Chevrolet 2500HD Manuel d'utilisateur Page 70

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Black plate (44,1)
DURAMAX Diesel Engine (LML/LGH) - 2011
9-44 Driving and Operating
Engine speed selection is variable
between base engine idle speed
and a maximum of 3100 rpm
(factory setting 2100 rpm).
In the mobile PTO mode, the
vehicle will operate at a vehicle
speed resulting from the current
PTO engine speed request and
current transmission gear range
selected.
Vehicle speed stability is greatly
improved by shifting into the
transmission manual mode because
upshifts are limited. This reduces
the maximum vehicle speed
while allowing high engine speed
operation. Therefore, low vehicle
speed operation 1640 km/h
(1025 mph) and high PTO engine
speed (1,5002,000 rpm) can be
achieved in the manual mode 1 and
2 transmission ranges.
PTO Switch Operation
The In-cab PTO Switch has four
positions:
R, 9, /SET, and +/RES.
R : This is the PTO switch On
position.
To engage PTO, press and release
the incab
R switch position or, press
and release the remote PTO arming
switch, then within five seconds,
assert the remote enable switch to
on. The vehicle will increase engine
speed to a factory preset engine
speed (800 rpm). This PTO standby
speed is not intended to be an
operational PTO speed, but allows
the engagement of the PTO at lower
initial start-up rpm to match with the
engagement of the PTO load relay.
The initial standby speed can be
adjusted by holding the accelerator
to the desired engine speed, then
pressing and releasing the
R incab
PTO switch position. The current
engine speed will become the new
standby speed. This adjustment
can only be done once at the initial
engagement of PTO. The initial
standby speed adjustment must be
between engine base idle speed
and 1800 rpm (maximum PTO
engage speed).
9 : This is the PTO switch Off
position.
Press and release the
incab
9 switch position or
assert the remote enable switch
to off to disengage PTO. The
engine speed will be reduced to
the base idle speed and the PTO
load relay will be disengaged.
/SET (SET/TAP-DOWN/COAST)
SET: Press and hold the
accelerator to obtain the desired
engine speed, then press and
release the /SET position of the
PTO switch. The current engine
speed will be maintained. This
action can be repeated as desired
to a higher rpm value. The PTO set
speed cannot exceed 2100 rpm.
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