GB - 24
TROUBLESHOOTING
PROBLEM PROBABLE CAUSE CORRECTION
Engine will
not
crank/start.
1. Safety interlock system is not
engaged or is faulty.
1. Check safety interlock system (see
Safety Interlock System on page 9).
2. Fuel tanks empty. 2. Fill fuel tanks (see Filling The Fuel
Tanks on page 11).
3.
Fuel shut-off valve closed. 3. Open fuel shut-off valve.
4. Discharged battery. 4. Charge battery (see Charging the
Battery on page 20).
5. Poor connection between battery and
battery cables.
5. Tighten battery cables and/or clean
battery and battery cables (see
Cleaning Battery and Battery Cables
on page 20).
6. Spark plug wire(s) loose or spark
plug(s) faulty.
6. Connect spark plug wire(s) or replace
spark plug(s). Refer to Engine Manual
for detailed instructions.
7. Faulty electrical system.
7. Contact your
Gravely Dealer.
8. Faulty engine.
8. Contact your
Gravely Dealer.
Engine
runs
rough.
1. Choke engaged. 1. Disengage choke.
2. Air filter cartridge plugged. 2. Clean or replace air filter cartridge.
Refer to Engine Manual for detailed
instructions.
3. Faulty engine.
3. Contact your
Gravely Dealer.
Unit does not
move with
engine
running
when using
steering
levers.
1. The transmission bypass lever is
engaged.
1. Disengage transmission bypass lever
(see Moving The Unit Manually on
page 12).
2. Faulty hydrostatic belt. 2. Replace hydrostatic belt (see
Hydrostatic Belt Replacement on
page 22).
3. Faulty transmission.
3. Contact your
Gravely Dealer.
PTO or
mower
blades do
not engage
or shuts off.
1. Operator presence switch not
depressed.
1. Depress operator presence switch by
sitting on seat.
2. Faulty operator presence switch.
2. Contact your
Gravely Dealer.
3. Electric clutch connector is loose or
disconnected.
3. Connect the electric clutch connector.
See Hydrostatic Belt Replacement on
page 22 for the electric clutch
connector location.
4. Faulty PTO belt. 4. Replace PTO belt (see PTO Belt
Replacement on page 21).
5. Electric clutch out of adjustment. 5. Adjust electric clutch (see Electric
Clutch Adjustment on page 22).
6. Faulty PTO switch, wires, connectors,
or clutch.
6. Contact your
Gravely Dealer.
Engine
overheats.
1. Engine oil level low. 1. Add engine oil. Refer to Engine
Manual for detailed instructions.
2. Cooling system plugged. 2. Clean cooling system. Refer to Engine
Manual for detailed instructions.
3. Faulty engine.
3. Contact your
Gravely Dealer.
Unit moves
with engine
off and
parking
brake
engaged.
1. The parking brake needs adjustment.
1. Contact your Gravely Dealer.
2. Faulty parking brake.
2. Contact your
Gravely Dealer.
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