DISASSEMBLY
AND
REASSEMBLY
Untt: k!tm Ift·lbl
Item
Limit
Delivery
valvo
ho
lder 2.5 - 3
.5
tightening torque
(18 -
25)
f.
Each
pl
u
nger
h
as
its
part
nu
mber
punch
ed on i
ts
fl.nge.
Whtn
reassembling the injection pump,
be
s
ure
to position e3ch plunger
$0
that
i
ts
pWlched
part
faces the
front
~
thi
s means that. wi
th
the
plung
er
so
posit
ione
d,
its:
c
ontrol
gr
o
ov
e
meets
t
he
reed hole. Remember, the adjusta
bU
ily
of injection
q
uanti
ty
p
re
su
pposes t
hat
aU
pl
u
ng
ers.
ar
e
so
p
os.i-
tioned in \heir barrels .
.,.--
CD
o
(2)
Tht
off
'f
i
de
tlas
if
'et1ar
A
Of
L mafked
by
P
lJnthin~.
~
E)Camp
!o
0'
p.!I1t
numOO
r
' -FeltS
nOll!
2.cOf'trolgrooq
PumpIng element
parts
g.
It
is highly
e"enlia
l
IhOi
Ihe conlrol rack should
s.lide
smoothly
in
place.
If
any
stickiness
is
noted
after
te-assembly,
t
he
pump
must
be
disassemb1ed
and
reassembled
om::e
again
. S
ti
ckiness
of
the
contro
l
rack
is
o
ft
en
caused
by
nicks
or
dents
s
ufferred
by the
rack
,
defectiv~
rac
k teeth
or
plnion leeth, lnterfetence between pinion
and
pu
mp
housing,
or
overtightened delh'ey
',alve
holders.
h. Axial play is specified for the camshaft.
Make
sllT
e
that it
is between 0.
03
and 0.05
mm
(0.00)2
and
0.0020 m.). )f
100
much or too little a play
is
noted,
.dju,!
it by shimming.
(2) Disassembling procedure
112
(0) Drain lube o
il
.
Ex:tJIlln
e t
he
dIained
011
for
e
vid
en
ce
of
ma.lconditio
n.
Se
t the injection
pump
fi
rmly on the work bonch. by me
an,
of
the
ho
lding fixture.
Remove the
cOver
plate
and
look
in
to
~e
if
lhe
r
-e
are
s
igns
ofmaicondition.
(NOT
E]
Removi
ng
one
part
after
another
without exam-
ining
ea.ch
pa
rt critic
ally
and
heeding to
the
sto
ry
ea
ch
part
wants
to
tell
is
a wasteful
practice and prevents
you
from taking proper
mea
s
ures
ne
r;c
s
saf}
1
(o
r restoring the p
ump
as
dose
to
th
e original condition
as
pO
SS
ible.
Se
tt
ing up pump by mea
ns
of
holding fixture
(b) Remove \he governor from the
pump
proper,
as
in
G
overnor
tli~ssemb
l
y
.
(0)
Turn
the
pump
camshaft
by
hand
to
" feel"
the
resistance of
camsha
ft
: abllormal resistance
means
thai
there
is
something wrong in
the
pump
.
Usmg
a
s.prjng
balance,
measure
the
sliding
resistance
or
the
I;ontrol
nck
t
and
write
down
the
reading
for
rererence
. A
ljmit
is
specifie d
on
t
his
resistan ce :
Unit:
gra
m
{ou
nce)
Item
Sliding re
SIstance
(I
f control r
a.c.k
in standstill pump
[ NOTES)
Limit
150
(5
.3)
a)
A control
rack
no
t sliding smoothly could
mean.
that
tappets or c
ont
rol sleeves
are
in
bad condition.
Check
\hese parts caref
uUy
when taking \hem o
ut
in disassembly.
b)
Move \he control rack
aU
t
he
way
in
each
direc
tion,
an
d note
the
position of
ea
ch
control
pinion
for
the
ext
reme
positions
or
the
ra
ck
. "Restore \hese positions at the
tbne
of
re
assembly.
(d) Isolate rhe four tappets from the
cam'
by
ho
lding lhem in lifted condilion.
Thi,
is
accom·
plished
by
turning the carmhaft by hand to
raise each
lappet
10
the highest position and
locking \he
lappel
in
\hat position wi th a tappet
inser
t.
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