MTD 112-530A - Manual (Page 11)

C. Reassembly
Before reassembling the blade and the blade
adapter to the unit, lubricate the spindle 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 available.
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 blade spindle.
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. ib. max.
To insure safe operation of your unit, ALL nuts
and bolts must be checked periodically for correct
tightness.
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 indicates that
the air cleaner should be serviced. See figure 17.
To service air cleaner:
1. Remove screw.
2. Remove air cleaner carefully to prevent dirt
from entering carburetor.
3. Take air cleaner apart and clean.
a. WASH foam element in kerosene or a liq­
uid detergent and water to remove dirt.
b. DRY foam completeiy by wrapping and
squeezing in a cloth.
c. SOAK foam with engine oil. Squeeze to
distribute and remove excess oil.
4. Reassemble parts and fasten to carburetor.
DECK
The underside of mower deck should be cleaned
after each period of use as grass clippings, leaves,
dirt and other matter will accumulate. This ac­
cumulation of grass clippings, etc., is undesirable
as it will invite rust and corrosion 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.
A
CAUTION
Do not direct the stream of water at
a hot engine as damage to the
engine may result.
ENGINE OIL
Check oil level before starting engine and after
every 5 hours of operation or each period of use.
Add oil as necessary to keep level FULLTO POINT
OF OVERFLOWING. Before removing oil fill plug,
clean area around plug to prevent dirt from enter­
ing oil fill hole. Engine should be in a level posi­
tion when checking oil.
Change oil after first 5 hours of operation.
Thereafter change every 25 hours. Change oil
while engine is warm. Oil may be drained from oil
drain by tipping unit on its side. See figure 10. Oil
capacity 13/4 pints.
Assemble
Stud O"® o* These
Low Points^^^^
Towards>^^$.S;S^^P“P
Narrow
Edge of
'Element
Screen
Assemble Element So
Lip Extends Over Edge
of Air Cleaner Body
Lip Wiil Form
Protective Seai
When Cover Is
Assembled
FIGURE 17.
SPARK PLUG
The spark plug should be cleaned (see figure 18)
and the gap reset to a 0.030-inch clearance once a
season (see figure 19). Spark plug replacement is
recommended at the start of each mowing
season; check engine manual for correct plug
type.
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