Model: WD615 / WP10
Part Number: 612600060307
Brands: Weichai Power
Engine Model: WD615, WD615E2, WD10, WP10, WP10G
Engine Type: Diesel
Scope of application: heavy trucks, buses, construction machinery, generator sets
A diesel engine turns roughly a third of its fuel energy into work. The rest becomes heat that must leave through the cooling system, and the water pump is what keeps that heat moving. Part 612600060307 is the belt-driven coolant pump for the WD615 and WP10 family, circulating coolant through the block, head, oil cooler and radiator.
The pump is a simple part with a hard job. It runs at engine speed, in a hostile environment of heat, vibration and sometimes contaminated coolant. When it weakens, the engine does not overheat at idle; it overheats under load, exactly when the driver needs the power.
The pump fits WD615 and WP10 engines in heavy trucks, buses, loaders and generator sets. Industrial and marine derivatives can use a different pulley or inlet elbow even when the pump casting is the same, so confirm the engine plate and the old pump number before ordering.
The pump uses a cast iron housing, a cast impeller, a sealed bearing cartridge lubricated for life and a mechanical face seal. Every unit is checked before packing: impeller clearance, bearing play and noise, seal integrity under pressure and flow at rated speed against the original curve.
Each pump is supplied with a new gasket and O-ring, hub protected so the seal is not disturbed in transit.
The earliest sign is coolant weep from the hole under the housing. Noise comes later, when the bearing has lost lubricant, and a wobbling fan is the last warning before collapse.
Do not wait for the bearing to fail completely. A collapsed bearing lets the fan hit the radiator, turning a cheap repair into a large one.
Most premature pump failures trace back to belt alignment. A worn tensioner, a misaligned idler or a pulley with the wrong offset side-loads the bearing continuously, and the seal begins to weep within a few thousand kilometres. Before fitting a new pump, check the belt path with a straight edge across the pulleys and replace any component with play.
Match the engine plate, the old pump number and the pulley type. Road, industrial and marine versions can differ in pulley diameter and inlet position even when the body casting is identical. Send a photo of the old pump beside a ruler and we will confirm before shipping.
Pumps last longest in clean systems with correct chemistry. Flush the radiator at interval, keep the coolant mixture in specification, replace the thermostat and pressure cap when due, and clean the core externally in dusty operations. Scale inside the housing reduces flow and increases the load on the seal, so a neglected system shortens pump life directly.
Because this pump fits several WD615 and WP10 ratings, fleets can standardise on one part number. Keep two on the shelf, one for fitment and one as a loan unit, together with gaskets and thermostat housing seals so that a repair is completed in one visit.
Overheating has several causes and the pump is only one. Check coolant level and condition, confirm the thermostat opens, look for a blocked radiator core, test the fan drive and inspect the belt for slip. Only when those are ruled out should the pump come under suspicion.
A useful test is to compare radiator top and bottom hose temperatures once the engine is warm. A large difference points to restricted flow through the core, not a weak pump. On engines with a viscous fan, a seized hub produces exactly the same symptom as a failing pump at low speed, so check it before ordering parts.
Yes, the gasket and O-ring are supplied.
Only to reach a workshop. Coolant loss quickly leads to overheating.
The pump comes with the hub. Tell us if you need the complete assembly.
Remove the belt and spin the pump by hand. Roughness or play confirms the bearing.
Browse the Weichai pump category, and pair the pump with the WD615 full gasket kit 612600040355 or the WD615 cylinder head 61560040040.
Weichai WD615 Water Pump (612600060307). Cooling depends on this pump moving volume, not pressure. The seal and bearing are the parts that fail, and both are affected by belt tension.
Measure pulley diameter and the distance from the mounting face to the pulley centreline. A correct body casting with the wrong pulley destroys belt alignment within hours.
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.
Do not over-tension the belt. Excess tension loads the pump bearing directly and is a common cause of repeat failures.
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: Cylinder Liner Cavitation: Causes, Symptoms and Prevention
| 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 |
The pump uses a cast iron housing, a cast impeller, a sealed bearing cartridge lubricated for life and a mechanical face seal. Every unit is checked before packing: impeller clearance, bearing play and noise, seal integrity under pressure and flow at rated speed against the original curve.
Each pump is supplied with a new gasket and O-ring, hub protected so the seal is not disturbed in transit.
The earliest sign is coolant weep from the hole under the housing. Noise comes later, when the bearing has lost lubricant, and a wobbling fan is the last warning before collapse.
Do not wait for the bearing to fail completely. A collapsed bearing lets the fan hit the radiator, turning a cheap repair into a large one.
Most premature pump failures trace back to belt alignment. A worn tensioner, a misaligned idler or a pulley with the wrong offset side-loads the bearing continuously, and the seal begins to weep within a few thousand kilometres. Before fitting a new pump, check the belt path with a straight edge across the pulleys and replace any component with play.
Match the engine plate, the old pump number and the pulley type. Road, industrial and marine versions can differ in pulley diameter and inlet position even when the body casting is identical. Send a photo of the old pump beside a ruler and we will confirm before shipping.
Pumps last longest in clean systems with correct chemistry. Flush the radiator at interval, keep the coolant mixture in specification, replace the thermostat and pressure cap when due, and clean the core externally in dusty operations. Scale inside the housing reduces flow and increases the load on the seal, so a neglected system shortens pump life directly.
Because this pump fits several WD615 and WP10 ratings, fleets can standardise on one part number. Keep two on the shelf, one for fitment and one as a loan unit, together with gaskets and thermostat housing seals so that a repair is completed in one visit.
Overheating has several causes and the pump is only one. Check coolant level and condition, confirm the thermostat opens, look for a blocked radiator core, test the fan drive and inspect the belt for slip. Only when those are ruled out should the pump come under suspicion.
A useful test is to compare radiator top and bottom hose temperatures once the engine is warm. A large difference points to restricted flow through the core, not a weak pump. On engines with a viscous fan, a seized hub produces exactly the same symptom as a failing pump at low speed, so check it before ordering parts.
Browse the Weichai pump category, and pair the pump with the WD615 full gasket kit 612600040355 or the WD615 cylinder head 61560040040.
Yes, the gasket and O-ring are supplied.
Only to reach a workshop. Coolant loss quickly leads to overheating.
The pump comes with the hub. Tell us if you need the complete assembly.
Remove the belt and spin the pump by hand. Roughness or play confirms the bearing.
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.
