Perkins L4 Workshop Manual - L-36 Fleet

1
Filters-continued Pa1!e G3
Fig. G6. Fuel Filter in section showing fuel fiow throUgh
element
Tbe arrangement of these two filters varies
'lccording to application. Cn some applications
both filters are fitted, on others either one or the
other is fitted.
(3) Paper element type filter.
Water Trap.
This filter varies according to application.
The gauze strainer is contained in an easily
removable bowl and should be cleaned in accordance
with periodical attentions. Section F.
Pre-filter.
This unit's main purpose is to protect the fuel
lift pump. It bas a comparatively coarse element.
(See Fig. G .2).
When re-assembling, take care that a good joint
is made between the top of the bowl and the filter
body, as any leakage of air here, that is, on the
suction side of the fuel pump, rnay cause air looks
in the fuel system.
Paper Element Filter.
It is not possible to clean the paper element in
this filter.
It should be renewed every 1,000 hours. Every
250 hours unscrew the drain plug at the bottom
of the filter bowl and allow fuel to fiow through
until clean fuel oil appears. Replace drain plug.
To remove the element, unscrew the larger nut
in the rentTe of the cover and drop the filter bowl
clear (See Figs. G3 and G4).
Remove the dirty element and throw away.
(Fig. G5).
Before putting new element in position, clean
the filter bowl and inspect the relief valve.
Ensure that the rubber joints are in good con.
dition, if not, replace by new.
LUBRICAnNG On.. FILTERS
The importance of using clean lubricating oil
in the fust place, and providing means to ensure
This element is contained in an easily removable
bowl and should be cleaned in accordance with
periodical attentions. Section F.
To remove element for cleaning, unscrew
knurled nut at the bottom of the bowl. Swing
the stirrup clear and remove filter bowl.
Remove element and wash in paraffin or clean
fuel oil. Clean out and wash filter bowl in clean
paraffin or fuel oil. Fig. G7