NEWS CENTER

Brake hoses are not replaced on a calendar. Two hoses leave the factory identical and age at different rates, depending on where the vehicle lives and how it works. A garage-kept car and a truck running the coast will not wear out the same hose on the same schedule. Three signals decide it: the condition of the cover, the test history versus the road history, and the duty cycle of the vehicle.

The cover is the first thing to go

Ozone attacks the rubber surface, and the first cracks appear on the outside of the bend, small at first, then they spread across the cover. Salt spray and UV make the process faster. That is why the cover compound is a real specification, not a detail. EPDM is chosen for ozone resistance, and our assemblies use an ozone-resistant EPDM outer cover rated for -48°C to +120°C. When a hose shows surface cracks, the cover has started to fail. It still holds pressure today. It will not hold it forever.

The test report proves the factory state, not the road state

Every assembly we ship is pressure-tested before it leaves, and the low-expansion line is 100% pressure-tested to a minimum 80 MPa burst. Every batch ships with a test report covering burst, low temperature, and ozone. That report proves the hose was sound at the factory gate. It does not prove the hose is sound on the truck. Burst pressure is a manufacturing check, not an inspection substitute. No factory test covers what the road does to a hose: twisting against its natural shape, rubbing on a frame rail, baking under the hood. If the routing is wrong, the hose is a replacement candidate no matter what its test history says.

Age and duty cycle

Vehicle age sets the inspection trigger, not the replacement date. An old hose gets a close look even when it looks fine, because rubber ages whether it is driven or not. For fleets, the schedule is the discipline. Operators running fixed routes in a known climate can set replacement intervals by mileage and duty cycle, then stick to them. The hose is a wear item. A fleet that schedules replacements by mileage and duty cycle does not have to guess.

A quick check before you decide

• Look at the cover for cracks, chafing, or hard spots.
• Look at the fittings for corrosion where the collar meets the tube, and for a collar that rotates freely on the hose.
• Look at the routing for contact with sharp edges or twist against the natural lay of the hose.

Any of those means replace. A clean cover and clean routing mean the hose can stay until the next check.

Need assemblies with the test report attached and the cover material stated on the spec? We test 100% of our brake hose assemblies before shipment and share the reports. See our standard brake hose assemblies and low expansion brake hose assemblies, or send us your operating climate and service schedule for a recommendation.