Troy-Bilt 21AE682W766 Operator's Manual page 16

3. After cleaning away any debris and removing
old grease, apply fresh grease to the wheel
shaft before re-installing the wheels.
Hardware
Check for loose or missing hardware every ten
(10) operating hours. Failure to tighten or replace
fasteners can cause poor performance, equipment
damage or oil leakage. Most hardware on your tiller
is visible. Pay particular attention to hardware listed
below.
Transmission Pulley Mounting Bolt
• If the washer behind the bolt head is loose, the
bolt needs tightening. To do this, first insert a
punch or thick screwdriver into the hole next
to the bolt and wedge the tool against the side
of the motor mount casting. This immobilizes
the pulley while you tighten the bolt. See
Figure 5-1.
Figure 5-1
Neutral Plunger Assembly Jam Nut
• The jam nut is located on the left side of the
neutral plunger. If loose, immobilize bolt head
with one wrench and use another wrench to
tighten the nut. See Figure 5-2.
Figure 5-2
16 S 5 — S
ection ervice
Rear Bearing Cap Screws
• The three rear bearing cap screws are located
under the depth regulator mounting bracket.
If any are loose, it can cause an oil leak or drive
shaft end play. See Figure 5-3.
Cap Screw
Swing Bolt
Housing Cover Bolts
• Check the five bolts securing the tiller housing
cover to the left side of the transmission.
Gear oil can leak from a loose housing cover.
To reach the bolts, remove the left side tine
Mounting Bolt
holder. See Tine Replacement in the Service
section.
Swing Bolts
• Check both of the swing-bolts that connect
the power unit transmission to the tine
attachment. Both bolts should be checked
every 2-1⁄2 hours of operation. If loose, wear
can occur on the locating pin on the power
unit, and cause enlargement of the locating
hole in the tine attachment. Using a torque
wrench, tighten these bolts to 70-to-80 ft.-lbs.
Lock Nut on the Shifting Linkage
• Check the locknut that fastens the shifting
linkage to the eccentric shifting lever. See
Figure 5-3. Do not tighten the locknut against
the eccentric lever. It should be very close to,
but not touching the lever.
Tine Hardware
• Check the four bolts and nuts securing left and
right tine holders to the tine shaft. See Figure
5-4.
Jam Nut
Bolt
Eccentric Lever
Lock Nut
Power Unit
Transmission
Figure 5-3
Tine Hardware
Figure 5-4
Transmission Gear Oil
Checking for oil leaks
• At 25-hour operation intervals, check the tiller
for oil leaks. Inspect for oil accumulations on
the tiller or the floor where it is stored.
• A small amount of oil seepage or wetness
around a shaft opening or cover is no cause
for alarm. But a heavy concentration of oil
is more serious. You should tighten all bolts
immediately, and replace any worn seals or
gaskets.
• It may be impossible to determine how
much oil has been lost, so check the oil
levels in the PTO transmission and the tine
attachment before using the tiller again. Add
any necessary gear oil. Serious damage to
the transmission components can result from
operation when gear oil levels are low.
• If tilling during very hot weather, the gear oil may
heat up and expand inside the transmissions.
To allow for this oil expansion, both the power
unit transmission and the tine attachment
transmissions have oil relief vents. See Figure 5-5.
Oil Vents
Figure 5-5
• The vents allow small amounts of oil to seep
out.
• If a serious leak is discovered, please contact
your authorized dealer or the TROY-BILT
Technical Service Department for service
advice.
Checking Gear Oil Levels
Every 30 hours of operation, check the gear oil level
in both the power unit transmission and the tine
attachment transmission. Operating them while
low on gear oil — even briefly — can cause serious
damage to internal components.
1. The transmissions must be cool, since hot gear
oil expands and gives a false reading.
2. The power unit transmission and the tine
attachment transmission must be connected
when checking — or adding — gear oil.
3. Move the tiller to level ground. Move the
Depth Regulator up so the tines rest on the
ground.