Gravely Pro-Master 260 Owner's/Operator's Manual page 28

1. Link Chain
2. Mower Mounting Arm
3. Mower lift Arm
Figure 14
LEVELING THE MOWER DECK
These adjustments should be made on a
level surface with the tires inflated to the
correct air pressure.
Check Blade Level and Pitch
1. Raise mower deck to a 3" (7.62 cm)
cutting height.
2. Shut off engine. Engage parking brake.
Remove the ignition key.
3. Turn the blades so the blade ends point
left to right across the width of the deck.
4. Measure the distance between the
ground and cutting edge of the blade on
the left blade (Left position in figure 15)
and on the right blade (Right position in
figure 15). Distances should be within
3/16" (4.7 mm). If they are not, raise the
low side of the deck using the height
adjusters on the deck lift brackets (see
figure 16).
5. After deck is level side to side, check the
deck front to back pitch.
6. Turn the blades so the blade ends point
front to back as shown in figure 15.
7. Measure the distance between the
ground and the cutting edge of the
middle blade at the front of the deck
(Front position in figure 15) and between
the ground the cutting edge of the left
and right blades at the rear of the deck
(Rear position in figure 15).
8. The cutting edge at the front of the deck
(Front position in figure 15) should be
1/8" (3.18 mm) lower than the cutting
edges at the rear of the deck (Rear
position in figure 15).
3
1
2
9. If measurements are out of range, raise
the low side of the deck using the height
adjusters on the deck lift brackets
(figure 16). Be sure to raise the deck
evenly to keep the deck level side to
side.
NOTICE: 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.
Blade Side-to-Side Level
Left
Blade Front-to-Back Pitch
Rear
Adjust Blade Height
(Figure 16)
Level and pitch the mower with the height
adjusters on each deck lift bracket.
1. Loosen the jam nut on the deck lift
bracket bolt about quarter turn to reduce
clamp load on the height adjusters.
2. 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 both jam nuts.
EN - 28
Front
Rear
Figure 15
Right