Tractor Hydraulic System Requirements

Operation of the hydraulically driven fan requires tractor to have either a load sensing hydraulic system or a closed-center hydraulic system with flow control. These types of hydraulic systems usually have large oil reservoirs and increased oil cooling capacity. They deliver the oil flow needed for the fan motor to maintain fan speed at the selected RPMs without surging.

Tractors with open center hydraulic systems are not recommended.

NOTE: The following table is the maximum hydraulic system requirements, typical requirements are half of maximum requirements.

Hydraulic System Requirements
Source	Function	Liters-per-minute (Gallons-per-minute)
SCV	Fan/Auger	65.5-100.7 L/min (17.3-26.6 gpm) - Fan
Power Beyond	Variable Rate Drive	2-Meters 30.3 L/min (8 gpm) 3-Meters 45.4 L/min (12 gpm)

IMPORTANT: In addition to these requirements, tractor MUST be equipped with a low-pressure drain line connection for the fan motor case drain.

Prevent fan motor damage. Sump pressure MUST be less than 172 kPa (1.72 bar) (25 psi).

See your John Deere dealer for installation of a Low-Pressure Drain Line Kit, if your tractor is not so equipped.

NOTE: See Recommended Tractors and Tractor Hydraulic Compatibility for further information.

Verify tractor hydraulic system meets all requirements.