InstallationNotes Remove all dirt, particles and all foreign bodies from flanges connecting inlet and delivery ports. In the case of amono-directional motor check for the direction of rotation of the pump to be consistent with the inlet side. Before starting the systemon a continuous basis, we suggest to adopt some simple precautions. It is essential for correct running, top performance and longer life of the GHM series hydraulic gear motors to follow the installation and running information provided in this catalogue. Ensure that intake of the supply pump and return pipes ends are always below fluid level and as far fromeach other as possible. Some general considerations should be made regarding the hydraulic system, in which the motor 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). Check for the proper alignment of motor shaft and that of the driven part. It is necessary that the connection does not induce axial or radial loads. Protect drive shaft seal duringmotor painting. Check if contact area between seal ring and shaft is clean: dust could cause quicker wear and leakage. Disconnect supply pump drain during startup to bleed air off the circuit. 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. At first startup, set pressure limiting valves at minimum value possible. Do not allow the motor to run at speed lower than minimum allowed with pressure higher than the figures indicated in the ‘PI’ column of model specific data tables. Do not start the systemat low temperatures under load conditions or after long stops. Start the system for a fewminutes and turn on all components. Bleed air off the circuit to check its proper filling. It is widely known that most motors early failures are due to contaminated fluids. The extreme reduction of the tolerances required in the design of the motors 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. Necessary interventions to check and limit contamination should be performed in a preventive and corrective way. Preventive actions include: proper cleaning of the systemduring assembly, deburring, eliminating the welding scumand fluid filtering before filling up. Check fluid level in the tank after loading all components. Lastly, gradually increase pressure, continuously check fluid and moving parts temperatures. Check rotation speed until you reach set operating values that must be within themodel specific limits indicated in this catalogue. CleaningAnd Filtering The System Starting contamination level of system fluid should not exceed class 18/15 (ref. ISO 4406). Even fresh fluids might exceed this contamination level; therefore always pre-filter the fluid when filling up or topping up the system. Fit a proper tank; its capacity should be proportional to the volume displaced in one working minute. Gear Motors GHM Series Installation and Running Information 8 www.jbj.co.uk/gear-motors.html #DriveLineHarmony
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