602223_0609 3-5
cranking. Avoid flooding and operate engine without
choking as soon as possible.
4. Set throttle at approximately 1/2 open position.
5. Insert key in ignition switch and rotate full clockwise to
engage starting motor. Release key when engine starts.
IMPORTANT: The engine starter should not be operated
for periods longer than 30 seconds at a time. An interval of at
least two minutes should be allowed between such cranking
periods to protect the starter from overheating and burn-out.
6. Perform test to make sure safety start interlock system is
operating properly. Refer to Safety start interlock system
section.
7. As soon as engine begins to run, check to make certain
the oil warning light, check engine light and alternator
warning light (if applicable) are off. If not, stop engine
immediately and check for the cause.
8. Allow the engine to idle a few minutes before advancing
the throttle and/or engaging the deck clutch.
Stopping the engine
Use the following procedure to shut off the engine after
operating the equipment.
1. Place the control levers in the park brake position
2. Disengage the deck clutch
3. Throttle back to low idle for a couple of minutes
4. Rotate ignition key counter-clockwise to the “OFF”
position. Remove the key from switch before leaving the
tractor.
Moving tractor with stalled engine
If it becomes necessary to move the tractor when the engine is
inoperative, the hydraulic pumps are equipped with bypass
valves. Before moving the unit, turn bypass valves counter
clockwise one-half to one revolution. The valve stems on each
hydraulic pump are located near the top and are identified as a
hex stud. The valve is located per Figure 3-5.
The steering control levers must be placed in the neutral
position, to release the park brakes, so that the tractor can be
moved.
Do not tow the machine. Move it by hand or use a winch to
load on a trailer for transporting.
When transporting on another vehicle, the tractor should be
facing forward and it must be secured.
IMPORTANT: Always make certain the two bypass valves
are returned to their operating position before running the trac-
tor following repairs.
ROPS
(Roll Over Protective Structure)
A Roll Over Protective Structure (ROPS) and seat belt is
provided with the equipment. Do not remove the ROPS and
seat belt. ROPS when used with seat belt is effective in
reducing injuries during unit overturn accidents. Overturning
the unit without ROPS can result in serious injury or death.
NOTE: Inspect the ROPS after the first 20 hours of opera-
tion. Following the initial inspection, check the ROPS after
every 500 hours of operation or every six months, whichever
comes first. Figure 3-6
1. Check the torque of the ROPS mounting bolts. Tighten
the bolts to the correct torques as shown below if
necessary. Figure 3-7
2. Inspect the operator’s seat and the mounting parts for the
seat belt. Tighten the bolts to the correct torque as shown
below if necessary and replace parts that show wear or
damage.
Torque values are given below:
Ft-lbs. Nm
Hustler Z4 ROPS mounting bolts . . . . . . 73. . . . . 99
Seat belt mounting hardware. . . . . . . . . . 48. . . . . 65
The two-post ROPS can be pivoted down by removing the
right and left retaining rings and pulling out on the clevis pins so
that the machine can operate under low hanging tree limbs or
Figure 3-5
Figure 3-6
ROPS
Retaining rings
Clevis
pin
