SHOP MANUAL
34
33
Fig. 119—Exploded Wew
of
gears
and
shafts iocated
in
rear transmission housing
on
Modei L355.
1.
Bearing
2 .Range countershaft
:i Gear
4.
Spacer
5.
Bearing
(5.
Snap ring
7.
Washer
8. Nut
9. Cover
in.
Bearinjj^
11.
Bearinjj^
ease
VZ. Shim
14.
Gear(14-;i7T)
15.
Snap ring
16.
Gear(27T)
17.
Bearings
18.
Bevel pinion shaft
19.
Snap ring
2U G ( 2 ; i T )
()
2\.
Bearing
22.
Retainer
2'^.
Thrust washer
24.
Washer
25.
Needle hearings
^C.
Ge ar (15-2IT )
27.
Bea r i n g
28.
Nut
2i>.
Snap ring
;•!().
Bearing
:{1.
Sleeve
:i2.
Oil seal
Xi. Pto output shaft
'M. Gasket
^^5.
Bearing case
;iB.
Slinger
'M. Cap
To reassemble rear transmission hous-
ing, reverse
the
disassembly procedure
while noting
the
following:
Use a new
nut
(28) on pto
output shaft
and
tighten
to
a
torque
of
150-195
N-m
(110-145
ft.-lbs.).
Stake
nut
after tightening.
Be
sure
oil
groove
of
thrust washers faces
gear (23-Fig.
118 or
26-Fig.
119).
Bevel pinion shaft (18-Fig.
118 or 119)
is available only
as a
matched
set
with
bevel ring gear.
If
renewing shaft
or
bearings, backlash
and
gear mesh must
be checked
and
adjusted when
reassembling
as
outlined
in
paragraphs
95
and 96.
Reinstall bevel pinion shaft
assembly using original shims. Install
a
new
nut (8) and
tighten
to a
torque
of
147-196
N-m
(109-145 ft.-lbs.). Stake
Fig. 120—Location
of
hydrauiic
pressure test ports
on shuttie vaive used
on
Modei L355.
L. Lubricating oil pressure
F. Forward dutch ftressure
K. Reverse clutch pressure
Pararaphs 87-89
nut after tightening.
Be
sure counter-
shaft gear
(3) is
installed with chamfer
facing forward.
SHUTTLE
TRANSMISSION
(Model L355)
87.
A
hydraulically controlled shut-
tle transmission (forward-reverse)
is
used
on all
L355 tractors. Hydraulic
pressure supply from main hydraulic
pump passes through
a
flow priority
valve which directs
a
constant flow
of
oil
to shuttle control valve regardless
of
engine speed. Clutch pressure
and
lubricating
oil
pressure
are
regulated
by
relief valves located
in
shuttle control
valve assembly. Hydraulic shuttle clutch
packs
are
located
in
clutch housing.
SHUTTLE CONTROL VALVE
Model L355
88.
TEST AND ADJUST.
To
check
clutch relief pressure
and
lubricating
oil
pressure, proceed
as
follows: Remove
hood
and
install
a
pressure gage
at
plug
location
"L" (Fig. 120) to
check
lubricating
oil
pressure. Forward clutch
pressure
is
checked
at
port
"F" and
reverse clutch pressure
is
checked
at
port "R".
Be
sure hydraulic
oil is at nor-
mal operating temperature when check-
ing pressure. Operate engine
at
2600
rpm
and
observe lubricating pressure
which should
be
100-195
kPa
(14-28 psi).
Position shuttle control lever
at "For-
ward"
or
"Reverse"
and
check clutch
pressure reading. Clutch pressure relief
setting should
be
1590-1740
kPa
(230-250
psi) in
either direction.
If pressure readings
are not
within
specifications, change thickness
of
shims
(12
or
30-Fig.
121) to
obtain recom-
mended relief pressure. Changing shim
(30) thickness
1.0 mm (0.04
inch) will
change lubricating
oil
pressure approx-
imately
11 kPa (1.5 psi).
Changing
thickness
of
shim (12)
1.0
mm (0.04 inch)
will change clutch relief pressure
ap-
proximately
182 kPa
(26.5
psi).
89.
R&R AND
OVERHAUL.
To
remove shuttle control valve, first
remove steering wheel, instrument
panel
and
fuel tank assembly. Discon-
nect control cable
and
hydraulic supply
pipe from valve. Remove mounting
cap
screws
and
withdraw valve from clutch
housing.
To disassemble shuttle valve, remove
selector cover (24-Fig.
121) and
selec-
tor valve
(20) as a
unit. Remove retain-
ing
nut and
separate selector lever (27),
45
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