Caterham Seven User Manual Page 53

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additive
diff additive
Brake fluid
Comma DOT4
Comma
DOT4
Engine
coolant
Comma
Xstream red or
ford super plus
anti-freeze
Comma
Xstream red
or ford
super plus
anti-freeze
Comma
Xstream
red
It is recommended that a sturdy
workbench and a good vice are made
available for holding items stable.
The application of undue force should not
be necessary if assembly is carried out in
the correct sequence.
3.4) Nuts, bolts and washers
As a general rule the fasteners used are
RH thread and of Metric dimensions.
Some Imperial fasteners are still used,
particularly within the brakes and
suspension.
Always assume that bolts and fasteners
are not properly tightened until they have
been specifically checked.
All safety critical fastenings supplied by
Caterham Cars are high tensile
conforming to British Standards 1768
(Imperial) and 3692 (Metric). Customers
supplying their own fasteners should only
use fasteners with heads marked 10.9
and 12.9 particularly when attaching
suspension, steering, upright and axle
kits. Any unmarked bolt should not be
used.
Ensure that the correct tightening torque
is applied. Where torque figures are not
specified, use the figures detailed in Table
11. Particular care must be taken when
using the torque wrench to tighten
fastenings into aluminium.
Table 11: General torque figures
Thread
Socket size
Torque
(Nm)
1/4” UNF/UNC
7/16” A/F
7
5/16” UNF/UNC
1/2” A/F
20
3/8” UNF/UNC
9/16” A/F
34
7/16” UNF
5/8” or 11/16”
A/F
47
1/2” UNF
3/4” A/F
61
5mm
10mm
6
6mm
11mm
7
8mm
13mm
20
10mm
17mm
47
12mm
19mm
61
It is good practice to mark the bolt head or
nut with a spot of paint once it has been
finally tightened. This provides a good
visual means of checking that all fixings
have been set to the correct torque.
Over tightening can often cause more
problems than under tightening, such as
sheared bolts and studs and incorrect
stresses.
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