Check Safety Interlock System; Check Parking Brake; Check Engine Oil; Check Tire Pressure - Gravely ZT HD Operator's Manual

Figure 22
Figure 23
IMPORTANT: Reconnect spark plug wires
after maintenance.
CHECK SAFETY INTERLOCK
SYSTEM
Check function of the Safety Interlock System
by performing the tests below. Contact your
Gravely dealer for repair if any of the tests
fail.
Test Steering
Levers
1 Neutral
2 Forward,
Neutral,
Reverse
3 Forward,
Neutral,
Reverse
Operating Interlock (Engine On)
4 * Forward,
Neutral,
Reverse
5 * Forward,
Neutral,
Reverse
* When operator lifts off seat.

CHECK PARKING BRAKE

1. Place unit in service position. See
Service Position on page 20.
2. Bypass transaxles. See Move Unit
Manually on page 18.
3. Push unit forward.
• If unit does not move forward, no further
action is needed.
• If unit easily moves forward, adjust the
brake lever. Refer to your unit's Service
Manual.

CHECK ENGINE OIL

NOTICE: Engine oil level must be maintained
at correct level or engine damage may occur.
Refer to engine manual.

CHECK TIRE PRESSURE

See Specifications on page 30 for
recommended tire pressure.
EN - 21
PTO Parking
Brake
Starting Interlock
Off On
On On or
Off
On Off
or
Off
On On or
Off
On Off
or
Off
Result
Engine
starts.
Engine does
not start.
Engine does
not start.
Engine
shuts off.
Engine
shuts off.