GB - 12
TO MOW WITH UNIT
Operate the unit only when seated in the operator’s
position.
1. Start the engine. Let the engine warm until it is
running smoothly.
2. Release parking brake.
3. Move the control levers to the neutral position.
4. Slow the engine down to about 3/4 speed.
5. Move the PTO switch to the “On” position to engage
the mower.
IMPORTANT:
Never engage the PTO if the mower is
plugged with grass or other material. This may cause
damage to the electric clutch.
6. Move throttle control to fast.
7. Move the control levers forward to obtain a slow
ground speed.
8. To disengage the mower, move the PTO switch to the
“Off” position.
9. When you know how to operate the unit, select a
speed appropriate to your mowing conditions.
PARKING
To park the unit:
1. Move the control levers to the neutral position. Turn
off PTO.
2. Move the throttle lever to the “Slow” position.
3. Set the parking brake.
4. Lower the attachment.
5. Turn the ignition key to the “Off” position and remove
the key.
MOVING THE UNIT WITH THE ENGINE OFF
To move the unit without the engine running, rotate the
bypass valve (dump valve) levers located on the pumps
toward the center of the tractor approximately 1/2 turn
using a wrench. Levers must be returned to their original
position in order to operate the unit. (Figure 5)
FOR BEST PERFORMANCE
Cut grass when it is dry.
Keep mower blades sharp.
Keep mower deck properly leveled.
Adjust anti-scalp rollers to prevent scalping.
Do not set height of cut too low. For very tall grass, mow
twice.
Do not travel too fast.
Mow with the engine set at full throttle.
When mulching, only remove 1/3 of grass length per
cutting.
Discharge clippings into areas already cut.
Vary cutting pattern with each mowing.
Do not allow grass or debris to collect inside of mower
deck. Clean after each use.
Gravely Dealers will provide any service which may be
required to keep your unit operating at peak efficiency.
Should engine service be required, it can be obtained
from an Gravely Dealer or the engine manufacturer’s
authorized service center.
SERVICE POSITION
Slide seat completely back. Remove pin holding seat
down on left rear corner. Firmly grasp seat frame handle
and lift past vertical. Lay inverted seat on foot rest. When
service is complete, return seat to upright position and
reinstall pin.
MAINTENANCE SCHEDULE
Proper maintenance can prolong the life of unit. The
following charts show the recommended service
schedule. More frequent service may be required due to
WARNING:
Move the steering control levers
slowly and keep the throttle control lever at slow
speed until you learn how to operate the unit.
1. Left Bypass Valve Lever
2. Right Bypass Valve Lever
Figure 5
1
2
OF1730
Front of unit
MAINTENANCE
WARNING:
AVOID INJURY. Read and
understand
Safety Rules
in
Safety Section
before attempting any maintenance.
