Nittoh UP-35RH-NC Operation And Maintenance Manual
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54 Operation“UP-35RH-NC” with 2-way normally closed solenoid valve, pressure holding type.1 Plug in the pump.2 Depress the control “ON” switch to run the motor to advance the cylinder. If the switchis released, the motor stops and the plunger remains stopped for pressure holding.3 To retract the plunger, depress the “OFF” switch to actuate the normally closed solenoidvalve to return the oil. Note that it is not possible to stop the plunger on the way atdescending stroke.“UP-35RH-NO” with 2-way normally open solenoid valve, auto-return type.1 Plug in the pump.2 Depress the control “ON” switch to run the motor to actuate the normally opensolenoid valve, so the oil is delivered to advance the cylinder.3 If the “ON” switch is released, the motor and solenoid valve stop and the oil is drainedto retract the plunger automatically. (The no-marked switch button is not wired anddoes not work.)“UP-35RH-AR” with differential pressure valve, auto-return type.1 Plug in the pump.2 Depress the control “ON” switch to run the motor to advance the plunger.3 When the “ON” switch is released, the motor stops and the plunger retractsautomatically. Note that the plunger starts to retract lately one beat after the “ON”switch is released, because the pump is fitted with the differential pressure valve,instead of a solenoid valve. (The no-marked switch button is not wired and does notwork.)5 Maintenance5-1 Hydraulic working oil① Kind of oilUse only Nittoh NHO-32 hydraulic oil or an approved, high-grade oil (ISO #32, viscosity :32 cSt @40°C) with these pumps to promote long pump life.② Oil temperatureAptitude temperature for use of hydraulic oil is max. 55 ° C. In case color of thetemperature seal attached to the tank has changed and indicated “55” as below, it hashappened unacceptable rise in oil temperature. Stop working so as to decrease oilstemperature or tank such a measure as installation of an oil cooler.Normal condition In case unacceptable rise in oil temperature |
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