Troubleshooting - Gravely HVZ Owner's/Operator's Manual

PROBLEM
Engine will not
crank/start.
Engine
runs
rough.
Unit does not move with
engine running when
using steering levers.
PTO or mower blades
do not engage or shuts
off.
Engine overheats.

TROUBLESHOOTING

PROBABLE CAUSE
1. Safety interlock system is not engaged or
is faulty.
2. Fuel tank empty.
3. Discharged battery.
4. Poor connection between battery and
battery cables.
5. Spark plug wire(s) loose or spark plug(s)
faulty.
6. Faulty electrical system.
7. Faulty engine.
1. Choke engaged.
2. Air filter cartridge plugged.
3. Faulty engine.
1. The transmission bypass lever is
engaged.
2. Faulty hydrostatic belt.
3. Faulty transmission.
1. Operator presence switch not depressed.
2. Faulty operator presence switch.
3. Electric clutch connector is loose or
disconnected.
4. Faulty PTO belt.
5. Faulty PTO switch, wires, connectors, or
clutch.
1. Engine oil level low.
2. Cooling system plugged.
3. Faulty engine.
1. Check safety interlock system (see Safety
Interlock System on page 10).
2. Fill fuel tank (see FILLING FUEL TANK
on page 11).
3. Charge battery (see Charging the Battery
on page 18).
4. Tighten battery cables and/or clean
battery and battery cables (see Cleaning
Battery and Battery Cables on page 18).
5. Connect spark plug wire(s) or replace
spark plug(s). Refer to Engine Manual for
detailed instructions.
6. Contact your Gravely Dealer.
7. Contact your Gravely Dealer.
1. Disengage choke.
2. Clean or replace air filter cartridge. Refer
to Engine Manual for detailed
instructions.
3. Contact your Gravely Dealer.
1. Disengage transmission bypass lever
(see MOVING UNIT MANUALLY on
page 12).
2. Replace hydrostatic belt (see
REPLACING HYDROSTATIC BELT on
page 20).
3. Contact your Gravely Dealer.
1. Depress operator presence switch by
sitting on seat.
2. Contact your Gravely Dealer.
3. Connect the electric clutch connector.
See REPLACING HYDROSTATIC BELT
on page 20 for the electric clutch
connector location.
4. Replace PTO belt (see REPLACING PTO
BELT on page 19).
5. Contact your Gravely Dealer.
1. Add engine oil. Refer to Engine Manual
for detailed instructions.
2. Clean cooling system. Refer to Engine
Manual for detailed instructions.
3. Contact your Gravely Dealer.
GB - 21
CORRECTION