Section 1: Assembly & Set-up
RC5715 & RCM5715 Rotary Cutters 331-431M
1/20/21
29
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 deck are lowered to the ground and all
hydraulic pressure is relieved before disconnecting any
hydraulic lines or fittings to purge the hydraulic system.
It may be necessary to purge the hydraulic system of
trapped air. Cycle wing and deck lift cylinders back and
forth several times to purge air from them and to determine
if they operating sluggish. Purge any cylinder of air that
continues to operate sluggish.
Purge Wing Fold Cylinder
Refer to Figure 1-28:
1. Lower center deck until it is supported by
flip spacers (#6).
2. Lower wing decks until they are resting on the ground.
3. Shut tractor down before dismounting according to
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 the hydraulic
system, shut tractor down once more according to
7.
Tighten hose fitting (#2) on hydraulic cylinder (#1).
8. Repeat steps 4-7 to purge cylinder (#3).
Purge Deck Lift Cylinder
Refer to Figure 1-28:
WARNING
!
To avoid serious injury or death:
Stay clear from underneath the cutter and directly behind
transport tires. The cutter could fall suddenly causing the
decks to lower and tires to roll back.
1. Move tractor control lever to extend hydraulic lift
cylinder (#4) until pressure against flip spacers (#6)
has been eliminated.
2. Without relieving hydraulic pressure, shut tractor
down before dismounting according to
3. Move flip spacers (#6) from the closed position to
their open position as shown.
4. Restart tractor and retract center deck lift cylinder
until it is fully retracted.
5. Shut tractor down before dismounting according to
6. Move tractor control levers back and forth to relieve
all hydraulic pressure.
7.
Slightly loosen hydraulic hose fitting (#5) on deck lift
cylinder (#4) to allow air to escape.
8. Restart tractor and slowly activate tractor control lift
lever to extend lift cylinder (#4) and to purge trapped
air from the hydraulic system.
9. Once all air has been purged from the hydraulic
system, shut tractor down before dismounting
according to
10. Tighten hose fitting (#5) on lift cylinder (#4).
Purge Wing & Center Deck Cylinders
Figure 1-28
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