Urea Pump L4400-1205340B for Yuchai
Applicable models:Yuchai
Reference part number:L4400-1205340B，L4400-1205340A，L44001205340B，L44001205340A
| Rated output : | |
| Pulley : | |
| Size : | |
| Weight : | Net weight 4.4 |
| Packaging : | Neutral kraft paper packaging |
| Spot/Pre sale : | presale |
| Warranty : | 1 year |
| Product number : |
| Type : | urea pump |
| Specification : | |
| Pulley : | |
| Brand : | nuojin |
| Number : | L4400-1205340B |
| Quality : | renovate |
| Delivery time : | 30DAYS |
About the L4400-1205340B Urea Pump
The L4400-1205340B dosing pump meters AdBlue into the exhaust stream. Quantity accuracy matters: too little and NOx conversion falls, too much and ammonia slips through the catalyst.
The unit is supplied complete and matched to the original interfaces, so it fits with standard tools and the existing wiring or pipework. Nothing has to be adapted: connectors, brackets and mounting points follow the original design.
Specification Summary
- Integrated pump, pressure sensor and control electronics
- Sealed fluid path for diesel exhaust fluid
- Filter included in the suction path
- Direct replacement for the original module
Reference Numbers and Cross References
The part is listed under the following references:
- L4400-1205340B
- L4400-1205340A
- L44001205340B
- L44001205340A
Application Notes
On Yuchai installations the pump is mounted at the tank or on the chassis. Access is usually the deciding factor in how long the job takes.
Confirm the number against the vehicle before ordering. Where a model was built with more than one variant, the part number is the only reliable guide.
Failure Modes
Fluid quality decides life. Contaminated or diluted AdBlue crystallises in the pump and blocks the filter, and the pump then runs dry against a rising pressure error.
Electronics fail with heat and vibration. A module that loses communication or reads pressure incorrectly will stop dosing and trigger a derate.
Fault Symptoms
- NOx efficiency or dosing fault code stored
- Engine derate or torque limitation
- White crystal deposits around the dosing injector
- Rough running after cold start
- Diesel exhaust fluid consumption higher or lower than normal
Checking Before Replacement
Check fluid quality and the tank filter. Contaminated AdBlue will destroy a new module in a short time.
Diagnose before replacing. Most repeat failures come from a fault that was left in place.
Installation Notes
Flush the lines, fit a new filter and clean the tank neck before fitting the module. Prime the system with the diagnostic routine, clear the codes and run a dosing test. Keep the fluid path clean: any grit that enters will end up in the pump.
Related Parts to Check at the Same Time
- Urea filter
- Dosing injector
- NOx sensor
- Urea tank and lines
Quality Control and Supply
Every batch is function-tested before packing. Hejian Nuojin Auto Parts Co., Ltd. supplies in neutral packaging with a one-year warranty.
Frequently Asked Questions
Can it be fitted without special tools?
Standard hand tools cover most of the job. Refrigerant work needs recovery and charging equipment, and urea systems need a diagnostic routine to prime.
What else should be replaced at the same time?
Everything that touches the new unit: filter and lines for a urea pump, clutch and seals for a gearbox, drier and expansion valve for a compressor.
Why did the original fail?
Contamination, heat and wear account for most failures. Clean installation and correct consumables prevent a repeat.
Is a warranty included?
Yes, one year against manufacturing defects, with neutral packing for resale.
