118 Hydraulic System Clean the strainer inside the hydraulic tank after the first 50 hours of use, and once a yearafterwards (see Cleaning the Strainer on page 153). Hydraulic oil must be replaced at least once a year, or when contaminated (see Emptying theHydraulic Tank on page 152).NOTE: The ball valve on the hydraulic tank must be completely open before engaging the pump orstarting the engine.Labrie Enviroquip Group requires that the hydraulic fluid and return oil filter be changed and that thestrainer be cleaned before changing the hydraulic pump.Manufacturer’s warranty on hydraulic pumps provided or sold by Labrie Enviroquip Group could bedeclared void if the hydraulic fluid and return oil filter are not changed, and if the strainer is notcleaned prior to replacing the hydraulic pump.Therefore, it is mandatory to change the return oil filter and clean the strainer after the first 50 hoursof use and then once a year. The hydraulic fluid must be changed once a year. Hydraulic fluidcontamination will severely damage hydraulic components.It is recommended to have the hydraulic fluid tested and analyzed by a lab to prevent hydraulicsystem or pump breakdown. This will also optimize the frequency of hydraulic fluid changes. Labrievehicles are now equipped with an “oil sampler coupler.” For more information, see Testing HydraulicOil on page 100.NOTE: Evidence of maintenance and/or fluid samples could be requested when filing warranty claimsconcerning the hydraulic system or pump.Introducing the Dual Vane PumpA UTOMIZER ™ vehicles are equipped with a dual vane pump. Both sections of the dual vane pump areactivated by two electric solenoid valves. One is mounted on the pump and the other on the chassis(see Figure 5-1). The electrical signal that activates the solenoid is sent by the pump switch on thecontrol panel.Figure 5-1 Vane pump solenoid valve on the pump (1) and on the chassis (2)1 2
