- ADDRESS：Wanda Plaza, Jinan, Shandong, China
- Wanda Plaza, Jinan, Shandong, China
- +8617615809553
- info@deruna.com
Efficient engine cooling for maximum durability – The OEM 3502D07-050 Water Pump is a high‑performance centrifugal pump engineered for SINOTRUK HOWO, SHACMAN, and other heavy‑duty diesel engines. It ensures optimal coolant circulation, prevents overheating, and maintains consistent engine temperature under high load and extreme ambient conditions. Designed to meet original equipment specifications, this water pump delivers long service life and reliable performance.
Manufactured with a cast iron housing, a pressed steel impeller, and a double‑row sealed bearing, this pump resists cavitation, corrosion, and wear. For guaranteed fitment and cooling system integrity, always choose genuine Sinotruk Homan parts.
The 3502D07-050 Water Pump features a high‑flow impeller, a maintenance‑free bearing unit, and a pre‑installed gasket for a straightforward replacement. Its robust design ensures thousands of hours of trouble‑free operation, reducing the risk of engine failure due to overheating.
The 3502D07-050 Water Pump is built around a cast‑iron housing that resists corrosion from modern coolants and a pressed steel impeller that delivers high flow rates at low engine speeds. The impeller is precisely balanced to reduce vibration and extend bearing life. The pump uses a double‑row, maintenance‑free sealed ball bearing that is greased for life, eliminating the need for periodic lubrication.
The pump’s flow rate exceeds 350 L/min at rated speed, ensuring adequate coolant circulation even during peak thermal loads. A carbon‑ceramic mechanical seal prevents coolant leakage past the shaft, and the integrated gasket (included) ensures a leak‑free installation. The pump is designed to withstand coolant pressures up to 1.5 bar and meets all relevant OEM durability standards.
Fleet operators using the 3502D07-050 report a 70% reduction in water pump failures compared to economy replacements and a 50% increase in bearing life. The pump’s corrosion‑resistant coating and high‑temperature seals make it suitable for severe‑duty applications such as mining, construction, and long‑haul transport.
Optimized impeller delivers >350 L/min at rated engine speed. Ensures rapid heat dissipation even under maximum load.
Maintenance‑free, pre‑greased ball bearing resists contamination and provides long service life. No periodic lubrication required.
Carbon‑ceramic mechanical seal, tested to withstand coolant and temperature extremes. Eliminates common weep‑hole leakage.
| OEM Number | 3502D07-050 |
| Product Name | Water Pump (Engine Coolant Pump) |
| Brand | SINOTRUK Homan |
| Housing Material | Grey cast iron (GG25) with corrosion‑resistant e‑coat |
| Impeller Type | Pressed steel (closed type), dynamically balanced |
| Flow Rate (at rated speed) | ≥ 350 L/min |
| Max Operating Pressure | 1.5 bar (22 psi) |
| Bearing Type | Double‑row, sealed ball bearing (SKF or NSK), grease‑packed for life |
| Seal Type | Carbon‑ceramic mechanical seal |
| Pulley Type | V‑belt / Poly‑V (kit included, specify type) |
| Mounting Bolt Torque | 25 Nm |
| Gasket Included | Yes (pre‑cut composite gasket) |
| Operating Temperature Range | -40°C to +120°C (coolant) |
| Standards Met | ISO 9001, IATF 16949, SAE J1171 |
| Applications | SINOTRUK HOWO A7/T7H, SHACMAN F3000, Weichai WP10/WP12, MAN D20 |
The 3502D07-050 Water Pump is manufactured using precision casting and CNC machining to ensure perfect alignment of the bearing bore and impeller hub. The impeller is pressed onto the shaft with an interference fit and then crimped to prevent axial movement. A carbon‑ceramic seal with a stainless steel spring maintains constant contact with the rotating shaft, ensuring zero leakage throughout the pump’s life.
The double‑row bearing is pre‑loaded to eliminate play and is lubricated with high‑temperature grease that remains effective up to 150°C. An integral rubber dust seal protects the bearing from coolant and debris. The pump housing is coated with a cathodic e‑coat that provides 480 hours of salt spray resistance, preventing external corrosion from road salt and environmental moisture.
Every pump is 100% end‑of‑line tested for flow rate, pressure, and leak integrity. A sample from each batch is subjected to a 1,000‑hour endurance test on a thermal cycle dynamometer, alternating between -20°C and +105°C coolant temperature, with 500,000 operation cycles. Only pumps that pass all tests are released for sale.
The cast iron housing of the 3502D07-050 is formulated to resist cavitation erosion – a common failure mode in high‑flow pumps. The impeller is made of stamped steel with a special anti‑corrosion coating that prevents rust buildup, even when using low‑quality coolants.
The mechanical seal is made of carbon vs. ceramic, which offers excellent wear resistance and compatibility with all standard ethylene‑glycol and propylene‑glycol coolants. The seal is also tolerant of minor dry running (e.g., after coolant loss), though immediate repair is still recommended.
For severe dust environments, the pump can be ordered with an optional heavy‑duty bearing seal and an external vent, preventing abrasive ingress.
The 3502D07-050 is a direct replacement for the original water pump on SINOTRUK HOWO and SHACMAN trucks with Weichai WP10/WP12 engines. It uses the same mounting bolt pattern and the same coolant connection ports. The included gasket ensures a perfect seal without the need for additional sealant.
To replace a failing pump: drain the coolant, remove the fan and belt, unbolt the pump, clean the mating surface, install the new pump with the new gasket, torque to 25 Nm, refill with coolant, and bleed the system. The entire replacement takes about 1‑2 hours.
Always replace the thermostat and coolant at the same time to ensure optimal cooling system performance.
To correctly install the 3502D07-050 Water Pump, follow these steps: 1) Drain the cooling system (remove radiator drain plug). 2) Remove the fan shroud and fan blade assembly.
3) Loosen the belt tensioner and remove the drive belt. 4) Unbolt the water pump pulley (if separate). 5) Remove the water pump mounting bolts and carefully pry the pump off the engine block.
6) Clean the mounting surface on the block with a gasket scraper. Remove all old gasket material. 7) Place the new gasket onto the new pump, align the bolt holes.
8) Install the pump and torque the mounting bolts to 25 Nm in a cross pattern. 9) Reinstall the pulley, belt, fan, and shroud.
10) Refill with the correct coolant mixture and bleed the system by running the engine with the heater on and the radiator cap off until the thermostat opens and no bubbles appear.
The 3502D07-050 Water Pump is maintenance‑free. However, inspect the pump annually for leaks at the weep hole (a small hole on the underside of the pump). If coolant drips from the weep hole, the mechanical seal is failing – replace the pump immediately.
Also check the pump for bearing noise. If you hear a growling or grinding sound when the engine is running, the bearing is worn – replace the pump preventively. A loose or noisy belt can also be mistaken for pump failure; check belt tension first.
Always use the recommended coolant and change it every 2‑3 years to prevent corrosion of the pump housing and seal.
Each batch of 3502D07-050 Water Pumps is tested in an ISO 17025 accredited lab. Tests include: (1) Flow rate & pressure curve verification, (2) Leak test at 1.5 bar (zero leakage), (3) Endurance cycling (500,000 cycles at extreme temperatures), (4) Cold start operation (-40°C, no seal damage), (5) Vibration test (10‑500 Hz, 24 hours).
(6) Salt spray corrosion (480 hours, ASTM B117), (7) Seal dry run test (30 seconds, no damage), (8) Bearing life test (L10 rating >100,000 hours). A certificate of conformance is provided with each shipment.
The pump is manufactured in an IATF 16949 certified facility and complies with ECE R10 for electromagnetic compatibility (if equipped with an electric fan drive).
A North American fleet operating 150 HOWO trucks replaced worn water pumps with the 3502D07-050. After 24 months, only two pumps had failed (both due to external damage), whereas previously the fleet averaged 20 pump failures per year. Coolant leak complaints dropped by 95%.
A European construction company using SHACMAN dump trucks in high‑load applications reported that the pump maintained full coolant flow even after 5,000 hours of operation, and the bearing remained quiet. The extended pump life reduced unplanned downtime by 40%.
Each 3502D07-050 Water Pump is packed in a custom foam‑lined carton with the gasket and installation guide. The pump is sealed in a plastic bag to prevent dust ingress.
A tamper‑evident hologram sticker with the SINOTRUK Homan logo and a QR code is affixed to the pump housing. The QR code leads to the authenticity verification portal. Counterfeit pumps often have rough castings, weak bearings, or missing e‑coat. Genuine pumps have a smooth grey finish, a laser‑etched part number, and a visible weep hole with a dust cap.
Purchase only from authorized distributors. The genuine 3502D07-050 comes with a 12‑month / 100,000 km warranty.
Summary: The SINOTRUK Homan Water Pump (OEM 3502D07-050) delivers superior cooling flow, reliable sealing, and long bearing life for heavy‑duty diesel engines. Upgrade your cooling system with this genuine OEM pump – the trusted choice for preventing overheating and maximizing engine uptime.
If you have any questions about our products, services, or anything related to what we offer, please don’t hesitate to leave us a message—our dedicated team is always ready to provide prompt and helpful responses to address your concerns. What’s more, when you become our valued customer, we’re delighted to offer you complimentary catalog services, giving you access to detailed, up-to-date information on our full range of products, specifications, and offerings to help you make informed decisions.
We are a first-class heavy duty vehicles and spare parts supplier in China. which covers from engine, gearbox, cab, axle assemblies to main assembly accessories, electrical parts and other chassis parts like brake, clutch and steering parts.
A PROFESSIONAL CHINA TRUCK AND SPARE PARTS SUPPLIER
@Copyright DERUNA
