Height Adjustment; Checking The Adjustment - Craftsman 138.37670 Operator's Manual

CUTTING
HEIGHT ADJUSTMENT
See Figure 11.
• Use the roller assembly to adjust the cutting height
of the mower to four positions, from 1- 2 inches (2.6 -
5.1 cm).
• For the highest cutting level, move the adjustment
knobs to position A as shown in Fig. 11.
• For the lowest cutting level, move the adjustment
knobs to position B as shown in Fig. 11.
• Set intermediate cutting heights by moving the
adjustment knobs to one of the two stops between
highest and lowest positions.
For best performance, align the edge of the cutting
b(ades to overlap the previously cut path. This wi((
ensure no grass is missed during the process.
NOTE: Do not use wheels as a reference point for
grass cut line.
MOWER BLADE ADJUSTMENTS
See Figure 12.
_k WARNING!
Blades are extremely sharp.
To avoid injury, do not touch b(ades when making
adjustments.
NOTE: Blades are factory adjusted.
• Misalignment can occur, often caused by blades
being too loose or too tight. This can cause an
uneven cut or difficulty pushing the mower.
• Each end of the cutting bar is adjusted separately.
• To move the cutting bar closer to the blades turn
the adjustment screw clockwise. To move the cutting
bar away from the blades turn the adjustment screw
counterclockwise.
• When the space equals the thickness of paper (0.12
mm), insert a piece of paper between the blades and
the cutting bar, and slowly turn the wheel by hand.
• The reel should cut the paper evenly at every point.
If not, it is necessary to readjust the cutting action.
i_k CAUTION!
Adjusting the screws for blade
adjustments is a very sensitive procedure. A sixteenth
of a turn is considered a major adjustment. Before
tightening one adjustment screw, make sure to loosen
the opposite screw an equal amount.
CHECKING THE ADJUSTMENT
See Figure 13.
• Turn mower upside down.
• Insert a piece of paper between cutting bar and reel
blades, and slowly turn wheel by hand.
• Each blade should cut across the paper in a
continuous line. If there are missed spots in the cut, it
is necessary to make further adjustments. See Mower
Blade Adjustments.
_k CAUTION!
Do not overtighten adjustment
screws, as this could damage cutting bar. Both
screws must be tight on final adjustment.
8 -- English