Caterham Seven User Manual download pdf (Page 54)

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The majority of fastenings have washers

inserted between the nut and or bolt head

and the item being secured. Spring

washers or lock washers are usually

placed next to the bolt head or nut then

the plain washer. As a general rule the

following washers are used as detailed:

Plain washer

 To protect the surface and spread

a load when attaching to a soft

material such as glass fibre or

aluminium.

 To adjust the spacing of one

component to another use plain

washers of appropriate thickness

and external diameter.

 To present a uniform surface on

which to tighten a fastening onto a

rough or irregular surface.

Spring washer

 To lock a thread where there is a

possibility of the nut or bolt working

loose. Not used with a nyloc nut.

Large diameter, thin plain washer

 To spread a load onto very thin

material.

Large diameter plain washer

 To prevent migration (sideways

movement) of rubber bushes.

 The large plain chamfered washers

are often used in conjunction with

the metalistic suspension bushes.

Where this is the case the

chamfered edge must be fitted

towards the bush to prevent

contact with the outer metal part of

the bush.

Particular care should be taken to ensure

that the correct fastening is being used,

since it is possible to use an overlong bolt

only to find that it is apparently missing

when the only remaining bolts are too

short.

The majority of fasteners supplied by

Caterham are in polythene bags with an

A4 sheet on a card insert, refer to Fig 23.

The A4 sheet can be used to confirm that

the contents are correct. Each pack has a

unique number, located at the top RH

corner and each item within the pack can

be identified by a number at the bottom

LH corner of the part number box. Where

fasteners are specified in the text, the

unique pack number will be stated the first

time it is required along with the

description and the Item Identification

number in brackets. The next time an

item from that pack is required it will be

identified by description and the Item

Identification number only, for example:

1 2 ... 49 50 51 52 53 54 55 56 57 58 59 ... 226 227

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