
Part Number: WG2229040073
Standard Name: Spacing Plate for Main Shaft Gear / Main Shaft Keyway Gasket
Common Name in Industry: Transmission Steel Gasket, Main Shaft Positioning Ring, Keyway Limiting Gasket
System to which it belongs: Internal components of the main shaft assembly of Haoshi HW series manual transmission
Part attribute: Essential replacement part for major transmission overhaul, it is a gasket with dual functions of gap adjustment and axial positioning
Single-piece weight: Approximately 65g
Shape and Structure
Overall flat circular internal spline steel plate, outer ring is a smooth circular plane, inner ring is integrally formed by stamping with involute internal spline teeth. The number of spline teeth matches exactly with the external spline of the gearbox main shaft, allowing for synchronous rotation with the main shaft without slipping or idling.
Structure: A solid quenched steel plate without splicing or elasticity, belonging to a rigid fixed gasket (different from wave-shaped elastic gasket)
Thickness: Standard original factory fixed thickness (cannot be randomly stacked for substitution), used for precisely controlling the axial clearance of the gear
Surface treatment: Overall black quenching and rust prevention treatment, flat surface without warping, no burrs at the edges
Material standards (original factory parts)
Use 45# high-quality carbon structural steel, overall quenching and tempering treatment, hardness meets requirements:
wear-resistant, impact-resistant, does not deform under heavy load gear axial impact force;
resistant to long-term immersion in gearbox gear oil, not prone to rusting or thinning;
many third-party inferior brands often use ordinary cold-rolled thin plates, with insufficient hardness, prone to deformation and wear thinning under long-term heavy load.


Powerful Solutions For Business Growth
Prohibit re-use of old parts: Gaskets are wearables. After disassembly, they should be directly scrapped. There is a thickness difference between new and old gaskets due to wear, and re-use will result in abnormal clearance;
Before installation, clean the main shaft spline, gear mating surface debris, and oil sludge to ensure complete flat contact;
Align the spline with the outer teeth of the main shaft and push it in smoothly. Do not use hard tapping to cause the gasket to warp or deform;
After assembly, manually rotate the gear. If there is no obvious left-right clearance, it indicates normal clearance;
Multiple thin gaskets cannot be stacked to replace WG2229040073. Stacking will cause uneven force distribution and abnormal high-speed vibration and noise.


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