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MAINTENANCE
AND
ADJUSTMENT
Unit
:
mm (in.)
Sta
ndard
Service
Item
limit
-
Clearance
between
0
.0
13
-
0.15
0
.25
inne r
rotor
all
d
(0.0005
-
0.0059)
(0.0098)
outer
rotor
(2)
Sliding
clearance between
rol""
and
coyer
This
clearance
i~
required
to
be not
greater
fhan
0
.15
mm
(0.00591 in
.).
If
this
limit
is
exceeded,
grin
d
orr
the
mating
face
of
the body
to
reduce
the
clearance.
Un
it:
mm
lin.)
Item
Sta
ndard
I
Repair
lima
Clearance
be Iwcen
0
.04-
0
.09
I
0.15
rot
ors
and
cover
(0.0016
-
0.0035)
(0.0059)
Checking
r
otor-ta-cover
claaranoe
(3)
Radial
clearance between out.,
rotor
and pump
body
64
Insert
iJ
thickness. gauge
into between outer rotor
and
body.
If
the
clearance
checked is
greater
Ihon
the
limIl,
replace
the warn
part.
CheckiJ\9
rotor-to-
body
cleara
nCE!
Unit:
mm
(i
n.)
Service
Item
Standard
limit
Clearance between
0.2-0.28
0
.5
outer rotor and
(0 .0079 -
0.0110)
(0 .01
97)
body
-
-
(4)
Rotor shaft diameter
Inspect ihe
shaft
for
damage,
and
check
it fo
r
wear
by
miking.
Determine
the
available
clearance
of lite
shaft in
the
pump
body
from
Ihe
mike
readings;
if
the
service lim
it
in
fenns
of clea
rance
val
ue
is
exceeded
Or
if
the
shaft
is
in
badly
dam-
aged condition,
replacement
is
necessary.
U
nit:
mm
(i n.)
.
.
Service
Item
Standard
limil
+0
Rotor
~"fl
13
-
0,0
15
diameter
+0
(0
.512
-0.00059)
Sholl
to
body
0.032 -0.074
0.15
clearance
(0.00126
-
0.00291)
(0.0059)
-
Oil mter
inspection
The ftltering
elelnent is prescribed to
be
replaced
3fttr
each 600 hours.
of
operalion
Ot
whenever its
filte
ring
performance
is
note.d
to
have
deteriorated
.
Inspect
the
element
(0
see if
it
has any
signs
of
rupture
or
fissure
;
and if so, replace
it
by
a
new one. Visually
-e
xamine the-
fllter
case
for
distortion
and
cracks.
Relier
valve inspection
First, inspect
the
valve and valve seal
for
seating contacl
,
an
d
·check.
its
spring for condition
.
Poor s.ealing cafl be
corrected by
lapping. A
b
roken
or fatigued spring
must
be
replaced
.
Next
,
check
the
relief
valve
fo
r
relieviJlg
pressure
on
reference
to
the
specification. Increase
or
decrease lhe
spring
p
reload
,
as
necessary,
to
oblain
•
relleving
(open-
ing) pressure wiOun
fO
.3
kg/em'
(f4.27
psi) of 3
kg/cm'
(42.7
psi).
Un
it:
kg/cm' (p,l)
Item
Standard'
Relief
valve
opening
3
±
0.3
pressure
(42
.7
±
4.27)
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