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Injection
pump test
ing nnd adjustmen
t
A dies.el engine
C
at\1lot
g
ive the
full
performance
it
should be capable
of
even
if
it
were
in
its best ope
rable
condition
,
unless
the
injection
pump
and
govern
or
serving
it
arC
equaUy
In beSot
condition.
The
foUowing
testing
and
adjusting,
instructions
are fo
r
making
sure
thjit
the pump
is
in such
a
condition
and
must
be
carried
out
with utmost
care
.
lns1
ructions
all
the
governor
will
be
given
sep~
r
a
te
ly
in
the subsequent sect ion
.
The
tests
and
adjustme
nts, set
forth
un
de
r
three
head·
ings,
presupposes
the
use
of special
servicmg
equipmen
t
-
the
injection
pump tester.
It
should
be
bo
rne in
mimI
that
the pump
and
its
govern
or
constitu
te
an
insepra
ble
set
and
must
be tested
and
adj
uste
d to
meet
the
specified
cri
teria
before
installing
them
on
the engine.
(I) Preparntion
(a)
Mount
the reassemble<! inj<ction pump on the
tester.
Setting up
tne pump on
the
tester
(b)
Attach ilie
rack
position me asure.
Remove
from
the governor these
parts:
maximum s.peed
stop-
per,
stop
adj
usting
screw,
idling sp ring) torque
sprinS and
adaptor spring. Push
in
the
control
rack toward the
gO
\ltmor
side
as far as
it
will
go,
an
d
set the rack
POSitiO
D
measure (95904-
01
060)
at
the
storting
position
(zero
ntm)
.
......-. -~
Sen
ing ra
ck
measu re at
O-mn'l pOSition
MAI NT
ENANCE AN
D
A DJUSTMENT
(c)
Bleed
ai,
out
of
the injection
pump,
as
follows:
Filst
, moye the
se'ector
lever of the pump
tester
into
"
injec
ti
on
"
pOSi
tion
an
d
tum on the
motor
swit
ch
to
slart
up
the
mot
or.
Next,
produce
(he
prescribed
delivery
presslJ
re
by meanS o
f the
pressu re
adjusting
valve
.
Loosen
tho
air
bleeder
S(;rew
on
the
pump
to let
out
th
e
trapped
air
,
If
any.
[NOTE
]
It
is
not
necessary to "
run"
the
pump
in
order
to
bJee
d
air
o
ut.
Ai
r bleedi ng
The
pump
is
n oW
ready
rOT
these
operations:
CONTROL RACK SLIDING RESISTANCE
TES!',
INJECTION TIMING
ADJUSTht£NT,
and
INJECTION QUANTITY
ADJUSTMENT.
(2)
Control
ruck
sliding
,..istance
test
R
un
the
pump
at 100
0 rpm
and
me ..
ure
the
resIstance with the hand spring
balancer.
The
control
rack
should be capable
of
slid ing
without
offerin
g any
resistance
greater than
50
grams (
1.8
ounces).
Checking
rack
slI
d
ing resistance
69
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