Hydraulic Motor Return and Case Drain Kits

A motor return port is provided in top outlet of hitch valve or in power beyond end cover if tractor was ordered without hitch. This port provides access to tractor low pressure return circuit.

Port (A) is used for motor case drain for low pressure low flow applications. Motor case drain is used when return oil flow may be too high for motor return port and could cause back pressure that may damage seals in the motor. Motor return and case drain kits are available from your John Deere dealer.

Remove cap from hydraulic motor return coupler. Connect return hose to coupler, making sure hose end and coupler are clean.

Using the motor return coupler will prevent:

• Inadvertent reverse operation
• Pressurization of auxiliary function return line
• Potential flow checking of the return-side SCV coupling

Examples of implements which cannot withstand high pressure applied to both ports are:

• Hydraulic motors which have the return and case drain ports connected. Failure of the motor housing or shaft seals may result if the return line is pressurized.
• Auxiliary control valves located on the implement may allow unexpected movement of cylinders or not function correctly if the return line pressure is too high.

NOTE: Motors without over-running check valves should be connected to the motor return coupler to prevent return line pressurization when SCV is returned to neutral.

A-Low Pressure Access Port

OUMX005,0001675 -19-16AUG05-1/1