DAF CF65, CF75, CF85 Series . Manual — part 486

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3-3

Inspection and adjustment

XE ENGINE, ENGINE BRAKE

CF65/75/85 series

4

10

Mechanical inspection of DEB

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When the engine is run without the

valve covers, hot lubricating oil may

escape from the engine. Make sure

you are adequately protected.

}

When the engine or parts thereof are

opened, it is possible for dirt to

penetrate which can result in serious

damage to the engine. Therefore, the

engine should be cleaned

thoroughly before any parts are

opened.

Note:

If the DEB was removed, the DEB must first be

switched on and off several times with the engine

running to bleed the DEB and fill it with lubricating

oil.

1.

Remove the valve covers.

2.

Start the engine and run it at idling speed.

Note:

When the DEB is mechanically switched on,

the fuel injection is not switched off. Each

DEB should therefore be activated for as

brief a period of time as possible.

3.

Use a small screwdriver to push the pin in the

centre of the solenoid valve downwards. The

DEB has now been activated mechanically.

4.

Visually check whether the main and

operating pistons of the DEB move and/or

the exhaust valve is opened.

5.

When the DEB is switched off, check

whether lubricating oil is discharged from the

control valves.

6.

Fit the valve covers.

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XE ENGINE, ENGINE BRAKE

3-4

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Inspection and adjustment

10

CF65/75/85 series

4

3.3 INSPECTION AND ADJUSTMENT, EXHAUST BRAKE

Checking exhaust brake
1.

Use air pressure to check the exhaust brake

(4) for smooth operation.

This can be done by electrically activating

the exhaust brake valve (2) or by

pressurising the exhaust brake cylinder (1)

yourself.

Setting the exhaust brake
1.

Release the ball head of the butterfly valve

control lever.

2.

Open the butterfly valve fully (exhaust brake

inactive), indicated by the mark (1) on the

butterfly valve shaft.

3.

Set the length of the piston rod (2), making

sure that without air pressure a pre-load of 1

to 2 mm is present.

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4-1

Removal and installation

XE ENGINE, ENGINE BRAKE

CF65/75/85 series

4

10

4. REMOVAL AND INSTALLATION

4.1 REMOVAL AND INSTALLATION, DEB

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Make sure that the spring plate (5)

under the main piston (4) is not

damaged or deformed. When the

DEB is in operation, this spring

plate, if it is damaged or deformed,

can break off and result in serious

damage to the engine.

}

When the engine or parts thereof are

opened, it is possible for dirt to

penetrate which can result in serious

damage to the engine. Therefore, the

engine should be cleaned

thoroughly before any parts are

opened.

Removing the DEB
1.

Remove the valve cover.

2.

Disconnect the electrical connection and

remove the cable harness from its housing.

3.

Remove the DEB.

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XE ENGINE, ENGINE BRAKE

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Removal and installation

10

CF65/75/85 series

4

Installing the DEB
1.

Tighten the rocker seat attachment bolts to

the specified torque. See "Technical data".

Note:

There are two different DEB housings, one

for cylinders 1 to 3 and one for cylinders 4 to

6 (shown as "front" and "rear" on the DEB

housing).

2.

Place the DEB on the rocker seats.

3.

Insert the DEB attachment bolts and tighten

them to the specified torque. See "Technical

data".

4.

Attach the electrical connection.

5.

Adjust the valve clearance. See "Inspection

and adjustment".

6.

Adjust the DEB clearance. See "Inspection

and adjustment".

7.

Fit the valve cover.

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