Troubleshooting - Gravely ZT HD 44 Operator's Manual

Problem Probable Cause
Safety Interlock System is not
engaged or is faulty.
Fuel tank is empty.
Fuel supply is contaminated.
Battery is discharged.
Engine does
not start.
Connection between battery and
battery cables is poor.
Spark plug wire(s) are loose or
spark plug(s) are faulty.
Electrical system is faulty.
Engine is faulty.
Choke control knob is in on
position. (Models 991240,
991242, 991244, 991246,
991254, 991256, 991258,
Engine runs
991260, 991262, 991264)
rough.
Air filter cartridge is plugged.
Engine is faulty.
Engine oil level is low.
Engine
Cooling fins are plugged.
overheats.
Engine is faulty.
The transaxles are bypassed.
Unit does not
drive. Transaxle drive belt is faulty.
Transaxles are faulty.
Operator presence switch is not
engaged.
Operator presence switch is
faulty.
PTO
malfunctions.
PTO belt is faulty.
PTO switch, wiring, connectors
or clutch are faulty.
Unit moves Parking brake needs adjustment. Adjust parking brake lever. Refer to your
with engine off
and parking
Parking brake is faulty.
brake engaged.
Tire pressure is incorrect.
Unit does not
drive straight.
Steering levers need adjustment. See Adjust Steering Levers on page 25.

TROUBLESHOOTING

Correction
Check Safety Interlock System. See
Check Safety Interlock System on
page 22.
Fill fuel tank. See Before Operating Unit
on page 17.
Replace with clean fuel.
Charge battery. Refer to your unit's
Service Manual.
Tighten and/or clean battery and battery
cables. See Clean Battery on page 23.
Connect spark plug wire(s) or replace
spark plug(s). Refer to engine manual.
Contact your Gravely dealer.
Contact your Gravely dealer.
Move knob to off position.
Clean or replace air filter cartridge. Refer
to engine manual.
Contact your Gravely dealer.
Add engine oil. Refer to engine manual.
Clean engine. Refer to engine manual.
Contact your Gravely dealer.
Engage levers. See Move Unit Manually
on page 19.
Contact your Gravely dealer.
Contact your Gravely dealer.
Activate switch by sitting on operator
seat.
Contact your Gravely dealer.
Replace belt. Refer to your unit's Service
Manual.
Contact your Gravely dealer.
unit's Service Manual.
Contact your Gravely dealer.
Check tire pressure. See Specifications
on page 32.
EN - 27