The transmission
in
MITSUBISHI MT160(D)
and MT
I80(D)
is
of
selective sliding shift type,
designed
to
give
three
forward speeds and one
reverse speed
on
each
of
the
two
ranges, HIGH
and
LOW.
Thus, a
total
of
six forward speeds
and
two
reverse speeds are available.
There are two PTOs in this transmission. One
is
called the mid-PTO (for driving
front
wheels)
and the
other
is
called the main PTO
(for
driving
an
implement such
as
the rotary).
The main PTO provides three speeds. Its
output
shaft
is
of
an SAE standard type, 1-3/8"
in nominal size and having 6 splines.
Transmission gears, shafts and shift mecha-
nisms are in the
front
section, and differential
gealing and spiral bevel gear drive, complete
with differential lock, are in
the
rear section
of
the transmission case.
The spiral bevel gear (crown gear)
is
integral
with the differential case. The differential lock
device, designed compact and taking
but
a small
inside space,
is
controlled from a pedal located
on the right
of
the transmission case.
TRANSM
ISSION SYSTEM
To
both
right and left sides
of
the
rear
of
the
transmission case are fitted an aluminum-alloy
case in which a final reduction gearing, complete
with a brake,
is
housed. The two cases are built
sturdy.
The shift mechanism and the hydraulic
control
devire for the working implement are
located in the
top
of
the transmission case.
Transmission lubrication and hydraulic control
(for the implement) share the oil: the oil in the
transmission case is used also by the hydraulic
control system, and
is
prescribed
to
be a gear oil
of
SAE
#80
for standard weather condition.
(The viscosity rating
of
this oil must be changed
for seasonal changes.)
The main PTO
is
equipped
with
an overrun-
ning clutch to prevent reverse flow
of
drive
into
the transmission from the working im pIe men
t.
Because
of
this clutch, there are
not
such operat-
ing difficulties
as
"gear grating" in shifting and
"tractor
refusing to
halt"
(even with the main
clutch released), when the
tractor
is
working
with, say, the single blade
rotary
mower
hitched
to
it.
5-1
To Next Page
Loading...
Need help?
General
