Mercedes S-Class W-140

1991-1999 of release

Repair and car operation

Check of fuel system, replacement of the fuel filter

Gasoline is extremely inflammable therefore at work with any components of fuel system it is necessary to accept special precautionary measures.

Do not smoke, and do not come nearer to a venue of works with open fire or unprotected by the lamp shade carrying.

Do not perform such works in the garages equipped with heating devices, working at natural gas (such, as водогреи, dryers, etc.). The working platform should be ventilated well.

At gasoline hit on skin immediately wash away it water with soap.

At carrying out any works with fuel system put on goggles and hold near at hand the fire extinguisher. In case of a gasoline spillage immediately wipe a pool, but do not keep the rags impregnated with gasoline in places where it can самовоспламениться.

Check

If you felt a gasoline smell during movement or after the car stood on the sun, it is necessary to check a condition of all fuel system immediately.

PERFORMANCE ORDER

1. Uncover a fuel tank and check it on existence of damages and corrosion. The sealing insert on a cover should be whole. In case of existence of damages or corrosion replace a cover.
2. Survey inlet and returnable lines of fuel system on existence of cracks. Make sure that connections between lines of fuel system and system of injection of fuel, and also between lines of fuel system and the built-in fuel filter did not weaken.

On the cars equipped with system of injection of fuel before serving fuel hoses, it is necessary to dump pressure in system (see. The section of the Security measure and a rule of observance of purity at work with fuel system of Head of the Power supply system and release).

3. As some components of fuel system - for example, a fuel tank and some lines of fuel system - are in the lower part of the car, they are easier for examining, when the car is raised by the winch. If it is impossible, поддомкратьте the car and establish it on support.
4. On the raised car examine a fuel tank and a bulk mouth on existence of holes, cracks and other damages. Special attention give to a connection condition between a bulk mouth and a tank. Sometimes leakages of fuel occur owing to weakening of collars of fastening of a rubber mouth or because of damage of a material of a mouth. Examine all arms and tapes of fastening of a fuel tank to make sure that it is reliably strengthened on the car.

Never, under no circumstances, try to repair a fuel tank (excepting replacement of its rubber components). A flame of the welding device or any other opened fire easily can lead to explosion of evaporations of gasoline in a tank.

5. Carefully check all fuel hoses and the metal lines going from a tank on existence of weakened connections, twisting, signs of wear of materials of hoses and other damages. If necessary make repair or replace the damaged sections.

Replacement of the fuel filter

Petrol engines

Replacement of the fuel filter on petrol engines


51 — the Collar 52 — the Forcing tube 53 — the Returnable tube 55 — the Fuel filter	56 — the Tape from a foil 57 — a clamp 58 — the Bolt 62 — Sealing rings 69 — the Cover

PERFORMANCE ORDER

1. Open a cover of a fuel tank.
2. Disconnect returnable (53) and forcing (52) tubes.
3. Disconnect forcing tube (52) from the fuel filter.
4. Establish the new filter with a tape from a foil (56).
5. Get the engine and check absence of leakages of fuel.

OHM diesel engine 603

Remove the preliminary fuel filter. Establish it an arrow in the direction of a stream of fuel.

OHM diesel engine 606

Replacement of the fuel filter on the diesel engine 606


70/2 — the Fuel filter 74 — the Full bolt of shtutserny connection	74/1 — the otsechka Valve 76, 76/1 — Sealing rings

On some models the polnopotochny filter with a separator can be established instead of the fuel filter which differs lack of a drain stopper in the lower part of the filter.

Air removal from a power supply system of the diesel engine

If the engine stopped owing to a full oporozhneniye of a fuel tank, after filling it is necessary to remove air from a power supply system. For this purpose within no more than 60 seconds without interruption start the engine while it will not start to work steadily.