Bolens TMO-37478A - Manual (Page 15)

FIGURE 21.
When sharpening the blade, follow the original angle
of grind as a guide. It is extremely important that each
cutting edge receives an equal amount of grinding to
prevent an unbalanced blade. An unbalanced blade will
cause excessive vibration when rotating at high speeds,
may cause damage to the mower and could break,
causing personal injury.
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.
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.
Blade Mounting Torque
Make certain that the center bolt which secures the
blade brake/clutch and the two hex nuts which secure
the blade are tightened to between 350 inch pounds
(minimum) and 600 inch pounds (maximum).
To insure safe operation of your unit, all nuts and bolts
must be checked periodically for correct tightness.
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 accumulation 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 and
scraping clean with a suitable tool or by washing with
a stream of water from a garden hose.
NOTE
ENGINE
Refer to the separate engine manual for all engine
maintenance instructions.
Maintain engine oil as instructed in the separate
engine manual packed with your unit. Read and follow
instructions carefully.
Service air cleaner every 25 hours under norma! con­
ditions. Clean every few hours under extremely dusty
conditions. Poor engine performance and flooding
usually indicates that the air cleaner should be ser­
viced. To service the air cleaner, refer to the separate
engine manual packed with your unit.
The spark plug should be cleaned and the gap reset
once a season. Spark plug replacement is recom­
mended at the start of each mowing season; check
engine manual for correct plug type and gap specifi­
cations.
Clean the engine regularly with a cloth or brush. Keep
the cooling system (blower housing area) clean to per­
mit proper air circulation which is essential to engine
performance and life. Be certain to remove all grass,
dirt and combustible debris from muffler area.
BLADE BRAKE/CLUTCH
This unit is equipped with a blade brake/clutch. If for
some reason the blade brake/clutch becomes in­
operative, it is suggested that all repair work on the
blade brake/clutch should be performed by an author­
ized service dealer. The unit should be inspected by
an authorized service dealer if any of the following con­
ditions are noticed.
1. Frayed clutch control cable.
2. Leaking oil seal (oil collection on the floor during
mower storage).
3. Extensive vibration of the unit.
Do not direct the stream of water at a
hot engine as damage to the engine
may result.
BELT REMOVAL AND REPLACEMENT
1. Disconnect the spark plug wire and ground it
against the engine.
2. Drain the fuel tank or place a piece of plastic
beneath the cap to prevent gasoline leakage.
3. First remove the grass bag, discharge chute and
catcher panel.
4. Remove the transmission belt cover by removing
three bolts. Loosen the transmission belt auard
See figure 22.
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