612630020038 Crankshaft Assembly HOWO

612630020038 is a dedicated crankshaft assembly for SINOTRUK HOWO heavy-duty trucks, paired exclusively with Weichai WP10/WP12 engines. As the engine's core power transmission part, it converts piston reciprocating motion into rotational motion, sending power to the gearbox, generator and other components to drive the vehicle. It bears huge alternating load, impact load and torque during operation, ensuring stable power output, uniform rotation and low vibration. Built for HOWO's long-haul, heavy-cargo and harsh work, it has excellent wear resistance, fatigue resistance and structural stability, avoiding crankshaft bending, journal wear, connecting rod pin damage and oil leakage to keep the engine running reliably.

①Applicable Vehicles: SINOTRUK HOWO heavy-duty trucks (long-distance trailers, dumpers, cargo trucks) with Weichai WP10/WP12 engines.

②Adaptable System: Matches HOWO's original cylinder block, connecting rod, bearing bush and oil supply system-no modifications to mounting size, journal diameter, bolt holes or connections.

③OE Reference Number: 612630020038

④Interchangeability: Follows original factory standards, size parameters and assembly requirements-direct replacement, no secondary machining or debugging.

⑤Value-added Service: Our technicians confirm fit via your HOWO model, WP10/WP12 engine and displacement, and provide pre-installation inspection and guidance.

Core Materials

The crankshaft body uses high-quality 42CrMo alloy steel, with excellent tensile strength, fatigue resistance and wear resistance, able to bear huge load and torque without bending, deformation or fracture. The matching bearing bush is high-strength alloy copper, with good lubricity and wear resistance, reducing journal friction and ensuring smooth rotation. Oil seals and fixing bolts are high-temp, corrosion-resistant, ensuring sealing and connection reliability.

Surface Treatment

The journal surface undergoes nitriding + precision grinding, improving hardness and wear resistance, reducing friction and extending service life. The crankshaft body has anti-rust phosphating + electrophoretic coating, resisting corrosion and rust for harsh, humid and dusty work environments. The bearing bush has anti-friction coating to enhance lubrication and avoid dry friction damage.

Production Craftsmanship

We use an integrated process: forging, heat treatment, CNC machining, dynamic balance detection, bearing bush assembly and leak test. Forging ensures a dense, defect-free crankshaft body with strong load capacity. Heat treatment (quenching + tempering) optimizes material structure and mechanical properties. CNC machining ensures accurate key dimensions for perfect HOWO engine fit. Dynamic balance prevents high-speed vibration and noise. Every unit passes strict inspection before shipping for stable performance and no oil leakage.

• Quality Grade: OE-matching standard, fully up to HOWO's technical demands and national crankshaft quality rules. It passed 3000-hour fatigue durability tests and 120000km actual vehicle runs, working reliably no matter the harsh conditions.
• Inspection Items: We check dimensions, coaxiality, surface hardness, dynamic balance, bearing bush fit, oil seal tightness and rotation smoothness thoroughly-no unqualified products are let out of the factory.
• Quality System: We hold IATF16949 and ISO9001 certifications, with full-process control from raw material purchase to finished product delivery, so every crankshaft maintains consistent quality.
• Batch Tracking: Each crankshaft has its OE number, batch number and production date laser-engraved. All production and inspection records are kept over 3 years, so every unit can be fully traced.

• Average Service Life: No less than 8 years (800000km), matching HOWO trucks with WP10/WP12 engines, helping users cut down on replacement and maintenance costs.
• Performance Advantages: It handles high torque well, transmits power steadily, runs at uniform speed with low vibration and noise; resists wear and fatigue even under long-term high loads; seals tightly with no oil leakage; high precision ensures perfect fit with other engine parts.
• Harsh Environment Adaptability: It works steadily between -40℃ and 250℃, fitting alpine areas, high-temperature regions, humid environments and dusty work sites. It resists corrosion and works well with all types of engine oil.

Common Fault Optimization

We optimized materials, heat treatment, surface treatment and bearing bushes to fix original crankshaft faults: bending (uneven load), journal wear (poor lubrication), connecting rod pin damage, oil leakage and abnormal vibration. This avoids power loss, abnormal noise and emission violations, cutting maintenance frequency and costs.

Maintenance & Replacement Value

Designed to original standards, it's easy to disassemble-professionals can replace it on-site with special tools, saving time and cost. Fully compatible with HOWO's engine parts, no extra debugging needed. Stable performance and long life reduce vehicle downtime and operating costs.

Packaging Configuration

Shockproof, anti-collision and anti-rust packaging: inner EVA foam, middle high-strength wooden frame, outer reinforced carton. The crankshaft is bracket-fixed to avoid transport damage. Journals are coated with anti-rust oil and wrapped in anti-rust paper. Matching accessories (bearing bushes, oil seals, bolts, instructions) are independently packaged.

Marking Specifications

Outer Carton: Printed with OE number, product name, HOWO model, WP10/WP12 engine, quantity, batch number, weight and warning signs. Export orders include multilingual instructions and qualification certificates.

Product Marking: Laser-engraved OE number, batch number, quality grade and WP10/WP12 fit on the crankshaft-wear-resistant and easy to identify.

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

①Inventory Status: We have enough 612630020038 stock to cover all applicable HOWO models and WP10/WP12 engine configurations. Urgent orders get spot delivery right away, so users can get their vehicles back on the road quickly.

②MOQ: Just 2 pieces-no pressure for small maintenance or retail orders; bulk orders (15 pieces and above) get tiered discounts; large custom orders can adjust production to meet your delivery deadline.

③Delivery Cycle: Spot orders ship within 24-48 hours; bulk orders take 7-10 days. For foreign trade, we offer one-stop customs clearance and let customers choose sea, air or express shipping as needed.

④Supply Stability: We have steady raw material suppliers and mature production lines (over 750 units monthly), ensuring long-term bulk supply with no delivery delays.

①Certification Qualifications: We're certified by IATF16949 and ISO9001, with products matching OE standards. Third-party test reports are available for import and export needs.

②Quality Guarantee: 36-month warranty. For non-human faults-like crankshaft bending, journal wear, oil leakage, connecting rod pin damage and abnormal vibration-we offer free return or exchange.

③Technical Support: Our team is online 24 hours a day, providing installation guidance, fault diagnosis and maintenance training based on your HOWO model and WP10/WP12 engine.

④Return Policy: We cover round-trip freight for returns due to product quality; products damaged in transit get free replacement, with no extra costs for you.

Q1: Is 612630020038 compatible with all HOWO vehicles?

A1: No, only those with Weichai WP10/WP12 engines. Provide your vehicle/engine model for accurate fit.

Q2: What to note during installation?

A2: Clean engine interfaces; install bearing bushes, apply engine oil to journals and bushes; install crankshaft, fasten bolts to torque/sequence; check rotation, assemble other parts, add oil, idle 3-5 minutes, check for leakage/noise before use.

Q3: Custom packaging/docs for foreign trade?

A3: Yes-neutral/LOGO packaging, multilingual instructions and full export docs (invoice, packing list, etc.).

Q4: Journal wear during warranty?

A4: Send fault photos, batch number and vehicle/engine model. We send a new crankshaft and cover all freight.

Installation Requirements

Disconnect power, remove original crankshaft and connected parts; clean cylinder block journals, bearing bush surfaces and oil passages; install new bearing bushes, apply engine oil; install 612630020038, fasten bolts to torque/sequence; check rotation, assemble other parts, add oil, idle 3-5 minutes, check for leakage/noise/vibration before normal use.

Regular Inspection

Check for oil/air leakage and abnormal vibration/noise every 40000km; maintain oil level/quality, replace oil and filter per cycle; check crankshaft end play and radial runout, replace if needed; avoid long-term overloading to prevent bending and damage.

Storage Requirements

Store in a dry, ventilated, dust-free warehouse away from high temps, humidity and corrosives; place horizontally; coat journals with anti-rust oil and wrap in anti-rust paper. Unopened shelf life: 12 months; reapply anti-rust oil after opening.

Replacement Tips

Replace immediately if there's power loss, abnormal vibration/noise, oil leakage, crankshaft bending or journal wear. Replace bearing bushes, oil seals and bolts together; idle 3-5 minutes after replacement for journal/bearing lubrication.

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