Mitsubishi S4E - Page 70

MAINTENANCE A ND ADJUSTMENT
Unit : mm (in.)
S ta nda rd
S ervice
Item
lim it
-
Cl earance between
0.013 - 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 cl earan ce i~ req uire d to be not gre ate r fhan
0.15 mm (0.005 91 in.). If this limit is exceeded,
grind o
rr t he mating face of the body to re duce
th e clea rance.
Un i t: mm lin .)
Item
Sta ndard
I Repair
lima
Clea rance be Iwc en
0. 04- 0 .09
I 0.15
rot o rs an d co ver
(0.0 016 - 0.0035) (0.0059)
Checking rotor-ta-cover claaran oe
(3) Radial clearance between out., roto r and pump
body
64
Insert iJ thickness. gauge into between outer rotor
and body. If the clearance checked is greater Ihon
the limIl, re place the warn part.
CheckiJ\9 roto r-to- body cle a ra n CE!
Unit : mm (i n.)
Service
I tem Standard
lim it
Clearance b etween
0.2-0.28
0 .5
outer rotor and
(0.0079 - 0.0110) (0 . 01 97)
body
-
-
(4) Rotor shaft diameter
Inspect ihe shaft f or damage, and ch eck it fo r
wear by miking. Dete rmin e the ava il able cl ear a nc e
of l ite sh aft in the pu mp body from Ihe mike
re adin gs; if the service lim it in fenns of clea ra nce
v al ue is exc ee ded Or if the sh aft is in badl y dam-
ag ed condition, replaceme nt is ne cess ar y.
U nit: mm (i n .)
. .
Service
Item
S tandard
limil
+0
Rotor ~"fl
13 - 0,0 15
diamete r +0
(0.512 -0.00059 )
Sholl to body 0.032 -0 .074
0.15
c le a ra nce
(0.00126 - 0.00291)
(0.0059)
-
Oil mter inspection
The ftlt e ring el elnent is prescribed to be replaced 3fttr
eac h 600 hours. of operalion Ot wheneve r it s filter ing
performance is n ote.d to have deteriorated. Insp ect the
element (0 se e if it has any si gn s of rupture or fissure ;
and if so, replace it by a new one. Visually -e x amine t he-
fllter case for distortion an d cracks.
Relier valve inspection
Fi rst, 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 broken or fatigued spring must
be replaced.
Next, check the reli ef valve fo r relieviJ lg pr essure on
reference to the spe cification. Inc r ease or decrease lhe
spring preload, as ne cessa ry , to ob la in • relleving (open-
ing) pressure wiOun fO .3 kg/em' (f4 . 27 ps i) of 3 kg/cm'
(42.7 psi).
Un it: kg/cm' (p,l)
Item Standard'
Reli ef valve opening
3 ± 0.3
pre ssur e (42.7 ± 4.27)