GB - 25
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 12).
3.
Fuel shut-off valve closed.
3.
Open fuel shut-off valve.
4.
Discharged battery.
4.
Charge battery (see Charging the
Battery on page 21).
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 23).
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 23 for the
electric clutch connector location.
4.
Faulty PTO belt.
4.
Replace PTO belt (see PTO Belt
Replacement on page 22).
5.
Electric clutch out of adjustment
(915044, 046, 048, 050).
5.
Adjust electric clutch (see Electric
Clutch Adjustment on page 23).
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.
