M0275-01
Model 3700
2-34
Rev. 10/18
TM
Machine Operation
A pressure relief valve prevents build up of oil pressure
over 35 PSI (241 kPa) in case drain line when vacuum
fan motor is operating. This valve vent oils outside
through a drain hole in aluminum valve block. This can
occur whenever case drain is improperly connected or
pressure in motor circuit builds.
Valve block contains a check valve that prevents
vacuum fan from operating in wrong direction if
pressure is applied to return side of motor and allows
fan to coast to a stop when tractor hydraulic control is
returned to neutral position.
Kinze vacuum seed metering system includes seed meters, seed discs, and an air system consisting of a hydraulic
driven vacuum fan which draws air through manifolds, hoses, and seed meters on each row unit.
VACUUM SYSTEM
VACUUM FAN VALVE BLOCK ASSEMBLY
See “Hydraulic Schematic (Vacuum Fan System)” in Lubrication and Maintenance section.
NOTE: Fan turns at a reduced speed If reverse pressure is applied.
Vacuum fan valve block
Analog vacuum or pressure gauge connects directly to vacuum
meter (vacuum) or bulk fill (pressure) manifold and is teed into
digital sending units.
Only adjustment is to “zero” needle with no vacuum or
pressure present. If there is a significant difference between
gauge and a reading taken at meters, a different manifold
location should be found to connect hose to gauge and digital
sending unit.
8
KILOPASCALS
MAX PRESSURE 15 PSIG (103 KPA)
ANALOG VACUUM OR PRESSURE GAUGE
Analog Gauge
NOTE: Analog gauges are identical EXCEPT for plug and hose barb locations in side of gauge housing.
DO NOT connect vacuum meter or bulk fill hose to wrong gauge. Check plug and hose barb installation if
readout is erratic or appears inaccurate.
Moving fan blades can cause amputation
or severe injury. Never operate vacuum
fan with cover removed.
WARNING
Summary of Contents for 3700
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