- ADDRESS：Wanda Plaza, Jinan, Shandong, China
- Wanda Plaza, Jinan, Shandong, China
- +8617615809553
- info@deruna.com
The WEICHAI WP12 Connecting Rod and Piston Assembly combines the piston, connecting rod, pin, rings, and retainers into one pre-balanced unit. The piston is cast from high-silicon aluminum alloy with anodized ring grooves to resist micro-welding. The connecting rod is drop-forged from 42CrMo4 steel, heat-treated to achieve tensile strength above 1000 MPa. This WEICHAI WP12 Connecting Rod and Piston Assembly endures gas loads exceeding 25 tons per cylinder at peak torque. Precision machining of the small and big end bores ensures proper oil film formation and silent operation under full load.
Each WEICHAI WP12 Connecting Rod and Piston Assembly is weight-matched within 5 grams across a set of six cylinders, drastically reducing engine vibration. The piston features an optimized combustion bowl that matches WP12 common-rail injector spray patterns, promoting complete fuel burn and lower soot emissions. Three piston rings are included: a chromium-ceramic coated top ring, a second tapered ring, and a three-piece oil control ring. All rings in the WEICHAI WP12 Connecting Rod and Piston Assembly are pre-gapped to service specifications, eliminating the need for filing during installation.
The connecting rod uses a fractured cap design, ensuring perfect alignment without locating dowels. This technology resists cap movement under high RPM, a common failure on conventionally machined rods. The big end bore includes C70 steel-backed bearing shells with a tin-aluminum overlay for excellent embedability. For severe duty cycles, our WEICHAI WP12 Connecting Rod and Piston Assembly offers an upgraded wrist pin with diamond-like carbon coating, reducing friction by 20%. Always verify that your WEICHAI WP12 Connecting Rod and Piston Assembly matches the engine’s compression ratio – we supply versions for Euro II, III, and IV emissions.
Applications include Shacman F3000/X3000, Sinotruk HOWO A7, Dongfeng KL, and wheel loaders (SDLG, XCMG). The WEICHAI WP12 Connecting Rod and Piston Assembly is also a popular choice for repowering older engines because it reduces oil consumption by up to 30%. When ordering, specify standard compression height (72.5mm) or low-compression version (71.8mm). Every WEICHAI WP12 Connecting Rod and Piston Assembly comes with a full one-year warranty against material defects. We also sell individual components if only pistons or rods are needed.
| NO. | Part NO. | Description |
|---|---|---|
| 1 | 612630010001 | Piston (Al-Si alloy, anodized grooves) |
| 2 | 612630010015 | Connecting Rod (42CrMo4, fractured cap) |
| 3 | 612630010022 | Piston Ring Set (3 rings, chrome-ceramic top) |
| 4 | 612630010038 | Piston Pin (floating type, carburized) |
| 5 | 612630010046 | Retaining Ring Set (spiral spring steel) |
| 6 | 612630010054 | Connecting Rod Bearing Set (std, upper+lower) |
| 7 | 612630010062 | Piston Pin Bushing (bronze, pre-fitted) |
| 8 | 612630010079 | Complete Kit (6 cylinders, with bearings) |
Our WEICHAI WP12 Connecting Rod and Piston Assembly is sourced directly from the original equipment supply chain, not reverse-engineered aftermarket copies. Each assembly includes a certificate of conformance and dimensional inspection report. The piston compression height, ring groove widths, and wrist pin bore diameter adhere strictly to Weichai master prints. Lower-cost copies use inferior aluminum alloys that soften at high temperatures, leading to skirt collapse. Our WEICHAI WP12 Connecting Rod and Piston Assembly passes a 300-hour dynamometer test before release.
We offer the WEICHAI WP12 Connecting Rod and Piston Assembly in three oversize options: standard, 0.25mm, and 0.50mm for rebored cylinders. Connecting rods are available in standard and 0.25mm undersize for worn crankshaft journals. Our rod bolts are single-use and pre-coated with micro-encapsulated thread locker, supplied with torque-angle specs (40 N·m + 90°). Choosing our WEICHAI WP12 Connecting Rod and Piston Assembly means you never need to search for compatible fasteners or bearings – everything is in the box.
Inventory and shipping: we maintain over 1,000 complete WEICHAI WP12 Connecting Rod and Piston Assembly units in regional warehouses across North America, Europe, and Asia. Urgent repairs get dispatched within 24 hours via air freight. Bulk fleet orders receive volume discounts and an extended 18-month warranty. Our technical team provides free guidance on ring gap orientation (staggered 120°) and proper small-end heating (max 120°C). No other supplier offers this level of support for the WEICHAI WP12 Connecting Rod and Piston Assembly.
Real-world results: customers report a 40% reduction in oil consumption and noticeable drop in blow-by pressure after installing our assembly. A fleet of 20 dump trucks achieved an extra 8,000 hours before overhaul – double the previous interval. This reliability comes from strict adherence to original metallurgy and heat treatment cycles. When you invest in our WEICHAI WP12 Connecting Rod and Piston Assembly, you lower total cost of ownership and prevent roadside breakdowns.
Regular oil analysis is the best preventive measure for the WEICHAI WP12 Connecting Rod and Piston Assembly. Elevated iron, aluminum, or copper in oil indicates ring wear, piston scuffing, or bearing fatigue. Intervene if wear metals exceed 150 ppm. Monitor oil consumption – an increase from 0.05% to 0.2% of fuel consumption signals ring sticking. Perform crankcase blow-by measurement every 500 hours; blow-by above 100 L/min suggests worn rings. Address these issues early to protect your WEICHAI WP12 Connecting Rod and Piston Assembly from catastrophic failure.
When installing a new WEICHAI WP12 Connecting Rod and Piston Assembly, always use assembly lube on rod bearings and piston pins. Replace connecting rod bolts with new ones – never reuse old bolts. Tighten in two stages: first to 40 N·m, then 90 degrees using a torque angle gauge. After the first 250 hours, re-torque the cylinder head but do not re-torque rod bolts. Verify piston cooling jets (oil squirters) are not clogged; blocked jets cause piston overheating and skirt collapse within 100 hours.
During oil changes (every 400 hours for severe duty), inspect the magnetic drain plug. Fine grey sludge is normal, but bearing material chunks indicate rod bearing failure. If debris is found, remove the oil pan and inspect rod big end bearings. Listen for a low-pitched knock that increases with load – a classic sign of worn bearings or stretched rod bolts. Do not operate the engine if such a knock is audible. Always use API CK-4 or CJ-4 oil with TBN at least 10 for your WEICHAI WP12 Connecting Rod and Piston Assembly.
For long-term storage, rotate the engine manually every 30 days to prevent ring sticking. Before start-up after storage, pour oil into each cylinder and crank with starter (fuel off) to pre-lubricate rings. When rebuilding with a new WEICHAI WP12 Connecting Rod and Piston Assembly, follow a break-in procedure: run at variable loads below 70% power for 10 hours, avoid extended idling, and change oil and filter after the first 50 hours. This allows rings to seat properly and extends assembly life beyond 20,000 hours.
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If you have any questions about our products, services, or anything related to what we offer, please don’t hesitate to leave us a message—our dedicated team is always ready to provide prompt and helpful responses to address your concerns. What’s more, when you become our valued customer, we’re delighted to offer you complimentary catalog services, giving you access to detailed, up-to-date information on our full range of products, specifications, and offerings to help you make informed decisions.
We are a first-class heavy duty vehicles and spare parts supplier in China. which covers from engine, gearbox, cab, axle assemblies to main assembly accessories, electrical parts and other chassis parts like brake, clutch and steering parts.
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