L/K Motors SAE Mount Service Manual
Contents
1. Al WARNING may result in injury 7 Tip helpful suggestion CAUTION may result in damage to product or F Lubricate with hydraulic fluid property A Reusable part Apply grease petroleum jelly fi Non reusable part use a new part Ea Apply locking compound a Non removable item z Inspect for wear or damage Option either part may exist A Clean area or part Superseded parts are not interchangeable A Be careful not to scratch or damage F Measurement required g Note correct orientation 7 Flatness specification Z Mark orientation for reinstallation y Parallelism specification z Torque specification O External hex head A Press in press fit Internal hex head GJ Pull out with tool press fit O Torx head Cover splines with installation sleeve O ring boss port O Pressure measurement gauge location or specification The symbols above appear in the illustrations and text of this manual They are intended to communicate helpful information at the point where it is most useful to the reader In most instances the appearance of the symbol itself denotes its meaning The legend above defines each symbol and explains its purpose Design K and L Frame Variable Motors KV LV are low to medium power two position axial piston motors incorporating an integral servo piston They are designed for operation in bo2. E101 061 Inspect the components Inspect the new seal the motor housing seal bore and the sealing area on the shaft for rust wear and contamination Polish the shaft and clean the housing if necessary Install the new shaft seal 1 Cover the shaft splines with an installation sleeve to protect the shaft seal during installation 2 Install a new shaft seal with the cupped side facing the motor Press seal into housing until it bottoms out Press evenly to avoid binding and damaging the seal 3 Install seal support washer 4 Install snap ring 5 Remove the installation sleeve Speed sensor replacement Remove the speed sensor 1 Disconnect the speed sensor electrical connector 2 Using an 11 16 wrench loosen the locknut 3 Using a 1 2 inch wrench remove the speed sensor and o ring from the motor 520L0629 Rev DA November 2014 15 Service Manual K and L Frame Variable Motors SAE Mount Minor repair Replacing the speed sensor P104 359E Install the new speed sensor 1 Turn speed sensor with o ring in CW by hand until bottom end gently touches the speed ring 2 Back out speed sensor CCW 1 4 turn Continue backing out until the flats are 22 either side of the motor shaft center line 20 to 30 is acceptable Do not back out more than 3 4 turn from touching bottom 3 Using a 1 2 inch wrench to hold the speed sensor torque the lock nut to 13
3. Mount SAE B LV KV Cartridge LC KC Motor type Inline axial piston positive displacement two speed variable motors Displacement Rotation L 25 30 or 35 cm3 1 50 1 83 or 2 14 in3 K 38 or 45 cm3 2 32 or 2 75 in3 Bidirectional Installation position Discretionary Housing must always be filled with hydraulic fluid Porting SAE O ring boss axial or twin radial SAE O ring boss twin radial Output shafts Splined 13 or 15 tooth 16 32 pitch 0 875 in straight keyed and 1 8 taper Splined 13 or 15 tooth 16 32 pitch Control options Single or dual line hydraulic control Single line hydraulic control Displacement limiter Fixed maximum and minimum displacement limiters available Speed sensor Available on L Frame SAE B motors in development on K frame and cartridge motors Loop Flushing Valve Available Specifications Parameter Unit L25 L30 L35 K38 K45 Displacement maximum cm in3 25 1 50 30 1 83 35 2 14 38 2 32 45 2 75 Weight cartridge and SAE B kg lb 15 4 34 Mass moment of inertia of rotating kg m2 0 001666 0 001582 0 001530 0 002326 0 002286 components slug ft2 0 001229 0 001167 0 001128 0 001716 0 001687 Theoretical torque Nem bar 0 40 0 48 0 56 0 60 0 72 Ibf in 1000psi 244 293 347 366 439 Operating parameters Parameter Un
4. Calibrate pressure gauges frequently to ensure accuracy Use snubbers to protect gauges Port locations and gauge installation For economical reasons the KV LV motors do not contain any designated gauge installation ports All pressure measurements can be obtained by installing tee fittings to the connections at the locations listed in the table drawing below Recommended gauge sizes are also listed Port information Port identifier Size Pressure obtained Gauge size bar psi X1 0 5625 18 UNF 2B Control signal 600 10 000 X2 0 5625 18 UNF 2B Control signal 600 10 000 L1 0 750 16 UNF 2B Case drain 10 100 L2 0 750 16 UNF 2B Case drain 10 100 A 1 0625 12 UNF 2B System pressure 600 10 000 1 0625 12 UNF 2B System pressure 600 10 000 Twin radial port locations Control port X2 Case drain port L1 System pressure port A Control port X1 Case drain port L2 P104 240E 10 520L0629 Rev DA November 2014 Service Manual K and L Frame Variable Motors SAE Mount Pressure measurements Axial port locations System pressure port A System pressure port B O 7 Control port X1 Case drain port L2 P104 242E 520L0629 Rev DA November 2014 Service Manual K and L Frame Variable Motors SAE Mount Initial start up procedures Gener
5. The anti cavitation valve is installed into the high pressure port The high pressure port depends on motor rotation If rotation is counterclockwise the high pressure port is A If rotation is clockwise the high pressure port is B 1 Using a 5 16 in internal hex wrench remove valve plug E061 Remove and discard O ring E063 2 Remove spring E012 and relief valve E011 from end cap 3 Using a 5 16 in internal hex wrench remove plug E020 Remove and discard O ring E020A Anti cavitation valve Counter Clockwise rotation shown Anti cavitation valve is installed in port A P108 714E Inspect the components Inspect sealing area for rust wear or contamination Check spring E012 and relief valve E011 for wear and damage Relief valve E011 is non serviceable replace as complete unit if damaged Install the anti cavitation valve 1 Lubricate and insert relief valve E011 and spring E012 in original location 2 Lubricate and install new O ring E063 on valve plug E061 3 If needed lubricate and install new O ring E020A on plug E020 4 Using a 5 16 inch internal hex wrench to install valve plug E061 into port with relief valve E011 Torque to 80 Nem 59 Ibf ft 5 If needed using a 5 16 inch internal hex wrench to install plug E020 into port without relief valve E011 Torque to 80 Nem 59 lbfeft 520L0629 Rev DA November 2014 19 Products we offer e Bent Axis Motors e Clos
6. a service procedure Protect yourself and others from injury Take the following general precautions whenever servicing a hydraulic system Unintended machine movement A Warning Unintended movement of the machine or mechanism may cause injury to the technician or bystanders To protect against unintended movement secure the machine or disable disconnect the mechanism while servicing Flammable cleaning solvents A Warning Some cleaning solvents are flammable To avoid possible fire do not use cleaning solvents in an area where a source of ignition may be present Fluid under pressure A Warning Escaping hydraulic fluid under pressure can have sufficient force to penetrate your skin causing serious injury and or infection This fluid may also be hot enough to cause burns Use caution when dealing with hydraulic fluid under pressure Relieve pressure in the system before removing hoses fittings gauges or components Never use your hand or any other body part to check for leaks in a pressurized line Seek medical attention immediately if you are cut by hydraulic fluid Personal safety A Warning Protect yourself from injury Use proper safety equipment including safety glasses at all times 520L0629 Rev DA November 2014 Service Manual K and L Frame Variable Motors SAE Mount Introduction Symbols used in Danfoss literature
7. jog the prime mover or run at the lowest possible speed until system pressure builds to normal levels minimum 11 bar 160 psi Once system pressure is established increase to full operating speed If system pressure is not maintained shut down the prime mover determine cause and take corrective action Refer to Troubleshooting page 13 7 Operate the hydraulic system for at least fifteen minutes under light load conditions 8 Check and adjust control settings as necessary after installation 9 Shut down the prime mover and remove the pressure gauge Replace plug at the charge pressure gauge port 10 Check the fluid level in the reservoir add clean filtered fluid if necessary The motor is now ready for operation 12 520L0629 Rev DA November 2014 Service Manual K and L Frame Variable Motors SAE Mount Fluid and filter maintenance Recommendations To ensure optimum life of KV LV products perform regular maintenance of the fluid and filter Contaminated fluid is the main cause of unit failure Take care to maintain fluid cleanliness when servicing Check the reservoir daily for proper fluid level the presence of water and rancid fluid odor Fluid contaminated by water may appear cloudy or milky or free water may settle in the bottom of the reservoir Rancid odor indicates the fluid has been exposed to excessive heat Change the fluid immediately if these conditions occur Correct the problem immediately
8. produce vibrations that could result in system noise Ensure that the correct coupling is used and that it fits properly onto the shaft Inspect the output shaft alignment Misaligned shafts create excessive frictional vibration that could result in system noise Ensure that the shafts are properly aligned Hydraulic oil viscosity above limits Viscosity above acceptable limits will result in cavitation that would lead to system noise Replace hydraulic oil with appropriate fluid for operating conditions Refer to publication 5200L0463 for information on fluid selection System operating hot Item Description Action Check oil level in reservoir and oil supply to the pump Insufficient amount of hydraulic fluid will not meet the cooling demands of the system Fill the reservoir to the proper level Inspect the heat exchanger if so equipped Check the system relief valves If the heat exchanger fails or becomes obstructed it may not meet the cooling demands of the system If a system relief valve becomes unseated for an extended period of time or fails for any other reason the system could become overheated Ensure that heat exchanger is receiving adequate air flow and that the heat exchanger is in good operating condition Repair or replace as necessary Repair or replace any malfunctioning relief valves as applicable and verify that the loads on the machine
9. C W ENEE EA E T E E E ENTE 7 Features and options ma Specifications sae Operating parameters wisi Fluid specifications saf Features Displacement limiter ssysccsvsccasasstesessensascyscasstascstacodacoscvasstsusecstuecacoteasstuatsdossssu AE a E a 9 UNTO SNAS aE IN A NN ERE RTE 9 olaa Aa ETA A E E E E E E N E E 9 Control orifiCiN Gisserot iiris ina sieadusccelustuatsgnstetepassnscadsaleovetcclessdebanstenvep stassiquasiearane 9 Pressure measurements Required COOIS sseseccsescesseseecseeeseees 10 Port locations and gauge installation scscssssssccsssccssecssssssccsseecssseeessseccssueeessuscessseesssueecsneesesueeessucessuseeesaseessneesssueessnseeseee 10 Initial start up procedures General anssen nnsa t a E AE sesh ESETE aTa TEO EE EE 12 Stant UP ProCeed UNE anino iria aE S ENAN TOTO E TA AARONO 12 Fluid and filter maintenance RECOMMENCATIONS sccsssssssssessessesssesssessecssesssesssessesssessscssesasessscssesenessssesessuesssessessuceasssusessessseeasssscsssessecasccaseesesssesseesseesseeaseaseessees 13 Troubleshooting Excessive noise and or vibration System operating hot Won t Shift or slow tO SHift essessessesssesssesssessesssessesssesssessscssecssessssssssssessscssssssesssessscsseseseesssssesasessscssesssccasssneessessseeseeaseesseeseess Minor repair Shaft seal replace Ment esccssssscssssscsseccessseccsnssecssecssssseccsneessssceessseccssueecsssecessscesssueeccsnecsss
10. Change the fluid and filter per the vehicle machine manufacturer s recommendations or at these intervals Fluid and filter change interval Reservoir type Max oil change interval Sealed 2000 hours Breather 500 hours Change the fluid more frequently if it becomes contaminated with foreign matter dirt water grease etc or if the fluid is subjected to temperature levels greater that the recommended maximum Dispose of used hydraulic fluid properly Never reuse hydraulic fluid Change filters whenever the fluid is changed or when the filter indicator shows that it is necessary to change the filter Replace all fluid lost during filter change 520L0629 Rev DA November 2014 13 Service Manual K and L Frame Variable Motors SAE Mount Troubleshooting Excessive noise and or vibration Item Description Action Check oil level in reservoir and oil supply to the motor Insufficient hydraulic fluid could lead to cavitation that would cause system noise Fill the reservoir to the proper level and ensure that oil supply to the motor is adequate and the lines are unobstructed Check for air in the system Air trapped within the system lines or the motor itself could result in cavitation that would cause system noise Ensure that all of the system lines and components are purged of air Inspect the output shaft couplings A loose or incorrect shaft coupling will
11. KV LV motors have one of the following shafts For dimensions refer to L and K Frame Variable Motors Technical Information 520L0627 e 13 tooth spline 16 32 pitch ANSI B92 1 1970 Class 5 e 22 225 mm 875 in Straight keyed e 22 225 mm 875 in 1 5 Taper e 15 tooth spline 16 32 pitch ANSI B92 1 1970 Class 5 KV LV motors are designed to operate in two positions maximum and minimum displacement The motors are spring biased to maximum displacement and hydraulically shifted to minimum displacement KV LV motors can operate with a single line or dual line control Control input pressure limits Single line control 14 to 69 bar 200 to 1000 psi Dual line control 14 to 35 bar 200 to 500 psi Pressure applied at port X1 shifts the motor to minimum displacement Pressure at X2 can assist the shift to maximum displacement Refer to the table above for control input pressure range Control orificing Motors with single line controls can have optional internal supply and drain orifices installed to regulate control response times Motors with dual line controls rely on external valving and orificing to regulate shift speeds 520L0629 Rev DA November 2014 Service Manual K and L Frame Variable Motors SAE Mount Pressure measurements Required tools The service procedures described in this manual can be performed using common mechanic s hand tools Special tools if required are shown
12. MAKING MODERN LIVING POSSIBLE Denfs Service Manual Closed Circuit Axial Piston K and L Frame Variable Motors SAE Mount powersolutions danfoss com Service Manual K and L Frame Variable Motors SAE Mount Revision history Table of revisions Date Changed Rev November 2014 Danfoss layout DA May 2013 Add Anti Cavitation Valve CB October 2010 Minor edits new back page CA November 2006 Added loop flushing valve B July 2004 First edition A 2 520L0629 Rev DA November 2014 Service Manual K and L Frame Variable Motors SAE Mount Contents Introduction Overview Safety precautions Unintended machine MOVEMENC ssssesscscsssesssesssesescssstsessssssesessesstsesessnsessseesneessessnsssessesseessssnsessssessesesecenseessesseeseeensess 4 Flammable cleaning SOIVENtS cscccssscsssssscsseccssseessssececssecessusecsssecessseesssueecsssecssnssecsssecsesuecssuecessueesssuseessueesesuseessneeessueecsenees 4 Fluid under pressure Personal safety Symbols used in Danfoss literature esscssessccssssccsseesesssecsssessesseccsusecssuseessnseessueesesucessuseeesusecssusecssnsesesasecssueesesuseersneessueeessaees 5 PQ QS IGM A A E S E A E A E A T 5 The Syst m CUCU ites ccc casccccasesacacagvssczagu lsctsqadcaaevesacecesasetesacgestecegdiudh ceasvnsavecpensacd equssestgeisdiaryuussaccasentte asbunrcedadiiteaayenrteccqiaicaass 6 Technical specifications VSR VI
13. Nem 10 Ibf ft with an 11 16 inch wrench 4 Plug in electrical connection and start machine to test for proper operation 16 520L0629 Rev DA November 2014 Service Manual K and L Frame Variable Motors SAE Mount Minor repair Speed sensor adjustment Loop flushing valve Installing the speed sensor Gap Magnetic speed ring Speed sensor I Shaft centerline Shaft centerline P104358 Adjustment and troubleshooting 1 Wire configuration Red Power White Speed signal Black Ground common Green Direction 2 Speed signal Check for speed output using a Volt Ohm Meter VOM Place VOM across the ground and speed pins or terminals Black Ground White Speed Signal and set VOM to the DC Volt scale and low range To check for an output turn pump or motor very slowly by hand or check output just as the prime mover is coming to a stop Note a voltage pulse at meter It will likely be difficult to read exact simply note a pulse approximately 60 pulses per rev If there is no indication of a pulse repeat installation steps and recheck 3 Directional signal Check for a direction signal change using a VOM Use the same VOM setup as in the above speed signal check Turn the motor slowly and note a polarity change on the VOM display as you change the motor direction Remove the loop flushing valve 1 Using a 11 16 in internal hex wrench remove plug E020 and E010 2 Using a 1 4 i
14. al Start up procedure Follow this procedure when starting up a new motor installation or when restarting an installation in which the motor has been removed A Warning Unintended movement of the machine or mechanism may cause injury to the technician or bystanders To protect against unintended movement secure the machine or disableMMisconnect the mechanism while servicing Prior to installing the motor inspect for damage incurred during shipping Make certain all system components reservoir hoses valves fittings heat exchanger etc are clean prior to filling with fluid 1 Fill the reservoir with recommended hydraulic fluid Always filter fluid through a 10 micron filter when pouring into the reservoir Never reuse hydraulic fluid 2 Fill the inlet line leading from the pump to the reservoir Check the inlet line for properly tightened fittings and be certain it is free of restrictions and air leaks 3 Fill the pump and motor housing with clean hydraulic fluid Pour filtered oil directly into the upper most case drain port 4 To ensure the pump and motor stay filled with oil install case drain lines into the upper most case drain ports 5 Install a 0 to 35 bar 0 to 500 psi gauge in the charge pressure gauge port of the pump to monitor system pressure during start up Follow recommendations in the vehicle machine operator s manual for prime mover start up procedures 6 While watching the pressure gauge
15. are at work so is Danfoss We offer expert worldwide support for our customers ensuring the best possible solutions for outstanding performance And with an extensive network of Global Service Partners we also provide comprehensive global service for all of our components Please contact the Danfoss Power Solution representative nearest you Local address Danfoss Power Solutions Danfoss Danfoss Shanghai Co Ltd Power Solutions GmbH amp Co OHG Power Solutions ApS Building 22 No 1000 Jin Hai Rd Krokamp 35 Nordborgvej 81 Jin Qiao Pudong New District DK 6430 Nordborg Denmark Phone 45 7488 2222 Shanghai China 201206 Phone 86 21 3418 5200 Danfoss can accept no responsibility for possible errors in catalogues brochures and other printed material Danfoss reserves the right to alter its products without notice This also applies to products already on order provided that such alterations can be made without changes being necessary in specifications already agreed All trademarks in this material are property of the respective companies Danfoss and the Danfoss logotype are trademarks of Danfoss A S All rights reserved 520L0629 Rev DA November 2014 www danfoss com Danfoss A S 2014
16. are not excessive Won t shift or slow to shift Item Description Action Check the signal line to the servo control port Obstructed or restricted flow through the servo control signal lines could result in slow shift or no shift conditions within the motor Ensure that the signal lines are not obstructed or restricted and that signal pressure is adequate to shift the motor Check that the correct supply and drain orifices are properly installed and are not obstructed Supply and drain orifices determine the shift rate of the motor The smaller the orifice the longer the time it takes to shift the motor Obstruction will also increase shift times Ensure that the proper control orifices are installed in the motor and verify that they are not obstructed Clean or replace as necessary 14 520L0629 Rev DA November 2014 Service Manual K and L Frame Variable Motors SAE Mount Minor repair Shaft seal replacement Remove the shaft seal 1 Remove the snap ring B005 retaining the shaft seal and support washer 2 Remove the support washer M004 3 Carefully pry out the shaft seal M003 To avoid damaging the shaft during removal install a large sheet metal screw into the chuck of a slide hammer Drive the screw into the seal surface and use the slide hammer to pull the seal 4 Discard the seal Replacing the shaft seal
17. eceessuecessuecsnseeessseessnueeccaseesenseessaneeesaas Remov the SHAPE SCell zsciisssscsccesccceaeleceazsacacscacasss ccasussosiysescubendasaconssasZesaignvssccceassdtesvvarevcechaves cosyassodcigasbsiccevasdbsascgesdcanguaiscrs Inspect the components Install the new shaft seal Speed sensor replaceMentt sssscssssssccsscccsseccsnsseccsseessnseeccssecsssseeessuecesssecsessecssueesssueccsneeeesuesssuceccsnsesesusecssaseessueessueessnseeesass REMOVE The SHEE SEMSOM csesscsscasessanccsessssossasvseccessousconsoeadescensencssenneaaossciussdbusddendbenscbsbsccavoendscensiesd casvienseesevsscosasenveceussonscieaves Install the new speed sensor Speed sensor adjustment Adjustment and troubleshooting s sssssccssssscssssccssecssssssssssecsssuseccsnecssssecessueecssseessnueeccsneesessceesasecessueesssueeecaseessaeeeeesseessnees 17 Loop MUS IMG Valvan erisir eea a E A VAENE EEA Ee A AERE E ATA ER 17 Remove the loop flushing VAaIVE sssssssseccssessccsecssseecsssecessseecsnsesesssecssnsccecssecssneceesssecsssseessusesesssecsssutessusecssneeessaseeseaseesse 17 lnsp ct the COMPOMEINS ssdcvvvsesisissvescsonsviesenscecnsnanessssonzssnnnsasessvecaerosanisacesdbossnaabanasennSdesuassogsosasnnssnsssaseeecehonveaesiscessonanvedaced cs Install the loop flushing valve Anti Cavitation Valve Remove the anti cavitation valve Inspect the components Install the anti cavitation ValVE ccccsssssssssssseessessesssesssesssessesssesssssssssses
18. ed Circuit Axial Piston Pumps and Motors e Displays e Electrohydraulic Power Steering e Electrohydraulics e Hydraulic Power Steering e Integrated Systems e Joysticks and Control Handles e Microcontrollers and Software e Open Circuit Axial Piston Pumps e Orbital Motors e PLUS 1 GUIDE e Proportional Valves e Sensors e Steering e Transit Mixer Drives Comatrol www comatrol com Schwarzmiiller Inverter www schwarzmueller inverter com Turolla www turollaocg com Valmova www valmova com Hydro Gear www hydro gear com Daikin Sauer Danfoss www daikin sauer danfoss com Danfoss Power Solutions US Company 2800 East 13th Street Ames IA 50010 USA Phone 1 515 239 6000 D 24539 Neum nster Germany Phone 49 4321 871 0 Danfoss Power Solutions is a global manufacturer and supplier of high quality hydraulic and electronic components We specialize in providing state of the art technology and solutions that excel in the harsh operating conditions of the mobile off highway market Building on our extensive applications expertise we work closely with our customers to ensure exceptional performance for a broad range of off highway vehicles We help OEMs around the world speed up system development reduce costs and bring vehicles to market faster Danfoss Your Strongest Partner in Mobile Hydraulics Go to www powersolutions danfoss com for further product information Wherever off highway vehicles
19. it L25 L30 L35 K38 K45 System pressure continuous bar psi 210 3045 175 2540 140 2030 210 3045 175 2540 maximum 415 6020 350 5075 300 4350 415 6020 350 5075 Speed limit continuous min rpm 3400 3500 3600 3600 3500 at max disp maximum 3950 4150 4300 4000 3900 Speed limit continuous 4400 4450 4500 4650 4500 tatmin disp maximum 5000 5150 5300 5200 5050 Case pressure continuous bar psi 2 29 maximum 6 87 Fluid specifications Ratings and data are based on operation with premium petroleum based hydraulic fluids containing oxidation rust and foam inhibitors 520L0629 Rev DA November 2014 Desf Service Manual K and L Frame Variable Motors SAE Mount Technical specifications Filtration efficiency suction filtration Parameter Unit Minimum Continuous Maximum Viscosity mm2 sec cSt 7 12 60 1600 SUS 47 70 278 7500 Temperature C F 40 40 82 180 104 220 Cleanliness ISO 4406 Class 18 13 or better B35 44 75 B1021 5 charge filtration Bi5 20 75 819210 520L0629 Rev DA November 2014 Service Manual K and L Frame Variable Motors SAE Mount Features Displacement limiter Output shafts Controls KV LV motors are available with a minimum angle stop This displacement limiter is not adjustable Displacement limiter Minimum angle stop P104 242E
20. ment control Control pressure applied through an external control valve shifts the motor to minimum displacement spring force returns the motor to maximum displacement in the absence of control input System circuit diagram HB High loop pressure Servo piston m ES ee Hi Displacement 6D Q control spool O wy D Pump control handle and feedback linkage Reservior Charge relief valve Input Z A shaft ZN ml i Pump Cylinder swashplate block assembly Check valves w high pressure relief valves and bypass plunger Charge pump Filter Case pressure HB Charge low loop pressure E Control pressure Inlet pressure Motor displacement N control valve a Displacement Motor limiter servo piston Output shaft sils 1 f Cylinder Motor block swashplate P101 335E assembly 6 520L0629 Rev DA November 2014 Service Manual K and L Frame Variable Motors SAE Mount Technical specifications Overview Features and options Specifications and operating parameters for KV LV motors are given here for reference
21. n hex wrench remove plug E042 3 Remove O rings E020B E042A and E010B 520L0629 Rev DA November 2014 Service Manual K and L Frame Variable Motors SAE Mount Minor repair 4 Using pliers remove centering springs E041 E020C and E010C 5 Remove spring retaining washers E020D and E010D 6 Remove shift spool E030 7 Remove orifice poppet E040 Loop flushing valve 11 16 in 37 Nm 27 Ibf ft 5020p 030 lt E020C E001 0208 X Dl E020 O 11 16 in B E040 2 37Nm X 27 Ibf ft _ E041 E042A lt E042 2 5 8 in 27N m 20 Ibf ft P106 512E Inspect the components Inspect new O rings and the sealing area for rust wear or contamination Also check springs and poppet for wear Install the loop flushing valve Install orifice poppet E040 Install shift spool E030 Install spring retaining washers onto springs E020D and E010D Carefully install centering springs E041 E020C and E010C Install new O rings E010B E020B and E042A Using a 1 4 in hex wrench torque plug E042 to X Nem X ft lbs Using a 11 16 in internal hex torque plugs E010 and E020 to X Nem X Ibfeft N Qu AWN 18 520L0629 Rev DA November 2014 Service Manual K and L Frame Variable Motors SAE Mount Minor repair Anti Cavitation Valve Remove the anti cavitation valve
22. ssessesssessscssesssessncesesssesssessecssesssesscsssessseesessseesseeseesses 520L0629 Rev DA November 2014 3 Service Manual K and L Frame Variable Motors SAE Mount Introduction Overview Safety precautions This manual includes information for the installation maintenance and minor repair of the K and L Frame SAE Mount Variable Motors The manual includes a description of the units and their individual components troubleshooting information and minor repair procedures Performing installation maintenance and minor repair of K and L Frame Variable Motors according to the procedures in this manual will not affect your warranty Performing minor repairs requires the unit to be removed from the vehicle machine Thoroughly clean the unit before beginning maintenance or repair activities Since dirt and contamination are the greatest enemies of any type of hydraulic equipment follow cleanliness requirements strictly This is especially important when changing the system filter and when removing hoses or plumbing A worldwide network of Danfoss Authorized Service Centers ASCs is available for major repairs Major repairs require the removal of the unit s endcap which voids the warranty unless done by an ASC Danfoss ASCs are trained by the factory and certified on a regular basis You can locate your nearest ASC using the distributor locator at www danfoss com Always consider safety precautions before beginning
23. th open and closed circuit applications KV LV motors have an SAE B two bolt mounting configuration The standard control is a direct acting single line hydraulic control The integral servo piston controls motor displacement The motors are spring biased to maximum displacement and hydraulically shifted to minimum displacement Minimum and maximum displacement can be set with fixed internal stops The large diameter servo piston allows smooth acceleration and deceleration with relatively large circuit orificing The motors are ideally configured for installations requiring compact packaging and optimized plumbing such as wheel ends One face of the motor contains all hydraulic porting Two standard porting configurations are available twin radial side or axial end O ring boss main ports 520L0629 Rev DA November 2014 5 Service Manual K and L Frame Variable Motors SAE Mount Introduction Cross section view Bias spring Minimum angle stop Cylinder block Endcap The System circuit Servo piston Swashplate Output My shaft Piston Sli Valve plate et ag Shaft seal Bearing P101109 The circuit below shows the KV LV motor in a simple closed loop hydrostatic propel application The motor is driven by a Series 42 medium power axial piston pump with manual displacement control The motor shown uses a single line hydraulic displace
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