Tighten Bolts And Nuts; Tiller Lubrication - Troy-Bilt 12090 Owner's Manual

Section5: Maintenance
_ efore inspecting,cleaning or servicingthe machine, shut off engine, wait for all moving parts to come
to a complete stop, disconnectspark plug wire and move wire away from spark plug. Remove ignition
key, if so equipped.
Failure to follow these instructionscanresult in serious personalinjury or propertydamage.
Tighten
Bolts and Nuts
Checkfor loose or missing hardware
every ten (10) operating hours. Failureto
tighten or replacefasteners can cause
poor performance, equipment damageor
oil leakage. See your Parts Catalog for
complete fastener descriptions.
Most hardware on your tiller is visible.
Pay particular attention to hardware
shown in Figures 5-1, 5-2, 5-3 and 5-3A.
I. Checkthe transmission pulley
mounting bolt (Figure 5-I). 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.
2. Checkjam nut on left side of neutral
plunger assembly(Figure5-2). If loose,
immobilize bolt head with one wrench and
use another wrench to tighten the nut.
3. Checkthe three rear bearing cap
screws under the depth regulator
mounting bracket (A, Figure 5-3). If any
is loose, it can cause an oil leakor drive
shaft end play.
4. Checkthe five bolts securing the tiller
housing cover to the left side of the trans-
mission (B in Figure 5-3). Gear oil can
leakfrom a loose housing cover. To
reach the bolts, remove the left side tine
holder. See Bolo TineMaintenancein this
Section for tine holder removal directions.
5. Check both swing-bolts (C, Figure5-3)
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.-Ibs.
6. Checkthe Iocknut that fastens the
shifting linkage to the eccentric shifting
lever (D, Figure5-3). Do not tighten the
Iocknut against the eccentric lever. It
should be very close to, but not touching
the lever.
7. Checkthe four bolts and nuts securing
left and right fine holders to the fine shaft
(Figure 5-3A).
Figure 5-1: Check bolt on transmission pulley.
IMPORTANT: Give screws or bolts that
go into the transmission housing a
coating of non-hardening gasket sealant
to prevent gear oil from leaking.
Tiller Lubrication
Proper lubrication of the tiller's mechani-
cal parts is an essential part of good
maintenance. Lubrication should be done
after every ten (10) hours of operation.
Use ordinary motor oil (#30 weight or
lighter) where oil is specified. Use a
quality greasewith a metal lubricant
where grease is recommended (regular
grease is acceptable). Do not over
lubricate. If there is a build-up of dirt,
remove the build-up and re-apply oil or
grease.
Figure 5-3A: Tine holder hardware
must be tight.
Figure 5-3: Gently tilt tiller forward to check fasteners.
Figure 5-2: Check jam nut on plunger assembly. 31