G20/G30 Series Hydraulic Pumps - namyang7.com

1 Hydraulic SYSTEMS DIVISIONO utstanding Hydraulic Products, Service and Expertise, WorldwideG20/G30 Series Hydraulic PumpsReliable, efficient, serviceabledesignHaldex external spur gear, positivedisplacement Pumps are offered insingle, double, triple and and thru-drive Pumps are of athree-section modular design. Frontand rear covers are cast iron for reliability, strength, and sound reduction. A cast iron center sec-tionallows gear tips to generatetheir own run-in paths, creating minimum radial gear-tip clearance forhigh volumetric thru-drive pump is a singlepump with a mounting pad and coupling spline in its rear cover,allowing a second pump to bemounted and driven in double pump consists of twosingle Pumps , each having its ownoutlet port but sharing a commoninlet port and input shaft.

2 This compact unit can, therefore, servetwo separate Hydraulic circuits, orsupply greater volume to a single circuit through the combined deliveryof both offering greater design flexibility to Hydraulic system designers, thru-drive and doublepumps reduce installation costssince they allow multiple pump operation from a single mountingand drive point. Also, double pumpsrequire only one inlet line, comparedto the two required when separatepumps are , economical portingarrangementsA large selection of port sizes and positions allows greater systemdesign flexibility, provides the meansfor reducing costs through simplifiedplumbing arrangements, and facilitates the interchangeability ofHaldex and competitive 4-bolt split flange ports andSAE straight thread ports are of shafts, rotation and couplingsSplined SAE side-fit drive shafts arestandard.

3 Other popular shafts are available. Pumps are assembled foreither clockwise or Pumps are provided with output drive couplings that mate withsplined SAE side-fit drive many mounting requirementsSAE standard wet flange mountingsand single or double shaft seals areavailable on all Pumps . Mountingpads meet SAE standards and areavailable in several sizes and typesto satisfy various mounting require-ments and to facilitate interchange-ability of Vickers and shaft seals are ideal for applications where the pump pilotand shaft extend into a transmissioncase or crankcase. If either sealfails, the pump fluid remains separated from the transmission orcrankcase fluid. Leakage past eitherseals drains to the exterior of thepump. The double seal feature thusreduces system downtime by preventing the mixing of different flu-ids and providing for visual detectionof seal inlet of the thru-drive pump isopen to the pump s rear couplingarea, requiring that mating pumpshave a wet-flange mounting.

4 If therear mounting pad is capped insteadof used to mount a pump, it must besealed to prevent fluid leakage andentrance of duty constructionThe drive gear and drive shaft areone piece construction, as are thedriven gear and shaft, to eliminatethe potential problems of fretting andstress fatigue associated with two-piece construction. The one-piecedesign also allows the use of largediameter journals and bearings forgreater load-carrying are of AISI 8620 alloy steel forgreater shaft strength and a strongergear assembly. Gears have tenteeth to minimize pressure ripple,and gear sides and shaft journals arecarburized, hardened, and ground toa fine Pumps large teflon impregnatedbronze bearings are installed in precision bored covers for optimumshaft alignment.

5 They provide alarge support area that keeps bearing pressures low enough tohandle most indirect drives. Forapplications imposing very high sideloads, consult your Haldex :This catalog features our most standard single, double and triple pump capabilities. Other pump options and multiple pump combinations areavailable. Please contact factory or your Haldex representative for information. See bottom of page 45 for contact , FEATURES AND BENEFITS2 Pictures on front cover are used with the kind permission of eg: Atlet, BT, Huddig, Scania, Toro and Volvo Construction BEARING SYSTEMM inimum leakage and wearHaldex Pumps utilize two seal packs andtwo wear plates to minimize leakageacross the end faces of the gears and toreduce wear. During startup, the sealpacks mechanically preload and seal acantilever section of the plates againstthe ends of the gears.

6 The seal packs also establish the wearplate area exposed to system pressure,allowing axial pressure loading and bal-ancing of the cantilever sections. Aspressure increases, the sections deflect toward the gear faces to reduce clearances and balance opposing axial forces. Running clearances are main-tained small enough for mimimum leak-age across the faces, yet large enoughto maintain the oil film required to mini-mize wear of mating imbalance( Hydraulic load).Fixed end(minimumdeflection).Shaftdeflection(e xaggerated).Fixed end(minimumdeflection).Tapered for deflectionBearings and support structures movein unison with, and adjust to, shaftsthat are deflected by high hydraulicloads. Optimum bearing alignment,under load, maintains the large-areabearing support required for minimumwear and maximum life of bearingsand sealing glandmade of rubber or Viton*.

7 Glass-filled nylon retainerprevents extrusion of sealinggland, has high temperaturestability. Flat side facessteel side of wear plate.* Registered trademark of DuPont pressure meteringnotches reduce pulsations, quiet pumpand providesforced-feed bearing surfacefaces gears,resists notchesreduce pressure spikes, quiet PumpPERFORMANCE SPECIFICATIONS for G20/G30 PUMPS4 Singleandthru-drivepumpsModelseriesG20an dGT20G30andGT30 Pumpsize79111315171921242718212528303235 404550cc23293643485562687787586880919710 4113129145161cu. *100080060060060060060060060060060060060 0600600600600600600600 @ratedpressure &.17 bar (5 Hg)vacuum inletMinimumspeed @ratedpressureTypicaldelivery@ ratedspeed &pressureTypicalinputpower @ ratedspeed &pressureDoublepumpmodelseriesG2020G3020 G3030 Same as for G20 and GT20 as for G30 and GT30 pumpCover-end pumpPump sizes and ratings * Lower speeds are permissable when operating below rated as for G20 and GT20 as for G30 and GT30 above.

8 Rated speed of double pump is governedby pump with lower speed rating. If deliveriesof both Pumps are combined, rated pressureis governed by pump with lower pressure on displacement, speed andpressure, volumetric efficiency is 81-98%and overall efficiency is 71-92% with SAE10W oil at 49 C (120 F).Inlet conditionsPressure on the inlet should not exceed 1bar (15 psi). Under continuous operation,inlet vacuum should not exceed bar(5 Hg).Operating temperatureUnder continuous operation, a maximumof 96 C (205 F) is recommended. Themaximum temperature for cyclic or inter-mittent operation is 107 C (225 F).Fluids and filtrationFor applications requiring fire resistant flu-ids, water glycols, water in-oil emulsionsand synthetics may be used at slightlyreduced ratings.

9 Fluid should be selectedwith an operating viscosity similar to thepetroleum oil described above. For appli-cation assistance, consult your Haldex system should be filtered to provide anISO code (proposed) cleanliness level of19/16. A 10-micron filter sized to accom-modate full system return line flow, is rec-ommended for most operating environ-ments. Severe conditions may requiregreater efficiency from the OF CONTENTSD escription, Features and Benefits ..2 & 3 Specifications and Application Data ..4 Installation Dimensions / Model CodesG20 ..6 - 7G30 ..8 - 9GT20 ..10 - 11GT30 ..12 - 13G2009 ..14 - 15G2020 ..16 - 17G3020 ..18 - 19G3030 ..20 - 21G202020 ..22 - 23G303030 ..24 - 25G200909 ..26 - 27G202009 ..28 - 29G302020 ..30 - 31G303020.

10 32 - 33GT2020 ..34 - 35GT30(41) ..36 - 37GT3030 ..38 - 39 Rear Couplings for Thru-Drive Pumps ..40 Rear Mounting Flanges for Thru-Drive Pumps ..41 Mounting Flanges ..42 Drive Shafts ..43 Performance Curves ..44 Haldex Product Offering .. (in.) (in.).37[ ].50[ ]A [ ] [ ]2X .56[ ]2X .88[ ] [ ] [ ] [ ][ ] (mm) (mm) (mm) (in.) [ ] [ ]FRONT VIEWSIDE VIEWREAR VIEWAll dimensions shown are for referenceonly. Consult factory for your :(F3)- G20- W- 2 -D- 15-B -1- A -12- A- 61- LModel Code for G20 Series Single PumpsSpecial SealsSeriesMount TypeFront CoverInlet PortDisplacementsOutlet PortRear CoverShaft SealDrive ShaftPort LocationsDesignRotation1 2 345678910111213710 (Drive Shaft)Order CodeDescription1 SAE "B" Straight Keyed, .875" Diameter, " Keyed with Thread (.)