Wholesale 4935793, 3802358, 3928396, 3283603, 3283602, 5524785, 3286277, 3286278, 3802970, 5473238 Cummins Water Pump Replacement for Engine 4B3.9 6B5.9 Manufacturers, Exporters

1 / 1

Wholesale 4935793, 3802358, 3928396, 3283603, 3283602, 5524785, 3286277, 3286278, 3802970, 5473238 Cummins Water Pump Replacement for Engine 4B3.9 6B5.9 Manufacturers, Exporters

Cooling water pumps with part numbers 4935793, 3802358, 3928396, 3283603, 3283602, 5524785, 3286277, 3286278, 3802970 and 5473238 are OEM-grade replacements specifically engineered for Cummins 4B3.9 (including 4BT/4BTA) and 6B5.9 (including 6BT/6BTA) series diesel engines. As the power core of the engine cooling system, its centrifugal design drives coolant circulation to efficiently dissipate heat from the cylinder block, cylinder head, and turbocharger, ensuring the engine maintains an ideal operating temperature of 85-95°C. With identical core specifications and mounting dimensions across 10 models, it offers direct interchangeability. Suitable for heavy-duty applications in commercial vehicles, construction machinery, and generator sets, it balances reliability and cost-effectiveness, serving as a premium alternative to OEM parts.

Send Inquiry

Product Description

4935793, 3802358, 3928396, 3283603, 3283602, 5524785, 3286277, 3286278, 3802970, 5473238 water pump replacement belong to the Cummins B-series engine cooling water pump system, all featuring centrifugal construction and crankshaft belt drive design. The core components comprise a corrosion-resistant pump body, wear-resistant impeller, double-row ball bearings, and graphite-ceramic mechanical seals. These products comply with Cummins original equipment specifications and are compatible with 4B3.9/6B5.9 series mechanical and electronically controlled models, covering China III to China IV emission stages.

① Basic Universal Type

Models: 3802358, 3802970
Suitable for all standard operating conditions with reliable performance.

② Enhanced Durability Type

Models: 3286277, 3286278
Features hardened pulleys for upgraded wear resistance under high mechanical stress.

③ Enhanced Optimization Type

Models: 5524785, 5473238
Features upgraded seals and bearings optimized specifically for high-load applications.

Technical Specifications

Part Name	Water Pump	Origin	China
Part Number	4935793, 3802358, 3928396, 3283603, 3283602, 5524785, 3286277, 3286278, 3802970, 5473238
Pump Type	Centrifugal cooling water pump	Drive Mode	Crankshaft belt pulley drive
Installation Interface	Same as OEM product	Purpose	Repair/replace/aftermarket
Operating Temperature	-40℃~130℃ (short-term peak)	Quality	OEM standard
Package	Standard industrial packing	Compatible Engine	Cummins 4B3.9, 4BT3.9, 4BTA3.9, 6B5.9, 6BT5.9, 6BTA5.9, etc. (For details, please refer to "Compatible Models")

Key Features

Fully compatible with all models, no installation barriers. 10 part numbers share identical mounting holes, flange interfaces, and pulley center distances with <0.02mm tolerance, enabling direct interchangeability. Compatible with Cummins OEM parts and early models like A3960342. Compatible with mainstream CPL codes (e.g., CPL 1975 for 4B3.9, CPL 8266 for 6B5.9). Installation requires no piping modifications, significantly reducing maintenance labor.
Heavy-duty construction for exceptional durability Pump body crafted from cast iron or high-strength cast aluminum, withstanding engine vibration and coolant corrosion. The impeller, crafted from wear-resistant alloy and fluid-dynamically optimized, delivers high flow at low RPM and stable pressure at high RPM. Its cooling efficiency exceeds standard aftermarket parts by 12%-15%. Dual-row ball bearings rated for ≥5000 rpm feature long-life grease lubrication. Combined with a graphite-ceramic mechanical seal (leak rate ≤0.1 ml/h), it achieves a service life exceeding 30,000 kilometers.
Multi-scenario adaptability with robust operational resilience Supports wide temperature ranges from -40°C to 130°C, suitable for harsh environments including high-temperature construction sites, high-altitude transportation, and marine operations. The hardened pulley design of models 3286277/3286278 specifically addresses high-load transmission demands in engineering machinery with frequent operation cycles; while the enhanced sealing design of models 5524785/5473238 addresses leakage prevention in humid environments like marine applications.
Quality Compliance with After-Sales Assurance The entire series undergoes bench testing with failure rates below industry averages. Warranty services are provided.

Compatible Models

Part Number	Compatible Engines	Units Containing the Part	Included into Kit	Kit the Part Includes	Replacement Parts	Related Parts
4935793	4B3.9 6B5.9 ISB3.9 CM2220 B107 ISB5.9 CM2880 B127	Water Pump (4B3.9) Water Pump (6B5.9) Water Pump (ISB3.9 CM2220 B107) Water Pump (ISB5.9 CM2880 B127)	/	/	/	/
3802358	/	/	3393350 Marine spare parts kit 3802377 Marine spare parts kit 3802378 Marine spare parts kit 3802379 Marine spare parts kit 3802380 Marine spare parts kit, 6B Marine Spares Kit 3802664 Marine spare parts kit	3283603 Water pump, SOLD IN HIGHER LEVEL ASSEMBLY OR KIT 3906698 Rectangular ring seal	3286277 Water pump, Recon Equivalent 3286277 RX 3286278 Water pump kit, Recon Equivalent 3286278 RX 3802970 Water pump, Recon Equivalent 3802970 RX 5473238 Water pump kit	/
3928396	4B3.9 6B5.9 B5.9 G ISB (Chrysler)	Water Pump (4B3.9) Water Pump (6B5.9) Water Pump (B5.9G) Water Pump (ISB (Chrysler))	3802632 Water pump 3802944 Water pump	/	3283602 Water pump, SOLD IN HIGHER LEVEL ASSEMBLY OR KIT 5524785 Water pump, OFFERED IN KIT, 5473172. KIT INCLUDES ADDITIONAL COMPONENTS TO COMPLETE INSTALLATION.	/
3283603	4B3.9 6B5.9 ISB CM550	Water Pump (4B3.9) Water Pump (6B5.9) Water Pump (ISB CM550)	3393350 Marine spare parts kit 3802358 Water pump 3802377 Marine spare parts kit 3802378 Marine spare parts kit 3802379 Marine spare parts kit 3802380 Marine spare parts kit, 6B Marine Spares Kit 3802664 Marine spare parts kit 3802970 Water pump, Recon Equivalent 3802970 RX 3804889 Marine spare parts kit 4089700 Water pump kit	/	5524785 Water pump, OFFERED IN KIT, 5473172. KIT INCLUDES ADDITIONAL COMPONENTS TO COMPLETE INSTALLATION.	/
3283602	4B3.9 6B5.9 B5.9 G ISB CM550 NH/NT 855 QSB5.9 30 CM550 QSB5.9 CM550	Water Pump (4B3.9) Water Pump (6B5.9) Water Pump (B5.9 G) Water Pump (ISB CM550) PUMP,WATER (NH/NT 855) Water Pump (QSB5.9 30 CM550) Water Pump (QSB5.9 CM550)	3802944 Water pump 3802971 Water pump, Recon Equivalent 3802971 RX 3804888 Marine spare parts kit 4089731 Water pump kit	/	5524785 Water pump, OFFERED IN KIT, 5473172. KIT INCLUDES ADDITIONAL COMPONENTS TO COMPLETE INSTALLATION.	/
5524785	4B3.9 6B5.9 B3.3 B4.5 B5.9 GAS PLUS CM556 B6.7 CM2350 B135B G5.9 ISB/ISD4.5 CM2150 B119 ISB/ISD4.5 CM2150 SN ISB/ISD6.7 CM2150 B120 ISB/ISD6.7 CM2150 SN ISB/ISD6.7 CM2880 B126 ISBE CM2150 ISBE CM800 ISBE4 CM850 QSB (Komatsu) QSB3.3 CM2150 QSB4.5 CM2250 EC QSB4.5 CM850(CM2850) QSB6.7 CM2250 QSB6.7 CM2250 EC QSB6.7 CM850(CM2850) QSB7 CM2880 B117	Water Pump (4B3.9) Water Pump (6B5.9) Water Pump (Distributor Upfit 1) (B3.3) Water Pump (B3.3) Water Pump (B4.5) Water Pump (B5.9 GAS PLUS CM556) Water Pump (B6.7 CM2350 B135B) Water Pump (G5.9)	5445095 Long block... 5445097 Long block... 5473172 Water pump kit 5475074 Long block 5475075 Long block 5562617 Long block 5565576 Long block... 5565577 Long block... 5565578 Long block... 5565579 Long block... 5621831 Long block...	/	/	/
3286277	4B3.9 6B5.9 B3.3 ISB6.7 CM2250 QSB4.5 30 CM550 QSB5.9 30 CM550	Water Pump (4B3.9) Water Pump (6B5.9) Water Pump (B3.3) Water Pump (ISB6.7 CM2250) Water Pump (QSB4.5 30 CM550) Water Pump (QSB5.9 30 CM550)	3393350 Marine spare parts kit 3802377 Marine spare parts kit 3802378 Marine spare parts kit 3802380 Marine spare parts kit 3802664 Marine spare parts kit 3804889 Marine spare parts kit	3285411 Water pump, Serviced as 3286277 3906698 Rectangular ring seal	3286278 Water pump kit 5473238 Water pump kit	/
3286278	4B3.9 / 6B5.9 B4.5 / B5.9 G / G5.9 ISB CM2150 / CM550 QSB5.9 / QSB6.7	Water Pump (4B3.9) Water Pump (6B5.9) Water Pump (B4.5)	/	3285414 Water pump 3906698 Rectangular ring seal	5473238 Water pump kit	5292738 Thermostat
3802970	4B3.9 / 6B5.9 ISB CM550	Water Pump (4B3.9) Water Pump (6B5.9)	3393350 Marine spare parts kit 3802378 Marine spare parts kit	3283603 Water pump 3906698 Rectangular ring seal	3286277 Water pump 5473238 Water pump kit	/
5473238	4B3.9 / 6B5.9 B4.5 / B5.6 ISB5.9 / ISBE / QSB6.7	Water Pump (4B3.9) Water Pump (6B5.9)	/	3906698 Rectangular ring seal 5444109 Water pump	/	/

Frequently Asked Questions

Q Which specific engine models are compatible with these 10 pump part numbers? Can they be used with the 4B3.9/6B5.9 engines meeting China V emission standards?

Core compatibility covers Cummins 4B3.9 (including 4BT/4BTA) and 6B5.9 (including 6BT/6BTA) series engines meeting China III/IV emission standards, encompassing both mechanical and electronically controlled models. This includes mainstream variants such as 4BT3.9-G12 and 6BTA5.9-C205. For National V emission models, verify the engine CPL code. Some early National V models (e.g., CPL 4988) may be compatible. However, for later National V electronically controlled upgraded models, prioritize genuine National V-specific parts to avoid affecting the emission system.

Q When replacing the water pump, besides the gasket, which other components should be replaced simultaneously? What are the installation torque and procedure requirements?

Recommended components for simultaneous replacement: Water pump drive belt, automatic tensioner pulley (if used over 20,000 km), low-silicate long-life coolant. Key installation requirements: ① Clean the lines: Drain old coolant and use a high-pressure air gun to remove debris and scale; ② Seal treatment: Apply high-temperature sealant to both sides of the gasket to prevent misalignment; ③ Torque control: Tighten bolts diagonally in a cross pattern at 22-25 N·m to prevent pump housing cracks; ④ Post-installation check: Idle for 10 minutes after startup, confirming no leaks and stable coolant temperature between 85-95°C.

Q What symptoms require immediate pump replacement? What causes correspond to different failures?

4 critical replacement symptoms and causes:
① Coolant leakage (seam/shaft end dripping): Typically caused by worn water seals or aged gaskets;
② Abnormal noise during operation (“humming”/“squeaking” sounds): Bearing wear or belt too tight/too loose;
③ Abnormal coolant temperature (overheating/slow heating): Impeller damage, thermostat failure, or insufficient coolant;
④ Impeller binding/looseness: Bearing damage or impeller corrosion—replace immediately to prevent engine overheating.

Q What maintenance is required after installing the water pump? How often should coolant be replaced?

Key maintenance points: ① Short-term: After installation, drive 200km and recheck bolt torque and coolant level; ② Routine: Check belt tension every 10,000 km (press to ensure 10-15mm deflection), inspect water pump for leaks every 20,000 km; ③ Coolant replacement: Recommended every 40,000 km or 2 years. Prioritize low-silicate coolant to prevent scale buildup clogging the pump and lines.

Q If leakage persists after installing a new water pump and the gasket has been ruled out, what other possibilities exist? How should they be addressed?

Other common causes and solutions: ① Uneven bolt torque: Re-tighten diagonally at 22-25 N·m to prevent localized overpressure causing leaks; ② Improper water seal installation: If shaft end leaks occur, the water seal may be installed in reverse or contaminants may have entered the sealing surface. Disassemble, clean, and reinstall. If leakage persists, replace the entire pump assembly. ③ Pump housing casting defect: In rare cases, the pump housing itself may have sand holes. Contact after-sales service for replacement.

Q The water pump makes abnormal noises during operation, but the belt tension is normal. What could be the cause? Is disassembly and inspection necessary?

It is highly likely an internal component failure. Disassembly and inspection are recommended: ① Bearing wear: Noise intensifies with increasing speed, and the pulley feels loose when rotated. Replace the water pump. ② Impeller rubbing against pump housing: Often caused by misalignment during installation or impeller deformation. Disassemble and adjust installation position; replace impeller if deformed. ③ Contaminants in pump chamber: Coolant debris jamming the impeller. Disassemble and clean debris; replace impeller if severely worn.