Product Introduction 4205740430 Axle Shaft Oil Seal is a precision rotary sealing component installed at the end of the rear axle housing on HFC1040 light truck. It closely hugs the outer surface of the axle shaft to trap gear lubricant inside the axle assembly and stop oil from leaking out onto brake drum and wheel parts. This aftermarket replacement seal resolves gradual lubricant loss, brake contamination and accelerated gear and bearing wear caused by lip hardening, spring failure and permanent deformation of the original seal. It protects the rear axle internal mechanism and maintains stable braking performance for township and urban small freight vehicles.

Product Advantages Constructed from modified nitrile rubber compound with excellent compatibility against gear lubricants. Reinforced garter spring keeps the sealing lip pressed tightly against the shaft under variable temperature. Rigid metal shell maintains press-fit shape inside the axle seat. Each oil seal undergoes leak and wear sampling inspection before shipment, precise inner diameter for coaxial fit and simple replacement during axle maintenance.

Applicable Models Fit for HFC1040 series light-duty trucks, commonly equipped with rear axle drum brake and half shaft structure for short haul cargo transport.

Q1: How does gear oil on brake lining affect drum brake function?
A1: Oil soaks the friction material, reduces friction force and may lead to sudden brake failure.
Q2: What surface condition of axle shaft will shorten the lifespan of new oil seal?
A1: Scratches or rough grooves on the shaft will continuously cut and wear the seal lip.
Q3: Is it necessary to check the breather valve when replacing axle shaft oil seal?
A3: Yes, blocked breather raises internal pressure and pushes oil past the seal lip easily.