Installation and Use of Inner Tubes for Engineering Tires

The installation and use of inner tubes for OTR tires must strictly follow the norms. The core is to ensure sealing, avoid damage, extend service life and guarantee safety.

I. Installation Steps for Inner tubes of OTR Tires (Key Specifications)

1.Pre-installation inspection: Thoroughly clean the rim (free of burrs, rust, and foreign objects), and inspect the inner tube (free of damage, sand holes, and aging), valve stems (free of air leakage and intact sealing rings), and outer tire rims (free of deformation and cracks).

2. Inner tube pre-installation: Slowly inflate the inner tube to a "swollen but not tight" state (to facilitate the fit with the outer tube), avoiding overinflation that may cause stretching damage. Then, smoothly insert the inner tube into the outer tire, ensuring that the valve stems are aligned with the valve holes of the outer tire, and that the inner tube is not twisted or folded.

3. Rim assembly: First, insert one side of the outer tire's rim into the rim. Then, use a special tool (such as a tire crowbar to prevent sharp tools from scratching the inner tube) to slowly press the other side of the rim into the rim. During the process, observe the inner tube to prevent it from being squeezed and damaged by the rim or the edge of the rim.

4. Inflation and calibration: Before inflation, make sure the valve stems are vertical and not skewed. Inflate slowly until the rims are fully in contact with the rims (hear a "click" sound), then pause to check the airtightness. Inflate the tire again according to the specified pressure of the OTR tire (refer to the marking on the side of the outer tire, do not overinflate or underinflate). After inflation, rotate the tire to ensure that the inner tube does not shift.

II. Precautions for the Use of inner tubes in OTR tires

Air pressure control: Check the inner tube air pressure before daily use and inflate strictly according to the air pressure marked on the outer tire (underpressure can easily cause the inner tube to wrinkle, wear and burst; overpressure will reduce the cushioning effect and increase the risk of impact damage).

Avoid foreign objects and damage: The driving road surface should be cleared of sharp stones, metal fragments, etc., to prevent the outer tire from puncturing and damaging the inner tube. Overloading is prohibited (overloading will significantly increase the load on the inner tube and accelerate its aging and rupture).

Regular inspection: Check the sealing of the inner tube valve stem every week (apply soapy water to observe if there are bubbles), and whether the inner tube is bulging or leaking. If any damage is found, it should be replaced in time (do not use ordinary patches for repair, but use special repair materials for engineering tires).

Storage requirements: When not in use for a long time, the inner tube pressure should be completely drained. It should be stored separately in a cool, dry and oil-free environment, avoiding direct sunlight or contact with acidic or alkaline substances to prevent aging.