- Before removing hoses or lines, thoroughly clean the connections and the surrounding area.
- Before disconnecting hoses or lines, have suitable plugs or caps ready to plug the holes in the pipe or hose fitting immediately after disconnection.
- Always install plugs and caps on pipes and connections immediately after disconnecting them.
- Clean the removed hoses or pipelines from the outside and blow through with compressed air inside.
WARNING: Adequate eye protection must be worn.
- Inspect the pipeline carefully. Pay attention to the presence of cracks, detachment of the cord, the reliability of the termination of the tips. All hoses that are damaged must not be reinstalled.
- Check pipelines for corrosion and friction wear; replace if necessary.
CAUTION: If lines show signs of friction wear, align clamps, attachment points, etc. to prevent future failure.
- When installing hoses, make sure hoses are free of kinks, knots, kinks, and do not pass through areas where they would be subject to friction.
- When securing pipes, make sure they are routed and clamped so that they do not come into contact with potential sources of friction.
- Always replace the sealing washers installed on type bolts "banjo", plugs, etc.
- Always use two wrenches when tightening connections. Do not overtighten connection nuts and bolts "banjo".
- After any work on hydraulic systems, check for leaks. To do this, one person must be under the car and carefully inspect the joints, and the other, while driving the car, must strongly press the brake pedal.
Engine Power Hoses
All fuel hoses have two layers: an outer layer of reinforced rubber and an inner layer of special rubber (viton). When removing any fuel hose, carefully inspect its inner layer. Viton material should not have delaminations from the outer sheath.
WARNING: Never attempt to repair leaking fuel hoses and quick couplings individually: they must be replaced as an assembly.
Connecting clamps of hoses of the power supply system of the engine
The screw head of these clamps has a special slot, the edges of which, when the set tightening torque is reached, are crushed, not allowing the tightening force to be increased more than the set limit. Such clamps can be untwisted with an ordinary screwdriver. When reassembling, these clamps must be replaced with new clamps with automatic torque adjustment. The clamps must be tightened until part of the slot is chipped. Such clamps should not be tightened in any other way, nor should clamps of a different type be installed.
Engine cooling hoses
CAUTION: Follow the instructions below to avoid damaging the coolant hoses and their fittings.
Mutual position of the hose and pipe
To avoid damage from contact with adjacent parts or fatigue failure of the hose, connect the hose to the connector correctly.
If the hose and fitting are marked with pairing, then they should only be connected in this position. During installation, the hose must be completely pushed onto the connecting pipe. Usually there is a special shaped tide on the nozzle, which allows you to correctly assemble the connection.
Clamps
Usually there are marks on the hose that indicate the correct position of the clamp. If there are no marks, then the clamp should be located directly behind the shoulder at the end of the connecting pipe. The flare of the worm-drive clamp must be directed towards the near end of the hose, otherwise the hose may be pinched between the clamp and the flange of the nozzle. Unless otherwise specified, worm-drive clamps should be tightened to 3 Nm. After tightening the clamp, make sure that the clamp does not interfere with adjacent parts.
Clamps type "Oetiker" removed by bending the tongue (in the figure is indicated by an arrow) and release the free end of the clamp. Clamps of this type are not subject to further use. When installing a new clamp, ensure the correct position of the clamp on the hose, when tightening the clamp, align the tongue with the longitudinal slot on the outer branch of the clamp (the figure is shown by the arrow).
Parts overheating protection
All provided thermal and protective screens must be installed and in working order. If damage to these elements is noticeable, they must be replaced. Pay attention to the installation of hoses adjacent to very hot engine parts, such as the exhaust manifold and pipes of the exhaust gas recirculation system (EGR). When heated, the hoses will deform. This must be taken into account when laying and securing hoses.
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