Toyota 3R-B 1969, Repair Manual

Page: 123 / 193

6-6 L U B R I C A T I N G S Y S T E M - Oil Filter
Description
T h e oil filter is of a paper element type which is treated with a special resin.
N o rm a lly, the oil from the oil pump is fully filtered b efore lubricating each inter­
nal component. If the element is clogged, the oil line p ressu re beyond the e le ­
ment will d e c re a s e by the resistance of the clogged element. T o prevent this,
the oil cleaner is provided with a lifter valve at the filter cap.
T h e difference of the oil p r e s s u re between the 'element inlet side and the outlet
side becom es 0.8 ~ 1.2 kg/cm2 (1 1 .4 ~ 17.1 p s i ) , and the lifter valve starts
to open counteracting against the relief valve spring by the inlet side p r e s s u r e ,
which causes the oil to b y -p a s s . In this manner, the oil from the pump is d e­
livered to the hole within the cylinder block directly without filtering the o i l , and
without d ec reasin g the oil line p r e s s u r e .
S pecification:
T y p e
Case capacity
Filtering a r e a
L ifter va lve operating p r e s s u r e :
at oil temperature 70 — 75° C
(158 ~ 167° F )
Using oil S A E 30
Oil leak
P a p e r element
Approxim ately 0 .8 liter (0.85 U S
qts . , or 0 .7 Imp . qts )
Approxim ately 2,650 cm2 (410 in2 )
Starts to open at 0.8 ™ 1.2 kg/cm2
(1 1 .4
m
17.1 p s i )
L e s s than 0 .2 liter (0.21 U S q t s . ,
o r 0.18 Imp. qts) per minute at 0.7
kg/cm2 (9 . 9 psi)
1 . V a lv e retaining bolt
2. Gasket
3. Lifter valve spring
4 . W asher
5. L ifter valve
6. Oil filter gasket
7. Oil filter cap
8. Oil filter body gasket
9. C artridge guide gasket
10. Oil filter element
11. Oil filter case
12. W asher
13. F ilter support spring
14. Gasket
15. Drain plug
16 . C artridge guide gasket
17 . Cartridge guide
F i g . 6-10 Oil Fi lt er Components
Y6174