Troy-Bilt 1900678 - Manual (Page 25)

HEIGHT OF CUT ADJUSTMENT
The cutting height of your mower has been set at the
factory to the third highest cutting position. This gives
a cutting height of 2-7/8". The cutting height can be
adjusted within a range of 1-5/8" to 3-1/2" (see table
below). To change the cutting height, change the posi­
tion of the rear and front wheels according to the follow­
ing instructions.
height adjustment holes (A, B, C or D) on both sides.
Be sure that the front and rear wheels are located in
the same relative settings (A, B, C or D).
F. Replace the lockwashers and nuts on the front
wheels, and tighten securely.
G. Remove the props from beneath the blade housing.
H. On self-propelled models only, you must readjust
the wheel friction drive rollers to ensure that the
clearance between the rollers and tires is correct
TOOLS NEEDED: 9/16" and 3/4" Wrenches.
A. Prop up both sides of the mower below the blade
housing, high enough to raise all four wheels off the
ground.
B. On self-propelled models only, disconnect the lower
drive control rod by following Step B of the previous
“Adjusting Wheel Drive Traction” instructions.
C. Using a 9/16" wrench, loosen, but do not remove,
the inside and outside flanged lock nuts that secure
the rear wheels in place. See Figure 5-5. Remove the
wheels and replace them in the same corresponding
slots (A, B, C or D) on both sides.
TOOLS NEEDED: Two 9/16" Wrenches.
A. Install the Phillips screw into the alignment holes
on the bellcrank and bellcrank mounting plate and
attach the nut. This aligns the bellcrank. See Photo 5-6.
Photo 5-6: Align bellcrank with screw and nut.
B. Disconnect the upper drive control rod by removing
the spring clip and clevis pin that secures the control
rod clevis to the bellcrank. See Photo 5-7.
Figure 5-5: Wheel height adjustment positions.
D. Position the inside and outside wheel retaining clips
so that the bent legs are against the unslotted edge of
the height adjustment brackets. Then tighten the in­
side and outside flanged lock nuts securely.
E. Using 9/16" and 3/4" wrenches, remove the nut
and lockwasher from each front wheel, leaving the
mounting bolts in place. See Figure 5-5. Remove the
wheels and replace them in the same corresponding Photo 5-7: Disconnect clevis from bellcrank.
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