Check Tire Pressure; Check Mower Blades - Gravely Pro-Turn 400 Series Operator's Manual

Purge Hydraulic System
Purge air from hydraulic system after draining
oil or changing the filter.
WARNING: AVOID INJURY.
This adjustment requires
operating the engine. Use
extreme care to avoid contact
with moving parts and hot
surfaces. Be sure rear of unit is
well supported and secure
before starting engine.
1. Park unit facing a wall or chock wheels.
2. Release parking brake.
3. Support unit so drive wheels are off the
ground.
4. Bypass transaxles. See Move Unit
Manually on page 22.
5. Start the engine and slowly move steering
levers forward and backward 5 or 6 times.
6. Stop engine.
7. Turn transaxle bypass valves to operation
position. See Move Unit Manually on
page 22.
8. Start engine.
9. Slowly move steering levers forward and
backward 5 or 6 times.
10. Stop engine, lower unit to ground and
check oil level. Add oil if needed.
11. Repeat steps 1 – 10 until transaxles
operate smoothly in forward and reverse
at normal speed without excessive noise.

CHECK TIRE PRESSURE

Check and adjust tire pressure. See
Specifications on page 45.
WARNING: AVOID INJURY.
Explosive separation of tire and
rim parts is possible.
• DO NOT inflate tires above
maximum pressure on tire
sidewalls.
• DO NOT inflate tires with a
compressor; use a hand
pump.
• DO NOT stand in front of tire
assembly when inflating. Use
a clip-on chuck and extension
hose long enough to allow you
to stand to one side.
• DO NOT mount a tire without
proper equipment and
experience.

CHECK MOWER BLADES

Check blades for wear. Replace or sharpen
as needed.
CAUTION: AVOID INJURY. Use
sturdy gloves or padding to
protect hands when working with
mower blades.
Rotation of one blade rotates the
other blades.
Remove Blades
1. Place unit in service position. See
Service Position on page 23.
2. Disconnect spark plug wires.
See Figure 29.
3. Remove hardware retaining blades and
lower spindle guards to spindle and
remove parts. Retain all parts for
reinstallation.
4. Clean all grass, dirt and debris from
upper and lower spindle guards.
3
1. Mower Blade
2. Lower Spindle Guard
3. Upper Spindle Guard
EN - 26
2
1
Figure 29