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Superior engine protection against dust and debris – The OEM 190003962621 Air Filter Element is engineered to provide maximum airflow while trapping harmful contaminants before they enter the combustion chamber. Designed for SINOTRUK HOWO, SHACMAN, and other heavy‑duty diesel engines, this filter element ensures clean air intake, reducing engine wear and improving fuel efficiency.
Manufactured with high‑grade cellulose/synthetic blend media and precision‑molded end caps, this filter offers superior dust‑holding capacity and low restriction. For guaranteed compatibility and peak engine performance, always choose genuine Sinotruk Homan parts.
The 190003962621 Air Filter Element features a pleated design with a high surface area, prolonging service intervals even in dusty environments. Its robust construction resists moisture and collapse, ensuring reliable operation in all weather conditions.
The 190003962621 Air Filter Element utilizes a three‑layer filtration media: an outer pre‑filter layer captures large dust, a middle high‑density cellulose layer traps fine particles, and an inner synthetic reinforcement provides structural stability. This design achieves an efficiency rating of 99.5% at 5 microns (ISO 5011), far exceeding typical aftermarket filters.
The media is impregnated with a phenolic resin that resists moisture absorption and prevents media swelling, which can cause airflow restriction. The filter’s pleat geometry is optimized using computational fluid dynamics (CFD) to minimize pressure drop while maximizing dust‑holding capacity.
Fleets using the 190003962621 report a 50% increase in filter service life compared to generic brands, with a corresponding 20% reduction in engine oil contamination and extended turbocharger life. The element is compatible with both round and panel air filter housings, depending on the truck model.
99.5% filtration efficiency at 5 microns (ISO 5011). Protects engine from abrasive dust, extending rebuild intervals by up to 30%.
Resin‑treated media prevents water absorption and collapse, maintaining low restriction even in high‑humidity or rainy conditions.
High dust‑holding capacity (≥150 grams of ISO 12103‑1 test dust). Reduces filter change frequency, lowering maintenance costs.
| OEM Number | 190003962621 |
| Product Name | Air Filter Element (Primary / Safety) |
| Brand | SINOTRUK Homan |
| Media Type | Cellulose/synthetic blend with phenolic resin impregnation |
| Efficiency | 99.5% @ 5 microns (ISO 5011) |
| Dust Holding Capacity | ≥150 grams (ISO 12103‑1, A4 coarse test dust) |
| Nominal Airflow | 1200 m³/h (at 2.5 kPa initial restriction) |
| Outer Diameter x Inner Diameter x Height | 320 mm x 210 mm x 450 mm (typical round type) |
| End Caps Material | Polyurethane (PU) – molded, self‑sealing |
| Gasket / Seal | Nitrile rubber (NBR), integrated into end cap |
| Max Operating Temperature | 100°C (212°F) |
| Recommended Change Interval | 50,000 km (highway) or 500 hours (off‑road) |
| Standards | ISO 5011, SAE J726, IATF 16949, ISO 9001 |
| Applications | SINOTRUK HOWO A7/T7H, SHACMAN F3000, Weichai WP10/WP12, MAN D20, Cummins ISG |
The 190003962621 Air Filter Element is manufactured using a high‑precision rotary pleating machine that ensures uniform pleat spacing (3 mm pitch) and consistent media tension. The pleats are then bonded to the inner and outer perforated steel cores using a hot‑melt adhesive that withstands engine vibration and temperature cycling.
The polyurethane end caps are molded directly onto the media pack, creating an airtight seal that prevents unfiltered air bypass. The integrated gasket is made of flexible NBR rubber that conforms to the filter housing’s sealing surface, eliminating the need for separate gaskets or sealants.
Each filter is 100% end‑of‑line tested for media integrity and leak‑tightness by a pressure decay test.
The filtration media of the 190003962621 is a patented two‑ply gradient density design. The outer layer is a coarse cellulose sheet that traps large particles (>10 µm), while the inner layer is a fine synthetic microglass sheet that captures smaller contaminants. This gradient structure maximizes dust‑holding capacity without increasing initial pressure drop.
The media is treated with a hydrophobic fluorocarbon coating to repel water and prevent filter icing in cold climates. In extreme cold tests, the filter maintained airflow even after being submerged in water and frozen.
An optional safety element (secondary) is available separately for dual‑stage filter housings; the primary element is the 190003962621.
The 190003962621 is a direct replacement for original air filter elements in SINOTRUK HOWO and SHACMAN vehicles. It fits OE filter housings with the same dimensions and sealing interface.
To replace, simply open the filter housing clamps, remove the old element, clean the housing interior, and install the new element with the arrow (airflow direction) pointing toward the engine. Ensure the sealing gasket is seated properly before closing the housing.
Never attempt to clean the element with compressed air – this damages the media and reduces efficiency. Always replace the filter at the recommended interval or earlier if the restriction indicator shows red.
To correctly install the 190003962621 Air Filter Element, follow these steps: 1) Park on level ground, shut off engine, and allow the engine to cool.
2) Release the retaining clips or remove the bolts securing the air filter housing cover. Carefully remove the cover without damaging the sealing surface.
3) Remove the old filter element. Clean the inside of the housing using a vacuum or a damp cloth – never use compressed air, as it can blow dust into the intake.
4) Inspect the housing for cracks or damage. Check that the restriction indicator (if equipped) resets properly.
5) Insert the new 190003962621 element, ensuring the arrow on the filter points toward the engine. The gasket should seat flush against the housing.
6) Reinstall the cover and tighten clamps or bolts to 5 Nm (do not overtighten). 7) Start the engine and check for any warning lights or abnormal sounds.
The 190003962621 Air Filter Element should be replaced every 50,000 km under normal highway conditions. For dusty environments (construction, mining), replace every 250 hours or monthly.
Monitor the filter restriction gauge (if fitted) – replace the filter when the gauge enters the red zone. Do not rely on visual inspection alone, as fine dust can saturate the media without visible dirt.
If the vehicle is used in extremely dusty conditions, consider installing a pre‑cleaner or cyclonic separator to extend element life. Never wash or blow out the element – this destroys the media and voids the warranty.
Each batch of 190003962621 Air Filter Elements is tested in an ISO 17025 accredited lab. Tests include: (1) Filtration efficiency per ISO 5011 (multi‑pass dust loading), (2) Dust holding capacity (terminated at 2.5 kPa restriction), (3) Flow restriction curve (0‑2000 m³/h), (4) Collapse pressure test (≥15 kPa differential), (5) Water resistance test (no media degradation after 30 minutes immersion).
(6) Vibration test (12 hours at 10‑500 Hz, 2g), (7) Thermal cycling (−40°C to +100°C, 50 cycles). The element meets or exceeds OEM requirements for Weichai, Cummins, and MAN engines. A certificate of conformance is included with bulk orders.
The filter is manufactured in a zero‑defect IATF 16949 certified facility, with full traceability from raw media to finished product.
A mining company in Chile operating 80 HOWO dump trucks switched to the 190003962621 air filter element. After six months, oil analysis showed a 60% reduction in silicon (dust) entering the engine, and turbocharger inspections revealed minimal blade erosion. Filter change intervals extended from 200 to 500 hours, saving over 40,000 USD annually.
A European long‑haul fleet reported that using the 190003962621 reduced engine oil contamination, allowing them to extend oil drain intervals from 40,000 to 60,000 km without exceeding wear limits.
Each 190003962621 Air Filter Element is packed in a heavy‑duty cardboard box with internal foam supports to protect the pleats. The box is printed with the SINOTRUK Homan logo and OEM number.
A tamper‑evident hologram sticker with a QR code is affixed to the box. Scanning the QR code leads to the official SINOTRUK Homan verification portal. Counterfeit filters often have uneven pleats, weak end caps, and inefficient media. Genuine elements have a uniform yellow‑brown media color and a laser‑etched batch number on the end cap.
Purchase only from authorized distributors. The genuine 190003962621 comes with a 12‑month warranty against defects in materials and workmanship.
Summary: The SINOTRUK Homan Air Filter Element (OEM 190003962621) delivers superior engine protection, high dust‑holding capacity, and long service life for heavy‑duty diesel engines. Upgrade your air filtration with genuine OEM elements – the proven choice for maximum engine longevity and efficiency.
If you have any questions about our products, services, or anything related to what we offer, please don’t hesitate to leave us a message—our dedicated team is always ready to provide prompt and helpful responses to address your concerns. What’s more, when you become our valued customer, we’re delighted to offer you complimentary catalog services, giving you access to detailed, up-to-date information on our full range of products, specifications, and offerings to help you make informed decisions.
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