OSPB/OSPC Type ON/CN Steering Units Service Manual
Contents
1. Dismantling Dismantling the shock valve for OSPC Prise off the plastic protection plugs 30 from the two shock valves F301 683 Remove pressure adjustment screws 29 using a5 mm hexagon socket spanner F301 684 Remove the two shock valve springs 27 F301 685 10 L1004933 Rev BA Mar 2014 Denpi Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Dismantling Remove the shock valve balls 26 F301 686 Removed the shock valve seats with 2 75 mm Allan key 25 F301 687 E itt E Mi F301 688 The shock valves are now dismantled L1004933 Rev BA Mar 2014 11 Denpi Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Dismantling Dismantling Place the steering unit in the holding tool Remove the 6 screws 17 and the special pin bolt 16 from the end cover plate F301 668 Remove the end cover 14 sideways F301 669 Lift the gearwheel set 13 off the unit Remove the two O rings 11 F301 670 12 L1004933 Rev BA Mar 2014 Denpi Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Dismantling Remove the cardan shaft 10 F301 671 Remove distributor plate 12 F301 672 Screw out the threaded bush 4 retaining the check valve ball 3 L1004933 Rev BA Mar 2014 13 Service Manual Hydrostatic Steering Uni2. We help OEMs around the world speed up system development reduce costs and bring vehicles to e Displays market faster Electrohydraulic Power Danfoss Your Strongest Partner in Mobile Hydraulics Steering Go to www powersolutions danfoss com for further product information e Electrohydraulics e Hydraulic Power Steering Wherever off highway vehicles are at work so is Danfoss e Integrated Systems 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 e Joysticks and Control Handles Microcontrollers and Please contact the Danfoss Power Solution representative nearest you Software Open Circuit Axial Piston Pumps Orbital Motors e PLUS 1 GUIDE Proportional Valves Sensors Steering Transit Mixer Drives Comatrol www comatrol com Local address 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 Danfoss Power Solutions US Company Power Solutions GmbH amp Co OHG 2800 East 13th Street Krokamp 35 Ames IA 50010 USA D 24539 Neum nster Germany Phone 1 515 239 6000 Phone 49 4321 871 0 comprehensive global service for all of our components Power Solutions ApS Nordborgvej 81 DK 6430 No
3. F301 679 L1004933 Rev BA Mar 2014 15 Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Dismantling Carefully press the spool out of the sleeve F301 680 Press the neutral position springs 9 out of the slot in the spool F301 681 Remove dust seal 1 and Roto Glyd Seal 5 carefully with a screw driver or similar tool a F301 682 16 L1004933 Rev BA Mar 2014 Devt Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Dismantling Cleaning Lubrication Inspection and Replacement The steering unit OSPB and OSPC is now completely dismantled F301 693 Clean all parts carefully in Shellsol K or similar cleaner fluid Before assembly lubricate all parts with hydraulic oil Replace all seals and washers Check all parts carefully and make any replacements as is necessary L1004933 Rev BA Mar 2014 17 Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Assembling Assembling of spool and sleeve set Place the two flat neutral position springs in the slot Place the curved springs between the flat ones and press them into place F301 694 Configuration of spring set 9 150 386 10 Line up the spring set 9 F301 695 18 L1004933 Rev BA Mar 2014 Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Assembling Guide the
4. spool into the sleeve 2 and making sure the centering springs 9 are placed into the slot Caution OSPB CN and OSPC CN Assemble the spool sleeve 2 and make sure the marks on spool and sleeve 2 aligne with each other Line up the springs 9 and centre them F301 696 F301 697 F301 699 L1004933 Rev BA Mar 2014 Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Assembling Guide the ring 7 down over the sleeve The ring should be able to move free of springs F301 700 Fit the cross pin 8 into the spool sleeve F301 701 Fit bearing races and needle bearing 6 as shown on the drawing below F301 702 Caution i e Assembly pattern for standard bearing 2g 1 Outer bearing race 2 2 Needlebearing ee E 3 Inner bearing race 5 l 4 Spool N 5 Sleeve 150 383 10 20 L1004933 Rev BA Mar 2014 Denpi Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Assembling The inside chamfer on the inner bearing race must face the inner spool Installation instruction for Roto Glyd Seal Place the steering unit housing with the port face down on the work bench Guide the outer part of the assembly tool into the bore for the spool sleeve set 2 F301 703 Grease Roto Glyd 5 with hydraulic oil and place them on the tool Ensure that the Roto Glyd seal is placed
5. with port face F301 719 26 L1004933 Rev BA Mar 2014 Denpi Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Assembling Fit the special screw 16 with washer 15 and place it in the hole shown F301 720 Fit the six screws 17 with new washers 15 and insert them Cross tighten all the screws 17 and the rolled pin 16 with a torque of 30 6 N m 265 5 53 Ibf in The OSPB C can now be function tested manually Place the dust seal ring in the housing F301 729 L1004933 Rev BA Mar 2014 27 Dope Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Assembling Fit the dust seal ring in the housing using special tool SJ 150 9000 22 see page 5 and a plastic hammer F301 730 Screw the plastic plugs into the connection ports F301 731 Assembly of the pressure relief valve for OSPC Install the piston 19 to housing s F301 722 28 L1004933 Rev BA Mar 2014 Denpi Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Assembling Install the spring 20 on top of the piston 19 F301 723 Screw in the adjustment screw 21 with an 8 mm hexagon socket spanner Make the pressure setting on a test panel or the vehicle as required Reinsert plastic protection plug 23 to the adjustment screw 21 F301 724 Assembly of the shock valves fo
6. MAKING MODERN LIVING POSSIBLE Steering Unit Type OSPB and OSPC Type ON and CN 5 powersolutions danfoss com Denpi Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Revision History Table of Revisions Date Changed Rev Mar 2014 Converted to Danfoss layout DITA CMS BA May 2011 Drawing AC Sep 2010 New back cover AB May 2010 First edition AA L1004933 Rev BA Mar 2014 Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Contents Exploded view Dismantling Assembling Exploded view OSPB Exploded view OSPC WOO S innana A aE AN EE A O ANS 7 Dismantling the pressure relief valve for OSPC ssssscsssssssssssccsssscssssscessseersucsessusecssnesssueeessnscessneceesuseessnseeesnsecesueeessneeeesaes 8 Dismantling the shock valve for OSPC cscsssssscsssscssssscssssescsnsecssnsesesusecssseesesusecssusecssuseccsuseessueeeesuseessaseeesuseessueeessaseseeneesiseees 10 DisMaNtiN Gf sas azasnsysnacaiyulensecesaasvesnsyercavecasausschqadeccass dvtuacennasagboaysazbdeuqndeacesavstacsasdysndeeaniasssiyydevdecisscannssvovssa stad aqndasectossstbsanncosenebe 12 Cleaning 17 Lubrication Inspection ANd REplaceME Nt csssccsssssccsssccssseccsnesccssecsssueeccsneesssseesssueccssueeccsuecessseesssueeccsuecesseceesaseccesueeesaeeesenseesssueeccaseessaeeeesae 17 Assembling of spool and sleeve Set ssssssssscsssscc
7. al Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Exploded view Exploded view OSPC P301 336 Exploded view OSPC callouts Callout Description Callout Description 1 Dust Seal Ring 20 Relief Valve Spring 2 Housing Spool Sleeve 21 O ring seal 1 pc 014 3 x 2 4mm 3 Check Valve Ball 8 5 mm 22 Relief Valve Adjustment Screw 4 Threaded Bushing 23 Plastic Plug 5 Roto glyd Shaft Seal 24 Shock Valve Seat 2 pcs 6 Thrust Bearing Assembly 3 pcs 25 O ring 2 pcs 6 x 1 5mm 7 Retainer Ring 26 Shock Valve Ball 2 pcs 3 16 8 Cross Pin 6x 41 mm 27 Shock Valve Spring 2 pcs 9 Neutral Spring Kit 4 6 or 8 pcs 28 Shock Valve Adjustment Screw 2 pcs 10 Cardan Shaft 29 O ring 2 pcs 9 x 1 5mm 11 O ring Seal 3 pcs 079 4 x 2 mm 30 Plastic Plug 12 Distributor plate 31 Suction Valve Ball 2 pcs 3 16 13 Gear Wheel Set 32 Suction Valve Spring 2 pcs L1004933 Rev BA Mar 2014 5 Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Exploded view Exploded view OSPC callouts continued Callout Description Callout Description 14 End Cover Plate 33 Suction Valve Retainer Pin 15 Sealing Washer 34 Gear Wheel Set with Seal Star 7 pcs 8 2 x 2 x 1 0mm 16 Pin Bolt Screw 35 Seal Star O ring 1 pc 17 Screw 6 pcs 36 Seal Star PTFE Ring 1 pc 18 Model Code Label 37 Check Va
8. lve in the P port 19 Relief Valve Piston 6 L1004933 Rev BA Mar 2014 Denpi Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Dismantling Tools Holding tool Code number SJ 150 9000 2 F300 937 Assembly tool for O ring and kin ring Roto Glyd Code number SJ 150 9000 11 Code number SJ SJ 150N4014 1 F301 732 Assembly tool for dust seal Code number SJ 150 9000 22 F300 946 L1004933 Rev BA Mar 2014 7 Dope Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Dismantling Torque wrench 0 70 Nm 13 mm socket spanner 2 75 5 6 and 8 mm Allan key 12 mm screwdriver 9 9 8 l 2 mm 0 08 in screwdriver SSS 13 mm ring spanner Q SS Plastic hammer Tweezers EE The tools are not available from Danfoss yeaa F300 939 Dismantling the pressure relief valve for OSPC First remove plastic plug 23 F301 726 Screw out the adjustment screw 22 using an 8 mm hexagon socket spanner 8 L1004933 Rev BA Mar 2014 Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Dismantling Remove the relief valve spring 20 F301 690 Remove the piston as shown 19 R F301 691 The pressure relief valve is now dismantled F301 692 L1004933 Rev BA Mar 2014 9 Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN
9. olt holes indicated by the arrows F301 712 Place the pins 33 in the same two bolt holes F301 713 In some cases a spring 32 has to be fitted on the pin before it is placed in the housing F300 997 24 L1004933 Rev BA Mar 2014 Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Assembling Grease the o ring 11 with mineral oil approx viscosity 500 mm SUS at 20 C 68 F Insert the o ring in the grove on the housing F301 714 Place the distributor plate 12 so that the channel holes match the holes in the housing F301 715 Guide the cardan shaft 10 down into the bore so that the slot is parallel with the connection flange ports and lines up with the cross pin 8 F301 716 L1004933 Rev BA Mar 2014 25 Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Assembling Grease the two o rings with mineral oil approx viscosity 500 mm SUS at 20 C F and place them in the two groves in the gear rim Fit the gearwheel and rim 13 on the cardan shaft 10 F301 717 Caution Fit the gearwheel rotor and cardan shaft so that a tooth base in the rotor is positioned in relation to the shaft slot as shown Turn the gear rim so that the seven through holes match the holes in the housing F301 718 Place the end cover 14 in position Ensure that the bar codes and writing are parallel
10. on the insertion tool as per the photograph F300 985 Hold the outer part of the assembly tool in the bottom of the steering unit housing and guide the inner part of the tool right to the bottom F301 986 L1004933 Rev BA Mar 2014 21 Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Assembling Press and turn the Roro Glyd seal 5 into position in the housing F301 987 Draw the inner and outer parts of the assembly tool out of the steering unit bore leaving the guide from the inner part in the bore F301 988 With a light turning movement guide the spool and sleeve into the bore Fit the spool set holding the cross pin 8 horizontal F301 708 22 L1004933 Rev BA Mar 2014 Denpi Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Assembling The spool set will push out the assembly tool guide The Roto Glyd Seals 5 are now installed F301 709 Assembling Turn the stearing unit until the bore is vertical again Put the check valve ball 3 into the hole indicated by the arrow F301 710 Screw the threaded bush 4 lightly into the check valve bore The top of the bush must lie just below the surface of the housing F301711 L1004933 Rev BA Mar 2014 23 Dope Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Assembling Place a ball 31 in the two b
11. r OSPC Screw the shock valve seats 24 with a 2 75 mm Allan key into the cavities indicated by the arrows Torque to 1 5 Nm F301 734 L1004933 Rev BA Mar 2014 29 Denpi Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Assembling Place one ball 26 in each of the shock valve cavities Se 301725 Place springs valve cones 27 over the two balls The copper coated spring applies to a setting range 90 190 bar 1305 2755 psi The black spring applies to a setting range 180 240 bar 2610 3480 psi F301 766 Screw in the two setting screws 28 using a5 mm Allan key Make the pressure setting on a panel description 30 L1004933 Rev BA Mar 2014 Devt Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Assembling Insert plastic plug 30 into the 5 mm internal hex F301 728 L1004933 Rev BA Mar 2014 31 Products we offer 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 Bent Axis Motors excel in the harsh operating conditions of the mobile off highway market Building on our extensive Closed Circuit Axial Piston Pumps and Motors applications expertise we work closely with our customers to ensure exceptional performance for a broad range of off highway vehicles
12. rdborg Denmark Phone 45 7488 2222 Danfoss Power Solutions Shanghai Co Ltd Building 22 No 1000 Jin Hai Rd Jin Qiao Pudong New District 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 subsequential 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 L1004933 Rev BA Mar 2014 www danfoss com Danfoss A S 2014
13. ssessssseccsssesssssesssnecessusesssssesssseesssusecssueeessseeessnecessseesssseessuseessaneccuseessaeeesees 18 Installation instruction for Roto Glyd Seal ssssssssscssssessseeccssecssssssecssecessseeesssecesssecssssececsseecssueeessecsssseeessuecessnecsssueecceneess 21 AssemBlin genssor anana r E ETAETA AONT ETRA ER TENE 23 Assembly of the pressure relief valve for OSPC ssssscssssssssssssssseccssessssusecsssecessueecssueessuscsssusecssncsesuseecsueeessueeceenseessneesssass 28 Assembly of the shock valves for OSPC sssscsssssecssseccsssscssseccssseesssseecsssecssssseesuseesssseesssneeesuseessaseeesascessussessasecssaseeesaneeesnseesse 29 L1004933 Rev BA Mar 2014 3 Denpi Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Exploded view Exploded view OSPB Exploded view OSPB callouts P301 267 Callout Description Callout Description 1 Dust Seal Ring 10 Cardan Shaft 2 Housing Spool Sleeve 11 O ring Seal 3 pcs 79 4 x 2 mm 3 Check Valve Ball 8 5 mm 12 Distributor plate 4 Threaded Bushing 13 Gear Wheel Set 5 Roto glyd Shaft Seal 14 End Cover Plate 6 Thrust Bearing Assembly 3 pcs 15 Sealing Washer 7 pcs 8 2 x 15 2 x 1 0 7 Retainer Ring 16 Pin Bolt Screw 8 Cross Pin 6 x 41 mm 17 Screw 6 pcs 9 Neutral Spring Kit 4 6 or 8 pcs 18 Model Code Label L1004933 Rev BA Mar 2014 Devt Service Manu
14. t Type OSPB and OSPC Type ON and CN Dismantling Remove O rings 11 OSPB Shake out the check valve ball 3 8 5 mm OSPC Shake out the check valve ball 3 and suction valve pins 33 and balls 31 On some pins in the OSPC there are two springs see page 4 pos 32 Place the housing with the ports facing down on the work bench Ensure that the cross pin 8 in the spool and sleeve set 2 is in the horizontal position The pin 8 can be observed through the open end of the spool Press the spool 2 inwards from the housing mounting face end and the sleeve 2 ring 7 and bearing assembly 6 will be pushed out of the housing together F300 955 14 L1004933 Rev BA Mar 2014 Service Manual Hydrostatic Steering Unit Type OSPB and OSPC Type ON and CN Dismantling Take the ring 7 bearing races and needle bearing 6 from the spool and sleeve set 2 The outer bearing 6 race can sometimes stick in the housing therefore check that it has come out F301 677 Press out the cross pin 8 Use the special screw from the end cover 16 Note next point paragraph F301 678 OSPB CN and OSPC CN A small mark has been made on both spool and sleeve close to one of the slots for the neutral position springs 6 Caution If the mark is not visible remember to leave a mark of your own on sleeve and spool before the neutral position springs are dismantled
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