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Grasshopper 721DT - Engine Starting Tips and Shutdowns; High Temperature Shutdown System; Uneven Terrain Operation Safety

Grasshopper 721DT
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17
starting sequence (including the
preheating sequence). Also, if the
engine will not start after refuel-
ing or after setting for a prolonged
period, refer to bleeding fuel lines
in the “Engine Troubleshooting”
section of this manual. Never allow
the starter motor to run continu-
ously for more than 30 seconds. Be
sure to warm engine up regardless
of season. Loading an insuf cient-
ly warmed up engine will shorten its
service life.
COLD WEATHER STARTING TIPS
Use proper viscosity oil for temperature ex-
pected (refer to “Engine Manual”).
Set throttle half open.
A warm battery has better starting capacity
than a cold one.
Use fresh winter grade fuel. It is better for win-
ter starting than leftover summer grade fuel.
HIGH TEMPERATURE SHUTDOWN
This machine is equipped with a high temper-
ature shutdown system that monitors engine
coolant temperature. If coolant is too low,
the high temperature shutdown system will
not function properly. Check level daily (see
Lubrication and Maintenance). When the
engine coolant temperature reaches the red
level, the electrical system disengages the
PTO drive to the attachment. This reduces
the load on the engine which reduces heat.
If the engine temperature does not lower af-
ter the PTO is shut down, turn off the engine
immediately. To re-engage the PTO, the shut-
down system must be reset. The following
procedure should be followed:
1. Set throttle to half, disengage PTO switch
and set the parking brake.
2. Dismount the machine and remove the
grille.
3. Clean the grille and radiator of all loose
debris.
4. Replace grille and remount to the operator
seat.
5. Make sure the engine temperature gauge
reads in the white or green. This may take
a few minutes.
6. Set throttle to slow and turn off the engine
at the key switch to reset system.
7. Restart the engine and check engine tem-
perature.
To avoid engine overheating, maintain en-
gine cooling system daily (see Lubrication
and Maintenance section). If you experi-
ence repeated occurrences of high engine
temperature shutdown, the radiator should
be cleaned. Clean radiator with water from
a normal pressure garden hose. Make sure
direction of spray is straight into the radia-
tor fins. DO NOT USE HIGH PRESSURE
SPRAY. High pressure, directed at an angle
to the ns, will bend ns over so air will not
ow through the radiator. A radiator cleanout
tool is available through your dealer (part no.
609015).
UNEVEN TERRAIN
Be careful when operating machine
on uneven ground.
Do not operate on steep slopes.
Operation on a steep slope could
cause loss of control, machine to
overturn and personal injury or
death.
Do not operate on steep slopes. This
machine was not speci cally designed to
operate on steep slopes.
The operator is responsible for safe op-
eration on slopes. Only the operator can
determine the stability of the machine on
a given slope based on existing conditions
like: machine speed and direction, slope
variation, slipperiness, drop-offs, holes,
WARNING
WARNING

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