BASIC ADJUSTMENT GUIDE
FOR
THE U.S.A.- 1
(Speed Controller
Adjustment)
Plug in
the
connector from
the
speed controller
to
the
7.2V
Ni
-Cad
bauery
and
operate
your
raio. While adjusting,
the
wheel of
car
may
s
tart
to
run.
so
keep
your
model upon a small box to make
the
wheels
aloof from
the
gr
ound.
Forward
0
Wh
en
the
notches
arc
aligned,
the
controller
is
set
for
the
neutrality.
:-<eutral
(Top
View)
By
turning
th
e ball end.
adjust
the
speed controller to
the
position
shown in
the
drawing
above
(motor stopped position) with
cont
rol
stick
and
the
trim lever in neutral.
<D
High Speed Adjustme
nt
When
the
con
tr
ol stick on your radio is pushed forward all
the
way,
the
co
ntr
oller should be activated and the m
otor
should
run
at
a high
speed.
By
the
motor sound, you can te
ll
il the mot
or
is running high.
medium. or low speed.
Low Speed Medium Speed lligh Speed
Forward
®Reverse
Adjustment
Pu
ll
the
controlstick and
cont
rol
horn
should operate
as
illustrated
in
the
diagram below.
The
m
oto
r should
run
in reverse.
0 R
everse
Servo Horn
/ (Bi
gger
one)
~~=
,
~=~==
~
,
=
-
~~~~
0\ 0
If the movement described in
<D
and
®
are
notachicved, replace
the
servo
horn
with a bigger one,
(Toe-in
Adjustment)
Proper
toe-
in adjustment is necessary
if
the
U.S.A.- I is expected to
perform properly and
drive
in a
straight
line without any wandering
tendencies.
I . I .
\
I . I • -
..>
(St
eer
ing Adjustment)
I
I~
,c)-
-...
I
~
·
~~
' . .
-
~4'
-
Q
'...::~
'ft
~
..
Rotate
th
e ball ends in or
out
to
the
desired length.
Adjust
the
toe-in
angle or the
wheels with
the
ball links to
achieve approximately I degree
toe-in.
To
check wheel alignm
ent
put
the
truck
on a box to allow
whe
els
to move freely.
Th
en ope
rat
e
the
throtll
e and steering controls
and
make any adjustments.
Wheels may not move
il
the truck is
~tatior1ary.
on
the
ground.
Wheels
turn
opposite
each other.
*
Do
not
run
the
U.S
.A.-
I for long periods of time in the slower
speeds
or
in reverse
as
this may cause overheating damage to
the speed control resistor.
MAINTENANCE
OF
ROTARY
SPEED
CONTROLLER
(Checking Speed Co
ntr
o
ll
er)
<!)
Check
10
sec
II
the
ce
nter
nut
or
the
lead fixing
nuts
arc
not loosen.
®Chec
k 10 see il
the
lead
cords
do
not
rub
against
the
rotor
or
the
center
nut
when
the
speed controller
is in operation. as a result
the
points
on
the
controller
may be
out
of contact.
@Or the lead may come in
contact
with
the
body and
causing
the
same
tr
ouble
as
stated
above in
<%>.
®Check to see if
the
speed control rod does not
rub
against a lead fixing nul.
Lead Fixing Nul
-19-
There
should be
enough distance.
Rotor
There
should
be
en<>u
llh
di
s
tan
ce.
(Maintenan
ce
)
<!)Re
move
the
cen
ter
nul
from time to
tim
e I
to check
to
see il
anything
in the controlle
r.
Clean it, if any. I
(%)Ma
ke
it
a rule to check all points Irom
<D
to ®
(C
hecking Speed Controller) , before
running
the
car.
*
If
you notice
the
motor running
intermiuenlly
or
unsmoothly,
examin those f
our
checking points.
If you find n
othin
g defective, the
cont
roller may be worn ou
t.
(I
n such a case.
the
su
rface or the
co
ntr
oller
pl
ate becomes rough,)