Parker Hannifin Corporation
Chelsea Products Division
Olive Branch, MS 38654 USA
Bulletin HY25-1396-M1/US
Safety Information
Owner’s Manual
Counter Shaft & Thrushaft
Using Set Screws
WARNING:
Auxiliary driveshafts may be installed with either recessed or protruding set
screws. If you choose a square head set screw, you should be aware that it will protrude above
the hub of the yoke and may be a point where clothes, skin, hair, hands, etc. could be snagged.
A socket head set screw, which may not protrude above the hub of the yoke, does not permit the
same amount of torquing as does a square head set screw. Also, a square head set screw, if
used with a lock wire, will prevent loosening of the screw caused by vibration. Regardless of the
choice made with respect to a set screw, an exposed rotating auxiliary driveshaft must be
guarded.
Important: Safety Information and Owner’s Manual
Chelsea Power Take-Offs are packaged with safety information decals, instructions, and an
owner’s manual. These items are located in the envelope with the P.T.O. mounting gaskets.
Also, safety information and installation instructions are packaged with some individual parts and
kits. Be sure to read the owner’s manual before installing or operating the P.T.O. Always install
the safety information decals according to the instructions provided. Place the owner’s manual in
the vehicle glove compartment.
WARNING: Operating the P.T.O. with the Vehicle in Motion
Some Power Take-Offs may be operated when the vehicle is in motion. To do so, the P.T.O.
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 P.T.O.’s specifications and capabilities, avoid operating the P.T.O. 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 P.T.O.
Always remember to disengage the P.T.O. when the driven equipment is not in operation.
Pump Installation Precautions (see next page)
Use a bracket to support the pump to the transmission if:
■
The pump weighs
40 pounds
or more.
■
The combined length of the P.T.O. and pump is
18 inches
or more from the P.T.O.
centerline to the end of the pump.
Also remember to pack the female pilot of the P.T.O. pump flange with grease before installing
the pump on the P.T.O.
CAUTION
: When installing the 489 Series P.T.O. several direct mount pump flange options may
interfere with the mounting fasteners directly under the flange. The nut must be threaded far
enough onto the stud before the remaining (6) six capscrews and other nut are tightened to
prevent interference with the flange and possible breakage of the P.T.O. housing.
This symbol warns of possible personal injury.
3
Safety Information