Inspection - Troy-Bilt 7 HP Technical Manual

PTO HORSE MODEL
TECHNICAL MANUAL
Page 5-6 4/90
SECTION 5: PTO Power Unit Transmission
5. Insert a 1/4-inch punch
through the right side of the hous-
ing and use a hammer to drive the
stem pinion shaft (5) and the key
(6) to the left and out. Avoid dam-
aging the bearing (7) in the right
side of the housing. The bearing
(7) and washer (8) in the left side
of the housing will be attached to
the pinion shaft. See Figure 5-5.
Note: Be careful not to damage
the shaft or the inside of the
housing.
As you drive the stem pinion shaft
out, try to catch the washer (8)
and shim (4A) in the right side of
the housing on the end of the
Figure 5-4: Pinion Shaft Assembly.
punch. If the washer and shim fall
into the housing, be sure to
remove them so they will not
damage the transmission.
With the stem pinion shaft
removed, the pinion gear cluster
(9-12) can be removed from the
housing.
6. Remove the bearing (7) from
the right side of the housing. If the
bearing does not come out easily,
use a large punch to gently knock
it out.
Note: Be careful to not damage
the inside of the housing.
7. The following parts should not
be disassembled unless inspection
shows them to be worn or
damaged.
8. Use an arbor press to remove
the bearing (7) and washer (8)
from the stem pinion (5). See
Figure
5-5.
9. Use a snap ring pliers to
remove the (external) snap ring (9)
that retains the fast speed pinion
gear (11) to the bronze worm gear
(10).
10. Place the worm gear (10) on
an open vise so that the fast speed
gear (11) is hang ing down
between the vise jaws. Then use a
1-inch diameter bar to tap the fast
speed gear down and off the
worm gear. Check to make sure
the key (12) also came off with the
fast speed gear.
Note: Be careful to not damage
the inside bore of the fast speed
gear.
Inspection
These instructions describe how
to inspect vital parts on the pinion
shaft assembly. In addition to
inspecting the parts you have
removed, you should also inspect
any replacement parts you will
use.
Figure 5-5: Stem Pinion Assembly.