Model: WP12 / WD618
Part Number: 1006466580
Brands: Weichai Power
Engine Model: WP12, WD12, WD618, WP12.430, WP12.460
Engine Type: Diesel
Scope of application: heavy trucks, mining dump trucks, construction machinery, marine and generator engines
A 12-litre engine produces high torque from low speed, which means heavy bending loads along the shaft and strong torsional pulses from six firing cylinders in sequence. The crankshaft must carry all of it while keeping every journal round and aligned. Part 1006466580 is one of the shafts used in the WP12 and WD618 family, forged from alloy steel, induction hardened and nitrided before final grinding.
The shaft carries the main and rod bearings, drives the oil pump and camshaft through the front gear train and delivers torque to the flywheel. Once a journal loses roundness the bearing cannot maintain an oil film, pressure drops and failure follows quickly, usually with little warning beyond a knock.
The shaft fits WP12 and WD12 road engines and WD618 industrial and marine variants, including heavy tractors, mining dump trucks, large loaders and generator sets. Confirm the engine plate and the old crankshaft number before ordering. Front pulley and flywheel flange details differ between variants even when the main dimensions look identical, and a shaft from the wrong variant will not accept your existing damper or flywheel.
Every shaft is measured after grinding, and the checks are the ones that decide whether it survives service. Journal diameter and ovality are measured at several points along each journal. Fillet radii are verified because fatigue cracks begin at sharp fillets. Run-out is checked on centres, and the thrust face is measured for flatness and surface finish, which together control end float and oil loss at the rear seal.
Shafts ship in a braced crate with protective sleeves on the journals. If you need an undersize for a repair, tell us before dispatch, because regrinding after delivery is rarely practical for export buyers.
Bearing noise and oil pressure are the two indicators that matter. A knock under load that fades at idle is the classic warning, and by the time it becomes loud the journal is usually already damaged and the bearing is close to spinning.
Match the part number, the journal size and the bearing shells you intend to fit. Mixing a reground shaft with standard shells guarantees failure, and the mistake is easy to make when two shafts look similar. Give us the bearing part numbers with your enquiry and we will confirm the journal size before the order ships.
WP12 and WD618 crankshafts are closely related but not identical across production batches. The reliable identifiers are the part number stamped on the shaft and the engine plate. Photographs of both shaft ends resolve the question faster than any catalogue lookup, because the damper fixing and flange pattern are visible there.
A six-cylinder crankshaft twists and untwists several times per revolution. The damper absorbs that oscillation, and when its rubber perishes the oscillation reaches the shaft directly and fatigue cracks begin at the fillets. Many failures blamed on lubrication are actually damper failures that went unnoticed for thousands of hours. Inspect the damper whenever the shaft is out, and replace it with a new shaft as a matter of course.
Crankshafts are dense and awkward, so they are bolted into braced timber crates with journals sleeved and lifting points marked. Freight is charged on weight and volume, so tell us whether the shaft travels with a cylinder block so we can plan the load and reduce the total cost.
Lubrication and vibration control decide crankshaft life. Use the specified oil, change it at the severe-duty interval, keep the oil cooler clean and never run with a leaking injector that thins the oil. After a hydraulic lock or a broken damper, check straightness before the shaft goes back into service.
Yes, journals and fillets are nitrided for wear and fatigue resistance.
Only if enough hardened layer remains. Most export buyers prefer a new standard shaft.
Strongly recommended. A tired damper is a common cause of crankshaft failure.
Mount it on centres and measure run-out at the centre journal.
Explore the Weichai crankshaft category, and complete the bottom end with the WP12 cylinder block 612630010679 or the WP12 oil pump 612600081127.
Weichai WP12 Crankshaft (1006466580). Everything the engine produces passes through this shaft. Journals, fillets and the damper interface all decide how long the bearings survive, and all three are measurable before assembly.
Photograph both ends of the old shaft with a ruler alongside. Damper fixing, flywheel flange and pilot bore differ between production periods even when the journals are identical.
Numbers beginning 1006 belong to the numeric series used on WP12 and WD618 later production. Cross-referencing against the old part number is recommended. On this engine, confirm the WP12 application against the engine plate before ordering.
Fit a new torsional damper with the shaft. A perished damper sends the same oscillation into the new crankshaft and cracks it at the fillets.
Ordering note. If the old number has been superseded, the replacement number is quoted alongside the original so the purchasing file stays consistent.
Related reading: Crankshaft Inspection: Journals, Fillets and Regrinding
| We Are 30 Years Diesel Engine Parts Supplier | |
| Brand | EPID |
| Warranty | 12 Months |
| Condition | 100%New |
| More Models | Weichai: WP12, WD12, WD618, WP12.430, WP12.460, and other Weichai series. |
| Shipping | By sea / air / express (DHL, FEDEX, TNT, UPS, EMS) |
| Packing | Standard exporting packing or as required |
| Payment Term | L/C, T/T, Western Union, Trade Assurance |
| Delivery Time | 3-7 days (depend on order) |
| Selling Point | 1. On-time Delivery 2. Genuine Quality Assurance 3. Professional Supplier |
Every shaft is measured after grinding, and the checks are the ones that decide whether it survives service. Journal diameter and ovality are measured at several points along each journal. Fillet radii are verified because fatigue cracks begin at sharp fillets. Run-out is checked on centres, and the thrust face is measured for flatness and surface finish, which together control end float and oil loss at the rear seal.
Shafts ship in a braced crate with protective sleeves on the journals. If you need an undersize for a repair, tell us before dispatch, because regrinding after delivery is rarely practical for export buyers.
Bearing noise and oil pressure are the two indicators that matter. A knock under load that fades at idle is the classic warning, and by the time it becomes loud the journal is usually already damaged and the bearing is close to spinning.
Match the part number, the journal size and the bearing shells you intend to fit. Mixing a reground shaft with standard shells guarantees failure, and the mistake is easy to make when two shafts look similar. Give us the bearing part numbers with your enquiry and we will confirm the journal size before the order ships.
WP12 and WD618 crankshafts are closely related but not identical across production batches. The reliable identifiers are the part number stamped on the shaft and the engine plate. Photographs of both shaft ends resolve the question faster than any catalogue lookup, because the damper fixing and flange pattern are visible there.
A six-cylinder crankshaft twists and untwists several times per revolution. The damper absorbs that oscillation, and when its rubber perishes the oscillation reaches the shaft directly and fatigue cracks begin at the fillets. Many failures blamed on lubrication are actually damper failures that went unnoticed for thousands of hours. Inspect the damper whenever the shaft is out, and replace it with a new shaft as a matter of course.
Crankshafts are dense and awkward, so they are bolted into braced timber crates with journals sleeved and lifting points marked. Freight is charged on weight and volume, so tell us whether the shaft travels with a cylinder block so we can plan the load and reduce the total cost.
Lubrication and vibration control decide crankshaft life. Use the specified oil, change it at the severe-duty interval, keep the oil cooler clean and never run with a leaking injector that thins the oil. After a hydraulic lock or a broken damper, check straightness before the shaft goes back into service.
Explore the Weichai crankshaft category, and complete the bottom end with the WP12 cylinder block 612630010679 or the WP12 oil pump 612600081127.
Yes, journals and fillets are nitrided for wear and fatigue resistance.
Only if enough hardened layer remains. Most export buyers prefer a new standard shaft.
Strongly recommended. A tired damper is a common cause of crankshaft failure.
Mount it on centres and measure run-out at the centre journal.
EPID supplies diesel engine parts for Weichai, Baudouin, Yuchai, Caterpillar, Sinotruk, FAW Xichai and Cummins engines. Every order is checked against the original part number before packing, and our team can identify a part from a photo of the engine plate. Ask for a quotation with your model and quantity and we will reply within one working day.
