Great Plains CTA4000 Operator Manual - Manual (Page 22)

18 CTA4000
160-269M-A 08/03/2010
Bleeding Fold Hydraulics
Overhead crushing hazard.
To prevent serious injury or death:
▲ Fold implement only if fold hydraulics are bled free of air
and fully charged with hydraulic oil.
▲ Keep away and keep others away when folding or unfolding
implement.
Before folding, you must hitch the implement to the tractor and
cart. Failure to do so could result in severe equipment damage
and bodily injury or death.
1. Check hydraulic-fluid level in tractor reservoir and fill
to proper level. Filling a completely empty fold cylin-
der set requires about 5 gallons of oil.
Refer to Figure 14
2.
If not already done for lift bleeding, with implement
unfolded, disconnect rod ends of fold cylinders
.
Place a support under the cylinder end so extend-
ing rods will not contact anything.
Refer to Figure 15
3.
Turn field/folding selector valve to fold position.
4. Loosen rod-end fitting.
5. Slowly engage hydraulic lever as if folding implement
until oil appears at loosened hose fitting. Continue
engaging lever until all air has been expelled from fit-
ting, then tighten fitting.
Refer to Figure 16
6.
Loosen fittings of fold cylinder as shown.
7. Slowly engage hydraulic lever, as if unfolding imple-
ment, until oil appears at loosened fittings. Continue
engaging lever until all air has been expelled from fit-
ting, then tighten fitting.
8. Cycle fold cylinders in and out 10 times.
9. Re-pin cylinder rods to cylinder mounts.
10. Recheck tractor hydraulic reservoir and fill to proper
level.
11. Slowly fold and unfold implement. Check for hydrau-
lic leaks. Be aware of any pinch points that might
cause damage or accelerate wear on hydraulic
hoses.
Figure 14
Fold Cylinder Bleeding
16432
2
1
Figure 15
Handles for Fold Bleed
26375
1
2
Figure 16
Fold Bleed Points
17199