Bulletin HY25-1890-M1/US
Owner’s Manual
10-Bolt Extended Shaft PTOs
Parker Hannifin Corporation
Chelsea Products Division
Olive Branch, MS 38654  USA
3
   This symbol warns of possible personal injury.
Safety Information (Continued)
 WARNING: Operating the PTO with the Vehicle in Motion
Some Power Take-Offs may be operated when the vehicle is in motion. To do so, the PTO must have been  
properly selected to operate at highway speeds and correctly matched to the vehicle transmission and the  
requirements of the driven equipment.
If in doubt about the PTO specifications and capabilities, avoid operating the PTO when the vehicle is in motion. 
Improper application and/or operation can cause serious personal injury or premature failure of the vehicle, the 
driven equipment, and/or the PTO.
Always remember to disengage the PTO when the driven equipment is not in operation. 
Chelsea PTO Safety Label Instructions
1.  The two black and orange on white 5" x 7" pressure sensitive vinyl labels, part number 379274, must be placed 
on the vehicle frame rails (one (1) on each side), in a position that would be HIGHLY visible to 
anyone that would go under the truck near the PTO rotating shaft. If the vehicle is to be painted after these 
labels are installed, cover them with two (2) blank masking covers. Remove the masking covers 
after painting.
2.  Place the one (1) black and orange on white 3.5" x 5" pressure sensitive vinyl label, part number 379275, on 
the visor nearest the operator of the vehicle, this must be placed near the PTO visor label.
3.  Place the one (1) red and white with black lettering 3.5" x 7.5" pressure sensitive vinyl label, part number 
379915, on the opposite side of the visor from the above label part number 379275.
4.  Place the one (1) white and black heavy duty card, part number 379276, in the vehicle glove box in a  
position highly visible to the operator. For example, try to place this card on top of whatever may be in the glove 
box.
If you require labels, please order part number 328946X at no charge from your local Chelsea Warehouse or send 
request direct to:
  Parker Hannifin Corporation
  Chelsea Products Division
  8225 Hacks Cross Road
  Olive Branch, MS 38654
  Customer Service: (662) 895-1011
Part #379275
Part #379915
Part #379274
Part #379276
General Information