7 семестр (Бормотов А) / 1man_bw_l23_30_chn_23_30_instruktsiya_po_ekspluatatsii / MAN-BW L23-30 (ЧН 225_300)+ / MAN-BW L23-30 H Vol-1 (Instruction)+

General

Before Cleaning

The cleaning process is only to be carried out when the engine is at operating temperature (see Operating Data 500.30) and when it is loaded as close as possible to full load (see Main Data 500.00).

See also "Cleaning the Turbocharger in Service, Water Washing of Compressor", 512.05.

Cleaning Procedure

1)Run the engine with as high a load as possible.

2)Discharge the excesspressure in the container by drawing out the spindle in the safety valve (see fig.

1)before loosening the top cover.

The spindle returns automatically by means of a builtin spring.

3) Fill the container with 2 litres fresh water (see the scale on the container).

Warning: Do not use sea water or cooling water.

4)Mount the top cover on the container.

5)Blow air into the container by means of a blow gun, until an operation pressure of 3 bar is reached

(see fig 2).

The safety valve will open at a pressure of 4 bar.

Excesspressure will discharge through the safety valve.

08028-0D/H5250/94.08.12

6)Connect the plug-in coupling of the lance to the snap coupling on the pipe (see fig 3).

7)Depress the handle on the hand valve until the water is completely injected into the compressor (approx. 30 seconds).

The water will enter the compressor in atomized condition, impinge the vanes of the compressor wheel with high velocity and thus wash off the dirt deposited.

8) Release the plug-in coupling and vent the container by drawing the spindle out of the safety valve.

After Cleaning

9)Run the engine for minimum 10 minutes at unaltered high load.

10)Compare the measurements of the operating data (see fig 4) before and after the cleaning procedure (see Operating Data 500.30).

08028-0D/H5250/94.08.12

08028-0D/H5250/94.08.12

Safety precautions:

Stopped engine

Shut-off starting air

Shut-off cooling water

Shut-off fuel oil

Shut-off cooling oil

Stopped lub. oil circul.

Description:

Water washing of compressor side. Turbocharger cleaning with engine in service.

Starting position:

Related procedure:

Special tools:

Hand injector.

Hand tools:

Ring and open end spanner, 17 mm.

Replacement and wearing parts:

See the special instructions for turbocharger.

5, 6L23/30H

Cleaning Procedure.

The cleaning process is only to be carried out, when the engine is at operating temperature and when it is loaded as close as possible to full load.

The engine must not be shut off immediately after cleaning but should be allowed to operate continuously for some time to ensure drying out of the charge air system.

Sequence of Operations.

1)Run the engine with as high a load as possible.

2)Unscrew the plug, see fig 1, together with the seal ring from air filter silencer.

3)Fill the hand injector with clean fresh water and insert it through the screw plug opening.

4)Inject the complete content of the hand injector within a period of 4 - 10 sec.

5)Run the engine for about 10 minutes at unaltered high load.

6)Make comparative measurements of the operating data. This comparison will indicate the success or lack of same of the washing procedure.

If necessary, carry out the washing once more.

Compressor cleaning by inspection of water with a hand injector is sufficient if a normal degree of fouling is present.

In case of serve dirt being deposited in the compressor, dismantling of the compressor, is necessary.

Components for mechanical and manual cleaning are necessary.

For manual cleaning of compressor, see special instruction.

For water washing of compressor side, see also description for water washing.

Seal ring

Screw plug

Hand injector

Fig 1.

08028-0D/H5250/94.08.12

Safety precautions:

Stopped engine

Shut-off starting air

Shut-off cooling water

Shut-off fuel oil

Shut-off cooling oil

Stopped lub. oil circul.

Description:

Water washing of compressor side. Turbocharger cleaning with engine in service.

Starting position:

Related procedure:

Special tools:

Hand tools:

Replacement and wearing parts:

See the special instructions for turbocharger.

7, 8L23/30H

Cleaning Procedure.

The cleaning process is only to be carried out, when the engine is at operating temperature and when it is loaded as close as possible to full load.

The engine must not be shut off immediately after cleaning but should be allowed to operate continuously for some time to ensure drying out of the charge air system.

Sequence of Operations.

1)Run the engine with as high a load as possible.

2)Remove the filling plug (6), see fig 1 on the dosage container (5) and fill the container with water. Screw on the filling plug.

3)Activate the push buttom of the manoeuvring valve (3) for approx. 20 sec.

Air from the compressor outlet casing will now be supplied via the pipe connection (2) to the dosage container, and will force the water through the hose (7) to the injection tube (8).

The water will enter the compressor in atomized condition, impinge the vanes of the compressor wheel with high velocity and thus wash of the dirt deposited.

4)Run the engine for about 10 minutes at unaltered high load.

5)Make comparative measurement of the operating data.

This comparison will indicate the success or lack of same of the washing procedure.

If necessary, carry out the washing once more, but with 10 minutes interval from the initial washing.

Compressor cleaning by injection of water is sufficient if a normal degree of fouling is present.

In case of severe dirt being deposited in the compressor, dismantling of the compressor components for manual cleaning is necessary.

For manual cleaning of compressor side , see special instruction.

For water washing of compressor side, see also description for water washing.

8

Fig 1. Arrangement for water washing.

08028-0D/H5250/94.08.12

08028-0D/H5250/94.08.12

Safety precautions:

Stopped engine

Shut-off starting air

Shut-off cooling water

Shut-off fuel oil

Shut-off cooling oil

Stopped lub. oil circul.

Description:

Water washing of turbine side, cleaning with engine in service.

Starting position:

Related procedure:

Special tools:

Hand tools:

Replacement and wearing parts:

See the special instruction for turbocharger.

L23/30H

Cleaning Procedure.

1)Adjust the engine load to approx. 20 % and let the engine stabilize for 10 min.

2)Open the drain cock at the turbocharger outlet and check for free passage, see fig 1.

3-way cock

Plate with cleaning instruction

Manoeuvering valve

Regulating valve

Cleaning water inlet

Drain cock

Fig 1. Arrangement for water washing.

3)Turn the 3-way cock to position 2 "Open", see fig. 2 and check for free passage. If ok turn to the water wash position 3 "Wash".

4)Connect the water supply to the water wash system.

5)Activate the manoeuvring valve, see fig 1.

Then open the regulating valve and adjust the water flow until the drain flow is approx. 0,25 l/min.

6)Continue the water washing 5 - 10 min. or until the drain water is free of particles.

7)Release the manoeuvring valve and disconnect the water supply.

Turn the 3-way cock to position 1, "Closed" and check that the water drain flow has stopped.

8)Continue at this load at least 5 min. before increasing the load to the normal condition.

9)After the water washing, the engine should run for at least 1 hour before stop.

Note: The regulating valve has to be opened slowly.

The manoeuvring valve must not be locked in open position.

The water injection time mentioned in item 6 must be not exceeded.

For water washing of turbine side, see also description for water washing.

Fig 2. 3-way cock.

08028-0D/H5250/94.08.12

Plate

Page 1 (2)