Bolo Tine Maintenance - Troy-Bilt 12090 Owner's Manual

Section5: Maintenance
Before inspecting, cleaning or servicingthe machine, shut off engine, wait for all movingparts 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 njury or propertydamage.
AdJusting Reverse Drive:
1. PlaceWheels/Tines/PTODrive Lever in
FORWARDposition.
2. On left side of tiller, put a 1/2" wrench
on the plunger retaining bolt and another
1/2" wrenchon thejam nut next to it
(Figure 5-27). While holding the bolt
steady, loosen thejam nut (counterclock-
wise) until it touchesthe bolt head.
Figure 5.27: Hold bolt steady while
loosening or tightening jam nut.
7. Placea chalk or pencil mark on the top
edge of the plunger retaining bolt. Now,
whilewatchingthe mark, loosen the bolt
3/4-turn (Figure 5-29). Do not exceeda
3/4 turn (this would disengagethe bolt
from the locking groove in the side of the
plunger).
Figure 5-28: Loosen jam nut before
turning reverse adjustment bolt.
Bolo Tine Maintenance
Checking Tines for Wear
Inspectthe tinesfor wearor damage after
every 30 operating hours. The rate of
weardepends upon hours of use and soil
conditions. With use, the tinesget
shorter, narrower and more pointed
(Figure 5-30). If badly worn, theylose the
ability to till deeply.
3. Turn the bolt in until it tightens against
the plunger inside the spring, The bolt
must be tight to prevent plunger from
turning - but be careful not to overtighten
and break the bolt.
4. Placea 7/8" wrench on the head of the
reverse adjustment bolt and a 9/16"
wrench on thejam nut below it (Figure 5-
28), Hold the bolt steady while loosening
thejam nut three or four turns.
5. Move the Wheels/Tines/PTODrive
Leverto NEUTRAL. The switch body on
the bottom of the engine mount tab
(Figure 5-24) should be resting squarely
on top of the reverse adjustment bolt, and
the reverse disc should be at least 3/16"
away from the transmission drive pulley.
If the reverse disc is any closer than this,
raise the reverse adjustment bolt (turn it
counterclockwise).
6. Check that reverse disc is at least 3/16"
away from transmission drive pulley,
Then hold reverse adjustment bolt steady
with one wrench while tighteningjam nut
with a second wrench (Figure 5-28).
8. Hold the plunger retaining bolt steady
with a wrenchwhiletightening thejam
nut against the side of the plunger housing
(Figure5-27),
Figure 5-29: Loosen plunger
retaining bolt about 314.turn, then
tighten jam nut against plunger
housing.
9. Checkthe action of the reversedisc as
explainedpreviously.
IMPORTANT: If the above adjustments
have not corrected an improperly working
reverse drive, contact an authorized
dealer or Factory Technical Service
Department for assistance.
Figure 5-30: Check for wear
every 30 operating hours.
Worn tines leavean ever-increasing gap
in the middle of a tilled row. The normal
gap is 3" between the tine tips - replace
the tines when the gap widens to 5"
(Figure 5-31),
......... iiii . ..... i ...
Figure5.31: Replace tines when gap
between inner tines is 5" or more
(normal gap is 3").
Tines can be replaced individually or as a
complete set. See replacement instruc-
tions that follow.
39