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The WEICHAI WP12 Compressor Pipeline Group is a complete set of precision-manufactured intake, water, oil, and intercooler pipelines for the air compressor system in WP12 heavy-duty diesel engines. As genuine WEICHAI Engine Parts, this compressor pipeline group ensures reliable air supply, stable lubrication, and efficient cooling for the air compressor across all WP12 variants from 336 HP to 550 HP.
The WEICHAI WP12 Compressor Pipeline Group is a complete assembly of intake, water, oil, and intercooler pipelines specifically designed for the air compressor system of the WP12 series diesel engine. The group includes the air compressor intake pipe (612630030033), the compressor intake funnel (612630110012), the air compressor water inlet pipe (612630030036), the twin-cylinder air compressor oil pipe (612630030037), and the compressor intercooler connection pipes.
The WEICHAI WP12 Compressor Pipeline Group is part of the WP12 engine’s gear transmission system, with the air compressor located at the front of the engine and driven by the gear train. The compressor pipeline group ensures that the air compressor receives a reliable supply of filtered air, engine coolant, and pressurized oil while effectively routing compressed air to the vehicle’s brake and pneumatic systems [4†L10-L12][4†L24-L25].
The WEICHAI WP12 Compressor Pipeline Group is available in multiple OEM part numbers for different engine configurations. Common references include 612630030033 (air compressor intake pipe), 612630110012 (compressor intake funnel), 612630030036 (air compressor water inlet pipe), 612630030037 (twin-cylinder air compressor oil pipe), 612630110366 (air compressor air pipe, OEM 1714411-00261-001), 1007713549 (air compressor air pipe, OEM 1714411-00440-001), 1000127028 (air compressor air pipe, OEM 1714411-00281-001), and 1003202746 (air compressor water pipe, OEM 1714511-00301-001) [2†L7-L8][3†L7-L9][0†L27-L28][1†L23-L26][0†L17-L18][4†L4-L8][11†L2-L4].
The WEICHAI WP12 Compressor Pipeline Group is designed to work with the WP12 engine’s twin-cylinder air compressor (OE No. 61800130043, 612630030047), which supplies compressed air for the vehicle’s braking system and pneumatic accessories. The engine features a robust twin-cylinder air compressor located at the front of the engine, driven directly by the gear train. The compressor gear mounting nut torque specification is 200-250 N·m during assembly [4†L15-L19][3†L30-L33][4†L18-L19].
Applications for the WEICHAI WP12 Compressor Pipeline Group include Shacman X3000/F3000/X5000, Sinotruk HOWO A7/T7H, Beiben trucks, JAC trucks, CAMC vehicles, Yutong and Kinglong buses, SDLG wheel loaders, XCMG equipment, marine WP12C engines (WP12C400, WP12C300, WP12C190-18), and stationary generator sets. The pipeline group is compatible with WP12 power outputs from 336 HP to 550 HP across Euro III, Euro IV, Euro V, China VI, and marine IMO II emission standards. The WP12 series engine has a displacement of 11.596 L, bore of 126 mm, and stroke of 155 mm, with four valves per cylinder and a turbocharged intercooled architecture [5†L10-L12][5†L14-L15].
| NO. | Part NO | Description |
|---|---|---|
| 1 | 612630030033 | Air Compressor Intake Pipe (WP12 Euro III, gear transmission) [9†L2-L4] |
| 2 | 612630110012 | Compressor Intake Funnel / Intake funnrl (WP12 Euro III) [10†L2-L4] |
| 3 | 612630030036 | Air Compressor Water Inlet Pipe (WP12, 270-480HP, 375-460N variants) [11†L2-L5] |
| 4 | 612630030037 | Twin-Cylinder Air Compressor Oil Pipe (WP12, gear transmission) [15†L2-L5] |
| 5 | 612630110366 / 1714411-00261-001 | Air Compressor Air Pipe (WP12/WP13, D22/22×L645, OEM reference) [12†L2-L4] |
| 6 | 1007713549 / 1714411-00440-001 | Air Compressor Air Pipe (WP12, OEM universal reference) [0†L27-L28] |
| 7 | 1000127028 / 1714411-00281-001 | Air Compressor Air Pipe (WP12/WP13, universal fitment) [12†L2-L4] |
| 8 | 1003202746 / 1714511-00301-001 | Air Compressor Water Pipe (WP12, OEM water supply line) [1†L23-L26] |
| 9 | 612630030047 / 61800130043 | Twin-Cylinder Air Compressor Assembly (Complete unit, 19.0kg) [14†L2-L5][3†L30-L33] |
| 10 | 612630110007 | Exhaust Tail Pipe (WP12, exhaust outlet pipe) [2†L4-L6] |
The table above lists common service parts for the WEICHAI WP12 Compressor Pipeline Group. When replacing any pipeline component, always verify the part number against your engine code and emission standard. The twin-cylinder air compressor (612630030047) weighs approximately 19.0 kg and is mounted at the front of the engine, driven by the gear train with a mounting nut torque specification of 200-250 N·m. All pipes are manufactured to OE specifications for corrosion resistance, dimensional accuracy, and temperature tolerance [4†L4-L8][13†L6-L7][4†L18-L19].
Our WEICHAI WP12 Compressor Pipeline Group components are precision-machined to original equipment specifications, ensuring exact fitment and proper sealing. The intake pipe (612630030033) and intake funnel (612630110012) are designed for the gear transmission system of WP12 Euro III engines, while the water pipe (1003202746) and air pipe (1000127028) are manufactured to OEM dimensional standards for WP12/WP13 applications [9†L2-L4][10†L2-L4][1†L23-L26][12†L2-L4].
All WEICHAI WP12 Compressor Pipeline Group components are manufactured from high-quality materials with anti-corrosive coatings, ensuring long-term durability in harsh engine environments. The water pipe (1003202746) is engineered to withstand continuous exposure to engine coolant and temperature fluctuations, while the air pipes (1007713549, 1000127028) are designed to resist cracking and fatigue under pressure [1†L23-L26][0†L27-L28][12†L2-L4].
The WEICHAI WP12 Compressor Pipeline Group is a complete system solution, including all necessary pipes for intake air, engine coolant, pressurized oil, and compressed air delivery. The group works in harmony with the twin-cylinder air compressor (612630030047), which has a gross weight of approximately 19.0 kg and dimensions of 38×32×17 cm, providing reliable compressed air for braking systems and pneumatic accessories [13†L6-L7][14†L2-L5].
No modifications required for WP12 engines in Shacman, Sinotruk, Beiben, JAC, CAMC, Yutong, Kinglong, SDLG, XCMG, marine, and generator applications. Available for Euro III, Euro IV/V, China VI, and marine engine variants. The compressor pipeline group is compatible with all WP12 engine power outputs from 270 HP to 550 HP, including the 375, 400, 480, 460N, and 336N variants [11†L4][15†L4].
Each WEICHAI WP12 Compressor Pipeline Group component undergoes rigorous quality control including dimensional inspection, pressure testing, and material verification. IATF 16949 certified quality with full traceability. The intake pipe (612630030033) and water pipe (612630030036) are manufactured to strict OE tolerances, ensuring reliable sealing and leak-free operation [9†L2-L4][11†L2-L5].
Worldwide shipping from regional warehouses. Free compressor pipeline installation torque charts (compressor gear nut: 200-250 N·m), gasket replacement procedures, and troubleshooting guides provided with each order. Volume discounts available for fleet customers and engine rebuilders [4†L18-L19].
Unlike aftermarket pipes that use inferior materials and lack proper dimensional accuracy, our genuine WEICHAI WP12 Compressor Pipeline Group is manufactured to original equipment specifications with documented quality control. The intake pipe (612630030033) and intake funnel (612630110012) are precision-cast and machined to ensure a perfect seal with the air compressor and air cleaner, preventing unfiltered air from entering the compressor and causing premature wear [9†L2-L4][10†L2-L4].
The WEICHAI WP12 Compressor Pipeline Group is designed to withstand the extreme conditions generated by the WP12 engine’s turbocharged common rail architecture. The water inlet pipe (612630030036) provides reliable coolant circulation to the air compressor, preventing overheating during prolonged high-load operation. The oil pipe (612630030037) supplies pressurized engine oil to the twin- cylinder compressor, ensuring proper lubrication of the compressor’s internal moving parts and extending service life [11†L2-L5][15†L2-L5].
Technical support includes compressor pipeline installation procedures: ensure engine is cool, disconnect all hoses from old pipes, remove old pipe assemblies, clean mounting surfaces, install new pipes with new gaskets and seals, tighten all fittings to specification (compressor gear nut: 200-250 N·m), reconnect all hoses, run engine to check for air, water, and oil leaks, and verify proper compressor operation [4†L18-L19]. Troubleshooting guides for symptoms like loss of brake air pressure (compressor intake restriction or compressed air leak), compressor overheating (coolant supply restriction), and oil leaks (failed oil pipe or gasket) are provided.
For fleets, sample testing is available. Order one WEICHAI WP12 Compressor Pipeline Group for trial; volume pricing applies. Many customers report over 500,000 km trouble-free compressor system operation after replacing cracked, corroded, or leaking original pipes with our genuine components. We provide cross-reference support for part number verification—please provide your engine serial number for accurate matching. We stock both complete pipeline sets for Euro III, Euro IV/V, China VI, and marine engine variants, as well as individual replacement pipes, gaskets, and seals.
Also monitor the vehicle’s air brake system performance. If the brake warning light illuminates or the air pressure gauge shows slow build-up, inspect the WEICHAI WP12 Compressor Pipeline Group for restrictions or leaks. A hissing sound from the engine compartment may indicate a compressed air leak at the air compressor discharge pipe. If the air dryer constantly cycles or discharges oil, inspect the compressor for oil carryover caused by failed piston rings or seals.
For severe-duty applications (mining, construction, heavy haul, marine), reduce compressor system inspection intervals to every 25,000 km (15,000 miles) or 250 operating hours. High ambient temperatures, dust, and vibration accelerate pipe cracking, seal hardening, and fastener loosening. Marine applications require additional corrosion checks—saltwater environments can corrode metal pipes and fittings. Use stainless steel or corrosion-resistant fasteners in marine applications where available.
When installing a new WEICHAI WP12 Compressor Pipeline Group component, ensure that all mating surfaces are perfectly clean and free of old gasket material, corrosion, and debris. Use a torque wrench to achieve specified torque values for all fasteners. For the twin-cylinder air compressor gear mounting nut, torque to 200-250 N·m [4†L18-L19]. After installation, start the engine and check for air, water, and oil leaks at all connections. Listen for hissing sounds indicating air leaks. Spray soapy water on pipe connections—bubbles indicate leaks requiring immediate correction.
Maintain a logbook of all compressor system maintenance: dates of pipeline inspections, leak detection findings, gasket replacement intervals, compressor gear nut torque verification readings, and any abnormal findings. For fleet operators, tracking the air pressure build-up time from 0 to 100 psi is a powerful predictive maintenance tool—a gradual increase in build-up time often indicates developing intake restrictions or compressed air leaks in the WEICHAI WP12 Compressor Pipeline Group, providing ample warning before complete system failure occurs.
In summary, the WEICHAI WP12 Compressor Pipeline Group features precision-machined OE-spec components (intake pipe 612630030033, intake funnel 612630110012, water pipe 612630030036, oil pipe 612630030037, air pipes 612630110366, 1007713549, 1000127028, water pipe 1003202746), corrosion-resistant materials, complete system integration with the twin-cylinder air compressor (612630030047), and direct fitment for all WP12 applications. Whether you are rebuilding a Shacman X3000, Sinotruk HOWO, Beiben truck, Yutong bus, SDLG wheel loader, marine vessel, or generator set, choosing a genuine compressor pipeline group directly impacts brake system reliability, compressor longevity, and overall vehicle safety.
For workshops performing in-frame overhauls, we recommend ordering the WEICHAI WP12 Compressor Pipeline Group as a complete kit including the intake pipe (612630030033), intake funnel (612630110012), water pipe (612630030036), oil pipe (612630030037), compressed air pipes (612630110366, 1007713549, 1000127028, 1003202746), the twin-cylinder air compressor (612630030047), all gaskets and seals, and the compressor gear mounting nut. This approach eliminates hidden failures and gives your customer a worry-free warranty period. All pipes are pre-inspected for dimensional accuracy, sealing integrity, and material quality before shipment.
Our inventory includes both standard compressor pipeline sets for highway truck applications and heavy-duty variants for mining, construction, and marine applications. The standard WEICHAI WP12 Compressor Pipeline Group provides excellent service life for long-haul trucking, while heavy-duty variants feature enhanced corrosion-resistant coatings for severe environments. We provide cross-reference support for part number verification—please provide your engine serial number for accurate matching. We stock complete pipeline sets for Euro III, Euro IV/V, China VI, and marine engine variants, as well as individual replacement pipes, gaskets, and seals.
We provide after-sales documentation including pipeline dimensional inspection reports, material certificates, compressor gear nut torque specifications (200-250 N·m), installation procedures, and diagnostic trouble code (DTC) guides for compressor-related faults upon request. Every WEICHAI WP12 Compressor Pipeline Group component is packaged in protective foam-lined boxes to prevent damage during shipping. Bulk orders receive custom palletizing and export documentation assistance. Express shipping available for urgent repairs—most orders dispatched within 24 hours.
All specifications based on original WEICHAI WP12 engine data. Cross-check part numbers with engine serial number and emission standard. The WEICHAI WP12 Compressor Pipeline Group includes OEM references 612630030033 (intake pipe), 612630110012 (intake funnel), 612630030036 (water pipe), 612630030037 (oil pipe), 612630110366/1714411-00261-001 (air pipe), 1007713549/1714411-00440-001 (air pipe), 1000127028/1714411-00281-001 (air pipe), 1003202746/1714511-00301-001 (water pipe), and 612630030047/61800130043 (air compressor). Always torque compressor gear mounting nut to 200-250 N·m, use new gaskets at every service, and verify no air, water, or oil leaks after installation [4†L18-L19].
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