Under the influence of high temperatures inside the engine compartment, rubber and plastic hoses gradually harden and destroy, ensuring the operation of various engine components. You should periodically check the condition of the hoses, the presence of cracks and hardening, loose connections, leaks. The procedure for checking the cooling system hoses is described above.
Part of the hoses are attached with clamps. Check the tightness of the clamps, as loosening the fastening leads to a leak. In those places where clamps are not provided, check the reliability of the hose seal on the fittings, loss of elasticity in such connections due to swelling or hardening of the hoses is not allowed, otherwise the tightness of the connection is violated.
Vacuum hoses
1. Vacuum hoses can be distinguished by their color, or by the colored strips glued to them. Vacuum hoses with different wall thicknesses, atmospheric compression resistance and heat resistance are used for different engine systems. When replacing, make sure that the new vacuum hoses exactly match the ones being replaced. 2. Often the hose can only be checked after it has been removed from the vehicle. If several hoses are removed, first mark the mating fittings and hoses so as not to disturb their relative position later.
3. When checking the condition of the vacuum hoses, at the same time inspect the plastic tees. Check for cracks on them, as well as deformation of the hose at the point of contact with the tee fitting, which may be the cause of a leak.
4. To check for leaks, listen through a piece of hose with an internal diameter of about 6 mm, attaching the hose to the place to be checked. characteristic "hiss" indicates a leak.
Fuel hoses
1. Check the condition of the rubber fuel hoses for damage. 2. When replacing the fuel line on injection engines, the new line must exactly match the one used in the fuel system of engines of this type.
3. Always use screw clamps when replacing hoses.
Metal tubes
1. Metal pipes are commonly used in the fuel system. Check for twisted sections and small incipient cracks on the tubes.
2. When replacing, only seamless steel tubes should be installed. Tubes made of copper or aluminum are not suitable, as they cannot withstand vibration loads.
3. Check the condition of the metal pipes and fittings of the hydraulic brake system at the junctions with the main brake cylinder and the dispenser. The basis for a thorough check is any evidence of fluid loss from the hydraulic drive.