Hydraulic Systems; Drill To Tractor Hydraulic Couplers; Bleed The Air From The Hydraulic Lift System - CONCORD NT30 Operator's Manual

3. Operation

3.7 Hydraulic systems

The hydraulic system on the machine includes:
• Blower control circuit
• Downpressure circuit
• Wing fold circuit
• Depth control circuit
• Hydraulic jack
This system was designed to function under a
maximum hydraulic pressure of 2900 psi (19 995
kPa).

3.7.1 Drill to tractor hydraulic couplers

The couplers connecting the blower pressure and the return lines from the drill to the tractor are (1/2 inch)
#10 ISO 5675 (Pioneer) tip couplers.
A (3/8 inch) #8 ISO 16028 (flat-face) coupler tip on the drill connects the case drain line to the tractor. The
case drain line must be connected or the blower motor will be damaged. If a case drain return port is not
available on your tractor, contact your dealer.
A (3/4 inch) #12 ISO 7241-1 Series A low-pressure return tip is included with all implements. The low-
pressure return tip is also available through Service Parts.
If your tractor has a low-pressure port available, the low-pressure return tip can be used on the 3/4 inch
blower return line. Using the low-pressure return tip can remove the pressure drop caused by the 1/2 inch
Pioneer tip and the hydraulic valve of the tractor on the return side. The low-pressure return tip can also be
used on the case drain line, if the 3/8 inch flat face port is not available.
Do not install a tee fitting connecting the blower return line and the blower case drain lines together. The
blower case line must always be connected to a direct return to the hydraulic reservoir or blower motor
failure will result.
The hydraulic line with the label pressure must be used to operate the blower. A check valve is installed in
the blower circuit to protect the motor from the too much pressure in the return line and prevents cavitation
during shutdown.
The couplers connecting the downpressure, wing fold, depth control circuits and hydraulic jack from the
drill to the tractor are (1/2 inch) #10 ISO 5675 (Pioneer) tip couplers.

3.7.2 Bleed the air from the hydraulic lift system

Before starting the procedure
WARNING:
Leaking fluid under pressure can enter the skin causing serious injury. Release pressure
before disconnecting hydraulic or other lines. Tighten all connections before applying
pressure. Keep hands and body away from pinholes and nozzles which eject fluids under
high pressure. Wear correct hand and correct eye protection when looking for leaks. Use
a piece of cardboard or paper instead of your hand. Any fluid injected into the skin can
cause gangrene. The fluid must be removed by a doctor familiar with this type of injury.
Fan only 10cc fan motor
Fan speed Flow
3000 rpm 8 gal/min
(30.1 l/min)
4000 rpm 10.5 gal/min
(39.7 l/min)
5000 rpm 13.5 gal/min
(51 l/min)
6000 rpm 60.6 l/min (16
gal/min)
62
GUID-5583E48B-EA43-4D2D-841B-0873FAA4D648 [V2]
Pressure
1000 to 1500
psi (6895 to
10 342 kPa)
1400 to 1900
psi (9653 to
13 100 kPa)
1800 to 2300
psi (12 411 to
15 858 kPa)
2200 to 2700 psi
(15 168 to 18
616 kPa )
GUID-E5B3C8AF-2282-4A20-84F0-54FCD01EE07B [V2]
GUID-2300D304-1802-4128-8D52-5389D08A9EBD [V4]
Narrow-Transport Grain
Drill (322782B)