Troy-Bilt 8 HP - Manual (Page 52)

Tire and wheel maintenance
The air pressure in the tires
should be checked after every 30
operating hours. The recom ­
m ended air pressure for tilling is
10 to 20 psi (pounds per square
inch).
U se a pocket-type tire gauge to
ensure that both tires are equally
inflated. If the air pressures are not
equal, it can cause the tiller to pull
to one side.
K eep the tires free of gasoline or
011 w hich can destroy the rubber.
N O TE: W hen installing bar tread
tires, m ake sure that the “V ”
shaped treads are facing forw ard,
in the direction of the engine.
Removing the wheels
A
WARNING
To help avoid personal injury, stop
the engine, rem ove the electric
start key, disconnect the spark
plug w ire, and let the engine and
m uffler cool before rem oving or
replacing the w heels.
E ach w heel is held in place by a
roll (spirol) pin that secures the
w heel hub to the w heel shaft. S im ­
ply drive out the roll pin to rem ove
a w heel, as explained below .
1. U sing a sturdy block, prop up
the transm ission until the w heels
are an inch or tw o off the ground.
2. To prevent the w heels from turn­
ing, place the W heel Speed Lever
in either the “S LO W ” or “FA S T”
w heel speed gear.
3. U se either a 3/16-inch tapered
drift pin, a 1/4-inch untapered drift
pin, ora 16-penny(16d) nail w ith
a blunted point, to drive the roll pin
dow n through the w heel hub
(P hoto 6-46).
A
WARNING
W ear safety goggles to protect
your eyes from the possibility of
flying m etal fragm ents w hen driv­
ing the roll pin into or out of the
w heel hub.
4.
If the w heel doesn’t slide easily
off the shaft, squirt som e penetrat­
ing oil around the shaft and w heel
hub and tap the tire to set up vibra­
tions w hich w ill help to distribute
the oil. B e patient and allow suffi­
cient tim e for the oil to soak in.
5. B efore installing the w heel, ap­
ply a thin coating of grease to the
w heel shaft. Then, install the
w heel and align the roll pin holes
by inserting your drift pin or nail
from underneath (P hoto 6-47). U se
a ham m er to tap in the roll pin
flush w ith the w heel hub.
N O TE: If a roll pin is loose, you can
hold it in place w ith an autom otive
engine hose clam p.
Engine oil maintenance
It is vitally im portant that you use
m otor oil of the proper service
grade and viscosity, and that you
regularly check and change the oil
according to the recom m ended
hours of operation. Incorrect, insuf­
ficient, or dirty oil w ill cause pre­
m ature engine w ear and dam age.
C heck the oil level each tim e
before starting the engine and
after each 5 hours of continuous
operation.
C hange the oil after the first 5
hours of new engine operation.
Thereafter, change the oil after
each 10 operating hours, or m ore
often if operated in extrem ely
dusty or dirty conditions.
N O TE: The engine m anufacturer
recom m ends oil changes after
each 25 operating hours. H ow ever,
please rem em ber that your tiller
w ill nearly alw ays be operating in
dusty or dirty conditions, w hich is
w hy w e recom m end a 10-hour
service schedule.
U se a clean, high-quality deter­
gent m otor oil. The oil should be
rated w ith an S F or SG service
classification (look for those
letters on the container).
The oil sum p capacity for the
B riggs & S tratton engine is approx­
im ately 2% pints; how ever alw ays
add enough oil so that it is to the
point of overflow in the oil filler
tube. For the K ohler E ngine the
capacity is approxim ately 32
ounces; how ever alw ays fill to the
“FU LL” m ark on the dipstick.
A lw ays use the correct viscosity
according to the air tem perature at
the tim e of operation (see chart
that follow s).
A
WARNING
To help avoid personal injury, stop
the engine, rem ove the electric
start key, disconnect the spark
plug w ire, and let the engine and
m uffler cool before checking, add­
ing, or changing engine oil.
6-46: Drive roll pin out to remove
wheel.
6-47; Align holes and tap in roll pin.
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