Perkins L4 Workshop Manual - L-36 Fleet

1
1
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Filters-continued rage G5
Fig. GIO.
To Remove and Clean Element.
Unscrew nut on cover and remove cover.
Remove by-pass valve assembly (See Fig. G7).
Remove element (See Fig. G8).
Clean element in paraffin and allow to dry before
replacing (See Fig. G9).
Remove drain plug at base of filter casing and
clean filter casing witb paraffin.
To re-assemble, reverse order of procedure.
Ensure that tbe felt sealing ring around tbe bypass
valve piston and tbe rubber sealing wasber
are in good condition.
NOTE - On certain applications, the lubricating
oil filter is fitted as shown in Figs. G.1 0 and 11.
To remove and clean the element of this filter:
(1) Unscrew bolt and remove top cover.
(2) Remove spring and element press\tre plate.
(3) Remove element.
(5) Remove by-pass valve assembly. This is
best etfected by means of a piece of wire
bent to form a hook at one end.
(6) Remove drain plug at base of filter casing
and clean filter casing with paraffin.
(7) Re-assemble filter unit in reverse order to
dismantling.
lt should be noted that the by-pass valve
assembly should always be replaced in a position
adjacent to where the filter is mounted to the
cylinder block.
CAUTION .
Ir tbe filter element is not cleaned as recommended,
tbe flow of oil tbrough the filter is restricted.
Tbis does not, however, prevent oil
passing to the engine, for when restriction takes
place, the by-pass valve opens and permits unfiltered
oil to continue to flow round the engine.
The consequence of this need not be described.
Do not, tberefore, omit to clean tbe element as
prescribed.
(4) Clean element
in paraffin or fuel oil. Allow
to dry before replacing. Fig. GIl.