DAF CF65, CF75, CF85 Series . Manual — part 249

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Inspection and adjustment

XE ENGINE

CF65/75/85 series

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3.8 INSPECTION, ENGINE COMPRESSION PRESSURE

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Be careful when working on an

engine at operating temperature.

Hot lubricating oil may escape from

the engine when it is run without the

valve covers. Make sure you are

adequately protected.

A compression measurement is a quick check of

the sealing of the valves and the head gasket,

and of the sealing between the cylinder liner and

the piston rings.

The results of the measurements can only be

used to compare the cylinders with each other.

1.

Bring the engine up to operating

temperature.

2.

Remove the engine management system

supply fuse or supply relay, so that the pump

units cannot be activated.

3.

Remove the valve covers. See "Removal

and installation".

4.

Remove the injectors.

5.

Turn the engine a number of times using the

starter motor, so that any carbon or dirt

particles in the cylinder are removed.

6.

Fit the dummy injector (DAF no. 1329306),

compression gauge (DAF no. 1329301) and

adapter (DAF no. 0694972).

7.

Carry out the measurement by rotating the

engine using the starter motor, until the

gauge reading no longer rises. For the

pressure differences permitted between

individual cylinders see "Technical data".

8.

Remove the dummy injector and fit the

injectors.

9.

Fit the valve covers. See "Removal and

installation".

10. Fit the fuse or relay.

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Inspection and adjustment

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CF65/75/85 series

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4-1

Removal and installation

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CF65/75/85 series

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4. REMOVAL AND INSTALLATION

4.1 REMOVAL AND INSTALLATION, ENGINE

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Suspend the engine securely from

the hoist, using approved lifting

gear.

Various fluids will be released when

fluid pipes are removed.

Collect these fluids. Personal safety

and the risk of fire should always be

considered.

Note:

Because of the large number of vehicle

specifications, it is not feasible to exactly specify

the engine removal and installation procedures

for every vehicle.

This description only includes the most important

points requiring attention.

-

Disconnect the earth lead from the battery

terminal.

-

Avoid opening fluid systems as much as

possible. If possible, remove and set aside

the engine components.

-

When removing the engine, ensure that no

parts or dirt fall into the engine, radiator or

other components. Therefore, plug all

openings that are freed.

-

Wiring harnesses are vulnerable. If

damaged, they may cause failures. Make

sure these wiring harnesses are stress-free

and clear of moving parts.

-

Fit all attachment bolts and tighten them to

the correct torque.

-

The engine should not be allowed to rest on

the oil sump. Because the oil sump is made

of sheet material, it will be severely damaged

by the engine's weight.

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Removal and installation

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CF65/75/85 series

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4.2 REMOVAL AND INSTALLATION, ENGINE MOUNTS

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Suspend the engine securely from

the hoist, using approved lifting

gear.

Note:

If the engine is lifted slightly it is not necessary to

disconnect coolant hoses, air inlet hoses and

torque rods between the engine and the radiator.

Removing the engine mounts
1.

Disconnect the earth lead from the battery

terminal.

2.

Suspend the engine securely in the hoist.

3.

Remove the central engine mount fixing

bolts at the front and/or rear of the engine.

4.

Remove the engine mounts.

Installing the engine mounts
1.

Fit the engine mounts.

2.

Tighten the engine mount attachment bolts

to the specified torque. See "Technical data".

3.

Connect the battery earth lead.