Blower System Diagram

ZX011318-UN-02JUN97

1 - Hydraulic Motor

2 - Three-Way Flow Control Valve

3 - Check Valve

4 - Pressure-Side Quick Coupler

5 - Quick Coupler For Pressure-Free Return

5A - Quick-Coupler Socket

6 - Hydraulic Pump

7 - Pressure-Relief Valve

8 - SCV (May Be Single- Or Double-Acting)

9 - Filter

10 - Connection For Pressure-Free Return Line

11 - Reservoir

12 - Connection For Pressure-Relief Valve

13 - Plate

A - Drill

B - Tractor

The diagram shows all the components of the blower system.

Oil flows from the SCV via the quick-couplers to the three-way flow control valve. The three-way flow control valve controls the flow rate, which in turn determines the speed of the hydraulic motor.

Recommended blower speed for the various drill models is given under Adjust Blower Speed in Operating the Pneumatic Drill System section.

IMPORTANT: On John Deere tractors belonging to Series 55, 6000, 7000 and 8000, open the three-way flow control valve (2) for maximum through flow and then set the blower speed at the tractor's SCV.

NOTE: The built-in return valve permits the blower to slow down gradually when the hydraulic system is switched off.

Plate (13) is installed only on tractors that do not have load-sensing SCVs. The plate is supplied with the tractors ready for installation.