Bolens 139-402A - Manual (Page 10)

NOTE
If the transmission mounting plate
will not slide forward to adjust the
chain tension, it may be necessary
to loosen the four nuts mounting the
transmission to the frame.
FIGURE 15. CHAIN ADJUSTMENT
NOTE
Deck was removed for photographing.
BRAKE ADJUSTMENTS: See figure 16.
To adjust the brake tighten the locknut one-half
turn and then test the brakes.
The brake is located by the right rear wheel inside
the frame.
NOTE
Deck was removed for photographing.
BLADES
Disconnect the spark plug wire and
remove the ignition key before re­
moving the blades.
Sharp and balanced blades are essential for
efficient mowing and long mower and engine life.
When sharpening blades, file equal amounts of
metal from each side. The blades should be
balanced'before they are reinstalled. An unbal­
anced blade will cause excessive vibration and
undue wear on the mower and the engine. When
reassembling, all parts must be installed in the
proper order and fastened securely.
Remove the 3/8” bolt and lockwasher. Pull the
blade and adapter off the mower deck. To remove
the adapter from the blade, remove the two 5/16”
bolts, lockwashers and nuts. See figure 17.
FIGURE 16. BRAKE ADJUSTMENT
FIGURE 17. BLADE REMOVAL
MOWER DECK
The underside of the mower deck should be
cleaned after each period of use as grass
clippings,
leaves, dirt and other matter will
accumulate. This accumulation of grass clip­
pings, etc., is undesirable as it will invite rust and
corrosion and may cause an uneven discharge of
grass clippings at the next mowing.
The deck may be cleaned by tilting the mower on
its front wheels until the frame and the steering
wheel supports the entire unit. Scrape clean with
a suitable tool or by washing with a stream of
water from a garden hose. Be sure to disconnect
the spark plug wire and ground it while performing
this maintenance.
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