Gravely Rapid XZ Series Owner's Manual page 18

8. Measure the distance between the ground and the
cutting edge of the middle blade at the front of the deck
(Front position in Figure 24) and between the ground
the cutting edge of the left and right blades at the rear
of the deck (Rear position in Figure 24).
9. The cutting edge at the front of the deck (Front position
in Figure 24) should be 1/8 in. (3.18 mm) lower than
the cutting edges at the rear of the deck (Rear position
in Figure 24).
10. If measurements are out of range, raise the low side of
the deck using the height adjusters on the deck lift
brackets (see Figure 26). Be sure to raise the deck
evenly to keep the deck level side to side.
Blade Side-to-Side Level
Left
Blade Front-to-Back Pitch
Rear
NOTE: Pitching the front of the blades lower than the rear
provides a balance between cut quality and the power
needed to cut grass. Certain cutting conditions require the
deck to be pitched with the rear of the blades lower than the
front. Heeling the deck this way requires more engine power
but can provide better cut quality.
11. Adjust the cutting height indicator. Loosen the set
screw and turn the indicator to align the 3 in. (7.62 cm)
mark with the pointer, and then tighten the set screw.
12. Remove the blocks from under the deck.
Front
Rear
Figure 24
1. Cutting Height
Indicator
Right
Adjust Blade Height
Level and pitch the mower with the height adjusters on each
deck lift bracket (Figure 26).
Loosen the jam nut on the deck lift bracket bolt about
1/4 turn to reduce clamp load on the height adjusters.
Loosen the jam nut on the deck adjuster bolt and then
turn the bolt clockwise to raise the deck or
counterclockwise to lower the deck. Tighten the nuts
on the lift bracket bolts.
NOTE: Once the jam nuts on the lift bracket bolts are
tightened, you can remove the height adjuster bolts to
provide more clearance, if needed. Save the adjuster bolts
where they will not get lost.
Height Adjusters
GB - 18
1
2
3
2. Set Screw
3. Pointer
Figure 25
Loosen jam nuts on
the lift bracket bolts.
DO NOT place blocks
under reinforcement bar.
Figure 26