2.7 PRACTICAL HINTS
A) Fitting snap rings
One side of the “Benzing” snap rings
(1)
has a round-
ed edge and the other a sharp edge.
For maximum grip the rounded part needs to be fac-
ing towards the element to be held
(2)
, with the sharp
edges on the outside.
B) Joint pivot pins
There are a lot of pivot pins, usually connected to
rods, that should be able to move in various direc-
tions.
A typical situation has the pin
(3)
fixed by a self-lock-
ing nut
(4)
with two anti-friction washers
(5)
in
between the pin
(3)
and the support element, and
between this and the nut
(4)
.
Since these are joints, the nut must never be tight-
ened completely but only so much that it can ensure
the free rotational movement of the pin on its axis
without, however, creating excessive free play which
could result in the parts concerned becoming mis-
aligned and failing to work correctly.
C) Crown fasteners
Some pin ends
(6)
are secured by crown fasteners
(7)
. During dismantling, these fasteners are always
damaged and lose their hold,
so they should never
be reused
.
On assembly, make sure it is inserted in the right
direction and push the fastener
(7)
onto the pin using
a pipe or socket spanner
(8)
with the right diameter,
so that it can be fitted without deforming the fastener
“crown”.
A deformed fastener should always be replaced.
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2.7
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