Model: WP7 / WP8
Part Number: 1002128299
Brands: Weichai Power
Engine Model: WP7, WP7H, WP8, WP8H
Engine Type: Diesel
Scope of application: medium and heavy trucks, buses, construction machinery, generator sets
The WP7 and WP8 engines use a single camshaft in the block, driven by gears from the crankshaft, with lobes that open the intake and exhaust valves at fixed points in the cycle. Part 1002128299 is the camshaft for this family, used in medium trucks, buses and construction equipment.
Because these engines often run in urban duty with frequent starts and idling, the valve train sees many low-speed cycles. That duty profile is gentle on the crank but hard on the camshaft and lifters, where oil splash is weakest at idle.
The camshaft fits WP7, WP7H, WP8 and WP8H engines. Typical installations are medium trucks, city and intercity buses, wheel loaders and small generator sets. Confirm the engine plate and the old camshaft number: the pump drive gear and the rear end shape differ between some production batches.
Shafts ship oiled and sleeved in a rigid tube. Bearings and a thrust plate can be fitted before delivery if requested.
Measure lift before replacing anything else. A worn lobe cannot be corrected by adjusting clearance.
Long idling during break-in is the main cause of lobe scuffing on a new shaft, because oil splash to the lobes is minimal at low speed.
Match the part number, engine rating and pump type. A shaft from a different rating can physically fit but changes valve timing and emissions. For fleets, keep one shaft and one lifter set in stock; failure stops a vehicle for days otherwise.
Oil quality and valve clearance decide camshaft life. Use the specified grade, change it at the severe-duty interval and check clearance at every major service. Keep the breather clean so oil mist does not carry abrasive dust into the valve chamber, and replace worn timing gears before they hammer the lobes.
A camshaft and its lifters wear as a pair. The lobe and the lifter face develop a matched contact pattern, and putting a used lifter onto a new lobe destroys the lobe within hours of running. Every camshaft we supply should be installed with a complete new lifter set of the same specification.
Check the lifter bores in the block as well. A lifter that cannot rotate freely in its bore will scuff its lobe, and a bore that is too tight is often the real reason an engine has eaten two camshafts. Measure with a bore gauge and compare against specification before assembly.
Camshafts are long, slender parts that bend easily in transit. They ship in rigid tubes with the journals protected, and the tube is braced inside the carton so it cannot flex. If the shaft travels in a container with heavy parts, tell us so we can place it where nothing can rest on it.
The camshaft is only one link in the gear train. A worn crank gear or a slack idler changes valve timing and hammers the lobes, which is why a rebuilt engine should have the whole train inspected. Measure gear backlash and look for a polished or stepped tooth pattern, which indicates wear rather than a machining mark. Replacing the camshaft while leaving worn gears in place is a reliable way to lose the new part.
Yes. Used lifters have a matched wear pattern and scuff a new lobe quickly.
Always verify pump timing after fitting a camshaft.
The shaft comes with its drive gear fitted. A bare shaft is available on request.
Measure valve lift at the rocker with a dial gauge; if lift is low, the lobe is worn.
See the Weichai camshaft category, and pair this shaft with the WP7 and WP8 water pump 1001996660 or the WP13 camshaft 1000701438.
Weichai WP7 Camshaft (1002128299). The camshaft times the valves and, on most of these engines, drives the injection pump. Lobe profile and gear timing therefore affect both breathing and fuelling.
Photograph both ends of the old shaft before ordering, and note the gear tooth count where it is accessible. Fitment here is decided by the drive end, not by the bearing journals.
Numbers beginning 1002 are numeric-series numbers used mainly on WP8 and WP9 assemblies and castings. On this engine, confirm the WP7 application against the engine plate before ordering.
Fit new lifters, bearings and a thrust plate with the shaft. Used lifters carry the wear pattern of the old lobes and scuff a new camshaft within minutes of running.
Ordering note. Lead time depends on whether the item is in stock or has to be produced; the position is confirmed before the order is accepted rather than after payment.
Related reading: Camshaft and Lifter Wear: Diagnosis and Replacement
| We Are 30 Years Diesel Engine Parts Supplier | |
| Brand | EPID |
| Warranty | 12 Months |
| Condition | 100%New |
| More Models | Weichai: WP7, WP7H, WP8, WP8H, 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 |
Shafts ship oiled and sleeved in a rigid tube. Bearings and a thrust plate can be fitted before delivery if requested.
Measure lift before replacing anything else. A worn lobe cannot be corrected by adjusting clearance.
Long idling during break-in is the main cause of lobe scuffing on a new shaft, because oil splash to the lobes is minimal at low speed.
Match the part number, engine rating and pump type. A shaft from a different rating can physically fit but changes valve timing and emissions. For fleets, keep one shaft and one lifter set in stock; failure stops a vehicle for days otherwise.
Oil quality and valve clearance decide camshaft life. Use the specified grade, change it at the severe-duty interval and check clearance at every major service. Keep the breather clean so oil mist does not carry abrasive dust into the valve chamber, and replace worn timing gears before they hammer the lobes.
A camshaft and its lifters wear as a pair. The lobe and the lifter face develop a matched contact pattern, and putting a used lifter onto a new lobe destroys the lobe within hours of running. Every camshaft we supply should be installed with a complete new lifter set of the same specification.
Check the lifter bores in the block as well. A lifter that cannot rotate freely in its bore will scuff its lobe, and a bore that is too tight is often the real reason an engine has eaten two camshafts. Measure with a bore gauge and compare against specification before assembly.
Camshafts are long, slender parts that bend easily in transit. They ship in rigid tubes with the journals protected, and the tube is braced inside the carton so it cannot flex. If the shaft travels in a container with heavy parts, tell us so we can place it where nothing can rest on it.
The camshaft is only one link in the gear train. A worn crank gear or a slack idler changes valve timing and hammers the lobes, which is why a rebuilt engine should have the whole train inspected. Measure gear backlash and look for a polished or stepped tooth pattern, which indicates wear rather than a machining mark. Replacing the camshaft while leaving worn gears in place is a reliable way to lose the new part.
See the Weichai camshaft category, and pair this shaft with the WP7 and WP8 water pump 1001996660 or the WP13 camshaft 1000701438.
Yes. Used lifters have a matched wear pattern and scuff a new lobe quickly.
Always verify pump timing after fitting a camshaft.
The shaft comes with its drive gear fitted. A bare shaft is available on request.
Measure valve lift at the rocker with a dial gauge; if lift is low, the lobe is worn.
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.
