The part is the heart of the common rail fuel injection system on the HOWO MAX 4X2 tractor. A genuine high pressure oil pump generates up to 1800 bar of fuel pressure, ensuring optimal atomization and combustion efficiency. This HOWO kit includes the pump metering unit, which precisely controls fuel flow to maintain the correct rail pressure. Every component of this high pressure oil pump assembly is matched to the MC13 engine platform. When you choose authentic Howo Parts, you receive a complete high pressure oil pump engineered for the MC13 engine. For a full common rail overhaul, also see our common rail system kit.
The part metering unit is an electronically controlled proportional solenoid valve mounted on the inlet side of The part. One unit is supplied, made from high grade steel with a precision machined valve body. This component is also known as the MPROP (Metering Proportional Valve) or fuel metering unit.
It regulates the amount of fuel entering the plunger chamber based on PWM signals from the ECU. The part metering unit can operate in maximum, partial, or zero fuel delivery states, allowing the common rail system to maintain stable pressure across all engine operating conditions. The device has a coil resistance of approximately 8 15 ohms and operates on 24V DC. This high pressure oil pump metering unit is a critical part; if it fails, the engine may experience power loss, rough idle, or stalling. Proper function of The part directly impacts fuel efficiency and power output.
High pressure oil pump – genuine HOWO common rail pump and metering unit kit
| Material Encoding | Name | 202V11103-0007 | High pressure oil pump metering unit |
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The part metering unit is controlled by the ECU via PWM signals, allowing infinitely variable fuel flow regulation. This ensures the common rail pressure stays precisely at the target value, optimizing combustion. A properly functioning high pressure oil pump is vital for engine performance.
The part uses the Bosch CB18 platform, rated for up to 1800 bar rail pressure. It is a dual plunger, in line unit with integrated vane pump and metering valve, designed to withstand harsh fuel qualities. This high pressure oil pump platform is proven in millions of heavy duty vehicles.
The part is driven by the engine gear train with a 1:2 transmission ratio, ensuring correct speed. The metering unit is mounted directly on The part inlet, simplifying the fuel circuit and reducing leak points.
This high pressure oil pump metering unit is factory calibrated to the MC13 engine ECU. The electrical connector, thread pitch, and sealing dimensions match the original high pressure oil pump exactly, guaranteeing plug and play installation without any programming.
The part is a dual plunger, in line unit driven by the engine crankshaft gear train. It draws fuel from the tank through an internal vane pump, which provides low pressure fuel to The part inlet. The metering unit then regulates how much fuel enters the high pressure plunger chamber based on ECU commands. As the plunger rises, it compresses the fuel to up to 1800 bar and pushes it through the outlet valve into the common rail. This entire high pressure oil pump assembly ensures consistent rail pressure under all load conditions.
The metering unit is a proportional solenoid valve; the ECU controls its opening by varying the PWM duty cycle. At idle, The part metering unit is almost closed, delivering only the small amount of fuel needed. Under full load, it opens fully to supply maximum flow. If The part metering unit fails closed, the engine will stall; if it fails open, the rail pressure can spike, opening the pressure limiting valve. Therefore, a genuine high pressure oil pump metering unit is essential for reliable operation.
Before installation, relieve fuel system pressure and disconnect the battery. Remove the old metering unit from The part using a suitable socket.
Clean the mounting bore and sealing surfaces. Lubricate the new O ring with clean diesel fuel. Insert the new high pressure oil pump metering unit into the pump, ensuring the alignment key engages correctly. Torque the retaining screw or nut to 8 Nm (do not overtighten). Reconnect the electrical connector.
Reconnect the battery. Prime the fuel system using the electric priming pump. Start the engine and check for fuel leaks around The part metering unit. If no leaks are present, the installation is complete. Always use a genuine HOWO high pressure oil pump metering unit; aftermarket units may have incorrect flow characteristics.
This high pressure oil pump metering unit is specifically designed for the MC13 engine used in the HOWO MAX 4X2 tractor. It fits the Bosch CB18 pump platform, which is standard on MC13 engines from 2018 onward.
The part metering unit is not compatible with the older CP3 pumps used on MC11 engines. Always verify your high pressure oil pump model before ordering. For a complete high pressure oil pump replacement, both the pump assembly and the metering unit should be replaced together.
The part requires no routine service, but the metering unit is a wear item that can fail due to contaminated fuel. Use only clean, high quality diesel fuel and replace the fuel filter regularly.
If the engine exhibits power loss, rough idle, or a rail pressure fault code, The part metering unit should be tested. A failing high pressure oil pump metering unit may show erratic resistance values (normally 8 15 ohms). Do not attempt to disassemble or repair The part metering unit; it must be replaced as a complete unit. Always use genuine HOWO parts for any high pressure oil pump repairs.
If the engine has low power and black smoke, The part metering unit may be stuck partially open, causing excess rail pressure. If the engine cranks but does not start, The part metering unit may be stuck closed.
A failed high pressure oil pump metering unit can often be diagnosed by unplugging the electrical connector; if the engine runs (with the pressure limiting valve open), The part metering unit is likely faulty. If the rail pressure sensor reports values that do not follow the expected pattern, The part may have an internal leak. Always use a genuine HOWO high pressure oil pump metering unit for replacement.
Aftermarket high pressure oil pump metering units are often made from lower quality materials and may have incorrect coil resistance or flow characteristics. The O rings in copy kits may swell in diesel fuel, causing leaks. The electrical connector may not fit the harness correctly.
Genuine HOWO high pressure oil pump components are manufactured to the exact specifications of the original MC13 engine, using certified materials and factory calibration. The small additional cost of a genuine high pressure oil pump metering unit is far outweighed by the safety and reliability of a properly functioning common rail system.
The part metering unit is shipped in a sealed poly bag inside a cardboard box. The packaging is recyclable. The manufacturing facility is ISO 14001 certified. No hazardous substances are used in production. The part metering unit is protected by a plastic cap over the inlet ports; do not remove until installation.
This part metering unit can be ordered using the material encoding 202V11103-0007. Each order includes one part metering unit with pre installed O rings. Authorized HOWO dealers in Nigeria stock these genuine high pressure oil pump parts. For fleet orders of ten or more units, volume discounts are available. Always provide your engine serial number to confirm compatibility with your part.
Fleet managers who have installed this genuine HOWO part metering unit report restored engine power and elimination of rail pressure fault codes. The precise flow control has improved fuel economy. Many operators have standardized on this genuine part component for all MC13 engine fuel system repairs, citing the plug and play fitment and the reliability of genuine parts.
The part metering unit is shipped in a box measuring 10cm x 8cm x 5cm, weight 0.2 kg. Store the part metering unit in a dry indoor area. Do not remove the protective caps until installation. The shelf life is three years when stored properly. Protect the part metering unit from impact that could damage the internal valve components.
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