Troy-Bilt TUFFY CRT 640C Operator's Manual page 18

WARNING:
Beforeinspecting, cleaning or servicing the machine,shut off engine, wait for all
moving parts to come to a complete stop, disconnect spark plug wire and move wire away from
spark plug. Failureto follow these instructions can result in serious personal injury or property
damage.
4. Thegear oil level is correct if the gear oil
is approximately halfway upthe side of the
main drive shaft.
5. If the gear oil level is low, add gear oil as
described next. If the gear oil level is okay,
securely replacethe oil fill plug.
IMPORTANT:Donot operatethe tiller if the
gear oil level is low. Doing so will result in
severe damageto the transmission com-
ponents.
Figure 5-2: Remove oil fill p/ug (,4) to check
gear oil level and to addgear oil. Remove
four coverscrews (B) to drain gear oil.
6. If adding only a few ounces of gear oil,
use API rated GL-4 or GL-5 gear oil having
a viscosity of SAE 140, SAE85W-140 or
SAE 80W-90. If refilling an empty trans-
mission, useonly GL-4 gear oil having a
viscosity of SAE 85W-140 or SAE 140.
IMPORTANT:Do not use automatic trans-
mission fluid or motor oil in the transmis-
sion.
7. While checking frequently to avoid over-
filling, slowly add gear oil into the oil fill
hole until it reachesthe halfway point on
the drive shaft.
8. Securely replacethe oil fill plug.
B. To Drain theTransmissionGear Oil:
Thetransmission gear oil does not need to
be changed unless it has been contaminat-
ed 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 below.
WARNING:
Gasolineis
highly flammable and its vapors
are explosive. Follow these
safety practices to prevent
personal injury or property
damagefrom fire or explosion.
Allow the engine and muffler to cool
for at least two minutes before drain-
ing the Uller's gasolinetank.
Do not allow open flames, sparks,
matchesor smoking in the area.
Wipe away spills and pushtiller 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 vaporscould reach an open flame
or spark, orwhere ignitionsourcesare
present (such as hot water and space
heaters, furnaces, clothes dryers,
stoves, electric motors, etc.)
2. Drain the oil from the engine.
3. Removefour screws (B, Figure5-2) and
removetransmissioncover and gasket.
4. Removethe 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. Reinstall the wheel.
7. Install a new gasket (do not reuse old
gasket) and reinstall the transmission cov-
er.
8. Refill the transmission using GL-4 gear
oil (SAE 85W-140 or SAE 140).
9. Refill the engine with motor oil and re-
plenish the fuel tank with gasoline.
BOLO TINES
The bolo tines will wear with useand
should be inspected at the beginning of
eachtilling seasonand after every 30 oper-
ating hours. The tines can be replacedei-
ther individually or as a complete set. See
the Parts List pagesfor tine identification
and part numbers.
A. Tine Inspection:
With use, the tines will become shorter,
narrower and pointed. Badlyworn tines
will result in a loss of tilling depth, and re-
duced effectiveness when chopping up
and turning under organic matter.
B. Removin_nstalling a Single Tine:
1. With the engine shut off and the spark
plug wire disconnected, remove the two
screws (A, Figure5-3)and nuts (B)that at-
tach a single tine to a tine holder. If needed,
usepenetrating oil on the nuts.
2. When installing a single tine, be sure to
position it so that its cutting edge (sharp)
will enter the soil first as the tiller moves
forward.
C. Removin_nstalling 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. Re-
move the screw (C, Figure5-3) and lock-
nut (D)that secure the tine assembly to the
tine shaft. If necessary,usea rubber mallet
to tap the tine assembly outward off the
shaft.
3. Before reinstalling the tine assembly,in-
spectthe tine shaft for rust, rough spots or
burrs. Lightly file or sand, as needed. Ap-
ply a thin coat of greaseto the shaft.
4. Install each tine assembly so that the
cutting (sharp) edge of the tines wifl enter
thesoil first when the tifler moves forward.
Securethe tine assembly to the tine shaft
using the screw and Iocknut
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