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Genuine SINOTRUK 1st-2nd Gear Shift Fork Shaft Assembly AZ2203220010 – Heavy Duty Transmission Component for HOWO Truck

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Sinotruk Howo Gearbox

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Genuine SINOTRUK 1st-2nd Gear Shift Fork Shaft Assembly AZ2203220010 – Heavy Duty Transmission Component for HOWO Truck

Technical Description‌:

Key Specifications

  • OEM Number‌: AZ2203220010 (Direct replacement part)
  • Material‌: 40Cr alloy steel with induction hardening
  • Surface Hardness‌: HRC 52-58 | ‌Core Hardness‌: HRC 28-35
  • Precision Tolerance‌: ±0.02mm (ISO 2768-f)

Compatibility

  • Fits SINOTRUK HW19710/HW19712 transmissions
  • Matches HOWO A7/A5 series with 10-speed gearbox

Performance Features

  1. Durability‌: 300,000+ shift cycles under 250Nm torque
  2. Optimized Design‌: CNC-machined splines reduce gear clash
  3. Quality Assurance‌: 100% magnetic flux leakage testing

1. WE TREAT EVERY CUSTOMER AS OUR FRIEND, STICK TO THE PRINCIPLE: WIN-WIN AND MUTUAL BENEFIT ;
2. A VARIETY OF CHOICE FOR PRODUCTS: QUALITY, BRAND, PACKAGING;
3. WE WILL REPLY YOU FOR YOUR INQUIRY IN 24 HOURS.
4.Professional Perfomance SINOTRUCK parts supplier
5. WE WILL BE ON SERVICE 24/24 HOURS ON THE WORKING DAY.
6. ASS: WE WILL OFFER YOU THE BEST AFTER SALES SERVICE.

Tools & Materials Preparation

  • Required tools:
    • SINOTRUK special tool S399171ZF201 (shift fork installation tool)
    • 15mm/17mm dual-head torque wrench (50-180Nm range)
    • Dial indicator with magnetic base (0.01mm precision)
  • Consumables:
    • Molykote G-5002 assembly paste (50g tube)
    • 80W-90 GL-5 gear oil (15L minimum)

Step-by-Step Installation Process

1️⃣ ‌Disassembly Precautions

  • Drain transmission fluid completely through 24mm hex drain plug
  • Mark original shim positions with alignment punch (every 120°)
  • Remove circlips using dedicated pliers (non-reusable component)

2️⃣ ‌Shaft Assembly Installation

  • Apply assembly paste to splined surfaces (0.05-0.1mm thickness)
  • Align shift fork with synchro sleeve using guide pin ST-22A:
    • Red alignment mark → towards transmission front
  • Torque sequence:
    • M12 mounting bolts: 80Nm → 110Nm (cross pattern)
    • Locknut: 150Nm + 30° angle tightening

3️⃣ ‌Post-Installation Verification

Test Parameter Specification Measurement Method
Shift effort ≤35N (cold) Spring scale test
Axial play 0.08-0.15mm Dial indicator
Gear engagement <0.5s transition Road test

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