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Maximum engine cleanliness and extended oil drain intervals – The OEM 231-1105020 Oil Filter is a spin‑on full‑flow filter engineered to remove abrasive contaminants, soot, and sludge from engine oil in SINOTRUK HOWO, SHACMAN, and other heavy‑duty diesel engines. It ensures that only clean oil reaches bearings, turbochargers, and piston rings, dramatically reducing wear.
Manufactured with high‑efficiency multilayer media and a robust steel canister, this filter provides outstanding dirt‑holding capacity and burst strength. For guaranteed fitment and original‑quality performance, always choose genuine Sinotruk Homan parts.
The 231-1105020 Oil Filter features an integrated bypass valve, anti‑drainback valve, and a precision‑rolled thread, ensuring consistent filtration throughout the oil change interval. Its advanced media delivers 99% efficiency at 25 microns, protecting your engine from the most damaging particles.
The 231-1105020 Oil Filter uses a high‑density cellulose/synthetic blend media that achieves 99% filtration efficiency at 25 microns (ISO 4548‑12). Unlike standard filters that only capture larger particles, this element traps fine abrasive soot and wear metals that cause cylinder bore polishing and bearing fatigue. The result is extended engine life and consistent oil pressure.
The integrated bypass valve (set at 2.5 bar) ensures oil continues to flow even if the filter becomes clogged, preventing oil starvation. The anti‑drainback valve (silicone) stops oil from draining back into the sump when the engine is off, providing instant lubrication on cold starts. The canister is made from high‑strength steel that withstands up to 15 bar burst pressure.
Fleet managers using the 231-1105020 report a 40% reduction in engine wear metals (by oil analysis) and a 20% extension of oil drain intervals. The filter’s high dirt‑holding capacity (≥25 grams of ISO 12103‑1 test dust) means fewer changes and lower disposal costs.
99% efficiency at 25 microns. Captures soot, metal particles, and sludge, protecting critical engine components from abrasive wear.
Calibrated bypass valve prevents oil starvation; silicone anti‑drainback valve ensures instant lubrication at startup.
High dirt‑holding capacity (≥25g) and synthetic media extend oil change intervals, reducing maintenance costs.
| OEM Number | 231-1105020 |
| Product Name | Oil Filter (Spin‑On, Full‑Flow) |
| Brand | SINOTRUK Homan |
| Media Type | Cellulose/synthetic blend resin‑impregnated |
| Filtration Efficiency | 99% @ 25 microns (ISO 4548-12) |
| Dirt Holding Capacity | ≥25 grams (ISO 12103‑1 A4 coarse test dust) |
| Bypass Valve Cracking Pressure | 2.5 bar ±0.3 bar |
| Anti‑Drainback Valve | Silicone (oil‑resistant, high temp) |
| Thread Size | M20 x 1.5 (standard HOWO filter head) |
| Outer Diameter x Height | 95 mm x 140 mm |
| Canister Material | Cold‑rolled steel, powder‑coated |
| Burst Strength | ≥15 bar |
| Max Operating Temperature | 120°C (248°F) |
| Compliance | ISO 9001, IATF 16949, SAE J1858 |
| Applications | SINOTRUK HOWO A7/T7H, SHACMAN F3000, Weichai WP10/WP12, MAN D20 |
The 231-1105020 Oil Filter is assembled on a fully automated line that ensures consistent pleating, end‑cap bonding, and valve installation. The media pack is formed by micro‑pleating a continuous sheet of cellulose/synthetic material, creating a high surface area within a compact canister. The pleats are stabilized with an outer wire mesh and bonded to the end caps with a heat‑cured adhesive that withstands 150°C oil temperatures.
The anti‑drainback valve is a flexible silicone disc that seals against the filter outlet, preventing oil from draining back when the engine stops. The bypass valve is a spring‑loaded piston that opens at 2.5 bar differential, allowing oil to bypass the element if it becomes clogged. Both valves are tested on every production batch.
Each filter is 100% end‑of‑line tested for leak integrity (vacuum decay test) and bypass valve function. A sample from each batch is subjected to burst pressure testing (to 20 bar), fatigue cycling (100,000 pressure pulses), and multi‑pass filtration efficiency tests. Only filters meeting or exceeding OE specifications are released.
The media in the 231-1105020 features a gradient density design: larger pores on the outside capture big particles, and smaller pores on the inside trap fine contaminants. This increases dirt‑holding capacity while maintaining low flow restriction. The media is also impregnated with a phenolic resin that prevents fiber migration and adds wet strength.
Synthetic fibers are incorporated to improve performance with extended‑drain synthetic oils, which can be more aggressive to cellulose‑only media. The blend provides 50% higher burst resistance and 30% more dirt capacity than standard cellulose filters.
The filter also retains its efficiency even when exposed to high soot loading (typical of EGR engines), ensuring that sub‑micron particles are captured and do not cause oil thickening.
The 231-1105020 is a direct spin‑on replacement for the original oil filter on SINOTRUK HOWO (all models with Weichai MAN engines), SHACMAN F3000, and many other heavy trucks using the M20x1.5 thread.
To replace, warm the engine (to thin the oil), remove the old filter with a strap wrench, clean the mounting surface, lubricate the new filter’s rubber gasket with clean oil, and spin on until the gasket contacts the base, then tighten an additional 3/4 turn (or to 25 Nm).
Always use a genuine 231-1105020 to ensure correct bypass valve setting and filtration efficiency. After installation, run the engine, check for leaks, and verify oil pressure on the gauge.
Follow these steps for correct installation of the 231-1105020 Oil Filter: 1) Run the engine to operating temperature, then shut off and drain the engine oil.
2) Using a filter wrench, loosen the old filter and unscrew it. Dispose of the old filter responsibly.
3) Clean the filter mounting surface on the engine block. Remove any residual gasket material.
4) Apply a thin coat of clean engine oil to the rubber gasket of the new filter. This prevents tearing during installation.
5) Screw the new 231-1105020 filter onto the mount until the gasket contacts the base. Then tighten an additional 3/4 turn (approximately 25 Nm). Do not overtighten.
6) Refill the engine with the correct amount of oil. Start the engine and check for leaks around the filter gasket.
7) Stop the engine, wait a few minutes, and check the oil level; top up if necessary.
Replace the 231-1105020 Oil Filter at every oil change, typically every 50,000 km for highway use or 500 engine hours for off‑road. For severe dust or heavy‑load operation, reduce interval to 30,000 km.
If the oil pressure warning light flickers at idle after a cold start, the filter may be clogged or the bypass valve may be stuck. Replace the filter immediately. Never run an engine without a filter – unfiltered oil will destroy bearings in minutes.
Inspect the filter canister for dents or rust before installation; if damaged, discard and use a new one.
Each batch of 231-1105020 Oil Filters is tested in an ISO 17025 accredited laboratory. Tests include: (1) Multi‑pass filtration efficiency per ISO 4548‑12, (2) Dirt holding capacity, (3) Burst test to 20 bar, (4) Fatigue test (100,000 pressure cycles), (5) Bypass valve calibration, (6) Anti‑drainback valve leakage (≤5% loss over 24 hours).
(7) Thermal cycle test (−40°C to +120°C, 50 cycles), (8) Vibration test (10g, 24 hours). The filter meets or exceeds OEM specifications for Weichai, Cummins, and MAN engines. A certificate of conformance is available upon request.
The filter is manufactured in an IATF 16949 certified facility, with full traceability from raw media to finished product.
A South African mining company operating 80 HOWO dump trucks switched to the 231-1105020 oil filter. After 12 months, oil analysis showed a 45% reduction in silicon and iron particles, and engine tear‑downs revealed minimal bore polishing. Filter change intervals were extended from 250 to 400 hours without increasing wear metals.
A European logistics fleet reported that the 231-1105020 filter allowed them to safely extend oil changes from 40,000 to 60,000 km on synthetic oil, saving 30% on lubricant costs while maintaining engine cleanliness.
Each 231-1105020 Oil Filter is individually boxed in a heavy‑duty cardboard carton with a plastic cap to protect the threads. The filter is sealed in a plastic bag to prevent dust ingress.
A tamper‑evident hologram sticker with the SINOTRUK Homan logo and a QR code is affixed to the box. Scanning the QR code directs to the official authenticity verification portal. Counterfeit filters often have thin canisters, missing bypass valves, or poor media. Genuine filters have a powder‑coated finish, a laser‑etched batch number, and a solid feel.
Purchase only from authorized distributors. The genuine 231-1105020 comes with a 12‑month / 50,000 km warranty against defects.
Summary: The SINOTRUK Homan Oil Filter (OEM 231-1105020) delivers superior engine protection, high dirt‑holding capacity, and reliable bypass valve operation for heavy‑duty diesel engines. Upgrade your oil filtration with this genuine OEM spin‑on filter – the proven choice for long engine life and reduced maintenance.
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