Wheel Shaft Assembly - Troy-Bilt 7 HP Technical Manual

PTO HORSE MOOEl
TECHNICAL MANUAL
Page 5-8 4/90
SECTION 5: PTO Power Unit Transmission
thickness as the washer (8). Using
a shim that is the same thickness
as the washer will prevent any
warping of the washer.
11. Using a mallet, install a bear-
ing (7) flush with the right side
housing bore. Then use the pinion
bearing retaining plug (2) as a
driver and seat the bearing,
washer, and shim flush against the
fast speed pinion gear.
12. Make sure the fast and slow
speed pinion gears are flush
against the worm gear.
13. Make sure the bearings are
flush against their respective
gears.
14. Line up the spirol pin hole on
the right side retaining plug with
the hole in the housing.
15. Center the worm gear. Use
the drive shaft opening at the front
of the PTa power unit to sight and
center the gear. If the gear is not
centered, tap the appropriate
retaining plug inward until the
gear is centered (hold the oppo-
site plug firmly in place when driv-
ing a plug inward).
16. Repeat the previous two
steps until the war ar is cen-
tered as you vie it hrough the
opening in the fran of the PTa
power unit.
17. With the worm gear centered,
push inward on the two retaining
plugs and check to see if the
spiral holes in the plugs and the
housing are aligned. If a plug is
not seated deeply enough, tap it in
until the holes are aligned. If a
plug is seated too deeply, remove
it and insert one or more shims (4)
until the holes are aligned.
18. Install a-rings (3) on each
plug (2).
19. Use #30 weight oil to lubri-
cate the a-rings and insert the
plugs on each side.
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3
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2
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Figure 5-7: Wheel Shaft Assembly.
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20. Install the spiral pins (1) on
each side.
21. With the wheel drive clutch in
neutral, try to spin the bronze
worm gear. It should turn easily,
driving the two cast iron wheel
gears as it turns. If the gear does
not spin freely, strike the plugs (2)
inward with a rubber hammer.
This should free-up the pinion
shaft assembly. If the gear still
does not spin freely, it is shimmed
too tightly.
\.
Wheel Shaft
Assembly
These instructions describe how
to service the wheel shaft assem-
bly. For instructions on how to
remove the wheel shaft without
disassembling the entire PTa
power unit, see "Removing the
Wheel Shaft Without Disassem-
bling the Transmission" in
Section 7.
Use Figure 5-7 as a reference for
part locations in these instruc-
tions. '