MacDon 3020 Pull-Type Windrower - Manual (Page 55)

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MAINTENANCE/SERVICE
HYDRAULICS (continued):
NOTE: Leakage at center reel lift cylinder may be
caused by excess oil in system. If so, bleed excess
oil through R/H cylinder bleed screw.
Removal of Header lift Cylinder
WARNING: Should it be necessary to
remove the header lift cylinder,
stored energy in the header float
torsion bars must be released before removing
cylinder pins.
Proceed as follows:
1. Support cutterbar on blocks about 6 inches
(150 mm) off the ground.
2. Back off float adjusting screw until there is no
contact. Do not completely remove screw. See
"Header Flotation" in this section.
3. Proceed with cylinder removal.
HYDRAULIC FLOW CHART - 36 ft. UNIT