Matching axle: Qingte QT300S dual-link rear axle (rear dual drive double axle)
Matching wheel bolts: QT300S2-3104006A rear wheel hub bolts
Thread specification: Standard heavy-duty coarse-thread heavy-duty thread for heavy-duty trucks
Installation position: Drive wheels of the rear axle (shared locking nuts for the inner and outer tires)
Net weight per piece: Approximately 0.38kg
Locking wheel assembly
Tighten onto the rear axle hub bolts, compress the hub and the inner and outer double steel rings, fix the driving tire, and bear the heavy load of the entire vehicle, braking impact, and bumpy loads;
Flange pressure dispersion
Widen the flange surface to evenly distribute the locking force on the hub contact surface, preventing excessive local stress from causing the hub to crack or the bolts to slip;
Anti-loosening assistance
When assembling, tighten according to the standard torque. Combined with the self-locking thread of the bolts, the vehicle is less likely to loosen by itself during long-distance driving, avoiding major safety hazards of tire detachment.
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Torque for tightening: Standard tightening torque is 450–500 N·m. It should be tightened diagonally in two separate stages. Do not lock it tightly all at once.
Preparation before assembly: Apply high-temperature lubricating grease evenly on the threads to prevent rusting after long-term use.
Replacement standard: If the hub bolts are slipped or the nut flange is deformed / the threads are damaged, the entire set must be replaced synchronously. Do not mix new and old parts separately.
Recheck cycle: The torque of all wheel hub nuts should be rechecked every 20,000 kilometers. In mountainous areas with heavy loads, the inspection interval can be shortened to 10,000 kilometers.
QT300S0-3104070: Special for dual-axle rear wheels, with thickened flange for high load-bearing capacity;
QT300S1-3104060: Single rear axle / front wheel nuts, the flange size and thread length are not interchangeable and cannot be used as a substitute.
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