61557010008 Timing Gear Case

61557010008 is a dedicated timing gear case for SINOTRUK HOWO T7H, T5G, A7, TX and HOWO engineering vehicles with Weichai WP10/WP12 engines. As a core component of the engine timing system, it integrates protection, positioning and sealing, fixing timing gears, chains (or belts) and tensioners. It ensures accurate meshing of crankshaft and camshaft, maintains normal valve timing, and prevents impurities from entering. Designed for high-speed, heavy-load operation, it has good sealing, high rigidity and wear resistance, avoiding oil leakage, deformation and gear jamming to protect the timing system and engine stability.

①Applicable Vehicles: HOWO T7H/T5G/A7/TX and HOWO engineering vehicles, specifically those fitted with Weichai WP10 or WP12 engines.

②Adaptable System: Perfectly fits the original engine cylinder block, timing parts and tensioners-no need to modify the interface, mounting holes or sealing structure at all.

③OE Reference Number: 61557010008

④Interchangeability: Follows the original factory's size and specifications exactly, so it can directly replace the original timing gear case without any secondary machining or debugging work.

⑤Value-added Service: Our technicians will confirm the fit based on your vehicle model, engine model and timing system specs, and also provide pre-installation checks and sealing installation guidance.

Core Materials

Uses high-quality HT300 cast iron – high tensile strength, rigidity and wear resistance, withstanding engine impact and vibration without deformation or cracking. Sealing gasket is oil-resistant fluorine rubber, ensuring good sealing and no oil leakage. Fastening bolts are high-strength alloy steel, shear and tensile resistant for firm, non-loose connection.

Surface Treatment

Case surface is shot-blasted and sprayed with high-temperature anti-rust paint – strong adhesion and corrosion resistance, resisting engine high temperature, oil and dust. Mounting and sealing surfaces are precision milled, flat and tightly fitting with engine cylinder block and gasket for good sealing.

Production Craftsmanship

Adopts precision casting + CNC machining + heat treatment + surface spraying + sealing test. Precision casting ensures uniform structure without internal defects. CNC machining guarantees accurate dimensions and hole positions (tolerance ±0.08mm). Heat treatment enhances hardness and toughness. Each case passes pressure and sealing tests before delivery to ensure no oil leakage.

• Quality Grade: OE-matching, meeting HOWO standards and national heavy-duty engine component requirements. Passed 1,200-hour high-temperature durability and 800-hour sealing tests.
• Inspection Items: Sealing (pressure test), dimensional accuracy, material hardness, internal defect detection (X-ray), surface treatment, mounting hole accuracy and vibration resistance.
• Quality System: IATF16949 and ISO9001 certified, with full-process quality control from raw materials to finished products.
• Batch Tracking: Each case has laser-engraved OE number, batch number and production date. All records are kept for over 3 years for full traceability.

①Average Service Life: ≥5 years (500,000km), matching HOWO vehicles and WP10/WP12 engines, reducing replacement and maintenance costs.

②Performance Advantages: Excellent sealing (no oil leakage), high rigidity (no deformation/cracking), wear-resistant (long service life), good vibration resistance (protects timing system).

③Harsh Environment Adaptability: Works stably at -40℃~220℃, suitable for alpine, high-temperature, humid and dusty environments. Oil and corrosion resistant for harsh engine conditions.

Common Fault Optimization

Aiming at original case faults (oil leakage, deformation, cracking, sealing failure, mounting hole wear), we optimized materials, casting, surface treatment and sealing. It solves these issues, avoiding timing jamming, valve timing disorder and power loss, reducing maintenance.

Maintenance & Replacement Value

Easy to disassemble and assemble on-site with special tools, saving time. Fully compatible with original systems, no extra debugging needed. Stable performance and long service life reduce vehicle downtime and operating costs.

Packaging Configuration

Shockproof packaging: inner EVA foam, middle plastic cover, outer reinforced carton. Case is fixed with a positioning bracket to avoid collision. Sealing surface is wrapped with oil paper. Matching accessories (bolts, gaskets, sealant) are independently packaged.

Marking Specifications

Outer Carton: Printed with OE number, product name, vehicle/engine model, quantity, batch number, weight, and moisture-proof/shock-proof/fragile signs. Export orders include multilingual instructions.

Product Marking: Laser-engraved OE number, batch number and sealing grade on case – wear-resistant and easy to identify.

Customization Service: Neutral packaging and LOGO customization available. Carton printing, language and size adjustable by market needs.

①Inventory Status: We have ample stock of 61557010008, covering all applicable vehicle models and engines. For urgent orders, we can deliver from stock right away, no waiting required.

②MOQ: Minimum order is 2 pieces, no pressure for small maintenance orders; bulk orders (20 pieces and above) get tiered price discounts, the more you order, the better the price; for large customized orders, we can adjust the production cycle to match your delivery time.

③Delivery Cycle: Spot orders are shipped within 24-48 hours; bulk orders take 7-10 days to ship. For foreign trade orders, we provide one-stop customs clearance, complete export documents, and you can choose sea, air or express transport as needed.

④Supply Stability: We have stable raw material channels and mature production lines, with a monthly output of over 1,200 pieces, so there will be no delays in delivery even for long-term bulk supply.

①Certification Qualifications: Our factory holds both IATF16949 and ISO9001 quality certifications, and the product meets OE matching standards. For import and export needs, we can provide third-party test reports, including sealing performance, material performance and vibration resistance tests.

②Quality Guarantee: We offer a 30-month quality warranty. If there are non-human faults-like oil leakage, deformation, cracking, sealing failure or mounting hole wear-we provide free return and exchange service, replacing the product at no cost.

③Technical Support: Our professional technical team is online 24 hours a day. Based on your vehicle and engine parameters, we can guide you through installation, help diagnose faults and provide maintenance training.

④Return Policy: For returns caused by product quality issues, we bear the round-trip freight; if the product is damaged during transportation, we replace it for free, covering all related costs.

Q1: Is it compatible with all HOWO T7H/T5G/A7/TX models?

A1: Only compatible with WP10/WP12 engine models. Provide your vehicle and engine model for precise fit confirmation.

Q2: What are the key points of installation?

A2: Clean mounting surfaces; check case integrity and smooth sealing surface; install gasket and apply sealant; align holes, fasten bolts by specified torque; check sealing after installation.

Q3: Can foreign trade orders get customized packaging and documents?

A3: Yes. We offer neutral/LOGO packaging, multilingual manuals and full export customs clearance documents.

Q4: How to handle oil leakage during the warranty period?

A4: Send fault photos, batch number and vehicle/engine model to after-sales. We'll send a new product and bear all freight for quality issues.

Installation Requirements

Disconnect power and remove timing cover; check case integrity, smooth sealing surface and unobstructed holes; clean mounting surfaces; install gasket, apply sealant, align holes and fasten bolts; install timing components, adjust valve timing and test engine operation.

Regular Inspection

Check for oil leakage, deformation and cracking every 40,000km; retighten loose bolts; check sealing surface and replace gasket if damaged; replace case if mounting holes are excessively worn.

Storage Requirements

Store in dry, ventilated, dust-free warehouse; place horizontally to avoid deformation; wrap sealing surface with oil paper; 12-month unopened shelf life; apply anti-rust oil after opening before installation.

Replacement Tips

Replace immediately if there's oil leakage, engine abnormal noise, valve timing disorder or case deformation. Replace gasket and sealant together. Adjust valve timing and test engine after replacement.

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