Parker 252 Series, Owner'S Manual

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Bulletin HY25-1806-M1/US
Owner’s Manual
252 Series
Parker Hannifin Corporation
Chelsea Products Division
Olive Branch, MS 38654 USA
21
Dodge/Sterling/Ram Installation
Overview (MY2011 & MY2012)
PTO Operation
The 3500/4500/5500 RAM Chassis Cab vehicle, when equipped with either the automatic AISIN 6-speed or
manual G-56 6-speed transmissions, will allow for an aftermarket upfit with a transmission driven PTO (Power
Take-Off). The customer will have the ability to operate the PTO in either a “stationary” or “mobile” mode. The
vehicles will be factory set to the “stationary” mode. In order to select the “mobile” mode a Chrysler Group LLC
Dealership is required to modify the vehicles settings using their proprietary Dealer service tool. Under normal
operation the vehicle will go to a 900 rpm when PTO is engaged. By utilizing the cruise switches the idle speed
can then be adjusted to between 900 and 2000 rpms.
Stationary Mode
This feature interacts with the transmission to utilize an auxiliary shaft to drive equipment. Activated by a
switch inside the cab, this feature operates only when the vehicle is stationary. The input is switched to ground.
Once active, the engine speed increased by holding the RES ACCEL button on the steering wheel or decreased
by holding the COAST button. Stationary PTO is available only when the vehicle is stationary. When the truck
is equipped with an automatic transmission, it must be in Park and the service brake must be released and
functional. When the truck is equipped with a manual transmission, the Parking Brake must be Set and the service
brake must be released and functional.
To operate the PTO in this mode the vehicle must meet the following conditions:
• Be in “park” position ( vehicles equipped with automatic transmission)
• Upfitter provider (on/off) switch has been activated
• Parking brake applied (vehicles equipped with manual transmission)
• Clutch not depressed (clutch interlock switch)
• Vehicle must be running
• No transmission, engine, accelerator, brake or clutch switch faults present
• PTO must be correctly installed using the vehicle provided circuits
The customer has the choice to operate the PTO by utilizing the cruise control switches or by utilizing a remote
control (provided by the PTO supplier). To operate the feature using the cruise control switches the customer
must first activate the up fitter provided on/off switch. The vehicle is now in the PTO mode and is ready for use. In
order to increase or decrease the engine idle speed, to optimize the PTO function, the “accel” and “decel” cruise
switches can be used respectively. To disengage PTO operation and return to “standard vehicle operation” simply
turn the up fitter provided on/off switch to the off position.
To operate the PTO via a remote switch the customer must make sure the above conditions are met. It is vital
for proper operation that the PTO and remote have been installed correctly paying special attention to ensure
the vehicle provided wiring has been connected properly. This is the responsibility of the installer of the PTO and
switches/remote system. It is the responsibility of the PTO manufacturer to ensure that their electrical (switches
and remote) system is compatible with the vehicle’s electrical architecture and software functionality.