Model: WP7
Part Number: 610800070242
Brands: Weichai Power
Engine Model: WP7, WP7H
Engine Type: Diesel
Scope of application: medium and heavy trucks, buses, construction machinery, generator sets
Oil pressure is the engine's first line of defence. Part 610800070242 is the gear-type oil pump for the Weichai WP7, drawing oil from the sump, pressurising it and pushing it through the filter, main galleries, crankshaft and up to the cylinder head. On this engine family the pump also feeds the piston cooling jets, so flow matters as much as pressure.
When the pump wears, the symptom is rarely a sudden warning light. Pressure falls slowly at hot idle, oil temperature rises and bearing wear begins long before the driver notices anything.
The pump fits WP7 and WP7H engines in trucks, buses, loaders and generator sets. Confirm the engine plate and the old pump number before ordering. Industrial and marine variants can use a different pick-up arrangement even when the pump body looks identical, 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.
Low oil pressure is the headline symptom, but the details matter. Pressure that is low only when hot points to worn bearings as much as a worn pump. Pressure that recovers instantly with engine speed points to the relief valve or pump clearances.
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.
Fitting a pump without testing the rest of the system wastes the part. 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, not a pump fault. Also check that the filter bypass is not stuck open.
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.
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 WP7 and WP8 oil pump 610800070312 or the WP7 and WP8 full gasket kit 1001514985.
Weichai WP7 Oil Pump (610800070242). 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.
Compare the old pump number and photograph the drive end. A pump with the wrong drive bolts up and fails to feed correctly.
Numbers beginning 6108 belong to the WP7 and WP8 families. These engines share architecture but differ in detail, so a part that fits one will not necessarily suit the other without checking the casting. On this engine, confirm the WP7 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. Mixed pallets are accepted, so a single order can carry the block, the gasket set and the small seals together instead of arriving in three shipments.
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: WP7, WP7H, 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.
Low oil pressure is the headline symptom, but the details matter. Pressure that is low only when hot points to worn bearings as much as a worn pump. Pressure that recovers instantly with engine speed points to the relief valve or pump clearances.
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.
Fitting a pump without testing the rest of the system wastes the part. 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, not a pump fault. Also check that the filter bypass is not stuck open.
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.
Browse the Weichai pump category, and pair the pump with the WP7 and WP8 oil pump 610800070312 or the WP7 and WP8 full gasket kit 1001514985.
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.
