MTD Troy-Bilt 561 21 Inch Self Propelled Electric Rotary Lawn Mower Owners Manual

5
5.
6
The blade can be tested for balance by balancing it
on a round shaft screwdriver. Remove metal from the
heavy side until it balances evenly.
Before reassembling the blade and the blade adapter
to the unit, lubricate the engine crankshaft and the
inner surface of the blade adapter with light oil.
Maintenance
7.
Install the blade adapter on the crankshaft with the
“star” away from the engine. See Figure 5-2. Place
the blade with the side marked “bottom” (or with part
number) facing away from the adapter. Align the blade
bell support over the blade with the tabs in the holes
of the blade and insert the hex bolt.
8.
Tighten the hex bolt to the torque listed below:
Blade Mounting Torque
Center Bolt 450 in. lb. min., 600 in.lb. max.
To insure safe operation of your unit, ALL nuts and bolts
must be checked periodically for correct tightness.
WARNING
Figure 5-2
When removing the
cutting blade or belt,
protect your hands
with a pair of heavy
gloves or use a heavy
rag to hold the blade.
Belt Care
1.
Remove two shoulder screws securing front drive
cover to mower deck. See Figure 5-3. Press inward on
sides of front drive cover and release tabs that secure
it to the height adjuster brackets. Remove drive cover
from mower.
2.
3.
4.
Loosen screw holding belt tension spring to transmis-
sion. See Figure 5-3 inset. Do not remove screw
completely. As you loosen it, tension on the belt will be
released.
Push transmission up a little and slide belt off the
transmission pulley. Lift mower to access belt from
underside of mower. Slide belt off of engine pulley and
around the blade. See Figure 5-4.
Replace with new belt, working around blade. Make
sure belt is firmly seated on engine pulley while pulling
from the other side and sliding it around the transmis-
sion pulley. Tighten screw loosened earlier to secure
belt tension spring to the transmission. Reassemble
front drive cover.
An unbalanced blade
will cause excessive
vibration when rotat-
ing at high speeds. It
may cause damage
to mower, and could
break causing per-
sonal injury.
Figure 5-3
We do not recommend
the use of pressure
washers or garden
hose to clean your
unit. These may cause
damage to electrical
components, spindles,
pulleys, bearings, or
the engine. The use
of water will result in
shortened life and
Figure 5-4
reduce serviceability.
11
Product Specification
CategoriesLawn Mower Manual, MTD Lawn Mower Manuals, Troy-Bilt Lawn Mower Manuals
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- 36 pages
Document TypeOwner's Manual
LanguageEnglish
Product BrandMTD, Lawn Mower
Product TypeWalk Behind Mower
Document File TypePDF
Publishermtdproducts.com
Wikipedia's PageMTD Products
CopyrightAttribution Non-commercial
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