Troy-Bilt BRONCO 5 HP - Manual (Page 21)

Section 5: Maintenance
B. To Drain the Transmission Gear Oil:
The transmission gear oil does not need
to be changed unless it has been contam-
inated with dirt, sand or metal particles.
1. Drain gasoline from the fuel tank or
run the engine until the fuel tank is empty.
See “DANGER” statement above.
2. Drain the oil from the engine.
3. Remove the four screws (B, Figure 5-2)
and washers from the transmission cover
and remove the cover and gasket.
4. Remove the left-side wheel.
5. Tilt the left-side wheel shaft into a
drain pan and allow the gear oil to drain
through the top of the transmission.
6. After draining the oil, reinstall the
wheel, install a new gasket cover (do not
reuse old gasket) and reinstall the trans-
mission cover.
7. Refill the transmission using GL-4
transmission gear oil (SAE 85W-140 or
SAE 140).
8. Refill the engine with motor oil and
replenish the fuel tank with gasoline.
BOLO TINES
The bolo tines will wear with use and they
should be inspected at the beginning of
each tilling season and after every 30
operating hours. The tines can be
replaced individually or as a complete set.
See the separate Parts Catalog for tine
identification and ordering information.
A. Tine Inspection:
With use, the tines will become shorter,
narrower and pointed. Badly worn tines
will result in a loss of tilling depth and
reduced effectiveness when chopping up
and turning under organic matter.
B. Removing a Single Tine:
1. With the engine shut off and the spark
plug wire disconnected, remove the two
screws (A, Figure 5-3) and locknuts (B)
that attach a single tine to the tine holder.
If needed, use penetrating oil to help free
the nuts.
2. When installing a single tine, be sure to
position it so that its cutting edge will
enter the soil first as the tiller moves
forward.
C. Removing a Tine Assembly:
1. A tine assembly consists of eight tines
mounted on a tine holder.
2. If removing both tine assemblies, mark
them “left” and “right” before removal.
Remove the screw (C, Figure 5-3) and
locknut (D) that secure the tine assembly
to the tine shaft. If necessary, use a
rubber mallet to tap the tine assembly
outward off the shaft.
3. Before reinstalling the tine assembly,
inspect the tine shaft for rust, rough
spots or burrs and file or sand as needed.
Apply a thin coat of grease to the shaft.
4. Install each tine assembly so that the
cutting edge of the tines will enter the
soil first when the tiller moves forward.
Secure the tine assembly to the tine shaft
using the screw and locknut previously
removed.
Figure 5-2: Remove oil fill plug (A) to check
gear oil level and to add gear oil. Remove
four cover screws (B) to drain gear oil.
WARNING
Before inspecting, cleaning or servicing the unit, shut off engine, wait for all
parts to come to a complete stop, disconnect spark plug wire and move wire away from spark
plug. Failure to follow these instructions can result in serious personal injury or
property damage.
A
B
B
DANGER
Gasoline is highly flammable
and its vapors are explosive.
Follow these safety practices
to prevent personal injury or
property damage from fire or
explosion.
• Allow the engine and
muffler to cool for at least two
minutes before draining the
tiller’s gasoline tank.
• Do not allow open flames,
sparks, matches or smoking
in the area.
• Wipe away spills and push
tiller away from spilled fuel.
• Use only an approved fuel
container and store it safely
out of the reach of children.
• Do not store gasoline in an
area where its vapors could
reach an open flame or spark,
or where ignition sources are
present (such as hot water
and space heaters, furnaces,
clothes dryers, stoves,
electric motors, etc.)
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