Gravely 988100, Owner'S/Operator'S Manual

Page: 10 / 28

GB-10
CONTROLS AND FEATURES
See Figure 5 for controls and features locations.
SAFETY INTERLOCK SYSTEM
Check Safety Interlock System
Test the safety interlock system at each operation. If the
system does not function properly, do not operate the unit
until repairs are made.
The engine will only start with the PTO disengaged. Pistol
grip models must have the shift lever in neutral for engine to
start.
988100, 102, 103, 110, 112
Engine must not start unless PTO is disengaged and the
shift lever is in neutral. To test:
1. With engine off, engage PTO.
2. Turn electric start model ignition switch to Start. Engine
must not crank.
Turn recoil start model ignition switch to On. Pull recoil
start handle. Engine must not start.
3. Disengage PTO.
The engine MUST stop whenever the operator removes
both hands from controls while the PTO or transmission is
engaged. To test:
1. Start engine and engage PTO.
2. Release operator presence control lever(s). Engine
must stop.
3. Disengage PTO.
4. Restart engine.
5. Place shift lever in Forward.
6. Release operator presence control lever. Engine must
stop.
988114, 115, 118, 119, 313
Blades must not rotate unless the operator presence control
levers and PTO are engaged. To Test:
1. With engine on, release operator presence controls
and engage PTO.
2. Blades must not rotate.
3. Disengage PTO.
The blades MUST stop whenever the operator removes both
hands from controls while the PTO is engaged. To test:
1. Start engine and engage PTO.
2. Release operator presence control lever(s). Blades
must stop.
NOTE: All motion must stop whenever operator releases
control levers.
Operator Presence Control (988100, 102, 103, 110,
112)
The operator presence control lever must be depressed to
operate the PTO or traction drive. When the shift lever or
PTO is engaged, releasing the operator presence control
lever stops the engine.
Operator Presence Control
(988114, 115, 118, 119, 313)
The operator presence control levers must be depressed to
operate the PTO. When the PTO is engaged, releasing the
operator presence control levers stops the mower blades.
Steering Levers (988100, 102, 103, 110, 112)
The steering levers are used to steer, operate in forward and
reverse, and stop the unit. When held in neutral, the brakes
are engaged.
Steering Lever Latches (988100, 102, 103, 110, 112)
The steering lever latches hold the steering levers in neutral
and apply the brakes.
OPERATION
WARNING: AVOID INJURY. Read and
understand the entire Safety section before
proceeding.
DANGER: SAFETY INTERLOCK SYSTEM
FAILURE and improper operation of unit can
result in death or serious injury. ALWAYS know
the safety interlock system is operating
properly. See Check Safety Interlock System on
page 10 for testing instructions.
CAUTION: AVOID INJURY. Operate only when
operator presence control is functioning
correctly. See Check Safety Interlock System on
page 10 for testing instructions.
WARNING: AVOID INJURY. When the engine is
running and the shift lever is engaged, releasing
only one steering latch causes the unit to circle
around one drive wheel.
ALWAYS hold both steering levers in the neutral
position when releasing the steering lever
latches.
ALWAYS release levers slowly.