Model: WD615 / WP10
Part Number: 61500070030
Brands: Weichai Power
Engine Model: WD615, WD615E2, WD10, WP10, WP10G
Engine Type: Diesel
Scope of application: heavy trucks, buses, construction machinery, generator sets
On a WD615 or WP10 the pump feeds main and rod bearings, the turbocharger, the valve train and the piston cooling jets. Part 61500070030 is the gear-type pump for these engines, driven from the front gear train and fitted with an integrated relief valve that limits maximum pressure at high speed.
The system is surprisingly sensitive to pump condition. A pump that has lost a few percent of its volumetric efficiency still holds pressure at rated speed but drops sharply at hot idle, which is exactly when bearing protection matters most.
The pump fits WD615 and WP10 engines in heavy trucks, buses, loaders, excavators and generator sets. Confirm the engine plate and the old pump number. Industrial and marine variants can use a different pick-up, and a mismatched pick-up starves the pump at high load.
Every pump is run on a test bench rather than only inspected. Flow is measured at rated speed against the original curve, the relief valve is opened and its pressure recorded, gear backlash and end clearance are measured, and the housing and joints are leak tested.
Pumps ship oiled and plugged, with the drive gear fitted and keyed as original.
Confirm with a mechanical gauge at the main gallery. A blocked strainer imitates a worn pump exactly.
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. Recording cold idle, hot idle and rated speed gives a clear diagnosis and avoids buying parts that are not needed.
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.
On these engines the pump also supplies the piston cooling jets. A pump that delivers pressure but not enough volume still allows crown temperatures to climb, and the damage appears as a scored or cracked piston rather than low oil pressure. If pistons have failed without an obvious cause, measure flow before blaming the pistons.
After assembly, measure pressure at three points: cold idle, hot idle and rated speed, then compare with specification. A pump that holds rated pressure but drops at hot idle usually has worn bearings downstream. Also check the filter bypass and the oil cooler for restriction.
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 at the bearings.
The turbocharger is the furthest component downstream in the lubrication circuit and the most sensitive to flow. A pump that holds pressure but has lost volume still feeds the bearings adequately, while the turbo receives less oil than it needs at high boost. The result is a failed turbo that is replaced without the real cause being found, followed by a second failure.
When a turbo has failed on a WD615, check oil flow at the turbo feed line before fitting a new unit. A restricted line or a tired pump will destroy the replacement just as quickly.
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.
The pump comes with its drive gear fitted and timed as original.
At every major overhaul, or whenever the front cover is removed.
Browse the Weichai pump category, and pair the pump with the WD615 full gasket kit 612600040355 or the WD615 crankshaft 1000072536.
Weichai WD615 Oil Pump (61500070030). The oil pump moves a fixed volume per revolution. Pressure is created by the resistance that volume meets in the galleries and bearings, not by the pump alone.
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.
Prime the pump before the first start and confirm oil pressure at the gauge before allowing the engine to run. Never crank a fresh rebuild hoping pressure will arrive.
Ordering note. For fleet customers, a consolidated stock list can be quoted against the engine plates in service, which usually exposes duplicated part numbers across similar units.
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. Flow is measured at rated speed against the original curve, the relief valve is opened and its pressure recorded, gear backlash and end clearance are measured, and the housing and joints are leak tested.
Pumps ship oiled and plugged, with the drive gear fitted and keyed as original.
Confirm with a mechanical gauge at the main gallery. A blocked strainer imitates a worn pump exactly.
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. Recording cold idle, hot idle and rated speed gives a clear diagnosis and avoids buying parts that are not needed.
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.
On these engines the pump also supplies the piston cooling jets. A pump that delivers pressure but not enough volume still allows crown temperatures to climb, and the damage appears as a scored or cracked piston rather than low oil pressure. If pistons have failed without an obvious cause, measure flow before blaming the pistons.
After assembly, measure pressure at three points: cold idle, hot idle and rated speed, then compare with specification. A pump that holds rated pressure but drops at hot idle usually has worn bearings downstream. Also check the filter bypass and the oil cooler for restriction.
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 at the bearings.
The turbocharger is the furthest component downstream in the lubrication circuit and the most sensitive to flow. A pump that holds pressure but has lost volume still feeds the bearings adequately, while the turbo receives less oil than it needs at high boost. The result is a failed turbo that is replaced without the real cause being found, followed by a second failure.
When a turbo has failed on a WD615, check oil flow at the turbo feed line before fitting a new unit. A restricted line or a tired pump will destroy the replacement just as quickly.
Browse the Weichai pump category, and pair the pump with the WD615 full gasket kit 612600040355 or the WD615 crankshaft 1000072536.
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.
The pump comes with its drive gear fitted and timed as original.
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.
