The part is a critical device for HOWO MAX 4X2 tractors operating in cold climates. This Electrical heater fuel coarse filter of electric pump actively heats diesel fuel to prevent wax crystallization, ensuring reliable engine starts even at -25°C. As part of genuine HOWO Parts, this Electrical heater fuel coarse filter of electric pump also removes large contaminants and separates water. Below is the detailed description of the key component included.
Fuel coarse filter – This primary filter element is the core of The part. It captures rust, dirt, and other solid particles down to 30 microns with 98% efficiency. The fuel coarse filter also includes a water separator bowl that allows visual inspection of accumulated water. When used inside The part, the fuel coarse filter ensures that only clean, warm fuel reaches the high-pressure injection pump. The filter media is made of high-grade cellulose blended with synthetic fibers, offering high dirt-holding capacity and long service intervals (up to 50,000 km in normal conditions). The fuel coarse filter should be replaced whenever the service light illuminates or at every second oil change to maintain the performance of The part.
Electrical heater fuel coarse filter of electric pump – Genuine HOWO part for MAX 4X2
The part contains a self-regulating PTC ceramic heater that activates when fuel temperature drops below 4°C. This prevents wax gelling and ensures The part delivers fluid diesel even in arctic conditions.
This Electrical heater fuel coarse filter of electric pump removes more than 95% of free water from diesel fuel. The transparent water bowl allows visual inspection, and a drain valve makes servicing The part quick and clean.
The part includes a manual priming plunger on the filter head. After replacing the fuel coarse filter, the priming pump easily purges air from the system, restarting the engine without bleeding.
The housing of The part is made of corrosion resistant aluminum with an epoxy coating. It withstands engine vibration, road salt, and pressure spikes up to 10 bar, ensuring long service life.
The part is mounted between the fuel tank and the electric lift pump. It contains a thermostatically controlled PTC heater that draws 12V/24V power and consumes up to 180W only when needed. The heater quickly raises the temperature of the diesel fuel inside the filter bowl to around 15°C, preventing wax crystal formation that would block the filter media.
The fuel coarse filter element inside The part is a pleated cellulose/synthetic blend with a nominal rating of 30 microns. It captures rust, dirt, and other solid contaminants. Simultaneously, a coalescing water separator captures water droplets that settle at the bottom of the transparent bowl. A water in fuel sensor can be installed (optional) to warn the driver when drainage is needed.
When the engine is running, fuel flows from the tank into The part, passes through the heated zone, then through the filter media, and finally exits toward the electric pump. The integrated manual priming pump allows the technician to refill The part after element replacement without using external tools.
Before installing The part, ensure the engine is cold and the fuel system pressure is released. Disconnect the battery negative terminal. Remove the old filter assembly and clean the mounting bracket. Apply a thin layer of clean diesel to the new O ring of the fuel coarse filter element. Screw the element onto the filter head until it contacts the seal, then tighten an additional 3/4 turn.
Connect the fuel inlet and outlet hoses according to the markings on The part (inlet from tank, outlet to pump). Secure the electrical connector for the heater (polarity not critical for PTC). Reconnect the battery. Prime the system by pumping the manual plunger on The part until resistance is felt. Start the engine and check for leaks. The heater will activate automatically when the fuel temperature is low.
The fuel coarse filter element inside The part should be replaced every 40,000 to 50,000 km or annually, whichever comes first. In dusty environments or when using bio diesel blends, replace more frequently. The water separator bowl should be checked weekly; if water accumulates above the MAX line, open the drain valve until clean fuel flows.
The PTC heater requires no maintenance, but the electrical connector should be inspected for corrosion at each filter change. If The part fails to heat, check the fuse (rated 15A for 12V systems, 10A for 24V). The heater element itself is not user serviceable; replace the entire filter head if the heater malfunctions. Always use genuine HOWO replacement parts to maintain the performance of The part.
If the engine stalls or has difficulty starting in cold weather despite the presence of The part, check that the heater is receiving power. Measure voltage at the heater terminals while the engine is running below 4°C. If voltage is present but no heat, the PTC element may have failed. Another symptom of a clogged fuel coarse filter is loss of power under load. Replace the element if the pressure differential exceeds 0.5 bar.
Water in fuel alarm (if equipped) indicates that the bowl of The part needs draining. Water ingress can also cause injector corrosion, so drain immediately. If the manual priming pump becomes hard to operate or fuel leaks from the plunger, the seal may be dry or cracked. Replace the pump cover assembly. Always use genuine parts to ensure correct fitment.
This Electrical heater fuel coarse filter of electric pump is specifically designed for SINOTRUK HOWO MAX 4X2 tractors equipped with MC11, MC13, or MT13 engines. It fits the standard fuel filter bracket (WG9725551389) and connects using M16x1.5 banjo fittings. The same assembly is also compatible with HOWO T7H, SITRAK C7H, and HOHAN N7G trucks. For older WD615 engines, a different filter adapter is required.
The part works with both electronic and mechanical injection systems as long as the electric lift pump is present. The heater current draw is low, and the device will not interfere with the ECU or other electronics. Always verify the material encoding (WG9925550990/1) on the original part before ordering.
Choosing a genuine Electrical heater fuel coarse filter of electric pump ensures that the PTC heater reaches the correct temperature curve and that the filter media has the exact pore size and dirt-holding capacity. Aftermarket copies often use inferior heating elements that overheat or fail prematurely, and their filter media may allow contaminants to pass, damaging injectors.
The genuine Electrical heater fuel coarse filter of electric pump also has a precision molded water bowl that does not crack under vibration or temperature swings. It comes with all necessary O rings and a warranty of 12 months. By investing in genuine HOWO parts, fleet operators reduce downtime and total ownership costs.
Q: Does The part require any programming? No, the heater is self regulating and only requires a 12V or 24V supply. The ECU does not control it directly.
Q: Can I use The part without the heating function? Yes, the heating element is optional; if you disconnect the power, it will function as a standard coarse filter, but cold starting will be compromised.
Q: How often should I change the fuel coarse filter element? Every 40,000–50,000 km or when the engine shows signs of fuel restriction. Always use a genuine element designed for The part.
Q: Is The part compatible with 100% biodiesel? Yes, the seal materials are compatible with B20 blends. For higher blends, consult the service manual.
Q: What is the warranty period? The genuine Electrical heater fuel coarse filter of electric pump carries a 12 month unlimited mileage warranty against manufacturing defects.
© 2026 HOWO Heavy Duty Parts — Genuine Electrical heater fuel coarse filter of electric pump for MAX 4X2 tractors. Complete with fuel coarse filter element, heater, and priming pump.
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