Hydraulic ExcavatorRH 120-EService weight 282 tEngine output 1008 kWFace shovel (SAE 1:1) 17 m3Backhoe (SAE 1:1) 15 m32The 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 suc-cessfully working in applications world-wide.With the RH 120-E, O&K Mining con-tinues this story of success by means ofsignificantimprovementsandinnova-tive developments. Comprehensive ex-perience originates from the large O&Kexcavators RH 170 up to RH 400 whichcharacterize the new design.Operatingweightandengineoutputwere enlarged by 13 per cent, the un-dercarriage has been completely rede-signed,anelectronic-hydraulicservocontrol was installed and the oil cool-ing system has been further improved.The service accessibility has also beengreatly improved.The result: Larger bucket capacity, high-er performance, easier controlling andless wear and tear.Maintenance effort has been decreasedto achieve long term availability of morethan 90 per cent.Up to 17 m3 face shovel or backhoeelDepending on the working conditions,theRH120-Ecanbeequippedwithshovel or backhoe attachment.Together with the TriPower advantagestheindividuallydesignedfaceshovelensures best penetration even in toughand interlocked materials. An unusualhigh filling degree is guaranteed with-outbackspill.100shttrucksareloaded with four passes and peak pro-duction up to 3100 t/h is possible.The design of the attachment has beenoptimizedespeciallywiththeback-hoeversion.Thecylinderdiameterswere increased, to achieve 14 per centgrowth in digging forces, which is bene-ficial especially in direct digging oper-ations.TheRH120-Eisassignedforhighestperformance.Bucketsizeandkine-maticsarethebenchmarkinthisex-cavator class.The attachments steel construction is designed forsevere applications. All pivot points are supportedby large-dimensioned castings.O&K was the firstGerman manufacturerof excavatorsto be certified forcompliance withDIN EN ISO 9001.Conformity with theEEC MachineryDirective permits theattachment of theCE sign.34A workplace that boosts productivity.Including electronic-hydraulic servo control.Ample space, easy controlThecabinoftheRH120-Ehasbeenincreased in width by another 300 mmcomparedtoitspredecessor.Itpro-vides maximum space and comfort. Theoperator has an excellent view over theentireworkingareathankstoaneyelevelof6.1m.Thecomfortableandpneumaticallycushionedseatisindi-vidually adjustable to all functional andergonomic requirements.The joystick control according SAE stand-ard allows fast, safe and exact loading.These conditions encourage the readi-ness for a high level performance whichcan be achieved over long periods with-out stress and fatigue.Fast service and high availabilityvia BCSAlloperationandservicedataaremonitored and checked by the Board-Control-Systemandcanbedisplayedonthescreen.Thereforeallimportantinformation is clearly visible, any irre-gularities are immediately detected andthe operator is alerted visually and aud-ibly.Unique fine control by electronichydraulic servo controlAllservofunctionsarecomputer-con-trolled for precise working if required.Moreovertheamountofhydraulichoses is reduced and trouble shooting iseased.512124335678910124811Excellent accessibility for fast serviceRetractable servicestation at rear endBestaccessibilitytoallcomponents (here:engine and oil cooler)Pump Managing System PMSimproves performance preservescomponentsThe patented PMS ensures an optimizedpower adaption between the hydraulicpower demand and power output of theengines.Thereforeoverloadingoftheengines is avoided. PMS permanentlycompares measured operating data withset values and fine tunes pump flow forultimate performance, to achieve con-stant engine speed.Additionally PMS combines automaticrevolution reduction, zero oil flow andflow on demand.Intelligent Cummins-engineswith diagnostic-systemThe Cummins developed electronic en-gine management CELECT provides lowoperatingcostswithhighlifeexpect-ancy at the same time. This system alsoguaranteescompliancetoallexistingemission regulations world-wide.Double independent oil coolingsystemThe O&K hydraulic oil cooling is inde-pendentfromallmaincircuits.Twoindividualthermostaticallycontrolledcircuits for fan drive and cooler oil flowprovide optimized cooling even at idletimes. Together with the patented twin-chamber hydraulic tank highest coolingefficiencyisguaranteed.Thishelpstokeep the hydraulic oil at an ideal tem-peratureevenunderextremecircum-stances. Lower thermal load on the oilandhigherlifetimeofthehydrauliccomponents are vital benefits.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 auto-matic hydraulically driven central lubri-cationsystemisstandardandservesall grease points without exception. Acompressiveairsystemisnolongernecessary.1. Diesel engines2. Gearboxes with hydraulic pumps 3. Engine radiators4. Hydraulic oil coolers5. Hydraulic tank6. Swing drives7. Rotary distributor8. Travel valves9. Batteries10. Operator's seat11. BCS column12. Auxiliary seat6Unique TriPower geometry guaranteesexceptional performanceThe patented O&K triangle formaximum productivityTriPower boosts production, eases oper-ation and reduces wear.The decisive advantages:G Increasing crowd force along the en-tire crowd distanceG Constant bucket angle at each boompositionandrollbacklimiterthuspermanent high fill factorG Automaticparallelbucketguidanceat all levelsG Increased lifting momentumG Pressure free lowering of boom andstick cylindersOnly with TriPowerthe boom momentumremains constant overthe full lifting distance.Hence power is avail-able where it is re-quired.Clear pipe work and SAE flange connections at allhigh pressure hoses. The main valve blocks positionis on top of the boom and reduces hydraulic tubesfrom the uppercarriage to the attachment. This de-sign creates additional space on the superstructurefor outstanding access to slew gearboxes and rotarydistributor.lifting distanceboom momentum100 % 50 %with TriPower7New undercarriagefor tough conditionsThenewlayoutofthebottomrollersontheRH 120-E is reflected in reduced face pressure. Theintroduction of new materials and a high performancelubricant improves lifetime.TheO&Kspecifictransmissionofpoweravoidswear-intensiverelativemovementbetweentrackand sprocket.Encapsulated, powerful two-stage travel motors arethe key for mobility. Easy access to components dueto hinged doors.More weight, more powerThe complete field experience with thelargerO&Kexcavatorshasbeenconsiderable in the development of theRH120-Eundercarriage.Theflowofforces as well as the service friendlinessareconsiderablyimprovedbytheinstallation of unilateral bearings for thetravel gearboxes and their support in aone piece casting. Less welding seamsinhighlystressedareasandthefullyhydraulic self-adjusting track tensioningsystemhavepositiveeffectsonlifeexpectancy.Trackpadandlinkarecombined in one unit, face pressure onthe rollers and therefore wear is clearlyreduced.Each crawler is driven by two powerfulhydraulic motors and can be controlledseparately.Twotravelspeedssecurebest adjustment to changing applicationconditions.ForsuperiorstabilitytheRH120-Escentre of gravity is extremely low. Theengineershadaspecialinterestinpreventingunnecessaryserviceex-penditure.Idlerandallrollersarelifetime-lubricated,thusthecompleteundercarriageisnearlymaintenance-free.Your 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.com www.terex.comM 105.2e/20904Printed in Germany LouisgangRH 120:world-wide the no.1 in its classAlterations 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.