Parker 252 Series, Owner'S Manual

Page: 20 / 44

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