Air System Pressure - Landoll 5530 Operator's Manual

4-10 AIR SYSTEM PRESSURE

4-10.1 The air system pressure on the grain
drill can safely operate in a range from 15
psi to 100 psi. A system pressure gauge is
located at the front of the hitch and can be
seen from the tractor to monitor system pres-
sure (See Figure 4-8). It is normal for the
system air pressure to vary while working in
the field. As the openers raise and lower
over ground conditions, so will the system
pressure vary.
4-10.2 Do not at any time operate the air sys-
tem below 15 psi. The air springs must main-
tain a minimum air pressure for proper infla-
tion. Too low of pressure will cause the air
spring to rub internally and lead to failure.
4-10.3 System pressure should not exceed
100 psi. This is the maximum recommended
working pressure the air springs are rated
for. This will provide maximum down pres-
sure for the row units. A system relief valve
is installed at the front of the hitch to protect
the system from excessive pressure. Do not
remove or adjust the relief valve or damage
to the air system may occur.
4-10.4 To adjust the air system pressure, use
the on board air compressor (See Section
4-9) to increase system pressure. To lower
system pressure, pull and hold the ring lo-
cated at the bottom of the relief valve on the
front of the hitch.
4-10.5 Initial settings – When beginning plant-
ing operations, use a system pressure of
20-50 psi for light or sandy soils, 40-60 psi
for medium or conventional tilled soils, and
70-100 psi for heavy and notill planting.
These are initial settings. Operator must ver-
ify seed placement and adjust air system
pressure as required.
air system pressure op
Figure 4-8 Air System Pressure
Maintenance – Relieve air system pres-
4-10.6
sure before attempting to adjust or service
any air spring. Do not pressurize the air sys-
tem unless all row unit components are in
place. When charging the system, verify that
all air springs are filling properly. If the air
spring buckles or rolls off to the side, relieve
system pressure, and work or roll the air
spring over the lower piston by hand. Slowly
begin charging the system and verify proper
filling.
4-10.7 Storage – When storing the drill, leave
the air system charged, and allow the sys-
tem to slowly leak down.
AIR
COMPRESSOR
0-160 PSI
PRESSURE
GAUGE
RELIEF VALVE
RELIEF VALVE
RING
4-11