Blower; Blower Speed - CONCORD 2800 Operator's Manual

3. Operation

3.7 Blower

The blower system for the air cart generates air
pressure/flow to carry the seed or other input
products through the system to the implement. A
hydraulic motor drives the blower system. Two 3/4
inch hydraulic lines supply oil to the blower.
The only part on the blower that can be serviced is
the shaft seal. The shaft seal can be replaced if the
motor leaks at the shaft. Do not disassemble the
motor to replace the shaft seal. The shaft seal is
fastened by a snap ring and can be removed with a
seal pick.
IMPORTANT:
Be sure that the case drain line on the blower
Fig. 11
motor is not connected to pressure. Damage to
the shaft seal or motor will result.
IMPORTANT:
Do not under any circumstances disassemble the
motor. The motor is very difficult to correctly
assemble and motor destruction will result. If a
motor failure occurs, get a replacement motor
from the dealer.

3.7.1 Blower speed

Operate the blower at as slow a speed as possible to prevent damage to seed. If operated too slowly, line
blockage will occur. Typical blower speeds are between 3000 and 6000 rpm. The drill width, product, rate,
humidity, and other factors can change blower speed.
If a run blockage monitor is not used, make sure all runs are operating after changing blower speeds. To
check the runs:
1. Turn the meter(s) with the blower running
2. Make sure there is product at each ground opener
If high rates are being applied with this implement and the implement is equipped with two fans, use the
fan only circuit with the low pressure return fitting. This will help decrease the back pressure in the circuit
and give the maximum output.
The number of outlets on the implement will directly change the blower rpm. The more outlets in use, the
higher the pressure required to keep blower rpm. See your dealer for hydraulic adjustments to your tractor,
if necessary.
A diverter valve in front of the cart selects the fan or auxiliary function. Push the knob in to run the blower.
Pull the knob out to run the auger or winch.
One method to determine blower RPM is to remove a final run from the seed boot or shoe. Hold the hose
about 1.5 meter (5 ft) off of the ground pointing straight up. Turn product out of the meter with the blower
running. The product coming from the hose must blow out of the hose approximately 203 mm (8 inches)
into the air. Adjust blower RPM as required.
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