DAF CF65, CF75, CF85 Series . Manual - part 1086

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General

CHASSIS

ΧΦ65/75/85 series

9

2

1.2 DRILLING IN THE CHASSIS

Note:

There are several stress zones in a chassis. 

Working on the chassis without proper 

knowledge (and not according to DAF 

instructions) may cause irreversible damage to 

the chassis. The repair shop or bodybuilder 

would be held fully responsible for such work and 

for any superstructure fitted.

If holes must be drilled in the chassis frame, note 

the following points:

-

Drilling holes within a distance of 70 mm 

(distance A) from a bend in the chassis is not 

permitted.

-

It is on no account permitted to drill holes in 

the tapered ends at the rear of a tractor 

chassis.

-

Drilling holes in the flanges of the chassis 

side members is not permitted.

-

The maximum diameter for drilled holes is 

17 mm (dimension D in the drawing).

-

The distance between the holes, and 

between the holes and the side member 

flange, must be at least 3xD - with a 

minimum of 30 mm (dimension B in the 

drawing).

-

The distance between the lower stud hole 

and the chassis underside should at least be 

equal to distance C.

Distance C is > 70 mm for a tractor chassis.

Distance C is > 50 mm for all other chassis.

-

Deburr (at an angle of 45

) and paint the 

drilled hole.

Wheelbase alteration
Any alteration to the wheelbase or changes to the 

rear overhang should be done in accordance with 

the latest DAF Trucks Bodybuilders' Guidelines.

Note:

When using the Bodybuilders' Guidelines, you 

are advised to first read the "General" section.

A

A

A

A

A

A

A

A

C9 00 304

B

D

B

B

C

B

C9 00 291

CHASSIS

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General

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ΧΦ65/75/85 series

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1.3 REPLACING RIVETS BY BOLTS

Note:

A rivet may either be replaced by a flange bolt 

M14 x 2, property class 8.8 (DIN 6921), or a 

flange bolt M16 x 2, property class 10.9. 

Removing the rivet
1.

Remove the rivet head. Make sure not to 

damage the chassis during this procedure.

2.

Use a 10-mm drill to drill a hole in the rivet. 

Remove the rivet from the chassis.

Fitting flange bolt M14
1.

Ream the rivet hole to fit 14 H7 

(14 + .000 - 14 + .018 mm). Make sure not 

to damage any lines running behind the 

rivet hole. Deburr the edges.

2.

Repair the chassis paintwork. The new 

paintwork should be no thicker than 

50 microns.

3.

It is important that part of the bolt shank is not 

threaded. Determine the length (L) of the 

non-threaded shank part using the formula 

below.

L = T1 + T3, in which T3 must be > 

1

/

2

 T2.

L = shank length without thread

T1 = part to be clamped

T2 = part to be clamped

4.

Tighten the flange bolt to the standard 

tightening torque for bolts, property 

class 8.8.

L

T3

T1

T2

C9 00 295

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General

CHASSIS

ΧΦ65/75/85 series

9

2

Fitting flange bolt M16
1.

Drill the rivet hole out to 

 17 mm. Make sure 

not to damage any lines running behind the 

rivet hole. Deburr the edges.

2.

Repair the chassis paintwork. The 

new paintwork should be no thicker than 

50 microns.

3.

Install a flange bolt M16 x 2, property 

class 10.9, with a non-threaded shank (A) of 

6 mm.

4.

Tighten the flange bolt to the standard 

tightening torque for bolts, property 

class 10.9.

A

C9 00 296

CHASSIS

1-8

©

 200448

General

2

ΧΦ65/75/85 series

9