Section 1: Assembly & Set-up
RC(L)4710 & RCM(L)4710 Rotary Cutters 334-863M
7/31/20
25
Purge Hydraulic System
DANGER
!
To prevent 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 prevent serious injury or death:
Be sure center and wing deck are lowered to the ground and all
hydraulic pressure is relieved before loosening any hydraulic
lines or fittings to purge the hydraulic system.
Wing Fold Cylinder
Refer to Figure 1-26:
1. Lower center deck until it is supported by stroke
control flip spacers (#5) on hydraulic cylinder (#3).
2. Lower wing deck until deck is resting on the ground.
3. Shut tractor down properly before dismounting
15. Now move tractor control levers back and forth to
relieve all hydraulic pressure.
4. Slightly loosen hydraulic hose fitting (#2) on wing
cylinder (#1) to allow air to escape.
5. Restart tractor and slowly activate tractor control lever
to retract wing cylinder (#1), and to purge trapped air
from the hydraulic system.
6. Once all air has been purged from hydraulic system,
properly shutdown tractor once more.
7.
Retighten hose fitting (#2) on wing cylinder (#1).
Deck Lift Cylinder
Refer to Figure 1-26:
1. Move all hydraulic stroke control flip spacers (#5) to
open position, then proceed to lower center deck.
2. Shut tractor down properly before dismounting
according to
page 15. Now move tractor control levers back and
forth to relieve all hydraulic pressure.
3. Slightly loosen hydraulic hose fitting (#4) on deck lift
cylinder (#3) to allow air to escape.
4. Restart tractor and slowly activate tractor control lift
lever to extend lift cylinder (#3) and to purge trapped
air from the hydraulic system.
5. Now, shut tractor down properly again.
6. Retighten hose fitting (#4) on lift cylinder (#3).
Purge Wing & Center Deck Cylinders
Figure 1-26
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