214657
247
Revision A
5.9.4
Bleeding Cylinders and Lines
Air must be removed from the system for the hydraulics to perform properly. The following procedure explains how
to bleed hydraulic cylinders and lines. Bleed the hydraulics after initial installation, if the unit has been idle for a
significant period of time, or if the hydraulic system requires adjustment.
CAUTION
High-pressure hydraulic oil can cause serious injuries such as burns, cuts, and tissue damage. Always
take precautions when working with hydraulic oil. Wear safety goggles, gloves, and thick clothing. Seek
immediate medical attention if cut or burned.
1.
Raise the hold-down fully using the combine reel lift control.
Figure 5.186: Hold-Down Safety Prop
2.
Engage the hold-down safety props (A) on both sides of
header. Ensure safety props are fully rotated over
center so they remain engaged.
3.
Lower the hold-down onto the safety props (A) to
relieve the hydraulic pressure in the lines.
Figure 5.187: Bleeding Cylinder
4.
Remove the bleed port plug (not shown) completely.
IMPORTANT:
Remove the bleed port plug completely before applying
hydraulic pressure. If the bleed port plug is only
loosened, the hydraulic oil pressure will damage the
plug
’
s O-ring.
5.
Hold a plastic container up to the bleed port to collect
hydraulic oil.
6.
Activate the combine reel lift control to apply hydraulic
pressure to the system until the air bubbles disappear
and a steady stream of oil flows from the bleed port.
Release the lift control to relieve hydraulic pressure.
7.
Replace the bleed port plug and torque to 0.8 Nm
(7 lbf
∙
in).
8.
Raise the hold-down fully, and disengage the hold-down safety props.
9.
Cycle the cylinder 5
–
10 times by fully extending and fully retracting the cylinder. Ensure the hold-down is level
when raising and lowering, and the slave and master cylinders are in sync. Repeat the bleeding process if
necessary.
10. Lower the hold-down.
Содержание PW8
Страница 2: ...PW8 Pick Up Header Published May 2018...
Страница 3: ...Declaration of Conformity Figure 1 EC Declaration of Conformity 214657 i Revision A...
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Страница 145: ...214657 131 Revision A Figure 4 73 John Deere Combine Control Console A Scroll Knob B Check Mark Button AHHC SYSTEM...
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