Bulletin HY25-1890-M1/US
Owner’s Manual
10-Bolt Extended Shaft PTOs
Parker Hannifin Corporation
Chelsea Products Division
Olive Branch, MS 38654  USA
17
Installation Sketches
Elec/Hyd Shift Option B (12V) & D (24V) – w/o EOC 
890/892 Series
(SK-459 Rev B)
NOTE: Strip Wire Ends .25" Prior to Installing in Spade Terminal or Butt Connector (As Necessary)
O
READ 
OWNERS
CHELSEA
O
F
F
P. T. O. IS ENGAGED WHEN LIGHT IS ON
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MANUAL
379265 Grommet
Electrical Ground of Cab or Frame
Accepts #10 Screw
Slice Grommet 
Insert in Hole 
379265 Grommet 
in Firewall
Drill 1" Dia. Hole in Firewall
Black
379504 Valve Connector 
and Wire Assembly
Pre-2005 - Connect to Pin J1-6 (TCM) or Wire #106
2005-Later - Connect to Pin 43 (TCM) or Wire #143
Contact chassis OEM for Location Details
Run Wires through 
Grommet in Firewall
379254-17 14-Gauge Wire 
with Fork Terminal
379306 Spade Terminal
378881 
Rocker 
Switch
379252 
Butt 
Connector
Indicator Light 
378978 - 12V 
379005 - 24V
379336 
Switch
Bracket
Positive Terminal of Ignition or Battery
379257 Splice Connector
379900 Fuse Holder Ass’y 
w/ 10 Amp Fuse
Blue
Red
Reference Kit - 329024-12X for 12V Installation. 
Reference Kit - 329024-24X for 24V Installation. 
Connection to Transmission Controller is Required 
for Full Pressure to PTO Clutches.
379502 Pressure Switch
Torque to 24-28 lbs-ft