Gravely 988100-GR1336FX - Manual (Page 15)

GB - 15
• To move straight forward, slowly push control
levers forward.
• To stop unit motion, allow control levers to return
to neutral.
• To turn to the left, push the right hand control
lever forward.
• To turn to the right, push the left hand control
lever forward.
To move in reverse:
1. Allow control levers to return to neutral.
2. Move shift lever to Reverse.
3. Pull up slowly on the lower control levers.
To mow:
1. Move the shift lever to set a slow ground speed.
2. Move the throttle lever to the fast position.
3. Engage operator presence control(s).
NOTE: Operator presence control must remain
engaged.
4. Move the PTO switch to On to engage mower.
IMPORTANT: NEVER engage the PTO if the mower is
plugged with grass or other material. This will damage
the PTO belt.
5. Push control levers forward slowly.
When you know how to operate the unit, select a speed
appropriate to your mowing conditions.
To stop mowing:
1. Allow control levers to return to neutral.
2. Move the throttle lever to 1/2 speed.
3. Turn off PTO switch.
4. Move shift lever to the neutral position.
CUTTING HEIGHT ADJUSTMENT
Fixed Decks (988100, 101, 102, 110, 112, 114,
115, 118, 119, 313)
1. Shut off the unit. See Shut Off on page 13 and
"To stop mowing."
2. Lift deck by handle until mower lock pins can be
pulled out of holes.
3. Turn latches slightly so they can’t snap back into
place.
4. Set deck to desired cutting height (Figure 5).
5. Place mower lock pins into desired hole.
IMPORTANT: Make sure lock pins are fully engaged.
6. Repeat adjustment for other side of deck.
Floating Decks (988103, 104)
1. Shut off the unit. See Shut Off on page 13 and
"To stop mowing."
2. Lift deck by handle until hair pins can be removed
from height adjustment rods.
3. Set deck to desired cutting height (Figure 6).
4. Insert hair pins into appropriate holes on height
adjusting rods.
5. Repeat adjustment for other side of deck.
WARNING: Uncontrolled reverse travel can
result in serious injury.
Do not put shift lever into the reverse
position unless you are prepared to operate
in reverse.
OG1600
OG1610
OG1630
OG1640
OG1660
1 (25)
(38) 1.5
2 (51)
3 (76)
4 (102)
(64) 2.5
(90) 3.5
Inches (mm)
Figure 5
OG1380
Fixed Deck Cutting Heights