Seed Hawk TOOLBAR 2010 - Manual (Page 54)

Seed Hawk Manual Tool Bar Page 51
SYMPTOM POSSIBLE CAUSE SOLUTION
Wing hydraulic
system does not
maintain pressure. The “IN” pressure gauge indicates
less than 1200 lb
f
/in
2
(8 275 kPa).
Inspect quick couplers to ensure
complete engagement.
Check 7 plex wing down value. (
only on 7 plex machines. 72 feet
and up) Remove, inspect orings, clean and
replace cartridge if necessary.
Wing lift cylinder piston leaking. Remove hose from rod end of
cylinder. If oil discharges, seal is
leaking. Remove and replace seal.
Wings do not raise. The “IN” pressure gauge indicates
less than 1200 lb
f
/in
2
(8 275 kPa)
for smaller implements and less
than 2100 lb
f
/in
2
(14.50 kPa) for
larger implements.
Inspect quick couplers to ensure
complete engagement. Check to see
that the circuit is putting out enough
pressure.
Wing cylinder piston seal leaking. Remove hose from rod end of
cylinder. If oil discharges, seal is
leaking. Remove and replace seal.
Can not maintain
packing pressure or
shanks will not stay
up in transport. Seal damaged in shank cylinder.
Check orings on meter engage
valve also make sure meter
engage switch is shut off. Pressure shanks up and keep locked
on. Undo main bridle hoses on the
rod end of cylinder on both ports. If
oil is flowing out of a hose, then it is
that rank on that wing that has a seal
leak. Move down that rank, undoing
the hoses on the rod end of each
cylinder. When the oil quits flowing, it
is the previous cylinder with the faulty
seal. Replace cylinder seal(s) and
repeat process in case of more than
one faulty seal.