Great Plains 2525A Operator Manual - Manual (Page 18)

14 2025A/2525A Table of Contents Index Great Plains Manufacturing, Inc.
118-999M Table of Contents Index 2013-06-04
Hydraulic Hose Hookup
Great Plains hydraulic hoses are color coded to help you
hookup hoses to your tractor outlets. Hoses that go to
the same remote valve are marked with the same color.
Refer to Figure 3
To distinguish hoses on the same hydraulic circuit, refer
to hose label. The hose under an extended-cylinder sym-
bol feeds a cylinder base end. The hose under a
retracted-cylinder symbol feeds a cylinder rod end.
For the hydraulic motor, connect the hose under the
retracted cylinder symbol to the pressure side of the
motor. Connect the hose under the extended cylinder
symbol to the return side of the motor.
The fan motor further requires hookup of a third line,
which returns hydraulic fluid from the fan motor case.
Machine Damage Risk:
Case Drain Hose must be attached first,
prior to inlet and return hoses being connected.
Case Drain Hose must be detached last,
to prevent damage to the fan motor.
Protecting Fan Hydraulic Motor Seals
Low Pressure (Case) Drain Connection
1. Attach case drain hose to low pressure drain con-
nection.
Note: Case drain hose has the smaller
1 ⁄
4
in I.D. hose
and small, flat-face, connector.
2. Connect low pressure motor return hose to low pres-
sure return connector. It is distinguished by a large
(1.06in/2.7cm diameter) quick coupler.
Machine Damage Risk:
DO NOT connect the case drain line to a
power-beyond-port.
3. Connect hydraulic hoses to tractor remotes.
Color Hydraulic Function
Black Fan (3 hoses)
Green Markers
Figure 3
Marker Hose Label
27270
High Pressure Fluid Hazard:
Relieve pressure before disconnecting hydraulic lines. Use
paper or cardboard, NOT BODY PARTS, to check for leaks.
Wear protective gloves and safety glasses or goggles when
working with hydraulic systems. Escaping fluid under pressure
can have sufficient pressure to penetrate the skin causing seri-
ous injury. If an accident occurs, seek immediate medical
assistance from a physician familiar with this type of injury.
Only trained personnel should work on system hydraulics.