Model: WD615 / WP10
Part Number: 612600020751
Brands: Weichai Power
Engine Model: WD615, WD615E2, WD10, WP10, WP10G
Engine Type: Diesel
Scope of application: heavy trucks, buses, construction machinery, generator sets
The WD615 and WP10 are six-cylinder engines that spend most of their life at high load, so the crankshaft sees heavy bending and strong torsional pulses. Part 612600020751 is one of the shafts used in this family, forged from alloy steel, induction hardened and nitrided before final grinding to standard journal size.
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 hold an oil film, pressure falls and failure follows quickly.
The shaft fits WD615 and WP10 engines in heavy trucks, buses, loaders, excavators 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.
Every shaft is measured after grinding. Journal diameter and ovality are checked at several points. 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 finish, which control end float and oil loss at the rear seal.
Shafts ship in a braced crate with journals sleeved. If you need an undersize for a repair, tell us before dispatch.
A knock is the last warning before a bearing spins, and by then the journal is usually already damaged.
Match the part number, the journal size and the shells you intend to fit. Mixing a reground shaft with standard shells guarantees failure. Give us the bearing part numbers and we will confirm the journal size before shipping.
WD615 and WP10 shafts are closely related but not identical across production batches. The reliable identifiers are the number stamped on the shaft and the engine plate. Photographs of both shaft ends resolve the question faster than any catalogue lookup.
A six-cylinder crankshaft twists and untwists several times per revolution. The damper absorbs that oscillation; when its rubber perishes, the oscillation reaches the shaft and cracks begin at the fillets. Many failures blamed on lubrication are actually damper failures that went unnoticed.
Shafts 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 block so we can plan the load.
Lubrication and vibration control decide crankshaft life. Use the specified oil, change it at the severe-duty interval, keep the cooler clean and never run with a leaking injector that dilutes the oil. After a hydraulic lock or a broken damper, check straightness before reuse.
A scored journal can sometimes be polished, and a shaft with light wear can be ground to an undersize where shells are available in that grade. Each grinding pass removes hardened layer, so the shaft that survives two grinds has very little fatigue margin left. For a heavy truck working in mining or long haul, that margin matters more than the saving on a new part.
Reject a shaft if a journal shows heat discoloration, if a fillet is sharp after grinding, or if run-out exceeds specification after straightening. Straightening a bent crankshaft is possible but rarely lasts: the residual stress pulls it back out of line once the engine reaches operating temperature.
Yes, journals and fillets are nitrided.
Only if enough hardened layer remains. Most buyers prefer a new standard shaft.
Strongly recommended with a new shaft.
Mount on centres and measure run-out at the centre journal.
Explore the Weichai crankshaft category, and complete the bottom end with the WD615 cylinder block 1002099589 or the WD615 pump range.
Weichai WD615 Crankshaft (612600020751). The crankshaft converts combustion pressure into torque and carries the entire load of the rotating assembly. Its journals set the oil film that keeps the bearings alive.
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 6126 belong to the generation shared with the WD618 and early WP12 engines. Parts in this block were revised several times, so the casting or housing is the reliable identifier rather than the number alone. On this engine, confirm the WD615 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. Inspection reports can be provided for castings and crankshafts on request, covering the measurements taken before packing.
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: WD615, WD615E2, WD10, WP10, WP10G, 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. Journal diameter and ovality are checked at several points. 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 finish, which control end float and oil loss at the rear seal.
Shafts ship in a braced crate with journals sleeved. If you need an undersize for a repair, tell us before dispatch.
A knock is the last warning before a bearing spins, and by then the journal is usually already damaged.
Match the part number, the journal size and the shells you intend to fit. Mixing a reground shaft with standard shells guarantees failure. Give us the bearing part numbers and we will confirm the journal size before shipping.
WD615 and WP10 shafts are closely related but not identical across production batches. The reliable identifiers are the number stamped on the shaft and the engine plate. Photographs of both shaft ends resolve the question faster than any catalogue lookup.
A six-cylinder crankshaft twists and untwists several times per revolution. The damper absorbs that oscillation; when its rubber perishes, the oscillation reaches the shaft and cracks begin at the fillets. Many failures blamed on lubrication are actually damper failures that went unnoticed.
Shafts 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 block so we can plan the load.
Lubrication and vibration control decide crankshaft life. Use the specified oil, change it at the severe-duty interval, keep the cooler clean and never run with a leaking injector that dilutes the oil. After a hydraulic lock or a broken damper, check straightness before reuse.
A scored journal can sometimes be polished, and a shaft with light wear can be ground to an undersize where shells are available in that grade. Each grinding pass removes hardened layer, so the shaft that survives two grinds has very little fatigue margin left. For a heavy truck working in mining or long haul, that margin matters more than the saving on a new part.
Reject a shaft if a journal shows heat discoloration, if a fillet is sharp after grinding, or if run-out exceeds specification after straightening. Straightening a bent crankshaft is possible but rarely lasts: the residual stress pulls it back out of line once the engine reaches operating temperature.
Explore the Weichai crankshaft category, and complete the bottom end with the WD615 cylinder block 1002099589 or the WD615 pump range.
Yes, journals and fillets are nitrided.
Only if enough hardened layer remains. Most buyers prefer a new standard shaft.
Strongly recommended with a new shaft.
Mount 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.
