Hydraulic Excavator RH 120-E - Venequip

Hydraulic ExcavatorRH 120-EService weight282 tEngine output1008 kWFace shovel (SAE 1:1) 17 m 3Backhoe (SAE 1:1) 15 m 3

The new RH 120-E: yet heavier, yet stronger, yet betterAverage production 2,100 t/h.In open pit mining the RH 120 is almosta legend. More than 220 units are successfullyworking in applications worldwide.With the RH 120-E, O&K Mining continuesthis story of success by means ofsignificant improvements and innovativedevelopments. Comprehensive experienceoriginates from the large O&Kexcavators RH 170 up to RH 400 whichcharacterize the new design.Operating weight and engine outputwere enlarged by 13 per cent, the undercarriagehas been completely redesigned,an electronic-hydraulic servocontrol was installed and the oil coolingsystem has been further improved.The service accessibility has also beengreatly improved.The result: Larger bucket capacity, higherperformance, easier controlling andless wear and tear.Maintenance effort has been decreasedto achieve long term availability of morethan 90 per cent.The attachment’s steel construction is designed forsevere applications. All pivot points are supportedby large-dimensioned castings.Up to 17 m 3 –face shovel or backhoeelDepending on the working conditions,the RH 120-E can be equipped withshovel or backhoe attachment.Together with the TriPower advantagesthe individually designed face shovelensures best penetration even in toughand interlocked materials. An unusualhigh filling degree is guaranteed withoutbackspill. 100 sht – trucks areloaded with four passes and peak productionup to 3100 t/h is possible.The design of the attachment has beenoptimized especially with the backhoeversion. The cylinder diameterswere increased, to achieve 14 per centgrowth in digging forces, which is beneficialespecially in direct digging operations.The RH 120-E is assigned for highestperformance. Bucket size and kinematicsare the benchmark in this excavatorclass.Conformity with theEEC MachineryDirective permits theattachment of theCE sign.O&K was the firstGerman manufacturerof excavatorsto be certified forcompliance withDIN EN ISO 9001.2

A workplace that boosts productivity.Including electronic-hydraulic servo control.Ample space, easy controlThe cabin of the RH 120-E has beenincreased in width by another 300 mmcompared to it’s predecessor. It providesmaximum space and comfort. Theoperator has an excellent view over theentire working area thanks to an eyelevel of 6.1 m. The comfortable andpneumatically cushioned seat is individuallyadjustable to all functional andergonomic requirements.The joystick control according SAE standardallows fast, safe and exact loading.These conditions encourage the readinessfor a high level performance whichcan be achieved over long periods withoutstress and fatigue.Fast service and high availabilityvia BCSAll operation and service data aremonitored and checked by the Board-Control-System and can be displayedon the screen. Therefore all importantinformation is clearly visible, any irregularitiesare immediately detected andthe operator is alerted visually and audibly.Unique fine control by electronichydraulic servo controlAll servo functions are computer-controlledfor precise working if required.Moreover the amount of hydraulichoses is reduced and trouble shooting iseased.4

Excellent accessibility for fast servicetimes. Together with the patented twinchamberhydraulic tank highest coolingefficiency is guaranteed. This helps tokeep the hydraulic oil at an ideal temperatureeven under extreme circumstances.Lower thermal load on the oiland higher lifetime of the hydrauliccomponents are vital benefits.Pump Managing System PMSimproves performance preservescomponentsThe patented PMS ensures an optimizedpower adaption between the hydraulicpower demand and power output of theengines. Therefore overloading of theengines is avoided. PMS permanentlycompares measured operating data withset values and fine tunes pump flow forultimate performance, to achieve constantengine speed.Additionally PMS combines automaticrevolution reduction, zero oil flow andflow on demand.Service-friendly modular designThe superstructure is consequently builtup in modules. Fast access to all serviceand maintenance points is provided bythe walk through engine compartment.A retractable service station at the rearend assures convenient changing of allservice fluids from the ground. The automatichydraulically driven central lubricationsystem is standard and servesall grease points without exception. Acompressive air system is no longernecessary.Retractable servicestation at rear endBest accessibility to allcomponents (here:engine and oil cooler)Intelligent Cummins-engineswith diagnostic-systemThe Cummins developed electronic enginemanagement CELECT provides lowoperating costs with high life expectancyat the same time. This system alsoguarantees compliance to all existingemission regulations world-wide.Double independent oil coolingsystemThe O&K hydraulic oil cooling is independentfrom all main circuits. Twoindividual thermostatically controlledcircuits for fan drive and cooler oil flowprovide optimized cooling even at idle488111071246225119331. Diesel engines 2. Gearboxes with hydraulic pumps 3. Engine radiators 4. Hydraulic oil coolers5. Hydraulic tank 6. Swing drives 7. Rotary distributor 8. Travel valves 9. Batteries 10. Operator's seat11. BCS column 12. Auxiliary seat5

Unique TriPower geometry guaranteesexceptional performanceThe patented O&K triangle formaximum productivityTriPower boosts production, eases operationand reduces wear.The decisive advantages:● Increasing crowd force along the entirecrowd distance● Constant bucket angle at each boomposition and roll back limiter – thuspermanent high fill factor● Automatic parallel bucket guidanceat all levelswith TriPowerlifting distanceboom momentum100 % 50 %Only with TriPowerthe boom momentumremains constant overthe full lifting distance.Hence power is availablewhere it is required.● Increased lifting momentum● Pressure free lowering of boom andstick cylindersClear pipe work and SAE flange connections at allhigh pressure hoses. The main valve block’s positionis on top of the boom and reduces hydraulic tubesfrom the uppercarriage to the attachment. This designcreates additional space on the superstructurefor outstanding access to slew gearboxes and rotarydistributor.6

New undercarriagefor tough conditionsEncapsulated, powerful two-stage travel motors arethe key for mobility. Easy access to components dueto hinged doors.The O&K specific transmission of power avoidswear-intensive relative movement between trackand sprocket.More weight, more powerThe complete field experience with thelarger O&K excavators has beenconsiderable in the development of theRH 120-E undercarriage. The flow offorces – as well as the service friendliness– are considerably improved by theinstallation of unilateral bearings for thetravel gearboxes and their support in aone piece casting. Less welding seamsin highly stressed areas and the fullyhydraulic self-adjusting track tensioningsystem have positive effects on lifeexpectancy. Track pad and link arecombined in one unit, face pressure onthe rollers and therefore wear is clearlyreduced.Each crawler is driven by two powerfulhydraulic motors and can be controlledseparately. Two travel speeds securebest adjustment to changing applicationconditions.For superior stability the RH 120-E’scentre of gravity is extremely low. Theengineers had a special interest inpreventing unnecessary service expenditure.Idler and all rollers arelifetime-lubricated, thus the completeundercarriage is nearly maintenancefree.The new layout of the bottom rollers on theRH 120-E is reflected in reduced face pressure. Theintroduction of new materials and a high performancelubricant improves lifetime.7

RH 120:world-wide the no.1 in its classYour Partner:Terex Germany GmbH & Co. KGKarl-Funke-Str. 36 · D-44149 DortmundPhone ++49 231/922-3 · Fax ++49 231/922-5800E-mail: info@terex-ok.dewebsites: www.terex-ok.comwww.terex.comM 105.2e/2–0904Printed in Germany · LouisgangAlterations without prior notice. The illustrations do not necessarily show the standard version of the machine.Printed on environment-friendly paper comprising 50 % recycled paper and50 % paper bleached with zero-percent chlorine.