CONCORD 2800 Operator's Manual page 58

3. Operation
A #8 ISO 16028 ( at-face) coupler tip to a #6 (3/8 inch) female ORB on the air cart 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 at face port is not available.
Do not install a tee tting 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.
NOTE:
The 3/4 inch low pressure return tip is not compatible with the 3/4 inch high ow ttings used at the front
of the cart. The connectors look similar, but the connectors are not compatible.
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