Hardi COMMANDER 4500, Instruction Book

Page: 54 / 170

4 - Sprayer Setup
52
Hydraulic System
General Info
Ensure that the snap couplers are clean before connection!
After having operated the boom and the system has been filled with oil, check the tractor’s hydraulic oil level and top up if
necessary.
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DANGER! Test of the hydraulic system should be done very cautiously. There may be air trapped in the system which
can cause violent movements of the boom.
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DANGER! Hydraulic leaks: Never use your fingers to locate a leakage in any part of the hydraulic system. Due to high
pressure, hydraulic oil may penetrate the skin.
Requirements for Tractor
The hydraulic system requires:
•
One double-acting outlet for the electro-hydraulic operation of the boom functions.
•
One double-acting outlet for operating the FlexCapacity pump (optional equipment).
•
One double-acting outlet for operating the hydraulic support leg (CM 5500/7000).
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ATTENTION! The hydraulic hoses are marked with arrows to indicate the direction of oil flow. The hoses must be
hooked up to the correct outlet for the hydraulics to function properly (pressure hose to pressure outlet, return hose
to tank outlet).
•
Oil flow between 7 - 24 gal/min (25 and 90 l/min) and a minimum pressure of 2600 p.s.i. (180 bar).
•
Maximum permissible oil pressure is 3000 p.s.i. (210 bar).
•
Return flow restriction of the connected tractor must be maximum 145 p.s.i. (10 bar).
•
For Load Sensing systems, an oil flow of approximately 1.3 gal/min (5 l/min) at 360 p.s.i. (25 bar) is supplied by the
sprayer hydraulics. If a greater flow is required, a different orifice must be installed between the “open center” hydraulic
block and the load sensing (LS) hydraulic line - see “Open and Closed Center Hydraulics” on page 53 for more
information.