Chapter 5 Lubrication System
2. Lube Oil Pump
4LHA Sen
2-3 Lube oil
pump
disassembly
(1) Remove the lube oil pump assembly from the engine
plate.
(2) The lube oil pump cover may be disassembled, but
do
not disassemble the rotor, rotor shaft or drive gear.
The
oil pressure regulating valve plug is coated
with
adhesive
and screwed in, so it cannot be
disassembled.
These
parts cannot be reused after disassembly.
Replace
if
necessary
as an assembly.
2-4 Lube oil
pump
inspection
(1)
Clearance
between outer rotor
and
pump body
Insert a feeler gauge between the outer rotor and pump
body
to measure the clearance, and replace if it ex-
ceeds
the
limit.
Outer
rotor
Body
Feeler
gauge
Standard
Wear
limit
Outer
rotor and
pump body clearance
0.100-0.155
(0.0039 - 0.0061)
0.20
(0.0098)
(2)
Clearance
between outer rotor
and
inner rotor
To
measure clearance, insert a feeler gauge between
the top of the inner rotor tooth and the top of the outer
rotor tooth, and replace if it exceeds the
limit.
Inner rotor
Outer
rotor
Feeler
gauge
Clearance
Inner rotor
Outer
rotor
Standard
Wear
limit
Outer
rotor and
inner rotor clearance
0.050 ~ 0.105
(0.0019 ~ 0.0041)
0.15
(0.0059)
(3)
Clearance
between pump body and inner rotor side of
outer rotor
Place
a straight-edge against the end of the pump body
and
insert a feeler gauge between the straight-edge
and
the rotor to measure side clearance.
Replace
the
assembly
if the
clearance
exceeds
the
limit.
Straight
scale
Body
Feeler
gauge
Standard
Wear
limit
Pump
body and inner rotor,
outer rotor clearance
0.05-0.10
(0.0020 - 0.0039)
0.13
(0.0051)
(4)
Check
for
looseness
of driver gear/rotor shaft fitting, and
replace
the entire
assembly
if loose or wobbly.
(5)
Push
the oil pressure regulating valve piston from the oil
hole
side,
and
replace
the
assembly
if the piston does not
return due to spring
breakage,
etc.
(6)
Make
sure
that
the rotor shaft rotates smoothly
and
easily
when the drive gear is rotated.
5-5
To Next Page
Loading...
Need help?
General
