Model: WD615 / WP10
Part Number: 61500070021
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 engines have used several oil pump numbers over their long production life, and part 61500070021 is one of them alongside 61500070030 and 612600070365. The differences are usually in the drive gear, the pick-up arrangement or a production revision of the relief valve.
Confirm the engine plate and the old pump number before ordering. Where the engine has been rebuilt with a replacement front cover, the mounting face may have changed too, and that is not visible from the part number alone.
On a WD615 the pump feeds the main and rod bearings, the camshaft, the valve train and the piston cooling jets. It must deliver enough volume at hot idle to protect the bearings, and hold pressure at rated speed without exceeding the limit set by its relief valve.
Wear reduces volume before it reduces peak pressure. A tired pump often shows normal pressure at speed and a worrying drop at hot idle, which is easy to dismiss and is exactly when bearing protection matters most.
Every pump is run on a test bench rather than only inspected, because flow cannot be judged by eye. The tests cover the properties that decide whether the pump will protect the engine in service.
Low pressure is the headline symptom, but the circumstances tell you what is actually wrong. Pressure that is low only when hot points as much to worn bearings as to a worn pump, while pressure that recovers instantly with engine speed points to the relief valve or clearances.
Check oil level and condition, replace the filter, inspect the strainer, then measure pressure with a mechanical gauge. Only after those steps should the relief valve and the pump come under suspicion, because a blocked strainer and a faulty sender both produce identical readings at the dash.
Priming is the step most often skipped and the one that decides whether the bearings survive the first minute after assembly.
On these engines the pump also supplies the piston cooling jets. A pump that holds pressure but has lost volume still allows crown temperatures to climb, and the damage appears as a scored or cracked piston rather than as low oil pressure.
Match the part number, the engine rating and the drive type. If the engine has been rebuilt with a replacement front cover, check that the mounting face and drive gear match. Send a photo of the old pump beside a ruler and we will confirm the casting before shipping.
Most premature failures come from contaminated oil. Use the specified grade, change it at the severe-duty interval and never run with a leaking injector that thins the oil with diesel. Keep the cooling system healthy, because sustained overheating reduces oil film strength.
Fleets that run regular oil analysis catch bearing wear before pressure starts to fall. Rising iron and lead in the report indicate that the oil film is breaking down somewhere in the engine, and the pump is one of the first parts worth checking. Analysis costs little compared with a crankshaft, and it works even when nobody watches the gauge.
Compare the drive gear and pick-up, or send us a photo of the old pump.
Yes, the mounting gasket and O-ring are supplied.
Yes. A blocked strainer, stuck relief valve, worn bearings or a faulty sender all mimic pump failure.
At every major overhaul, or whenever the front cover is removed.
Browse the Weichai pump category, and pair the pump with the WD615 oil pump 61500070030 or the WD615 crankshaft 1000072536.
Weichai WD615 Oil Pump (61500070021). Lubrication starts here. The gear set, relief valve and drive must all match the housing, and a mismatch shows up as low pressure from the first start.
Ask whether the relief valve is set for your application. The valve is part of the assembly on these units and its setting is not adjustable in service.
Numbers beginning 6150 belong to the WD615 lineage. Because this family was produced for decades across more than one factory, two parts with neighbouring numbers can be entirely different components. On this engine, confirm the WD615 application against the engine plate before ordering.
Replace the suction-side O-rings and gaskets with the pump. A hardened O-ring at the pick-up joint draws air and reproduces exactly the symptom the new pump was meant to cure.
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: Oil Pump Diagnosis: Low Pressure, Wear and Replacement
| 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 pump is run on a test bench rather than only inspected, because flow cannot be judged by eye. The tests cover the properties that decide whether the pump will protect the engine in service.
Low pressure is the headline symptom, but the circumstances tell you what is actually wrong. Pressure that is low only when hot points as much to worn bearings as to a worn pump, while pressure that recovers instantly with engine speed points to the relief valve or clearances.
Check oil level and condition, replace the filter, inspect the strainer, then measure pressure with a mechanical gauge. Only after those steps should the relief valve and the pump come under suspicion, because a blocked strainer and a faulty sender both produce identical readings at the dash.
Priming is the step most often skipped and the one that decides whether the bearings survive the first minute after assembly.
On these engines the pump also supplies the piston cooling jets. A pump that holds pressure but has lost volume still allows crown temperatures to climb, and the damage appears as a scored or cracked piston rather than as low oil pressure.
Match the part number, the engine rating and the drive type. If the engine has been rebuilt with a replacement front cover, check that the mounting face and drive gear match. Send a photo of the old pump beside a ruler and we will confirm the casting before shipping.
Most premature failures come from contaminated oil. Use the specified grade, change it at the severe-duty interval and never run with a leaking injector that thins the oil with diesel. Keep the cooling system healthy, because sustained overheating reduces oil film strength.
Fleets that run regular oil analysis catch bearing wear before pressure starts to fall. Rising iron and lead in the report indicate that the oil film is breaking down somewhere in the engine, and the pump is one of the first parts worth checking. Analysis costs little compared with a crankshaft, and it works even when nobody watches the gauge.
Browse the Weichai pump category, and pair the pump with the WD615 oil pump 61500070030 or the WD615 crankshaft 1000072536.
Compare the drive gear and pick-up, or send us a photo of the old pump.
Yes, the mounting gasket and O-ring are supplied.
Yes. A blocked strainer, stuck relief valve, worn bearings or a faulty sender all mimic pump failure.
At every major overhaul, or whenever the front cover is removed.
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.
