Toro Groundsmaster 5900 Series Service Manual page 75

Regeneration (continued)
Types of regeneration that are performed automatically (while the machine is operating) (continued)
Assist
Reset
Groundsmaster ® 5900 & 5910
16227SL Rev B
Occurs because of prolonged operation
at low engine speed, low engine load,
or when the engine ECU detects the
soot filter is becoming obstructed.
Occurs every 100 hours of engine
operation.
Occurs after an assist regeneration if
the engine ECU determines the assist
regeneration did not sufficiently reduce
the soot level.
Note: Reset regeneration may be
temporarily delayed if high exhaust
temperatures would create an unsafe
condition (the machine is operating
indoors or outdoors around trees, brush,
tall grass, or other temperature-sensitive
plants or materials). Refer to Setting
the Inhibit Regen in the traction unit
Operator's Manual for additional
information.
Page 4–7
The engine ECU adjusts the intake
throttle to raise the exhaust temperature.
For software 122−0310A
thru H only: the InfoCenter displays
the assist regeneration icon.
TThe engine ECU adjusts the exhaust
intake throttle and the injector timing to
raise the exhaust temperature.
For all software revisions:
the InfoCenter displays the high exhaust
temperature icon.
Yanmar Diesel Engine: General Information