Troy-Bilt 8 HP - Manual (Page 42)

C. Adding or changing gear
oil
For small top-offs (a few ounces
or less), use SAE140, SAE 85W-140
orSAE 80W-90 weight gear oil with
an API rating of either GL-3 or
GL-5. For full gear-oil replacement,
use SAE 140 orSAE85W-140 gear
oil with an API rating of GL-3 only.
(Your tillertransmission was filled
with SAE 140 weight gear oil at the
factory.)
IMPORTANT
Do not use automatic trans­
mission fluid or engine oil in the
transmission. These lubricants
are too light for transmission use.
The gear oil does not require
regular changing. Do so only if you
know, or suspect, that it has be­
come contaminated with dirt,
sand, or metal particles.
Gear oil should be available at
well-stocked service stations, out­
door power equipment stores, or
farm or heavy equipment service
centers. The power unit transmis­
sion holds approximately 60
ounces; the tine attachment holds
approximately 16 ounces.
To add oil to the Power Unit
transmission:
1. Follow steps 1 and 2 of “To
check the Power Unit oil level.”
2. Using a %-inch wrench or
socket, remove the bolt that se­
cures the handlebar base to the
top of the transmission (before
removing the bolt, support the
handlebars with one hand to pre­
vent them from falling on the tine
hood). Unplug the Forward In­
terlock wire harness receptacle at
the bottom of the handlebars and
gently set the handlebars aside
(avoid getting dirt on the wire
harness, the mounting bolt, or the
handlebar base). The hole in the
top of the transmission is the gear
oil fill hole. See Photo 6-10.
3. Using a clean funnel, slowly
pour fresh gear oil into the trans­
mission. Stop pouring the gear oil
when it begins to flow out of the oil
level check hole on the left side of
the transmission (see Photo 6-6).
4. Reinstall the oil level check plug
and tighten it securely.
5. Reinstall the handlebars and
tighten the mounting bolt securely.
Make certain that the handlebars
are pointing straight backwards,
and are not angled to one side.
6. Reconnect the Forward Inter­
lock wire harness, making sure
that the connection is tight and
secure.
7. Test operation of Forward Inter­
lock Safety System. See page 17.
'.4
-It
ft-.-
^
^
6-10: Remove handlebar base to add
gear oil.
To drain the Power Unit
transmission:
1. Place a shallow pan beneath the
transmission gear oil drain plug
(Photo 6-11).
2. Use a %-inch wrench to remove
the oil level check plug (see Photo
6-6). This vents the transmission
and speeds up draining.
3. Use the same wrench to remove
the drain plug. The gear oil will
drain slowly, so be patient. After
about two quarts has drained,
gently tilt the tiller forward so that
the oil will drain from the rear of
the transmission.
6-11: Remove oil drain plug.
4. After all the gear oil has drained,
clean the threads of the oil drain
plug, apply a non-hardening gas­
ket sealant to the threads and
reinstall the plug.
5. Leave the oil level check plug off
if you are going to immediately refill
the transmission. If not, replace
the check plug for safekeeping.
6. Be certain to refill the transmis­
sion with gear oil before operating
the tiller again.
To add oil to the Tine Attachment
transmission:
1. Select the correct depth regula­
tor lever setting:
(a) If filling an empty transmission,
raise the Depth Regulator Lever
until the tines are on theground.
(b) If you are topping off the gear
oil level, move the Depth Regu­
lator Lever all the way down
until it is engaged in its highest
notch.
2. Remove the dipstick from the
tine attachment, after first clean­
ing the area around the dipstick so
that no debris wi 11 fal I i nto the
transmission (see Photo 6-7).
3. Using a clean funnel, slowly
pour oil into the transmission. Add
just Vj-ounce at a time, to avoid
overfilling the transmission.
4. Take dipstick readings fre­
quently (see Steps 6 and 7 of “To
Check the Tine Attachment Oil
Level”). When the oil reaches the
“Cold” range marking on the dip­
stick, stop pouring. Replace the
dipstick securely.
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