DAF 95XF. Manual - part 391

4

XF ENGINE FUEL SYSTEM

Inspection and adjustment

95

XF series

3-12

3.8

INSPECTION OF RACOR FILTER ELEMENT

1.

Check the reservoir for the presence of
water.

2.

If necessary, drain the water via plug (2)
using the fuel lift pump (1).

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95

XF series

Removal and installation

XF ENGINE FUEL SYSTEM

4-1

4.  REMOVAL AND INSTALLATION

4.1

REMOVAL AND INSTALLATION OF INJECTION LINES

Always leave the injection lines
fixed together, as a complete set.
Never remove or shift the clamping
brackets (A) holding the lines
together. Never bend injection lines
as they may crack.

Removing the injection lines
1.

Clean the unions and the area surrounding
the injectors and the fuel pump.

2.

Note:
When slackening the injection-line unions,
hold the injector’s side connection back
using an open-end spanner.

Slacken the unions from the injection lines
on the injector side.

3.

Slacken the unions from the injection lines
on the fuel-pump side.

4.

Immediately plug the openings.

5.

Remove the injection lines.

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4

XF ENGINE FUEL SYSTEM

Removal and installation

95

XF series

4-2

Installing the injection lines
1.

Purge the injection lines with dry
compressed air.

2.

Check whether the injector side connection
is tightened to the specified tightening
torque, see main group “Technical data”.

3.

Fit the injection lines.

4.

Note:
When tightening the injection-line unions,
hold the injector’s side connection back
using an open-end spanner.

Tighten the union nuts of the injection lines
to the specified tightening torque, see main
group “Technical data”.

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95

XF series

Removal and installation

XF ENGINE FUEL SYSTEM

4-3

4.2

REMOVAL AND INSTALLATION OF INJECTORS

Because there is overpressure in
the fuel tank, fuel may penetrate the
cylinders when the injectors are
removed. Therefore, when removing
injectors, always take off the
fuel-tank cap first. Collect any fuel
leaving the injectors.

Note:
If the engine has been fitted with a DEB, the
latter must be removed before the injectors can
be removed.
While the DEB is being installed, both the DEB
clearance and the valve clearance must be set.

Removing the injectors
1.

Remove the injection lines.

2.

Remove the valve covers.

3.

Remove the DEB, if applicable.

4.

Remove the attachment bolt (3) of the
injector clamp.

5.

To remove the injector and the clamp, only
use the special tools (DAF no. 1329412 and
DAF no. 0694928).

Note:
If during removal one or more copper
shims (1) remain in the injector sleeve, the
injector will be reinstalled in a higher
position.
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As a result, instead of spraying into the
combustion chamber of the piston, the
fuel will be sprayed onto the piston ring.
This may seriously damage the piston.

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There will be inadequate sealing
between the O-ring (2) of the injector
and the cylinder head. Fuel leaking
from the injector can freely flow into the
engine and dilute the lubricating oil.

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