Great Plains 3S-4000F Operator Manual - Manual (Page 76)

72 3S-4000 Table of Contents Index Great Plains Manufacturing, Inc.
195-394M Table of Contents Index 2014-06-10
Pressure gauges
read zero when
openers are
lowered and
tractor hydraulic
lever is held
forward Hydraulic hoses not routed correctly
between pressure control valves and
opener lift cylinders. See hose routing diagrams beginning on page 97.
Pressure gauges
show pressure
when openers are
raised. Hydraulic hoses not routed correctly
between pressure control valves and
opener lift cylinders. See hose routing diagrams beginning on page 97.
Transport lock
channels will not
stay in position for
transport. U-shaped clip in lock channel not
clasping cylinder rod securely. Tighten or loosen clip by turning bolt on clip. Replace
clip if necessary.
Hydraulic cylinders have not settled
against lock channels before
transporting. Make sure hydraulic cylinders have settled against
lock channels before transporting. The weight of the
cylinders help hold lock channels in place.
Hydraulic marker
functioning
improperly Air or oil leaks in hose fittings or
connections. Check all hose fittings and connections for air or oil
leaks.
Low tractor hydraulic oil level. Check tractor hydraulic oil level.
Loose or missing bolts or fasteners. Check all bolts and fasteners.
Needle valve plugged. Open needle valve, cycle markers slowly and reset
needle valve, refer to page 64.
Marker disk does
not mark Marker folding linkage does not have
enough slack to allow marker disk to
drop into field depressions. Maximum down float should be limited by the slot at
the rod end of marker cylinder.
Marker disk orientation. Reverse marker disk to pull or throw dirt.
Chain Debris/no retainer clip Be sure retainer clip is facing opposite way of chain
travel.
General Troubleshooting
Problem Cause Solution