Parker 252 Series - GM C;K Series PTO Wiring

Bulletin HY25-1806-M1/US
Owner’s Manual
252 Series
Parker Hannifin Corporation
Chelsea Products Division
Olive Branch, MS 38654 USA
16
NOTE: If using the GM provided in-dash switch, skip to
item # 9.
8. Install the PTO rocker switch and bracket in the cab.
Under the vehicle connect the two Packard connectors.
A) The gray w/green male harness connector to the
gray pressure female connector (Fig. 26).
B) The gray male w/blue connector to the white
solenoid female connector (Fig. 27).
C) Route the other end of the Chelsea wiring over the
transmission and into the cab and connect wires as
illustrated on page 17.
Fig. 27
Fig. 26
PTO Installation
Allison 1000, 2000/2500 (Continued)
GM C/K Series PTO Wiring Harness
9. For model year 2003 and higher GM C/K Series
4500, 5500, 6500, 7500 and 8500 trucks may be
equipped with the Allison 1000, 2000/2500 transmis-
sions. In these vehicles GM Truck has integrated a
PTO connector, located in the right hand engine
compartment area. A Power Take-Off switch has also
been incorporated into the GM dash panel to control
PTO operation. With the PTO option ordered on
the truck, the PTO connector and in-dash switch
simplify the interface for the body builder.
In order for the customer to utilize the full capabil-
ity of the PTO/transmission, Chelsea has designed
a wiring harness that must be used between the GM
PTO connector and the Chelsea Power Take-Off.
These are for PTO Non EOC applications only.
The main purpose of the wiring harness on the
Allison 1000, 2000/2500 transmissions will be to
engage the torque converter lock-up clutch. The
harness will also allow the end-user to utilize the
stalk-mounted cruise control to control Power
Take-Off RPM.
NOTE: For 2006 Model Year Chev. Kodiak and GMC Topkick C4500-C7500 Series with 6.6L Diesel or 8.1L Gas
engines and Allison 1000/2200/2300 Series transmission. The PTO may not operate properly due to a GM change
in feedback logic in the TCM. Please refer to GM UI Bulletin#76 REV. 1 dated 6/09/2006 or latest revision for com-
plete details.
To GM PTO
Connector
Connect to Solenoid
Valve
Connect to Pressure
Switch
Black Wire Loom
A
B
B
A
TO G.M.
PTO MODULE
Part Number 329620X – MY2007 - 2014
Part Number 75-P-33 – MY2015 - Later
To GM PTO
Connector
Connect to Solenoid
Valve
Connect to Pressure
Switch
Black Wire Loom
H
G
D
A
B
A
B
Part Number 329619X – MY2003 - 2006
MY2003 - 2006 Use Wiring Harness 329619X
MY2007 - 2014 Use Wiring Harness 329620X
MY2015 - Later Use Wiring harness 75-P-33
Allison Installation