Oll Pump, Relief Valve; Oll Filter; G Roup 22. Lubricating System - Volvo 164, 1970 Service Manual

GROUP 22
LUBRICATING SYSTEM
DESCRI PTION
The eng in e ha' s ·a force-feed lubrica, t ing system, see
Fig. 2-39. PJ1essu re is prev id ed by ,a gear pump driven
from the cams haft and f ifted under the
cranksha~t
in
the sump. The gear pump forces the ei l past the
rel, i ef valve, which is alse fitted on the pump, threugh
Fig .
2-39.
Lubrication system
l. Oil pump
2. Sump
3. Nozzle
4. Oi I fi Iter
Oll PUMP, RELIEF VAlVE
The eil pump, see Fig.
2-40,
is ef the gear rtype and
is driven threugh a gear train f.rom the camshaft.
The delivery pipe from the pump te l t he cylinder
block dees net have screw uniens and is, therefe,re,
autematica1 ldy tightened in pesitien when :the a' t t,a,ch-
ing bal, t s fer the pump are tightened. A,t each end
ef the pipe the·re are sealing rings made ef special
rubber. The relief valve ,is fitted drredly en the pump
and cens;sts ef a spring-Ioaded ball. The baH has a
cyl,indricall guide with a step at the end pesitien and,
there~ere,
operates flexibly. Even 0Jt idling speed
there is a certain ameunt ef everHew, se tha' t the eil
pressure is then relatively lew.
the oi,1 f,iHer and ,then , t hreugh eilways eut te the
varieus lubri cahng pe ints. A ll the oil supplied te the
lubrica, N ng pe ints, therefere, first passes th reugh the
eil fi lter.
Oll FilTER
The eil filtter (see Fig.
2-41),
which is manufactul,"ed as
a single unit complete with element, is ef the fvll-
Hew type ·and is screwed direcNyinte thecylinde.r
block. The eil which is fe,d eut te the varieus lubricat-
ing peints in the engine first passes threugh the eil
filter element which is made ef special paper. In the
eil hlter rthere is a by.,pass valve which allews the
e,il
;110'
by-pass the element if resist,ance to flew sheuld
belceme excessive. When replacing the filter, the eld
ene is discarded cempletely and a new ene fitted .
2 : 19