Great Plains 2420P Operator Manual - Manual (Page 50)

2410P and 2420P
118-769M 2012-04-17
48
Hydraulic marker functioning
improperly Air or oil leaks in hose fittings or con-
nections. Check all hose fittings and connec-
tions 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 38.
Needle valve(s) in sequence valve
plugged. Open needle valves, cycle markers
slowly and reset needle valves, refer
to page 38.
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 lim-
ited by the slot at the rod end of the
marker cylinder, refer to page 38.
Reverse marker disk to pull or throw
dirt.
Problem Cause Solution