D ts
ssEiaLY
Refipve
lhe
re+alnlng
scrers
A
(ll
pcs]
fo
fake
ofl
+he
cyllnder
head B and +he
valve
Dlale
C.
Remove
the
Inlet valve
heads l, springs 2,
valve guldes
5 and
gaskei
4.
Loosen i-he
retalnlng
screws
D
(2
pcs)
and
delach
the
cyllnder
head fron ihe valve pla+e.
Renovo
lhe dellvery
valve
heads 5, sprlngs 6
and
oasket 7.
Fll
the
lnle'i
valve
head
guldes
lnio ihelr
recesses rlth ihe
cut-aeay
sldos lowards +helr
respect lve
cyllnder
bores.
Assemble
+he Inlei
valve
heads
and ihe
sprlngs. Flt
fhe cyllnder
head
uslng a nelr
gaskei.
Tlghien
ihe re+alnlng
screis evenfy
+o 20,3...21,0 Nm. Ensure
ihat
ihe valve
heads move freelv. DO NOT LUBR ICATE
THE VALVE
HEADS OR SPRINGS.
At+ach
l'he alr fll+er
(lf
necessary) and usd
a
new
qasKer,
2.
Renf,ve
the re+alnlng
screvrs of +he
alr
(
lf assembled)
and take
off the tllier
gaske+
9.
fllter I
and +he
Rerove fhe
unloader
sprlng and
saddle l0 as
v{ell
a6 lhe
plsions
and +he
o-rlngs soals ll.
lf
necessary,
remove
lhe
roar
end cover E and
Its
o-rlng
seal 12
and +he boi+om
cover F lrlth
Its gaskef
ll.
Not€ | Do
no+
+ry io renove +he
valve
sea+s
O. They are
pressed
ln durlng
manufac-iure
and
aro Iniegral
par+s
of the crankcase
H.
INSPECT
ION
Thoroughly
clean all removed
paris.
Ensure
l-hat
all
alr and waier
passages
are clear. Clean
off
anv
cårbon
lrom +he
olsion heads
and +he
cyllnder top
paris.
Check
the
condl+lon of
ihe inlet and dellvery
valve
seats. 0nly
sllgh+, even
wear ls
perml+ted.
lf
the
dellvery
valve sea+s show
conslderable
wear,
renew
+he valve
plaie
C. l{
+he Inle+ valve sea+s are
excessivelv worn,
rep lace ihe
crankcase H. You can
also replace
+he lnle+
valve
seats, bu+ +hen
you need +o
re-bore +he
cyllnders
after the new seats have
been J li+ed.
N,oiel The are
+wo
overslze
plsions supplled
for
+he
compressor.
The overslzes are
0,254
rm
and 0,508 rin. Bore ihe cyllnders
ihen +o l'he
dlmenslons
ö
15,254 rnm or
d
75,508 lltn.
Ensure ihat +ho nevl
unloader
pls+ons
l1 are a
good
sl ldlng fl+ In +helr
guldes.
lf
the
guldes
ore appreclably
worn,
renew them.
Check
the bearings for wear and
replace +hem,
lf necessary.
lf needed, +he sllde
bearlng ln
ihe end cover E can
be renewed.
REASSEtaLY
Flt a nev, O-rlng seal
l2 In I1-s
groove
and
place
the end cover
ln lts
posl+ion
by
pushlng
fron
fhe back.
T lghien
+he
cover
re+a I nl ng
screws evenly to 17...21 Nm.
Fli +he bo+tom cover
wl+h
a nev
gaske+
ln
place
(
lf removed). Tlghten
+he
refalnlng screv.s
even ly
to
8...10
Nm.
Insert now
O-rlngs ln +he unloader
plsions.
Lubrlca+e lhe
O-rlngs and lhe
plsion
guldes
llgh+ly
t{l+h e.g.
slllcone lubrlcan+.
Fli +he
pls+ons
In +helr
guldes
and reassemb le
+he
unloader
saddle and
sprlng. Ensure tha+ ihe
unloader mechan
lsm moves
freely.
Fl+ the
dellvery
valve
heads
and sprlngs In+o
the
valve
pla+e.
Inser+ a nevr
gaske+
and
flx
the
valve pla+e
ln ihe
cyllndor head.
Tlghten
l-he
scrows
D +o 5,4...8,1
Nm. Ensure ihal +he
valve
heads
move
freely. DO t{oT
LUBR
ICATE
THE V^I-YE HEADS M SFRINGS.
11-3
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