Datsun 1000 Workshop Manual page 79

6 STALL TEST
Aittomatic Tran mi
ion
C 7
SELECTOR
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LEVER BRACKET
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SCREW
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SPRING
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The stall
test
is
performed
in I
low
2
intermediate
D
drive
and
R reverse
range
at full
throttle
to
check
engine
performance converter
clutch
operation
or
installation and
the holding ability of
the
forward clutch
reverse
clutch and low band
NOTE
While perfonning
this
test do not
hoid
the throttle
at
full
op
ning for
more than
ten
seconds
at a
time
Prior
to
carrying
out
the
tests bring
the
engine
and
transmission to
nonnal operating
temperature
by
placing
the transmission
in P
park
arid
running
for several
minutes
I
Check
the transmission oil
engine
oil and radiator
Top
up
where
necessary
2
Chock
all
wheels
and
apply
the
parking
brake
firmly
3 Connect the
tachometer to
the
engine
and moun t
tre
tachometer
where it is
plainly
visible
from
the
driver
5
seat
4 Mark the tachometer
at 1700
rpm 1
100
rpm
on
the dial
5
Apply
the foot
brake and shift
the selector
lever
to
I 2 D and R
r
ges
successively
and
at
ach
range
press
the accelerator
pedal gradually
and
note
the
engine speed
rpm
When the accelerator
pedal
is
fully compressed
the
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engine speed
will become
cons tant
and
this speed
is
called
the stall
point at
which the
engine
speed should be
noted
The speed
should
be ihe
same
in
all
ranges
and shoold be
between 1950 and 2000 rpm
NOTE
Having
tested
one
range and
prior
to
testing
the
next
range
place
the transmission in Nand
nm at
approximately
1200
rpm
for
one or
two
minutes
to
cool
the
torque converter
oil
6 If the stall
point
is
the
same
in each
range
but
below the
specified
rpm
the following
defects may be
present a
The
engine output
is
inadequate Check the
throttle
valve in the
carburettor for
full
throttle
opening
in
relation
to
accelerator
pedal
movement b The
stator
one
way
clutch may be slipping in the converter
7 When
the
stall
point
exceeds
the specified
figure
band
or
clutch
slippage
is
apparent
depending
on
the
range
selected
8
Excessive
engine speed
in I 2
and
D
indicate
that
the
rear
clutch is slipping
9 Excessive
engine speed
in 2
and D and normal
rpm
in 1
the
one
way clutch is
slipping
10
Excessive
engine speed
in R only
indicates that
the front clutch
or
low
and
reverse
brake is
slipping
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LEVER
BUSH
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T Co
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TBAR
TRUNNION
Exploded
View of the Automatic Gear
Change
linkage
1200 Model
79