battioni Pagani WPT Série Notice D'emploi Et D'entretien page 72

Instruction Manual
for WPT, KTS, KPS, KTM, WSM series use and maintenance
TANK: Tank capacity must be sufficient for the system's operating conditions ( ~ 3 times the amount of oil in circulation). To avoid
overheating of the fluid, a heat exchanger should be installed if necessary. The intake and return lines in the tank must be spaced
apart (by inserting a vertical divider) to prevent the immediate re-suction of the return-line oil.
LINES: The lines must have a major diameter which is at least as large as the diameter of motor or pump ports, and must be perfectly
sealed. A length of flexible tubing is recommended to reduce the transmission of vibrations. All return lines must end below the
minimum oil level, to prevent foaming.
FILTERS: We recommend filtering the entire system flow rate.
HYDRAULIC FLUID: Use hydraulic fluid conforming to ISO/DIN standards. Avoid using mixtures of different oils which could
result in decomposition and reduction of the oil's lubricating power.
DRAIN HOLE: On bi-directional motors with drain hole, the hole has to be connected to the oil tank through a hose of at least 22
mm of diameter. To avoid the forming of foam inside the tank, the hose has to be connected under the minimum level.
STARTING UP: Check that all circuit connections are exact and that the entire system is completely clean. Insert the oil in the
tank, always using a filter. Bleed the circuit to assist in filling. Set the pressure relief valves to the lowest possible setting. Turn on
the system for a few moments at minimum speed, then bleed the circuit again and check the level of oil in the tank. If the difference
between pump or motor temperature and fluid temperature exceeds 10 °C, rapidly switch the system on and off to heat it up gradually.
Then gradually increase the pressure and speed of rotation until the pre-set operating levels as specified in the catalogue are attained.
PERIODICAL CHECKS – MAINTENANCE: Keep the outside surface clean. Replace filters regularly to keep the fluid clean.
The oil level must be checked and replaced periodically depending on the system's operating conditions.
PROBLEMS SOLUTIONS: If the circuit is open (that is, if oil tank and not the pump is placed downstream of the engine) if the
engine remains in rotation with the engine off there would not be overpressure, but cavitation. To solve the problem use a one-way
valve which with calibration takes back the oil, or part of, from the engine outlet to its intake in order to prevent the engine pumping air.
- If the circuit is closed, in fact there could be overpressure. To solve the problem either place an overpressure valve, as recommended
in the attached plant diagram, or a calibrated one-way valve that partly bypasses the engine. Compared to the first solution, the latter
is cheaper and less invasive on an existing system because it does not require an additional hole in the tank.
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