Nazhihui
1 / 3
| Model | 7DS200K |
| Brand | Fast |
| Number of Gears | 7 forward gears + 1 reverse gear |
| Shifting Mode | Manual |
| Maximum Input Torque | 2000 N·m |
| Core Application | Mining trucks (LGMG, Weichai) |
These shaft assemblies are engineered to Shaanxi Fast Gear’s original specifications, exclusively for the Fast 7DS200K 7-speed manual transmission. Built for heavy-duty scenarios like mining, construction, and heavy haulage, they deliver reliable performance and seamless compatibility as verified in practical applications.
Constructed from high-strength alloy steel, all assemblies undergo precision forging, heat treatment, and gear hobbing-grinding processes to meet the transmission’s officially rated 2000N·m max input torque and 2600rpm rated speed. Strict quality inspections ensure full compliance with OEM standards.
Left Countershaft Assembly: Adopts modular hot-fitting gear-matching technology and full helical tooth design with optimized tooth root arc, reinforced by shot peening to enhance load-bearing capacity.
Right Countershaft Assembly: Identical in structure, working with the left countershaft to achieve balanced torque distribution, reducing gear stress.
Second Shaft Assembly: Integrates floating gear design to offset installation errors, improve transmission smoothness, and reduce radial force.
1. Left Countershaft Assembly
| No. | Parts No. | Part Name | Qty. |
|---|---|---|---|
| 1 | 7DS180-1701056 | Countershaft Drive Gear | 1 |
| 2 | 12JS280T-1701058 | Sleeve | 1 |
| 3 | 7DS180-1701054 | Countershaft 6th Gear | 1 |
| 4 | 7DS180A-1701053 | Countershaft 5th Gear | 1 |
| 5 | 7DS200K-1701052 | Countershaft 4th Gear | 1 |
| 6 | 7DS200K-1701048 | Countershaft | 1 |
2. Right Countershaft Assembly
3. Output Shaft Assembly
