O.S. Engines 21RG-X - Manual (Page 6)

10
ASSEMBLY
1.
2. Installing the element.
Slide the element base over the center tube (See
Fig.1) and press down.
If it is tight at the bottom, apply one or two drops of
fuel at the point marked in Fig.2
Press down near to the center (not the outside) to
avoid risk of breaking the element base.
The element is already impregnated with a special
filter oil. As this oil is very sticky, take care, when
handling it, to prevent dust or dirt adhering to the
element, especially to its inner surface before
insertion of the center screen.
Press at center.
Fig.1 Fig.2 Fig.3
Center Tube
Element Base
Apply one or two
drops of fuel.
Press down
firmly.
Apply pressure until the element base fits firmly
against the collar of the center tube (Fig.3).
If your fingers become contaminated, wash them with
soap and water.
NOTE: During storage, the oil may have become
unevenly dispersed through the element. This will
be indicated if the blue color of the element
material appears patchy.
In this case, place the element in a small plastic
bag and gently rub the element between finger
and thumb to redistribute the oil.
Now insert the cylindrical center screen into the
element, followed by the center tube.
Do not, at anytime, omit the screen: it is essential for
releasing air to the engine evenly.
Fit the end plate, washer and retaining screw,
making sure that the element fits correctly between
the end plate and base.
Element
misaligned
11
1
3
INSTALLATION
1.
2.
3.
REPLACEMENT OF ELEMENT
1.
2.
Apply instant setting
glue to the joint be-
tween the air cleaner
and the intake elbow
and secure with strap
supplied.
Fit the other end of
the elbow over the carburettor intake and secure with
strap supplied. Do not use glue at this point.
It is advisable to brace the outer end of the air
cleaner to the car chassis with a piano wire strut.
This will restrain the cleaner in the event of the
vehicle overturning or being involved in a collision.
Under very dusty conditions, it is advisable to
replace the filter element after each hour of running
time.
Under less severe conditions, however, it may be
possible to operate for longer periods. The rate at
which the elements become unusable may be
determined as follows.
Apply instant fixing glue.
Washer
Strut
Assembly
Screw
Do not apply
glue to
carburettor
After one hour of running time, remove the element
but, before discarding it, check the penetration of
foreign matter by cutting through the wall of the
element. If dirt has penetrated 1/3rd or more from the
outer surface, each element must always be
replaced within one hour, when the vehicle is run
under similar conditions. If, on the other hand, the
element is much less deeply soiled, the engine may
be run a little longer before another new element is
installed, but remember to check the condition of the
discarded element, as before. If the old element is
examined in this way
every time a new element
is fitted, one can more
closely estimate the safe
life of the element under
known running conditions.
Remember that the condition of the filter element will
depend on weather, as well as track conditions. If, for
example, the element surface is still visible and
remains moist, further running is permissible.
If, however, the surface is no longer visible, or if dust
adhering to the surface has become dry, it is time to
replace the element.