Chevrolet Silverado HD Wartungshandbuch PDF herunterladen (Seite 74)

Black plate (47,1)

Chevrolet/GMC Duramax Diesel Supplement (GMNA Localizing-U.S./Canada-

7132827) - 2015 - CRC - 10/21/14

Driving and Operating 9-47

The variable PTO mode controls

engine speed, and PTO load

engagement is selected by either

the PTO in-cab or remote switches.

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 operating the

transmission in manual mode

because upshifts are limited. Mobile

PTO is only available in M1, M2,

and M3. This reduces the maximum

vehicle speed while allowing high

engine speed operation.

PTO Switch Operation

To engage PTO, press and release

the in-cab PTO switch or, press and

release the remote PTO arm switch,

then within five seconds, press and

release the PTO remote start/

shutdown switch. The vehicle will

increase engine speed to a factory

preset engine speed (900 rpm). This

PTO stand-by 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 stand-by speed can be

adjusted by holding the accelerator

to the desired engine speed, then

pressing and releasing the in-cab

PTO switch. The current engine

speed will become the new stand-by

speed. This adjustment can only be

done once at the initial engagement

of PTO. The initial stand-by speed

adjustment must be between engine

base idle speed and 1500 rpm

(maximum PTO engage speed).

Press and release the in-cab switch.

The engine speed will be reduced to

the base idle speed and the PTO

load relay will be disengaged. In

remote mode, press and release the

PTO remote start/shutdown switch.

PTO Operational Speed Control

SET: Press and hold the

accelerator to obtain the desired

engine speed, then press and

release the SET– 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 3100 rpm.

TAP-DOWN: Press and release the

SET– switch to reduce the engine

speed by increments of 100 rpm.

This increment can be adjusted by a

service technician.

COAST: Press and hold the SET–

switch to reduce the rpm by 150 rpm

per second until the desired engine

speed is reached or until the initial

PTO standby speed is reached.

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