199112340001 HOWO Wheel Hub Reduction Gear Cover

199112340001 is a dedicated wheel hub reduction gear cover exclusively designed for SINOTRUK HOWO series heavy-duty trucks, serving as the core protective and sealing component of the vehicle wheel hub reduction mechanism. It is mounted on the outer end of the wheel hub reducer, integrating three core functions: protection, sealing and dustproof, effectively isolating the hub reduction gear, bearing, half-shaft and other internal precision components from external impurities.

Engineered for commercial vehicle harsh working conditions, it adopts high-strength structural design and enhanced sealing technology, preventing sand, dust, mud, rainwater and road splash from entering the hub reducer, avoiding component wear, corrosion and oil leakage. It ensures the stable operation of the hub reduction mechanism, reduces friction loss, extends the service life of the hub assembly, and adapts to long-haul transportation, construction sites, mines, mountain roads and other complex working scenarios of HOWO series heavy-duty trucks (tractors, dump trucks, cargo trucks).

Applicable Vehicles: SINOTRUK HOWO series (HOWO T7H, TX, TH7, A7, W5G); fully compatible with HOWO standard hub reduction axle (single/double rear axle models).

Adaptable Systems: Original factory wheel hub reduction mechanism, perfectly matching HOWO hub reducer assembly, wheel hub bearing, half-shaft and hub oil seal.

OE Reference Number: 199112340001

Interchangeability: Direct bolt-on replacement. The mounting hole position, inner diameter, flange size and sealing groove are 100% identical to the OE part. No need to modify the wheel hub, reducer or axle housing, and the replacement can be completed quickly with standard tools.

Value-added Service: Support vehicle VIN code-based configuration verification to distinguish between single rear axle and double rear axle versions; provide matching suggestions for hub oil seal (matching OE: 199112340002) and mounting bolt specifications.

Main Dimensions: Overall outer diameter 380±3mm, inner diameter 220±2mm, flange thickness 25±1mm; mounting hole quantity: 8 pcs, mounting hole center circle diameter 320±0.5mm; sealing groove width 8±0.2mm, depth 5±0.1mm.

Material Specification: Cover body: High-strength cast iron (HT250, wear-resistant, impact-resistant); Sealing ring: Nitrile rubber (NBR, oil-resistant, aging-resistant); Mounting bolts: 8.8-grade high-strength carbon steel (zinc-plated anti-corrosion).

Operating Temperature Range: -40℃ ~ +120℃ (resists extreme cold in northern regions and high temperature generated by hub reducer operation).

Protection Grade: IP66 (dust-tight, waterproof against heavy rain, road splash and high-pressure water washing, suitable for off-road and construction site environments).

Sealing Performance: Double sealing structure (oil seal + sealing ring), no oil leakage under 0.3MPa pressure test for 60min; no dust and water ingress after 100 hours of harsh environment test.

Mechanical Performance: Tensile strength ≥ 250MPa; Impact toughness ≥ 15J/cm²; Surface hardness HB 180-220 (wear-resistant, no deformation under impact).

Service Life: ≥ 8 years or 600,000 kilometers under normal operating conditions.

Core Materials: HT250 high-strength cast iron (cover body, high rigidity, impact-resistant, suitable for heavy-load pressure); NBR nitrile rubber (sealing ring, oil-resistant, adaptable to hub reducer lubricating oil); 8.8-grade high-strength carbon steel (mounting bolts, anti-loosening, anti-shear); 304 stainless steel (sealing gasket, anti-corrosion).

Surface Treatment: Cover body adopts electrophoretic coating + powder coating double anti-corrosion treatment (thickness 70-90μm, anti-rust, anti-scratch); Mounting bolts adopt hot-dip galvanizing (anti-corrosion, suitable for humid and salt spray environments); Sealing groove adopts precision machining + anti-rust treatment.

Production Process: Precision sand casting (cover body blank); CNC machining (mounting holes, inner diameter, sealing groove); Quenching and tempering (cover body reinforcement); Surface anti-corrosion treatment; Sealing performance test; Dimensional precision inspection; 100% air tightness and pressure test before leaving the factory.

Production Line Capacity: Equipped with automatic casting and CNC machining production lines, monthly output ≥ 10,000 pieces (single/double rear axle versions simultaneous production).

Quality Grade: OE-Matched High-Quality Part, fully compliant with SINOTRUK original factory technical standards and GB/T 9439 "Grey Iron Castings" national standard.

Inspection Items: Dimensional accuracy test (outer diameter, inner diameter, mounting hole position); Mechanical performance test (tensile strength, impact toughness); Sealing performance test (air tightness, oil leakage); Anti-corrosion salt spray test (≥ 1200 hours); Surface finish inspection; Flange flatness test.

Quality System: IATF 16949, ISO 9001 certified, strict implementation of incoming material inspection, process inspection and final product inspection; each product passes 4 rounds of quality testing to ensure no defective products leave the factory.

Batch Tracking: Each wheel hub reduction gear cover is laser-marked with OE number, batch number and production date on the flange surface; complete production and test records are retained for 3 years, supporting full batch traceability.

Average Service Life: ≥ 8 years or 600,000 kilometers under normal operating conditions (excluding consumable sealing rings).

Performance Improvement:

Enhanced Protection Performance: HT250 cast iron cover body has high rigidity and impact resistance, avoiding deformation and damage caused by road impact and heavy-load pressure.

Double Sealing Design: Integrates oil seal and NBR sealing ring, forming a dual protection barrier, effectively preventing hub reducer lubricating oil leakage and external impurities ingress.

Anti-Corrosion Enhancement: Double anti-corrosion surface treatment, adapting to coastal salt spray, northern cold and humid, and construction site dusty environments, no rust or corrosion after long-term use.

Harsh Environment Adaptation:

Low Temperature: Normal use at -40℃, no cast iron brittle fracture or sealing ring hardening;

Waterproof Dustproof: IP66 protection grade, withstands heavy rain, high-pressure car wash and road splash, no water and dust ingress into the hub reducer;

Impact Resistance: Resists road gravel impact and heavy-load vibration, no cover body deformation, cracking or bolt loosening;

Oil Resistance: Sealing ring resists hub reducer lubricating oil erosion, no aging, swelling or oil leakage.

Common Fault Improvement: Solves common OE aftermarket problems such as cover body deformation, cracking, rust corrosion, oil leakage (caused by sealing failure), dust ingress, and mounting hole wear.

Maintenance Value:

Time-Saving: Direct bolt-on replacement, no need to disassemble the entire hub assembly, one technician can complete replacement within 30 minutes;

Cost-Effective: Core protective component replacement avoids expensive maintenance costs caused by hub reducer internal component wear (e.g., gear, bearing damage);

Safety Guarantee: Ensures the stable operation of the hub reduction mechanism, prevents sudden failure of the hub assembly during driving, and improves vehicle operation safety.

Packaging Configuration: Individual EPE anti-collision foam wrapping (full coverage of cover body) + transparent plastic film (moisture-proof, dust-proof) + corrugated carton; flange surface and mounting holes are protected by separate plastic gaskets to avoid scratches; bulk orders are packed with partitioned cartons + wooden pallets (fixed with steel straps to prevent extrusion deformation).

Outer Carton Marking: OE No. 199112340001, Product Name (HOWO Wheel Hub Reduction Gear Cover), Applicable Models (SINOTRUK HOWO T7H/TX/TH7), Quantity, Gross Weight/Net Weight, Protection Grade (IP66), Anti-Collision and Moisture-Proof Warning Signs.

Product Marking: Laser engraving on the flange surface includes OE Number, Material (HT250), Batch Number and Production Date; the inner sealing groove is marked with size specifications for easy matching with oil seals; mounting holes are marked with positioning marks for quick installation.

Customization Service: Support neutral packaging or customized branding; can provide enhanced thickened versions (for mine dump trucks) and anti-corrosion enhanced versions (for coastal areas) to meet special user needs.

Inventory Status: In-stock supply for SINOTRUK HOWO series mainstream models (single/double rear axle versions); matching hub oil seal (199112340002) and mounting bolts are also in stock.

Minimum Order Quantity (MOQ): 1 piece for sample testing; 40 pieces for bulk order (single/double rear axle mixed order acceptable).

Delivery Cycle:

Stock: 1-3 working days;

Bulk Order: 7-10 working days;

Customized Thickened Version: 10-15 working days.

Supply Stability: Long-term stable supply of core materials (HT250 cast iron, NBR rubber); strategic safety stock is maintained to cope with urgent orders from SINOTRUK service stations and dealers.

Certification Qualifications: IATF16949, ISO9001; compliant with GB/T 9439 national standard; can provide third-party mechanical performance, sealing performance and anti-corrosion test reports.

Quality Guarantee Policy: 24-Month Warranty (excluding consumable sealing rings and bolts); free replacement for non-human damages such as cover body deformation, cracking, rust corrosion, and inherent sealing failure.

Technical Support: 24-hour online technical response, providing installation guidance, torque specifications, and fault diagnosis solutions (e.g., oil leakage after installation, cover body deformation); offer training on hub reducer maintenance and sealing replacement.

Return and Exchange Policy: 7-day no-questions-asked return for unused products in original packaging; defective products are replaced with freight prepaid by the seller, ensuring minimal impact on vehicle operation.

Case 1: Northern China Mine AreaApplication: HOWO TH7 dump trucks operating in Shanxi coal mines (dusty, heavy-load, frequent impact).Result: The thickened HT250 cast iron cover body resists gravel impact and heavy-load pressure, no deformation or cracking; double sealing structure prevents coal dust and muddy water from entering the hub reducer, avoiding gear and bearing wear; service life exceeds 650,000 kilometers, reducing maintenance frequency by 40%.

Case 2: Southern China Coastal AreaApplication: HOWO TX cargo trucks in Guangdong and Fujian (salt spray, humid environment).Result: Double anti-corrosion surface treatment and galvanized bolts effectively resist salt spray corrosion; no cover body rust or bolt corrosion after 5 years of use; IP66 waterproof performance prevents seawater splash from entering, ensuring the hub reducer runs stably without oil leakage.

Case 3: Northwest Long-Haul TransportationApplication: HOWO T7H tractors operating in Gansu and Xinjiang (large temperature difference, sandy environment).Result: The cover body adapts to extreme temperature differences (-35℃~85℃), no brittle fracture or sealing failure; the sealed structure prevents sand and dust from entering, reducing friction loss of the hub reducer; stable operation ensures smooth long-haul driving, and the service life is 30% longer than the industry average.

Installation:

Clean the flange surface of the hub reducer and the new cover body, remove oil, debris and rust to ensure the sealing ring fits tightly;

Install the new sealing ring into the sealing groove (apply a small amount of lubricating oil to the sealing ring to prevent deformation);

Align the cover body with the mounting holes (follow the positioning marks), install the 8.8-grade mounting bolts, and tighten them in diagonal order with the specified torque (80-90N·m);

After installation, check the cover body for looseness and oil leakage, and test the vehicle for a short distance to ensure normal operation.

Inspection: Regularly check the cover body for deformation, cracking and rust, and the mounting bolts for looseness every 30,000 kilometers; clean the cover body surface regularly to remove dust and mud; check the hub reducer oil level regularly to avoid oil leakage caused by excessive oil.

Storage: Store in a dry, ventilated warehouse with relative humidity ≤ 75%, avoid contact with water, oil and corrosive substances; place horizontally on wooden pallets to avoid cover body deformation; the flange surface and mounting holes should be protected to prevent scratches and rust.

Replacement: Replace with the same OE model (199112340001); it is recommended to replace the sealing ring and mounting bolts at the same time to ensure sealing performance and mounting firmness; after replacement, check the hub reducer for abnormal noise and oil leakage to ensure stable operation.

Q1: How to confirm that this wheel hub reduction gear cover matches my HOWO truck?

A1: Please provide your vehicle model (e.g., HOWO T7H) or VIN code, and we will verify the compatibility of the cover's outer diameter, inner diameter, mounting hole quantity/position and flange size with your hub reducer to ensure perfect fit.

Q2: Why does the hub reducer leak oil after replacing the new cover?

A2: Please check three points: 1. Whether the sealing ring/oil seal is correctly installed (not reversed or deformed); 2. Whether the mounting bolts are tightened in diagonal order (torque 80-90N·m); 3. Whether the cover body flange surface is clean (no oil, debris affecting sealing). If all are correct, it may be a defective cover body, please contact us for replacement.

Q3: What are the signs that the wheel hub reduction gear cover needs to be replaced?

A3: ① Cover body deformation, cracking or severe rust; ② Oil leakage at the flange connection (after replacing the oil seal still leaks); ③ Mounting holes are worn (bolts loose and cannot be tightened); ④ Dust and mud enter the hub reducer (causing abnormal noise of the reducer).

Q4: Can samples be provided for installation and performance testing?

A4: Yes, sample supply is supported. The sample fee can be fully deducted from the subsequent formal order, and the sample delivery cycle is 2-3 working days; matching oil seal and bolt samples can also be provided if needed.

Hot Tags: 199112340001 howo wheel hub reduction gear cover, China 199112340001 howo wheel hub reduction gear cover manufacturers, suppliers, factory, AZ9100413007 Front Axle, Heavy Duty Front Axle, AZ9114930093, AZ9114930093 Towing Device HOWO, howo driving system, howo Front Axle