Cummins QSL9 / ISLe Series Fuel Pipes
Cummins QSL9 / ISLe Series Fuel Pipes
Applicable Equipment
Dongfeng Kinland heavy-duty trucks, Lingong/Longgong excavators, XCMG loaders, marine main engines.
Common Part Numbers
4932393 (fuel supply pipe), 4988666, 3974172 (fuel return pipe)
Material & Craftsmanship
Made of cold-drawn precision seamless steel tubes with black oxidation or electrophoretic coating on the surface for excellent rust and corrosion resistance. The joints are CNC-machined to high dimensional accuracy.
Features & Advantages
Dedicated for high-pressure common rail systems
Most QSL9 engines are electronically injected units, so the fuel pipes are designed to withstand extreme working pressure. The high-pressure pipes connecting common rail to injectors feature thicker wall thickness.
Outstanding vibration resistance
The pipeline layout follows OEM fluid dynamics design standards, effectively lowering the risk of metal fatigue fracture caused by high-frequency engine vibration.
Superior sealing performance
The joints adopt spherical or conical sealing structures to eliminate leakage of high-pressure diesel fuel.
Cummins NT855 Series Fuel Pipes
Applicable Equipment
Komatsu bulldozers (D85/D155), old-model rotary drilling rigs from Sany and Zoomlion, large diesel generator sets, heavy-duty trucks.Common Part Numbers3017142 (fuel supply pipe for injectors), 3017143 (fuel return pipe), 3035050 series.
Material & Craftsmanship
Mainly made of galvanized steel pipe or stainless steel; some connecting sections adopt high-temperature and oil-resistant nitrile rubber hoses.
Features & Advantages
Perfect match for PT fuel system
The NT855 engine adopts the classic PT fuel system. Its fuel pipes are mainly used for fuel delivery with precisely calibrated pipe diameters to guarantee stable fuel flow.
Excellent resistance to harsh environments
Specially designed for dusty, high-vibration working conditions such as mines and construction sites, with thickened pipe walls to avoid deformation.
Wide compatibility
As one of Cummins’ most classic engine models, its pipeline spare parts feature strong universality for convenient maintenance and replacement.
Cummins M11 Series Fuel Pipes
Applicable Equipment
Heavy-duty tractors, cement mixers, imported excavators and oilfield equipment.
Common Part Numbers
3089821 (fuel return manifold), 3102957, 3090002
Material & Craftsmanship
Constructed from high-strength alloy steel with Dacromet coating on the surface, delivering corrosion resistance several times higher than ordinary galvanized steel pipes.
Features & Advantages
Precision return fuel manifold design
The complex fuel return manifold of M11 efficiently collects excess fuel from each cylinder and regulates fuel temperature to eliminate vapor lock.
Compatible with electronic control systems
Fits both mechanical versions and CELECT electronic control variants with precisely defined interfaces.
Outstanding durability
Commonly deployed for long-distance logistics transport, the reinforced pipe material withstands thermal expansion and contraction under prolonged continuous operation.
Cummins K19 Series Fuel Pipes
Applicable Equipment
Large generator sets (widely used), heavy mining trucks, auxiliary engines for large vessels.
Common Part Numbers
3052885 (fuel connecting pipe), 3061956, 3010947
Material & Craftsmanship
Thick-walled seamless steel pipes; stainless steel braided high-pressure hoses are adopted for partial high-pressure connecting sections.
Features & Advantages
High-flow fuel delivery
With a 19-liter displacement, the K19 engine consumes a large volume of diesel fuel. Its fuel supply and return pipes feature larger inner diameters to guarantee sufficient fuel supply.
Industrial-grade reliability
Fuel pipes for generator sets are manufactured with extremely high reliability standards to avoid unexpected shutdowns caused by pipe rupture.
Resistance to high-pressure pulses
The PT fuel system on K19 operates under relatively high pressure, and all pipe connectors are specially reinforced.
Cummins K38 / K50 Series Fuel Pipes
Applicable Equipment
Megawatt-class large diesel generator sets, ultra-large mining haul trucks (e.g. Terex TR50 / TR100), large dredgers, oilfield fracturing pump trucks.
Common Part Numbers
3634302 (flexible hose), 3059861 (fuel manifold), 3065203
Material & Craftsmanship
Fabricated from industrial-grade stainless steel or high-strength carbon steel. Given the massive engine size, certain connecting pipes adopt special flexible silicone hoses or stainless steel braided hoses with PTFE liners to accommodate thermal deformation of large engine blocks.
Features & Advantages
Optimized for ultra-large displacement
K38 (38L) and K50 (50L) are heavy-duty flagship engines equipped with an extensive, complex fuel piping system split into low-pressure delivery lines and high-pressure injection lines.
High temperature & high pressure resistance
For generator set applications, the fuel pipes must withstand sustained high temperatures generated during full-load continuous operation.
Flexible vibration absorption
To absorb vibration from V-type engine blocks, flexible hoses (such as Part No.3634302) are installed at key joints like fuel pump connections to prevent rupture of rigid pipe connections.