Gravely 424 - Page 52

Low
Adiustmer*
Move
the
jam
nuts
(D,
Figure
39) closer
to the clutch
lever Jor
a
more sensitive
qdiustment
or closer
to the
end of
the clutch
rod
(C)lor
a Iess sensitiye
adjustment.
Adjust the
jam
nuts
(E)
so
that
wlen the lever
is
in
the
low
or
(l)
position, there
is
approximately
.010 inch
gap between
the coils
of the spring.
In case
of
improper
high-low
plarretary
operation,
and before assuming
inter:ral
problems, carefully check
the
following:
1. Check
linleage
for binding, sheared
keys, broken cotter
pins
or missing clevis
pin:.
2.
Check to see
that control
arm and
lever
assembly are
no1 binding on
the eross shalt
weldment.
3.
Check
to see
that
the needle bearing
in the
high-low
clutclr link
is not fiozen to
the front
clutch
actuating
shaft.
4.
Check bolts
and nuts securing
the frarne
to the
chassis
for tightness.
Torque to
65 ft. Ibs.
When
internat
problems are indicaled,
a few simple
checks
will
quickly locate
the area
of Jailure.
If
the tractor
does not
move
when Jorrvard-reverse
lever
is
engaged,
check
to
see that
the srviftamatic
{range)
linkage
k
working
properly. Check
for
sheared
keys or rollpins.
Check
to see
if
brales
are frozen or rusted
to
drums.
To
locate the
problem;
using
a
light,
observe
the transmission through
the oil
fller
plug
hole.
Engage
the
highJow
geer,
then
vhile
walching the front
pin
plate,
move the
forward-reve:se
lever
back and
forth. If
the
planetary turns to
the right
and left,
the
problem is
in the di$erential. If
it does
not
turn, the
problem
is
the
planetaries or a broken
pinion
shaft.
To
determine
planetary
or
pinion shaft
failure, engage
?TO and
high-low
gear.
If
the ?TO
shalt
turns, then
the Jorward-reverse
planetary has
failed. If the PTO shaft
does not
turn, the
high-lou,
planetary
has
failed or
the
pinion shalt is
broken.
It
is
necessa:y to remove
the eagine
to
determine
if it is a
high-low
planetary failure or a broken
pbion
shaft.
lnternal highJow
planetary
(1-2
Cear)
problems
wr:uld be indicated
jf
there
js
no
bound linlage or sheared
keys
and the
control levers
are engaged
and PTO does
not turn or tractor
x'heetl do not
turn.
To examine the
high-low
planetary:
1.
Semove engine
as described
on
page 26,
2. Remove
the
clutch
lever from
the actuating
shaft.
3. Turn
the actuating
shaft
to
release clulch
slide
rods.
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,ftt
5e
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frft.
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Low
PLANTTAPY
51
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