Unit:
mm (in. 1
Service
Nominal
Standard
limit
ite
m
diameter
Tor
que con·
0.026 -
0.
056
0.10
trollever
8
(0.00102 -
(0.00394)
bU'hing and
(0.315)
0.00220)
supporting
pin
clearance
(5)
Spring inspection
When
(he
govB
mor
is adj
us
ted, check v:uious
springs a
nd
determine
if
they
are defective or
not.
ExpeciaJly at disassemb
ly
, check them
ro
r
bc-nt
,
damag
e,
fa
ti
g
\.l
e
:lnd
rusti
ng.
Check the
co
ntrol
spr
in
g at
il
s ho
ok
pa
rt
, too. Replace springs found
in
abnormal condition.
Governor testing
and
adjustmel'J t
As to
the
meanings
of
various technical terms used in the
foUowing
instructions
re~arding
governor performance
and adjustments,
re
ference must be had
to
the governor
characteristic
cu
rv
es, below. and
to
the
table
or
standard
adjustment d.ua, carried at the end
or
this part.
The procedures which
foUow
assume
thost
the injection
pump ha, been
properly
sel for injection timing and
injection quantity as outlined in (he preceding part, and
that
the
injection
pun,p
unit
(complete
with its go,-,ernor
les
s the adaptor spring and idling spring)
is
set on Ihe
pump lester.
(1)
Govemoradjushnenls
After s
ervi
ci
ng
the
governor,
s.ecuring the pre-
scribed clearances in the various. running patU,
make four adjustments:
adaptor
adjuslmtnl, ma
xi
·
mum-speed
con
trol adjustment, low-speed control
adjustment
and t
orque
sprinS adjustment.
Each.
adjustment
will
be
explained in reference to the
characteristic curves.
(a
l Preparation
Install
the
angular scale plate (protractor) on
the governor housing
to
read the angular posi.
tion
of
the
adjusting leve,. (vertical = 40°)
•
Prot
ra
ctor
on
governor housing
MAINTENANCE
AND ADJUSTMENT
(b)
Maxi
mum-sp.ed
.d
ju
stment
1. Setting the
fuU
·l
oad
stopper
'"
t :
E
§.
g
.~
..
"Ii
..
e '"
]
8
0
Run the inj
ecti
on
pump
at the speed corre·
sponding to
HNc,"
w
ru
ch
is
indicated In Ihe
characterist
ic
curve diagram. Tum the adjusting
le
...
er
in the direction for raising
the
speed: this
tensions the co
ntrol
spring. making t
he
c
ont
rol
rack move inward.
Stop
moving
the
adjusting
lever
when
the rack comes
to
the
positi
on
corre
spon
di
ng
to ""Re"
(~8
.
S
± 0.1
mm
(0.
346
± 0.
004
in.)
],
and secure Ihe adjusting lever
there te
ns
tat
iv
ely. Rack position
"R
c" is
fo
r
maxim
um
in
jection quantity. Bring
th
e fun
-l
o
ad
st
op
per i
nt
o co
nt
ac
t with the tension lever
under
lhis condition.
A d
apto
r sp ring YIeldIng
HJ
thl!"
f)\JSh
b
,
d
~
Adju11ing I_vor
,n
Idllng
position
H.
..
....
f>IINcN:l~
Pump
tpeoad (rpm)
-----
Governor
cnaracteris.tic curves
Setting
fu
ll
·lc>,d
s
to
pper
•
~
c
e
~
e
0
0
1
E
,
E
·x
0
"
"
~
~
B
1
2.
Setting
the
maximum·speed
sto
pper
Slowly raise
the
speed from
"Nc"
to
see
when
the
control
rack
begins
to
wm
e
out
(in the
directi
on
f
or
decreasing inj
ection
quantity).
The
$peed
.t
which Uti, should OCCUi
i,
prescribed
73
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