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Service Manual

Steering unit

VSPP

www.danfoss.com

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Содержание VSPP

Страница 1: ...Service Manual Steering unit VSPP www danfoss com...

Страница 2: ...Revision history Table of revisions Date Changed Rev November 2019 First edition 0101 Service Manual VSPP Steering unit 2 Danfoss November 2019 AX319758618681en 000101...

Страница 3: ...move dust seal and shaft from housing 18 VSPP maintenance Cleaning 19 Inspection and replacement 19 VSPP assembly Assemble spool sleeve set 20 Assemble shaft seal and spool sleeve set to housing 23 As...

Страница 4: ...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...

Страница 5: ...VSPP Item Description Number per unit Tightening torque 1 Spool sleeve set 1 2 Housing 1 4 Threaded bushing Screw below surface of housing 1 5 Ball 6 0 mm 1 6 O ring 79 4 x 2 0 mm 1 7 Shaft seal 1 9 D...

Страница 6: ...with thrust pad for shock valve 2 63 Valve seat for shock valve with O ring 2 6 0 1 N m 59 0 8 9 lbf in 63 1 Valve seat for shock 2 63 2 O ring 6 x 1 5 mm 2 64 Adjusting screw for shock valve with O...

Страница 7: ...tools VSPP holding tool Holding tool dimensions drawing 90 1 46 0 5 120 2 2x 15 0 1 5 1 20 1 150 2 100 2 7x51 4 6 4 7x 15 0 5 0 1x45 P301 644 Material Appropriate metal or hard plastic This tool is n...

Страница 8: ...43 Material Free cutting steel This tool is not available from Danfoss Assembly tool for shaft sea O ring RotoGlyd type Assembly tool for shaft seal O ring Roto Glyd type Code number 11092408 Service...

Страница 9: ...ket spanner for external hexagon 6 13 and 22 mm Hex keys for internal hexagon 2 2 75 3 5 6 and 8 mm Screwdrivers 2 and 12 mm Incide circlip pliers Magnetic rod Hook of max 2mm wire Multigrip pliers Pl...

Страница 10: ...ing Unit follow these steps Place the unit on the holding tool on the gear set end VSPP Steering Unit mounted on holding tool Service Manual VSPP Steering unit VSPP disassembly 10 Danfoss November 201...

Страница 11: ...2x64 using a 5mm Hex key O rings 2x64 2 are fitted to the adjusting screws 2 Remove the springs with a thrust pad 2x62 using a 2mm flat head screwdriver 3 Remove the balls 2x61 using a magnet rod 4 S...

Страница 12: ...valve parts from housing follow these steps Replace the VSPP unit in the holding tool so that it s placed with the column surface on the fixture VSPP placed on column surface in the fixing tool Servi...

Страница 13: ...in 1 Screw off the plug 25 using a 22 mm socket spanner O ring 25 2 is fitted to the plug 2 Remove the spring 23 using a hook 3 Remove the spool 21 using and incide circlip pliers Orifices 21 2 and 2...

Страница 14: ...to the screw 7 Remove the spring 86 8 Remove the valve cone 85 Do not remove plug 75 This is a pure blinding plug O ring is not available for this plug in the seal kit Service Manual VSPP Steering uni...

Страница 15: ...crew off the six screws 31 using a 13mm socket spanner 2 Screw off the pin bolt screw 32 using a 13mm socket spanner 3 Remove the washers 35 4 Remove the end cover 36 by sliding sideward 5 Lift the ge...

Страница 16: ...VSPP housing from holding tool and let balls 5 2x81 and 173 fall out Hold in hand to remove balls from gear set end Service Manual VSPP Steering unit VSPP disassembly 16 Danfoss November 2019 AX319758...

Страница 17: ...ke sure that cross pin 12 cannot fall into ring channels in housing 2 when pressing out the spool sleeve set 3 Press out the spool sleeve set 1 from housing 2 Cross pin 12 ring 16 set of spinrgs 14 an...

Страница 18: ...ool of the sleeve 1 4 Press the set of neutral springs 14 out of the slot of the spool 5 Remove the dust seal 9 and the shaft seal 7 carefully with a 2mm screw driver The VSPP steering unit is now com...

Страница 19: ...replacement Replace all seals and washers Place new O rings from seal kit on plugs 24 1 25 1 64 1 87 1 99 1 and on seats 63 1 Check all parts carefully and make any replacements as necessary Service M...

Страница 20: ...iguration of spring set There can be 2 4 or 6 curved springs Spring configuration Some spool and sleeve sets for VSPP must be positioned correctly relative to each other Small marks are present of bot...

Страница 21: ...into the slot 3 Line up the spring set 14 Aligning the spring set 4 Guide the ring 16 down over the sleeve The ring sould be able to move freely of the springs 5 Fit the cross pin 12 into the spool s...

Страница 22: ...ttern Assembly pattern for standard bearing 1 Outer bearing race 2 Needle bearing 3 Inner bearing race 4 Spool 5 Sleeve The inside chamfer on the inner bearing race must face the chest of the inner sp...

Страница 23: ...uide the outer part of the assembly tool for shaft seal into the bore of housing 2 for the spool sleeve set 1 VSPP with guide for shaft seal 2 Grease the new shaft seal Roto Glyd 7 with hydraulic oil...

Страница 24: ...seal 5 into position in the housing 5 Draw the inner and outer parts of the assembly tool out of the steering unit bore leaving the guide from the inner part of the bore 6 Guide the spool and sleeve i...

Страница 25: ...7 Install the shaft seal The spool set will push out the assembly tool guide Service Manual VSPP Steering unit VSPP assembly Danfoss November 2019 AX319758618681en 000101 25...

Страница 26: ...Description Wrench size Torque 4 Threaded bushing 12 mm screw driver Screw below surface of housing 172 Pin bolt screw for LS check 2 mm Hex key 1 0 1 N m 8 9 0 9 lbf in 31 Screw 13 mm socket spanner...

Страница 27: ...n the cardan shaft 13 Place the gear wheel side with all the deeper splines facing downdwards Only this side will fit on the cardan shaft due to all gear sets used in VSPP hasve timing securing spline...

Страница 28: ...to the spool 21 1 a Before assembling orifices 21 2 and 21 3 to the spool fix the spool in a vice with aluminum jaws b Screw in PP orifice 21 2 using a 2mm Hex key Tightening torque 1 0 1 N m 8 9 0 9...

Страница 29: ...ring 87 2 is fitted to the screw Tightening torque 20 5 N m 177 44 lbf in Assemble shock and relief valves and dust seal to housing To assemble shock and relief valve parts to the column end of the ho...

Страница 30: ...slanted bore Relief valve shall be adjusted in hydraulic test see Testing of VSPP on page 32 4 Screw in the valve seat 63 using a 2 75mm Hex key O rings 2x63 2 are fitted to the valve seats Tightening...

Страница 31: ...plugs to the connections ports to keep the ports clean during storage and transportation VSPP with plastic plugs in ports Service Manual VSPP Steering unit VSPP assembly Danfoss November 2019 AX31975...

Страница 32: ...sting Use universal hydraulic work bench with pump capacity 3 l min and 270 bar for shock valve testing 25 l min and up to 190 bar pressure for relief valve setting and steering test The hydraulic oil...

Страница 33: ...bar Max allowed T pressure is 30 bar Pump supply circuit must be adjusted not to exceed 190 bar P T at steering test Start up test During the testing no disturbing vibrations noise or other irregular...

Страница 34: ...utral position when the pressure drop P T is no higher than 18 bar Check for external leakage 1 After testing of the former items the port connections are removed 2 P EF L and R ports are to be plugge...

Страница 35: ...ended tightening torque N m lbf in With cutting edge With copper washer With alum washer O ring G 1 2 100 885 55 486 80 708 3 4 16 UNF 60 531 M18 1 5 80 708 55 486 70 619 50 442 Service Manual VSPP St...

Страница 36: ...ark Phone 45 7488 2222 Danfoss Power Solutions US Company 2800 East 13th Street Ames IA 50010 USA Phone 1 515 239 6000 Danfoss Power Solutions Trading Shanghai Co Ltd Building 22 No 1000 Jin Hai Rd Ji...

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