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- Wanda Plaza, Jinan, Shandong, China
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The WEICHAI WP12 Oil Tilling Tube Group is a dedicated oil filling channel assembly engineered for the WP12 diesel engine platform. This complete assembly ensures clean, spill-free oil delivery from the filler cap to the oil sump, preventing contamination and overfill. Proper lubrication access is critical for engine health, and the WEICHAI WP12 Oil Tilling Tube Group provides fleet operators and technicians with a reliable, sealed route for routine oil top-ups and complete oil changes. For genuine replacement parts and comprehensive engine service components, always source from verified WEICHAI Engine Parts to guarantee OEM fitment, consistent quality, and long-term reliability.
The WEICHAI WP12 Oil Tilling Tube Group is a dedicated oil filling channel assembly that routes engine oil from the filler cap on the valve cover down to the oil sump. This complete assembly includes the filler tube, sealing gaskets or O-rings, mounting brackets, and the filler cap with integrated breather or sealing mechanism. Located on top of the engine for easy access, the oil tilling tube provides a clean, spill-free route for adding oil during routine maintenance, preventing debris from entering the crankcase and ensuring proper oil level management.
The filler tube is manufactured from corrosion-resistant steel tubing with a protective coating, offering excellent durability across a wide temperature range (-35°C to 120°C). The tube is precisely bent to route around other engine components such as the valve cover, intake manifold, and wiring harnesses, ensuring unobstructed access for oil filling. The tube’s inner diameter is optimized to allow rapid oil flow while preventing foaming or air entrapment. For the WP12 engine, the WEICHAI WP12 Oil Tilling Tube Group is calibrated to direct oil precisely into the oil pan’s fill zone, avoiding splashing onto rotating components.
The WEICHAI WP12 Oil Tilling Tube Group is designed for the 11.596-liter inline-six WP12 engine used in heavy trucks (HOWO, SHACMAN, FOTON), construction machinery (loaders, excavators), marine propulsion, and stationary generator sets. The assembly is compatible with all WP12 variants from Euro III through Euro V emission standards, as well as China VI engines. The filler cap is typically molded from glass-filled nylon with a bright yellow or orange color for high visibility, featuring finger grips for easy removal even when wearing work gloves. The cap includes a rubber seal that prevents oil mist from escaping the crankcase and keeps contaminants out.
In addition to the basic tube and cap, the complete WEICHAI WP12 Oil Tilling Tube Group includes high-temperature O-ring seals at the tube-to-valve cover interface and at the cap-to-tube connection. These seals prevent oil seepage and crankcase pressure loss. The tube is typically secured to the engine using one or two mounting brackets with rubber vibration isolators, preventing metal-to-metal contact that could wear through the tube over time. Replacement oil tilling tube groups are available as complete assemblies or as individual components (tube only, cap only, or seal only). Genuine assemblies include a traceable part number and batch code for quality assurance.
For marine applications, the WEICHAI WP12 Oil Tilling Tube Group includes an extended or angled filler tube to accommodate the engine’s installation position within the vessel hull. Marine filler caps often feature a secondary locking mechanism to prevent accidental opening due to vibration. In stationary generator applications, the oil tilling tube group is identical to the truck version, as the engine operates on a level surface. For construction equipment that operates in dusty environments, filler caps with integrated breather filters are available to prevent dust ingress during oil filling.
Every genuine WEICHAI WP12 Oil Tilling Tube Group undergoes visual inspection for dimensional accuracy, seal integrity testing, and cap latch function verification. Counterfeit oil filler tube assemblies often use inferior materials such as uncoated mild steel that rusts, poorly formed bends that obstruct oil flow, and caps that become brittle and crack after exposure to under-hood heat. A cracked cap can separate during use, allowing debris to fall directly into the oil pan. Always source from authorized distributors to ensure safety, cleanliness, and proper engine protection.
| NO. | Part NO | Description |
|---|---|---|
| 1 | 612600010512 | Oil Filler Tube Assembly (Complete with Cap) |
| 2 | 612600010533 | Oil Filler Tube Cap with Integrated O-Ring |
| 3 | 612600010557 | Oil Filler Tube Only (Bare Tube) |
| 4 | 612600010564 | Oil Filler Tube Mounting Bracket (Front) |
| 5 | 612600010571 | Oil Filler Tube Mounting Bracket (Rear) |
| 6 | 612600012208 | Oil Filler Tube O-Ring Seal (High-Temperature, Set of 5) |
| 7 | 612600012209 | Oil Filler Cap Seal Gasket (Rubber) |
| 8 | 612600010588 | Oil Filler Tube Rubber Vibration Isolator |
| 9 | 612630061000 | Oil Filler Tube Rubber Connector Hose |
| 10 | 612600150382 | Oil Pan Assembly with Filler Tube Port (Complete) |
Our WEICHAI WP12 Oil Tilling Tube Group is manufactured from corrosion-resistant steel tubing with zinc-phosphate coating. The filler cap is molded from glass-filled nylon that resists cracking at under-hood temperatures up to 120°C, ensuring long service life.
CNC tube bending ensures exact routing around valve cover, intake manifold, and wiring harnesses. Correct bend angles prevent kinking or restriction, allowing rapid oil flow during filling without splashing or air entrapment.
We offer the WEICHAI WP12 Oil Tilling Tube Group as a complete kit including filler tube, cap, O-ring seals, mounting brackets, and vibration isolators. Individual components are also available for partial replacements when only one part requires renewal.
Pre-bent tubes and correctly positioned mounting brackets ensure direct bolt-on installation for WP12 engines in HOWO, SHACMAN, FOTON, and other Chinese heavy trucks. No modifications or cutting required.
We stock marine filler tubes with extended or angled routing for WP12 marine engines. Generator versions with standard calibration are also available. Specify your application when ordering to receive the correct configuration.
We maintain substantial stock of WEICHAI WP12 Oil Tilling Tube Group components in warehouses across Asia, Europe, and the Americas. Express shipping options minimize downtime for fleet operators.
Unlike generic aftermarket oil filler tubes that use uncoated mild steel prone to rusting and inaccurate bends, our WEICHAI WP12 Oil Tilling Tube Group is manufactured to original equipment specifications. The filler tube features a durable zinc-phosphate or black oxide finish that resists corrosion from engine bay moisture, road salt, and oil spills. The filler cap is ultrasonically welded and features a positive-locking mechanism that prevents accidental opening due to engine vibration. This attention to detail ensures that your WP12 engine receives clean oil every time you fill.
Furthermore, our filler tubes include high-quality FKM (Viton) O-rings that maintain sealing flexibility across temperature extremes. Many low-cost oil filler tubes use nitrile rubber O-rings that harden and crack within 100,000 km, allowing oil mist to escape and causing gradual oil loss. Our O-rings are rated for continuous service at 120°C and intermittent exposure to 150°C, ensuring the seal remains effective for the life of the engine.
Technical documentation included with the WEICHAI WP12 Oil Tilling Tube Group provides correct installation torque specifications (10-15 Nm for mounting bracket bolts), O-ring lubrication recommendations (light oil film before assembly), and a troubleshooting guide for common issues such as oil seepage around the cap (replace seal) or difficulty inserting the filler cap (clean threads and lubricate lightly).
For large fleet customers, we offer sample evaluation: order one WEICHAI WP12 Oil Tilling Tube Group for trial installation. After validation, volume pricing applies. Many return customers report that our oil filler tube assemblies last the full life of the engine (over 1,000,000 km) without cap cracking or tube corrosion, compared to low-cost alternatives that often fail within 200,000 km.
Beyond the checklist above, pay attention to any oil residue around the filler cap after operation. A small amount of oil mist is normal, but visible oil seepage indicates a worn cap seal or loose cap. Replace the cap seal immediately to prevent further oil loss. For engines operating in extremely dusty environments (mines, quarries, agricultural applications), consider installing a filler cap with an integrated breather filter to prevent dust ingress during oil filling.
When performing an oil change, always remove the filler cap before draining the oil to allow the crankcase to vent, promoting faster draining. After refilling with the specified oil quantity (typically 28-32 liters for a dry WP12 engine, depending on oil pan configuration), replace the filler cap and ensure it is fully seated. Run the engine for 30 seconds, stop, wait 5 minutes, then check the oil level. Add small amounts of oil as needed until the level reaches the high mark on the dipstick.
If the filler cap becomes difficult to remove, do not use excessive force. Apply penetrating oil around the threads and let it sit for several minutes. If the cap is seized due to overtightening or corrosion, replace both the cap and the filler tube to ensure a proper seal. For marine applications, more frequent cap and seal replacement (every 100,000 km or 2,000 hours) is recommended due to salt air exposure accelerating rubber degradation.
Finally, maintain a service log for the WEICHAI WP12 Oil Tilling Tube Group recording any replacement events, observed wear, and seal condition checks. This data helps predict when components are approaching end of life. For fleet operators, standardized replacement of filler cap O-rings every 200,000 km and complete filler tube assemblies every 500,000 km eliminates oil mist escape and debris ingress issues.
In summary, the WEICHAI WP12 Oil Tilling Tube Group is an often-overlooked but essential component for any WP12 engine maintenance program. Its simple design belies its importance — a cracked filler cap or corroded tube can allow debris to enter the oil pan, leading to bearing failure and expensive repairs. Whether you are performing routine oil changes on a HOWO dump truck, maintaining a fleet of SHACMAN tractors, or servicing a WP12 marine propulsion engine, using a genuine oil filler tube assembly ensures that clean oil reaches the sump every time.
For workshops performing engine rebuilds, we recommend ordering the WEICHAI WP12 Oil Tilling Tube Group together with a new oil pan gasket and oil filter. The filler tube assembly is the last component installed before filling with oil, and a new assembly ensures that the rebuilt engine receives clean, uncontaminated oil from day one. We provide installation guides with torque specifications and orientation marks for all WP12 engine variants.
Our inventory includes both standard-length filler tubes for on-highway trucks and extended-length or angled versions for marine and generator installations. We also offer filler caps with integrated breather filters for dusty environments. For urgent repairs, we stock pre-assembled filler tube groups that include the tube, cap, O-rings, and mounting brackets in a single box, ready for installation.
We also provide after-sales documentation including material certificates and dimensional inspection reports upon request. Every WEICHAI WP12 Oil Tilling Tube Group is packaged in a foam-lined box to prevent tube bending during transit. Bulk orders receive custom export crating and documentation.
All specifications are based on original WEICHAI WP12 engine data. Actual product dimensions may vary by sub-model (Euro III, Euro V, marine, construction, etc.). Always verify part numbers against your engine’s serial number plate before ordering.
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