Great Plains CTA4000 HD Operator Manual - Manual (Page 28)

24 CTA4000HD Great Plains Manufacturing, Inc.
160-037M 2012-11-28
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
cylinder set requires about 5 gallons of oil.
Refer to Figure 22
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
extending rods will not contact anything.
Refer to Figure 23
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
fitting, then tighten fitting.
Refer to Figure 24
6.
Loosen fittings of fold cylinder as shown.
7. Slowly engage hydraulic lever, as if unfolding
implement, until oil appears at loosened fittings.
Continue engaging lever until all air has been
expelled from fitting, 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
hydraulic leaks. Be aware of any pinch points that
might cause damage or accelerate wear on hydraulic
hoses.
Figure 22
Fold Cylinder Bleeding
16432
2
1
Figure 23
Handles for Fold Bleed
26375
1
2
Figure 24
Fold Bleed Points
17199