DF40QH / DF50QH 19
Engine speed control during shifting
On QH-specification models, a special safety feature to con-
trol engine speed during shifting has been added. This fea-
ture fixes the upper limit of engine speed during shifting to a
preset value of 1500 r/min.
[ Operation ]
If the CTP switch is “OFF” and engine speed at the moment of
shifting (neutral switch turns “OFF” ) is above the rpm limit of
1500 r/min, engine speed will automatically be lowered to
approximately 1500 r/min.
Once this feature is engaged, engine speed will be regulated
to remain at the fixed 1500 r/min limit until the feature is can-
celled.
[ Cancellation ]
The engine speed control feature will be canceled if any one
of the following conditions is satisfied:
• Throttle is returned to and remains at full close (CTP switch
“ON”) for at least one second.
• Engine speed is lowered below the control speed (1500 r/
min) and remains there for at least for two seconds.
Checking engine total operating hours
As a monitor-tachometer gauge is not supplied with QH mod-
els, engine total operating hours must be checked using SDS
and a personal computer or by temporarily connecting a DF
model monitor-tachometer.
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