MTD 111-638A - Manual (Page 14)

A
FIGURE 26.
C. Reassembly
Before reassembling the blade and the blade
adapter to the unit, iubricate the engine
crankshaft and the inner surface of the blade
adapter with light oil. Lubricating the bolt holes,
bolts and inner surface of the nuts with light oil is
also recommended. A 4 oz. plastic bottle of light
oil lubricant is avaiiable. Order part number
737-0170. Engine oil may also be used.
When replacing the blade, be sure to install the
blade with the side of the blade marked “Bottom”
(or with part number) facing the ground when the
mower is in the operating position. Make certain
key is in place on the crankshaft.
Blade Mounting Torque
3/8" Dia. Bolt 375 in. lb. min., 450 in. lb. max.
5/16" Dia. Bolt 150 in. lb. min., 250 in. lb. max.
To insure safe operation of your unit, ALL nuts
and bolts must be checked periodically for correct
tightness.
DECK
The underside of the mower deck should be
cleaned after each period of use as grass clip­
pings, leaves, dirt and other matter will ac­
cumulate. This accumulation of grass clippings,
etc., is undesirable as it will invite rust and corro­
sion and may cause an uneven discharge of grass
clippings at the next cutting.
The deck may be cleaned by tilting the mower for­
ward or on its side and scraping clean with a
suitable tool or by washing with a stream of water
from a garden hose.
CAUTION
Do not direct the stream of water at
a hot engine as damage to the
engine may result. Be sure spark
plug wire is disconnected.
ENGINE OIL
CHECK OIL LEVEL before starting engine and
after every 5 hours of operation.
ADD oil as necessary to keep level full to full mark
on dipstick.
Engine should be in a level position when check­
ing oil.
CHANGE OIL after first 5 hours of operation.
Thereafter change every 25 hours. Change oil
while engine is warm. Oil may be drained thru
drain on bottom of engine. To drain completely,
always place engine level when draining thru the
bottom. Oil capacity 1-1/4 pints. See figure 27.
FIGURE 27.
AIR CLEANER
CLEAN AIR CLEANER and re-oil element every 25
hours under normal conditions. Clean every few
hours under extremely dusty conditions. Poor
engine performance and flooding usually in­
dicates that the air cleaner should be serviced.
See figure 28.
1. Snap off the top cover.
a. WASH foam element in kerosene or a liq­
uid detergent and water to remove dirt.
b. DRY foam completely by wrapping and
squeezing in a cloth.
c. SOAK foam with engine oil. Squeeze to
distribute and remove excess oil.
2. Reassemble foam element and cover.
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