Great Plains YP3025A Operator Manual - Manual (Page 20)

16 YP3025A Table of Contents Index Great Plains Manufacturing, Inc.
401-705M Table of Contents Index 02/16/2012
Older Style Hoses with Color Ties
Great Plains hydraulic hoses are color coded.Hoses that
go to the same remote valve are marked with the same
color tie.
Refer to Figure 4
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 hydraulic fan and drive motors, connect the hose
under the retracted cylinder symbol to the pressure side
of the motor. Connect the hose under the extended cylin-
der 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.
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.
3. Connect hydraulic hoses to tractor remotes.
Color Hydraulic Function
White Wing Fold / Marker Fold / Auxiliary
Blue Lift / (and Hitch if hydraulic tongue)
Orange Fan
Yellow Hydraulic Drive
Null4:
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.
Machine Damage Risk:
DO NOT connect the case drain line to a
power-beyond-port.
Figure 4
Older Style Hoses w/ Label
27270