SECTION
3:
Pre-Service
Inspection
PTO
HORSE
MODEL
TECHNICAL
MANUAL
Page
3-1
4/90
WARNING:
When
servicing
the
machine,
prevent
uninten-
tional
starting
of
the
engine
by
disconnecting
the
spark
plug
wire
and
keeping
the
wire
away
from
the
spark
plug.
Place
the
engine
throttle
control
in
the
OFF
position
and
shift
the
Wheels/Tines/PTa
Drive
Lever
into
NEUTRAL.
,
Before
you
begin
your
repair
or
maintenance procedure
take a
moment
to
perform a
pre-service inspection
of
the
following transmission parts.
In
doing
so, you may dis-
cover additional problems
that can be corrected while
the tiller is in
your
shop.
Wheel Shaft - Inspect the wheel
shaft for movement and oil leaks:
• Grasp the tiller's handlebars and
tilt the tiller forward so its weight
is resting entirely on the wheels
and move the tiller side-to-side.
See Figure 3-1.
Figure
3-1:
Pre-Disassembly
Inspection
of
the
Wheel Shaft.
If the tiller moves more than .015"
from side-to-side on the wheel
shaft, it indicates that the wheel
shaft needs either
to
be shimmed
or
that one
or
both
of
the snap
rings has become dislodged from
the snap ring groove(s).
• If oil is leaking from around one
or
both of the wheel shaft oil seals,
replace the oil seal(s) and deter-
mine
why
the oil seal(s) failed.
PTO Power Unit Drive Shaft
Pulley -
Check the PTO drive shaft
pulley (see Figure 3-2) for end play
and oil leaks:
Drive Shaft
Pulley
Figure
3-2:
Pre-Disassembly
Inspection
of
the
Drive
Shaft
Pulley.
• Using
two
hands, grasp the drive
shaft pulley and pull it in and
out
to
check
for
end play.
There should be .005" to .010" play.
If the drive shaft pulley has more
play, the bolt that holds the pulley
may need
to
be tightened. This bolt
should be tightened to
170
inch/lbs.
If tightening does
not
reduce the
play, the PTO power unit drive
shaft needs to be shimmed.
• Look for oil leaks around the
pulley. If you see oil, make sure
that it did
not
come from the neu-
tral plunger on the housing cover;
this
is
an oil relief point.
If you suspect
an
oil leak from
around the pulley, inspect the fol-
lowing:
a.
The bolts holding the front
bearing cap may
not
be suffi-
ciently tightened.
b.
The
washers on the bolts that
hold the front bearing cap may be
worn
or
the bolts may not have
been coated with non-hardening
gasket sealer.
c.
The
front bearing cap gasket
may have failed.
d.
The
front drive shaft oil seal
may have failed; find
out
why.
Tiller Attachment -
Tip
the tiller
so that you have a full view
of
the
tiller attachment (see Figure 3-3).
Then check the following:
• Inspect the area around the
rear bearing cap
for
oil leaks. If
you see an oil leak, inspect the
following:
HOUSING COVER
GASKET
Figure
3-3:
Pre-Disassembly
Inspection
of
the
Tiller
Attachment.
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