29
Shear Bolts
Shear
bolts
are
built
to
break
under
shock
loads
on
the
fan
or
auger.
However
under
certain
circumstances
this
security
is
not
adequate.
Example:
a
sudden
high
impact
shock
on
the
fan
may,
in
some
cases
break
the
fan
shaft
without
breaking
the
shear
bolt.
If
the
shear
bolt
breaks,
make
sure
to
always
replace
it
with
the
same
grade
of
bolt
(grade
5
for
PTO
series
20-40-50-60
,
and
grade
8
for
PTO
series
80
)
it
is
necessary
to
always
maintain
this
bolt
very
tight
in
order
to
keep
the
efficiency
of
the
shearing
mechanism.
Warning:
The
gearbox
shafts
are
made
with
special
alloy
steel.
However
they
are
case
hardened
to
increase
capacity
to
shock
load.
These
shafts
cannot
be
broken
under
normal
loads.
However
undesirable
objects
may
enter
the
fan
and
either
bend
or
break
the
gearbox
shaft.
It
is
understood
that
the
gearbox
cannot
be
built
to
resist
every
poss
i
ble
overload
and
consequently,
gearbox
fan
shafts
will
not
be
replaced
under
warranty.
Therefore
the
user
of
the
snowblower
must
be
very
careful.
Maximum length of PTO shaft
Warning:
Telescopic tubes of PTO should overlap a minimum length to meet ideal
conditions for transmitting power.
Following table could be used as a guide to find maximum permissible length of PTO.
PTO Description
Over-all length
Closed
Over-all length
Opened Max
Telescopic tube
overlap
T20-056P
29 3/4"
41"
5"
T40-056P
30 1/2"
40 1/2"
6"
T50-071P
36 1/2"
51 1/4"
7"
T60-071P
37 3/4"
511/4"
7"
T80-066P
36"
47 1/4"
7"
T80-076P
40 1/2"
53"
8"
T90-071P
39"
51"
8"
Содержание Meteor 54
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Страница 23: ...23...
Страница 26: ...26 PTO Installation Instructions for Snowblower...
Страница 30: ...30 Effective PTO Drive Shaft Maintenance...
Страница 36: ...NOTES 36...
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