wastegate turbochargers, centrifugal coolant pumps, dual thermostats and plate oil coolers. Components keep engine operating temperatures within tight parameters under heavy continuous duty.

Exhaust gas turbochargers with high-nickel alloy turbine housing structures
High-speed precision rotor balancing tested at up to 150,000 revolutions/min
Centrifugal engine coolant pumps with long-life silicon carbide shaft seals
Stainless plate-type oil coolers delivering high heat dissipation capacity

Weichai engine technology and heavy powertrain architecture

Heavy industrial diesel powerplants from Weichai Power are engineered at advanced manufacturing complexes in Weifang, demonstrating record-setting base thermal efficiency exceeding 53 percent.

The comprehensive power range spans from 36.8 kilowatts on light industrial installations up to 2800 kilowatts on ultra-heavy mining haulers and deep drilling rigs.

The inline six-cylinder architecture combines a rigid alloy iron cylinder block, replaceable wet liners and an induction-hardened forged crankshaft designed for high mechanical resilience.

Weichai power units are optimized for prolonged continuous duty in harsh climates and remote mining operations, fully complying with Euro V and Non-Road Stage IV emissions regulations.

Integral plate-type oil cooling units and high-flow coolant galleries eliminate overheating hazards during peak ambient thermal conditions.

Cylinder block engineering and piston group rebuild guidelines

The cylinder and piston assemblies of Weichai WP10, WP12 and WD615 engines are dimensioned for heavy durability with major overhaul intervals exceeding 15,000 operational hours.

High-temperature aluminum-silicon alloy pistons integrate an internal circular oil cooling gallery supplied by pressurized base oil jets mounted in the engine block. Piston skirts feature a bonded graphite coating reducing frictional drag.

Replaceable wet cylinder liners are centrifugally manufactured from high-grade alloy iron and finished with plateau honing. This surface geometry maintains a stable lubricant boundary layer and minimizes engine oil consumption.

Rebuild packages provide calibrated standard dimensions as well as precision oversize repair dimensions.

Common Rail high-pressure fuel injection and filtration apparatus

The electronically controlled Common Rail fuel injection system on Weichai powertrains generates injection pressures reaching 1800 to 2000 bar.

Solenoid injectors deliver multiple pilot, main and post-injection events per combustion cycle, ensuring smooth cylinder pressure rise, lowered combustion noise and reduced impact stress on piston pins and connecting rod bearing inserts.

Fuel system reliability depends on multi-stage fuel purification. Standard configurations incorporate a primary heated fuel filter with water separation alongside secondary fine filtration elements.

Scheduled maintenance protocols require filter element replacement at regular intervals between 250 and 500 operating hours.

Valvetrain layout and turbocharging configuration

Weichai WP10 and WP12 models feature a four-valve per cylinder arrangement (two intake and two exhaust valves), optimizing fresh charge intake velocity and accelerating exhaust gas evacuation.

Valve bodies are manufactured from heat-resistant alloy steel with stellite-welded seat faces, operating within sintered metal valve guides for superior wear protection.

Exhaust turbochargers with wastegate regulation ensure rapid boost pressure rise without turbo lag at lower engine operating speeds. High-speed turbine rotors are balanced on precision dynamic equipment with residual imbalance tolerances down to fractional micron levels.

Liquid cooling circuits, lubrication and thermal management

The closed-circuit liquid cooling system utilizes a heavy-duty gear-driven centrifugal pump and a dual-element thermostat assembly.

This configuration enables rapid engine warm-up from cold starts while maintaining stable coolant operating temperatures between 80 and 95 degrees Celsius regardless of external ambient temperature fluctuations or shifting duty loads.

Engine lubrication is sustained by a full-flow oil pump, multi-plate oil-to-water heat exchanger and centrifugal bypass oil filters. High-capacity filtration shields crankshaft journals and turbocharger sleeve bearings from micro-abrasive contamination even under severe dust conditions.

Engineering component selection by engine serial number

Accurate identification of Weichai replacement components requires data from the original factory metal nameplate attached to the cylinder block.

The nameplate identifies the exact engine model designation (such as WP10.380E32 or WP12.430E50), unique engine serial number (Engine SN) and manufacturing specification codes.

Production revisions across specific model years may incorporate distinct variations in crankshafts, camshafts, fuel injectors and cylinder head gasket thicknesses.

Component selection based on the verified engine serial number prevents mounting mismatches and ensures timely delivery of matching assemblies.

WEICHAI / Weichai Power and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of WEICHAI / Weichai Power and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.