Land Pride RC5020 - Manual (Page 21)

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Section 1: Assembly & Set-up
RC5020 (540 RPM) and RCM5020 (1000 RPM) Rotary Cutters 318-474M 5/29/13
Table of Contents
Hydraulic Hook-up
The required number of duplex outlets at the tractor is
dependent upon how the cutter is set-up.
The standard cutter is equipped with three hydraulic
cylinders with one in the center for lifting the cutter and
one on each wing for folding the wings simultaneously.
All three cylinders are set-up for single action
(one-way) operation.
Each duplex outlet on your tractor can perform only one
operation. One outlet is needed for lifting the cutter and
one for lifting the wings simultaneously. A third outlet is
required if the wings are lifted independently. This will
also require replumbing the wing hydraulic cylinders.
Your Land Pride dealer can help you determine the best
configuration that will match your needs and your tractor
capabilities. Optional control valve kits are available if the
tractor does not have the required number of duplex
outlets. For additional information, see “Hydraulic
Accessories” on page 30.
!
DANGER
Hydraulic fluid under high pressure can penetrate skin. Wear
protective gloves and safety glasses or goggles when working
with hydraulic systems. Use a piece of cardboard or wood
rather than hands when searching for hydraulic leaks. If
hydraulic fluid is injected into the skin or eyes, it must be
treated by a doctor familiar with this type of injury within a
few hours or gangrene may result. DO NOT DELAY.
Refer to Figure 1-8 on page 16:
1. Route cylinder hoses (#7) through hose support loop
and connect to tractor remote outlets. If the tractor
has a float option on one of the outlets, connect wing
lift hydraulic hose to that outlet and set tractor control
lever for the wing cylinder in float position.
2. Check driveline for adequate clearance under all
ranges of cutter height. With driveline shaft attached
to tractor, slowly raise and lower cutter to its upper
and lower limits while observing clearances between
hitch and driveline. Adjust tractor drawbar height
and/or length if driveline interferes. See Figure 1-1
on page 11 for correct drawbar dimensions.
3. Cycle hydraulic system by raising and lowering
center deck cylinder and wing fold cylinders. It may
be necessary to purge the hydraulic system of
trapped air if operation is sluggish.
Purge Hydraulic System
!
DANGER
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
Be sure center and wing decks are lowered to the ground and
all hydraulic pressure is relieved before disconnecting any
hydraulic lines or fittings between the Rotary Cutter and
tractor hydraulic system.
The wing deck lift cylinder may be purged as follows:
1. With wings lowered to the ground, shut tractor off
and move the wing hydraulic control lever back and
forth to relieve hydraulic pressure at the wing
cylinders.
2. Loosen hydraulic hose fittings slightly at each wing
cylinder to allow air and fluid to escape.
3. Restart tractor and slowly activate tractor control
lever to retract the wing cylinders and to purge
trapped air from the hydraulic system.
4. Once air is purged from the hydraulic system for the
wing cylinders, tighten the hose fittings at each wing
cylinder.
5. Repeat steps 1 to 4 above to purge center deck lift
cylinder. Make sure the cutter skid shoes are resting
on the ground or the lift cylinder is fully retracted
against the stroke control spacers and all hydraulic
pressure is relieved at the lift cylinder before
loosening the lift cylinder hose fitting.