Gravely 915034 - ZT1640 Owner's/Operator's Manual page 17

LEVEL AND ADJUST PITCH OF
MOWER DECK
Adjust on a level surface, with the tires inflated
to the correct air pressure (see Specifications
on page 26).
Level Mower Deck
1. Install adjustment pin (item 1) in the
fourth adjustment hole (item 3)
(figure 15).
1
3
1. Adjustment Pin
2. Mower Lift
Pedal
Figure 15
2. Rotate the right and left mower blades
(item 2) until the ends of both mower
blades are facing rearward (figure 16).
NOTE: The rear blade cutting height (item 6)
should be 2-7/8 to 3 in. (7.3 to 7.6 cm) from
rear edge of mower blades to the ground on
both blades (figure 16).
IMPORTANT: The distance from rear edge of
mower blades to the ground MUST NOT
exceed 3 in. (7.6 cm) (figure 16).
Mower Deck Shown
From The Side
6
1. Mower Deck
2. Mower Blade
3. Front of Mower
Deck
Figure 16
3. Measure from rear edge of mower blades
to the ground (figure 16).
4. Perform steps 5 through 7 if the
measurement is too high or too low on
either side of mower deck.
2
3. Fourth
Adjustment
Hole
OE0060
1
2
5
4. Front Blade
Cutting Height
5. Ground
6. Rear Blade
Cutting Height
OE0010
5. Remove rear lift link (item 8) and rear
trunnion (item 9) from mower deck
(item 1) and mower lift (item 2)
(figure 14).
• TO RAISE the mower deck, turn rear
trunnion (item 9) clockwise several
turns.
• TO LOWER the mower deck, turn rear
trunnion (item 9) counterclockwise
several turns.
6. Install rear trunnion (item 9) and rear lift
link (item 8) on mower deck (item 1) and
mower lift (item 2) (figure 14).
7. Check that the mower deck is level:
a.Rotate right and left mower blades to
face side-to-side.
b. Measure outer edge of mower blades
to ground. Measurement must be
within 1/4 inch (6.35 mm).
• If mower deck is not level, repeat steps 5
and 6.
• If mower deck is level, record the
distance from rear edge of mower
blades to the ground and then adjust
pitch of mower deck.
Adjust Pitch of Mower Deck
IMPORTANT: The mower blade end used to
level the mower deck must be used to adjust
the pitch of the mower deck.
1. Rotate the right and left mower blades
180 degrees until the end of the mower
blade that was used to level the mower
deck is facing forward (figure 16).
NOTE: The front blade cutting height (item 4)
should be 1/16 - 1/4 in. (1.59 - 6.35 mm) lower
than the rear blade cutting height (item 6)
3
(figure 16).
2. Measure from front edge of right and left
mower blades to the ground.
3. Subtract front blade cutting height
(item 4) measurement from rear blade
cutting height (item 6) measurement
4
(figure 16).
4. Perform steps 5 through 7 if the front
blade cutting height (item 4) is too high or
too low on either side on either side of
mower deck.
5. Remove front lift link (item 5) and front
trunnion (item 7) from mower deck
(item 1) and mower lift (item 2)
(figure 14).
• TO RAISE the mower deck, turn front
trunnion (item 7) clockwise several
turns.
• TO LOWER the mower deck, turn front
trunnion (item 7) counterclockwise
several turns.
GB - 17