Parker 252 Series, Owner'S Manual

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Bulletin HY25-1806-M1/US
Owner’s Manual
252 Series
Parker Hannifin Corporation
Chelsea Products Division
Olive Branch, MS 38654 USA
2
General Information
This symbol warns of possible personal injury.
Safety Information (Continued)
Cold Weather Operation of PowerShift PTO
WARNING: During extreme cold weather operation [32°F (0°C) and lower], a disengaged PowerShift Power
Take-Off can momentarily transmit high torque that will cause unexpected output shaft rotation. This is caused by
the high viscosity of the transmission oil when it is extremely cold. As slippage occurs between the Power Take-Off
clutch plates, the oil will rapidly heat up and the viscous drag will quickly decrease.
The Power Take-Off output shaft rotation could cause unexpected movement of the driven equipment resulting in
serious personal injury, death, or equipment damage.
To avoid personal injury or equipment damage:
■
Driven equipment must have separate controls.
■
The driven equipment must be left in the disengaged position when not in operation.
■
Do not operate the driven equipment until the vehicle is allowed to warm up.
Rotating Auxiliary Driveshafts
WARNING:
■
Rotating auxiliary driveshafts are dangerous. You can snag clothes, skin, hair, hands, etc. This can cause
serious injury or death.
■
Do not go under the vehicle when the engine is running.
■
Do not work on or near an exposed shaft when the engine is running.
■
Shut off the engine before working on the Power Take-Off or driven equipment.
■
Exposed rotating driveshafts must be guarded.
Guarding Auxiliary Driveshafts
WARNING: We strongly recommend that a Power Take-Off and a directly mounted pump be used to
eliminate the auxiliary driveshaft whenever possible. If an auxiliary driveshaft is used and remains exposed after
installation, it is the responsibility of the vehicle designer and PTO installer to install a guard.
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 PTO 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 PTO. Always install the safety information decals according to
the instructions provided. Place the owner’s manual in the vehicle glove compartment.