Troy-Bilt 12090 Owner's Manual page 40

Section5: Maintenance
_ efore inspecting, cleaning or servicingthe machine, shut off engine, wait for all moving parts to come I
to a complete stop, disconnectspark plug wire and move wire away from spark plug. Remove ignition I
key, if so equipped.
Fa ure to fo ow these nstructons can resu t n ser ous persona njuryor propertydamage.
Single Tine Replacement
The tines or tine hood edges may be
sharp. Wear thick gloves to protect
your handsfrom cutsor scrapes.
1. Move the Wheels/Tines/PTODrive
Lever to NEUTRAL,the Wheel Speed
Lever to either FASTor SLOWposition,
and the Tines/PTO Clutch Lever to
ENGAGE.
2. Gently tilt the tiller forward until the
engine rests on the ground.
3. Raisethe hood flap at the back of the
tiller and tie it up with string.
4. Beforeremoving a tine, note in which
direction the bent tip points. The new tine
must be installed in the same direction.
5. Usetwo 9/16" wrenchesto remove the
two bolts and nuts securing the fine to the
tine holder plate (Figure5-32). Use pene-
trating oil on the hardware if it is rusted or
hard to remove.
Figure 5-32: Removing a single tine
requires taking off lwo bolts and
lwo nuts.
6. Mount the newfine exactly the way the
old tinewas positioned. (Thesharp edge
of the fine, which enters the soil first, must
face forward when abovethe tine shaft.)
Replacethe bolts and nuts and tighten
them securely.
Removingand ReplacingA Tine
HolderAssembly
• The tines or tine hood edges may be
sharp. Wear thick gloves to protect
your hands.
• Wear safety goggles to protect your
eyes. When loosening hardware, do
not hit a wrenchwith a metal tool- this
could shatter the tool or wrench,
sendingmetal particles into your eyes.
The 16 Bolo Tines are mounted eight per
side on left-side and right-side fine
holders - on either Style A or Style B
holders (refer to Figures 5-33 and 5-34 to
see which style tine holder you have).
Style A tines holders are secured to the
fine shaft with two bolts and two
nuts. Style B tines holders are
secured with a single end bolt to
the left and right sides of the tine
shaft. Here's how to replacethe
tines and holders as assemblies.
RemovingTine HolderAssembly
1. Follow steps 1-through-3 in
Single TineReplacementabove.
2. Identify the tine holders as
Style A or Style B, then as left-
side and right-side holders - they
must be replaced on the same
side from which they were
removed. Use a piece of chalk or
a greasepencil to mark them L and
R.
3. With Style A holders, remove the
two bolts and nuts securing each
holder (Figure5-33). With Style B
holders, remove the single bolt
(along with the washers) from the
end of the fine shaft (Figure 5-34).
4. Use a soft mallet to drive the holder
off the tine shaft. (Use a heavy hammer
and block of wood to knock off the immo-
bilized tine holder.)
5. When the holder is off, clean all dirt
and debris from the shaft and the holder.
Apply fresh grease to the fine shaft.
Replacing TinesHolder Assembly
1. Replacethe holder so the sharp tine
edges face forward (toward front of tiller)=
Tapfine holder back on thefine shaft.
2. Greasethe threads on the mounting
bolt(s). Installand tighten the bolt(s)
securely=
Non-Tapered Tine Shaft
Right-Side
Tine Holder
Left-Side
Tine Holder
Figure 5.33: Style "A" Tine Holders.
Right-Side
Tine Holder
Left-Side
Tine Holder
49 Figure 5.34: Style "B" Tine Holders.