Description: Doser Pump Is Used Primarily For BOSCH HPCR Fuel Systems On Euro V Automotive 6.7L ISB/QSB
Condition: New
Brand: Cummins
Part Number: 5273338
Fitment Guide:
Engines: 6C8.3, ISB4.5 CM2150 SN, ISD4.5 CM2150 SN, ISD6.7 CM2150 SN, ISB6.7 CM2150 SN, ISB4.5 CM2150, ISBE4 CM850, ISL CM2150, ISL9 CM2150 SN, ISM11 CM876 M103, ISM11 CM876 SN, ISX15 CM2250 SN
A doser pump (also called a dosing pump or DEF pump in some systems) is a device that precisely delivers a measured amount of fluid into a process or system.
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1. Emissions Control in Diesel Engines
In diesel trucks, buses, and heavy equipment, a doser pump is used in the SCR (Selective Catalytic Reduction) system.
It:
- Pumps Diesel Exhaust Fluid (DEF) from the DEF tank.
- Delivers the correct amount of DEF to the exhaust.
- Helps convert harmful nitrogen oxides (NOx) into harmless nitrogen and water.
- Enables the vehicle to meet emissions regulations.
Benefits:
- Reduced emissions.
- Compliance with environmental standards.
- Improved engine operation.
2. Chemical Injection
In industrial and water-treatment systems, a doser pump:
- Injects chemicals at precise rates.
- Controls chemical concentration.
- Prevents over- or under-dosing.
Common uses:
- Water purification
- Chlorination systems
- pH control
- Boiler and cooling tower treatment
3. Fuel and Additive Dosing
Some engines and industrial systems use doser pumps to:
- Inject fuel additives.
- Supply fuel for regeneration of emission-control devices such as diesel particulate filters (DPFs).
- Improve combustion or system performance.
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Signs of Faulty:
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1. Check Engine Light or Warning Messages
- Check engine light illuminates.
- SCR, DEF, or emissions system warnings appear on the dashboard.
- Diagnostic trouble codes (DTCs) are stored in the engine computer.
2. Engine Derate (Reduced Power)
- The vehicle loses power.
- Maximum speed may be limited.
- The engine enters a protection mode due to emissions-system faults.
3. Increased Emissions
- The SCR system cannot reduce NOx emissions properly.
- The vehicle may fail an emissions test.
4. Abnormal DEF Consumption
- DEF level drops unusually fast (over-dosing).
- DEF level barely changes (under-dosing or no dosing).
5. Poor SCR Performance Faults
Common fault descriptions may include:
- Low DEF pressure
- DEF dosing malfunction
- SCR efficiency below threshold
- Dosing valve performance issues
6. Crystallized DEF Deposits
- White crystal deposits around DEF lines, fittings, or the injector.
- Can indicate leakage or improper dosing.
7. Difficulty Completing Regeneration
On some systems that use dosing for regeneration:
- Regeneration fails or takes longer than normal.
- DPF-related fault codes may appear.
8. Unusual Pump Noise
- Pump runs excessively.
- Clicking, grinding, or whining noises.
- No pump operation when commanded by diagnostics.
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Manufacturer information
Cummins® is a worldwide leader in the production of engines, agricultural components, and other power-generating devices for various industries, including medium and heavy duty trucks, light commercial vehicles, buses, agriculture, and construction. Founded in 1919, this company stays true to its mission of making people's lives better by continuously improving its product line-up and introducing new solutions for a more prosperous world. Its core values—integrity, diversity and inclusion, excellence, caring, and teamwork—are what make it a successful company today—a worldwide leader with a network of more than 600 company-owned and independent distributors and almost 6,000 dealers in approximately 190 countries.
Warranty
First Truck Parts offers a 365-days warranty for all types of parts and in any condition. The warranty applies only to buyers who have placed an order on our website.
