Hydraulic Systems; Air Cart To Drill Hydraulic Coupler; Air Cart To Tractor Hydraulic Couplers - CONCORD 2800 Operator's Manual

3.5 Hydraulic systems

The hydraulic system on the air carts includes:
• Blower control circuit
• Auger control circuit
• Hydraulic meter drive control circuit
A group of control valves enables all three circuits
to be operated by one hydraulic remote on the
tractor. This system was designed to function
under a maximum hydraulic pressure of 19 995
kPa (2900 psi).

3.5.1 Air cart to drill hydraulic coupler

The couplers connecting the air cart to the drill/implement are (3/4 inch) #12 ISO 7241 Series B, high-flow
couplers. Using the high-flow couplers reduces the pressure drop across the coupler and enables the
operator to easily disconnect the air cart from the drill/implement. Make sure the pressure line on the tank
is connected to the pressure line on the drill.
The blower motor case drain line has a (5/8 inch) #10 ISO 7241 Series B coupler. The smaller size helps to
tell the difference between this coupler and other larger couplers.
IMPORTANT:
Be sure that the case drain line on the blower motor is not connected to pressure. Damage to the shaft
seal or motor will result.

3.5.2 Air cart to tractor hydraulic couplers

The couplers connecting the blower pressure and the return lines from the air cart to the tractor are #8 (1/2 inch)
ISO 5675 (Pioneer) tip coupler to a #10 (5/8 inch) female ORB.
Fan with 10cc fan motor with 5 gal
hydraulic meter priority
drive
Fan speed Flow
3000 rpm 49.2 l/min (13
gal/min)
4000 rpm 60.6 l/min (16
gal/min)
5000 rpm 70 l/min (18.5
gal/min)
6000 rpm 79.5 l/min (21
gal/min)
Fan only 10cc fan motor
Fan speed Flow
3000 rpm 30.3 l/min (8
gal/min)
4000 rpm 39.7 l/min (10.5
gal/min)
5000 rpm 51 l/min (13.5
gal/min)
6000 rpm 60.6 l/min (16
gal/min)
3. Operation
Pressure
8174 to 11 721
kPa (1200 to
1700 psi)
11 032 to 4
479 kPa (1600
to 2100 psi)
13 790 to 17
237 kPa (2000
to 2500 psi)
16 547 to19
995 kPa (2400
to 2900 psi)
Pressure
6895 to 10 342
kPa (1000 to
1500 psi)
9653 to 13 100
kPa (1400 to
1900 psi)
12 411 to 15
858 kPa (1800
to 2300 psi)
15 168 to 18
616 kPa (2200
to 2700 psi)
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