DAF LF45, LF55 Series. Manual — part 637

©

200515

1-1

Threaded connections

THREADED CONNECTIONS

ΛΦ45/55 series

2

1. THREADED CONNECTIONS

1.1 GENERAL

The components may have threaded connections

that have been treated with lubricant (dipped

threaded connection). Galvanised bolts and nuts

are wax dipped in the factory. Black annealed

and phosphatised bolts and nuts are oil dipped.

The advantage of using dipped nuts and bolts is

that friction during tightening is reduced, so that

the specified pre-tension force can be accurately

obtained. The tightening torque can be reduced

while the pre-tension force remains the same.

To achieve a small spread in the pre-tension

force, the dipped threaded connection must be

tightened accurately.

Therefore, always use a reliable torque wrench

that provides a high degree of accuracy.

Note:

Have torque wrenches regularly inspected and

calibrated.

Re-use of fasteners (bolt/nut/threaded end)
1.

Clean the thread (take particular care to

remove locking compound residues) and the

clamping faces

2.

Check the thread for damage.

To do so, manually screw a new nut/bolt onto

the thread to be checked.

If the new nut/bolt cannot be fully hand-

screwed onto the entire thread of the

fastener to be checked, the fastener is not

allowed to be re-used.

3.

Apply one drop of engine oil to the upper turn

of the bolt (threaded end)/lower turn of the

nut and one drop to the clamping faces

(other lubricants are not allowed).

4.

If a locking compound has been specified, oil

should not be applied to the thread.

THREADED CONNECTIONS

1-2

©

200515

Threaded connections

2

ΛΦ45/55 series

The following applies to all threaded
connections (for both new and used
vehicles):
-

in the case of standard connections, apply

the lubricant before fitting, and (re)tighten in

accordance with the standard for dipped

bolts;

-

in the case of special connections, apply the

lubricant before fitting, and (re)tighten in

accordance with the values specified in the

instructions.

The instructions for using lubricants also apply to

new bolts from the warehouse. Dry threaded

connections may not be used because of their

highly variable friction coefficients.

Please consult the workshop manual

for the specified tightening torque.

}

©

200515

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Contents

FLUIDS, OIL AND LUBRICANTS

ΛΦ45/55 series

3

3 Fluids, oil and lubricants

CONTENTS

Page

Date

1.

SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200515
1.1

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200515

FLUIDS, OIL AND LUBRICANTS

2

©

200515

Contents

3

ΛΦ45/55 series