The coarse filter and installation kit is designed to mount the primary fuel filter (water separator) on the HOWO MAX 4X2 chassis. A correct coarse filter and installation ensures that the engine receives clean, water free fuel, protecting the high pressure injection system. This genuine HOWO coarse filter and installation kit includes the front oil pipe bracket, the main oil pipe bracket, and all required flange bolts and nuts. When you choose authentic Howo Parts, you receive a complete coarse filter and installation assembly engineered specifically for the MAX 4X2 frame rail.
The oil pipe bracket (Front) is a stamped steel bracket that holds the front end of the coarse filter assembly. It is positioned near the engine front cover and provides a rigid mounting point for the fuel inlet line. The bracket has a curved surface that matches the filter housing and is finished with black e-coat to resist corrosion.
The hexagon bolt with flange M10 is a class 10.9 fastener used to secure the oil pipe bracket to the engine or chassis. Two bolts are supplied, each with an integrated flange that distributes the clamping force and eliminates the need for a separate washer. The bolts are zinc plated and include a pre-applied thread locking patch to prevent loosening.
The oil pipe bracket is the main mounting bracket for the coarse filter assembly. It is a heavier gauge steel component welded to a support plate. This bracket is bolted directly to the chassis side rail and supports the full weight of the filter and the fuel lines.
The hexagon nut with flange M10 is a flanged locking nut used with the M10 bolts on the coarse filter and installation brackets. Two nuts are supplied, each with a serrated flange that bites into the steel surface to create a positive lock against vibration.
The hexagon toothed nut with flange M12*1.25 is a fine pitch locking nut used for the larger bracket attachment points. Four nuts are included, each with a toothed flange that provides high resistance to loosening under engine vibration. The fine thread allows precise torque control.
The hex flange nut with teeth M14*1.5 is a large fine pitch nut used on the main chassis mounting bolts. Four nuts are supplied, each with a hardened tooth pattern that digs into the bracket surface. They are used together with the serrated flange bolts to create a vibration proof joint.
The hex bolt with serrated flange M14*1.5 is a heavy duty, fine thread bolt used to attach the coarse filter and installation brackets to the main chassis rail. Four bolts are included, each with a serrated flange that acts as an integrated lock washer. The bolts are grade 10.9 and are zinc flake coated for maximum corrosion resistance.
Coarse filter and installation – genuine HOWO fuel pre-filtration mounting kit
| Material Encoding | Name |
|---|---|
| YG9525550133 – Oil pipe bracket (Front) | |
| ZQ1841025 – Hexagon bolt with flange M10 | |
| YG9525550114 – Oil pipe bracket | |
| ZQ32010T13F6 – Hexagon nut with flange M10 | |
| ZQ32512T13F6 – Hexagon toothed nut with flange M12*1.25 | |
| ZQ32514T13F6 – Hex flange nut with teeth M14*1.5 | |
| ZQ1811435TF6 – Hex bolt with serrated flange M14*1.5 | |
This coarse filter and installation kit includes not only the two custom stamped brackets (front and main) but also every bolt and nut needed for installation. The M10, M12 and M14 fasteners are all specifically matched to the threaded holes on the HOWO MAX 4X2 chassis.
The serrated flange bolts and toothed flange nuts create a mechanical lock that resists loosening even under the high vibration levels of a diesel engine. This ensures the coarse filter and installation remains firmly attached for the life of the vehicle.
All brackets are e-coated or powder coated, and all fasteners are zinc plated or zinc flake coated. This coarse filter and installation kit can withstand road salts, humidity, and fuel spills without rusting or seizing.
The brackets are laser cut and jig welded to match the exact contours of the HOWO MAX 4X2 frame rail. The bolt holes align perfectly with the factory threaded bosses, eliminating the need for drilling or modifications.
The coarse filter (primary fuel filter / water separator) is the first line of defense against contaminated fuel. A loose or poorly mounted coarse filter can vibrate, leading to cracked housings, fuel leaks, and air ingress into the fuel system.
This can cause hard starting, loss of power, and even injector failure. The coarse filter and installation kit provides a rigid, vibration damped mount that keeps the filter secure under all operating conditions. The two brackets (front and main) distribute the weight of the filter and the fuel lines across two points on the chassis, preventing cantilever stress that could crack a single bracket.
The oil pipe bracket (Front) and the oil pipe bracket are made from hot rolled steel plate, 4mm thick, and formed on a CNC press brake.
The brackets are then welded with fillet welds on both sides for maximum strength. After welding, the assemblies are shot blasted to remove scale and then coated with a black cathodic e coat that provides 500 hours of salt spray resistance. The hexagon bolts with flange M10 are class 10.9 and include a nylon patch thread locker. The M12 and M14 fine pitch fasteners are grade 10.9 as well, with zinc flake coating that provides 720 hours of corrosion protection. Every fastener is tested for hardness and thread conformity before packaging.
Before starting, drain the fuel system and disconnect the battery. Remove the old coarse filter assembly if present. Clean the chassis mounting area. Position the oil pipe bracket (Front) on the engine front bracket and loosely install the two M10 flange bolts with the M10 flange nuts. Then position the main oil pipe bracket on the chassis rail, aligning the holes with the threaded bosses.
Insert the four M14 serrated flange bolts through the bracket and into the chassis, and hand tighten the four M14 toothed flange nuts. Next, attach the coarse filter housing to the brackets using the supplied hardware (not included in this kit; use the filter manufacturer’s bolts). Once all bolts are started, torque the M10 bolts to 35 Nm, the M12 nuts to 50 Nm (if any), and the M14 bolts to 80 Nm. Do not overtighten. Reconnect the fuel lines and prime the system before starting the engine. Check for leaks.
This coarse filter and installation kit is designed for the HOWO MAX 4X2 with MC07, MC11, or MC13 engines that use a remote mounted primary fuel filter. It fits all chassis from 2018 onward. The brackets are not compatible with the integrated filter head mounted directly on the engine block. For older HOWO 70 series trucks, the chassis rail hole pattern is different; this kit will require adapter plates. Always verify your vehicle’s configuration before ordering.
Inspect the coarse filter and installation every 50,000 km. Check the brackets for cracks, especially around the weld lines. Verify that all bolts are still tight; retorque any loose fasteners to the specified values. Look for signs of rust on the brackets or fasteners; touch up with anti corrosion paint if needed. The rubber isolators between the brackets and the filter housing (if present) should be checked for cracking and replaced if deteriorated. A secure coarse filter installation is essential for preventing fuel system contamination.
If the coarse filter assembly vibrates excessively, check that all bolts are tightened to the correct torque. If the filter housing has cracked, the brackets may be overloaded; ensure that the front bracket is also supporting the filter and not just the main bracket.
If there is corrosion on the fasteners, they may have been replaced with non genuine hardware that lacked proper plating. If a bolt will not tighten, the chassis threaded insert may be stripped; repair with a thread insert kit. Always use genuine HOWO coarse filter and installation components for replacements, as generic brackets often have incorrect hole spacing.
Aftermarket brackets are often made from thinner steel that flexes and eventually cracks. The bolts may be a lower grade (8.8 instead of 10.9) and may not have the required thread locking patch.
The zinc plating on generic fasteners is often only a thin cosmetic layer that rusts within months. Genuine HOWO coarse filter and installation components use the correct material thickness, proper heat treatment, and industrial grade corrosion protection. The small price difference is insignificant compared to the cost of a fuel system failure caused by a broken bracket or a loose filter that allows air into the fuel lines.
The coarse filter and installation kit is packaged in a cardboard box with dividers to separate the brackets from the fasteners. The box is made from recycled content and is fully recyclable. The e-coat process is water based and free of heavy metals. The manufacturing facility is ISO 14001 certified.
The complete coarse filter and installation kit includes all seven line items listed in the parameters table. Individual components can be ordered separately using their material encodings. Authorized HOWO dealers in Nigeria stock these genuine parts. For fleet orders of ten or more kits, volume discounts are available. Always provide your vehicle’s VIN to confirm compatibility.
Fleet managers who have installed this genuine HOWO coarse filter and installation kit report a significant reduction in fuel system related breakdowns. The secure mounting has eliminated the loose filter rattling that was common with worn original brackets.
The serrated flange bolts have stayed tight even after two years of service. Many operators have adopted this kit as their standard replacement part for any fuel filter bracket replacement, citing the complete hardware set as a major time saver.
The kit is shipped in a sturdy cardboard box measuring 40cm x 30cm x 15cm, weight 3 kg. Store the box in a dry indoor area. Do not stack heavy items on top. The shelf life is indefinite when stored properly.
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