Proper safety devices and reliable instruments to avoid fluid turbulence and prevent air, water or foreign bodies from entering into the system are of major importance. It is also very important to equip the hydraulic systemwith a proper filtering unit. InstallationNotes It is essential for correct running, top performance and longer life of the ALP series hydraulic gear pumps to follow the installation and running information provided in this catalogue. Some general considerations should be made regarding the hydraulic system, in which the pump is to be fitted. Special attention should be given to hydraulic system design and assembly, especially to intake, delivery, return and drain pipes and position of system parts (valves, filters, tanks, heat exchangers and accumulators). Before starting the systemon a continuous basis, we suggest to adopt some simple precautions. In the case of amono-directional motor check for the direction of rotation of the pump to be consistent with the drive shaft (in case of single rotation pump). Check for the proper alignment of pump shaft andmotor shaft. It is necessary that the connection does not induce axial or radial loads. Protect drive shaft seal during pump painting. Check if contact area between seal ring and shaft is clean: dust could cause quicker wear and leakage. Install the pump below head if possible. Fill the pump with fluid, and turn it by hand. At first startup, set pressure limiting valves at min. value possible. Do not start the systemat low temperatures under load conditions or after long stops (always avoid or limit load starting for pump longer life). Ensure that intake and return pipes ends are always below fluid level and as far fromeach other as possible. Remove all dirt, particles and all foreign bodies from flanges connecting inlet and delivery ports. Avoid lower rotation speed thanmin. allowed with pressure higher than P1. Start the system for a fewminutes and turn on all components; bleed air off the circuit to check its proper filling. Check fluid level in the tank after loading all components. Disconnect pump drain during startup to bleed air off the circuit. At last, gradually increase pressure, continuously check fluid and moving parts temperature, check rotation speed until you reach set operating values that shall be within the limits indicated in this catalogue. CleaningAnd Filtering The System Regular checks should be made for contamination of the oil. Preventive actions include: proper cleaning of the system during assembly, deburring, eliminating the welding scumand fluid filtering before filling up. It is widely known that most pump early failures are due to contaminated fluids. The extreme reduction of the tolerances required in the design of the pumps, and therefore their operation with minimum clearances, are heavily influenced by a fluid that is not perfectly clean. It is proved that particles circulating in the fluid act as abrasive agents, damaging the surfaces they touch and increasing the quantity of contaminant. For this reason, ensure that system is perfectly clean during startup and keep it clean for its whole operating life. Starting contamination level of system fluid should not exceed class 18/15 (ref. ISO 4406). Even fresh fluids might exceed this contamination level; therefore Gear Pumps 1P Series Installation and Running Information 8 www.jbj.co.uk/gear-pumps.html #DriveLineHarmony
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