Section 1: Assembly & Set-up
RC(M)5020 Series 2 (S/N ) Rotary Cutter 334-437M
11/13/18
23
Purge Hydraulic System
DANGER
!
To avoid serious injury or death:
Never remove or install a folding wing cylinder with cylinder
rod retracted and wing folded up. The wing is unstable without
its folding cylinder and can suddenly fall. Also, air trapped in
a new or repaired cylinder will drop the wing suddenly when
lowering the wing. Either situation can render the cutter
inoperable and cause serious bodily injury or death.
WARNING
!
To avoid serious injury or death:
Be sure center and wing decks are lowered to the ground and
all hydraulic pressure is relieved before disconnecting any
hydraulic lines or fittings to purge the hydraulic system.
Wing Fold Cylinder
1.
Lower center deck until it is supported by stroke
control spacers (#6) on hydraulic cylinder (#4).
2. Lower wing decks until they rest on the ground.
3. Shut tractor down properly and move wing lift control
lever back and forth to relieve all hydraulic pressure.
See
4. Slightly loosen hydraulic hose fitting (#2) on right-
hand wing cylinder (#1) to allow air to escape.
5. Restart tractor and slowly activate tractor control
lever to retract wing cylinder (#1), and purge trapped
air from the hydraulic system.
6. Shut tractor down properly. See
7.
Tighten hose fitting (#2) at right-hand wing cylinder.
8. Repeat steps 4-7 above to purge the left-hand wing
cylinder (#3).
Deck Lift Cylinder
1.
Remove all hydraulic stroke control spacers (#6) and
lower center deck.
2. Shut tractor down properly and move deck lift control
lever back and forth to relieve all hydraulic pressure.
See
3. Slightly loosen hydraulic hose fitting (#5) on deck lift
cylinder (#4) to allow air to escape.
4. Restart tractor and slowly activate tractor control lift
lever to extend lift cylinder (#4) and purge trapped air
from the hydraulic system.
5. Shut tractor down properly. See
6. Tighten hose fitting (#5) on lift cylinder (#4).
Purge Wing & Center Deck Cylinders
Figure 1-22
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