|
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 and deliver only the oil flow needed for the fan motor to consistently maintain fan speed at the selected RPMs without surging.
Tractors with open center hydraulic systems are not recommended for the following reasons:
-
No means to control volume of oil flow.
-
Excessive oil temperature.
-
Decreased oil flow to fan motor during operation of other tractor control valves.
-
Reduced oil flow to tractor power steering.
| Hydraulic System Requirements |
| Number of SCV's (min.) |
1 - Fan/Auger |
| Gallons-per-minute |
14-20 GPM - Fan |
|
IMPORTANT:
In addition to these requirements, tractor MUST be equipped with a low-pressure drain line connection for the fan motor case drain.
Sump pressure MUST be less than 689 kPa (6.89 bar) (100 psi), or fan motor will be damaged.
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.
Make sure tractor hydraulic system meets all requirements.
|