{"product_id":"liebherr-r954-r954b-r954c-r964-r964b-r974b-litronic-excavator-service-manual","title":"Liebherr R954, R954B, R954C, R964, R964B, R974B Litronic Excavator Service Manual","description":"Format : PDF\u003cbr\u003eSUPPLIED AS DOWNLOADABLE LINK\u003cbr\u003e\u003cbr\u003eR954, R954-HD, R954-V Litronic from serial 101 (Type 406, 494, 629, 630)\u003cbr\u003eR964, R964-HD Litronic from serial 101 (Type 407, 610)\u003cbr\u003eR974, R974B Litronic from serial 1001 (Type 408)\u003cbr\u003eLanguage: English\u003cbr\u003ePublication: 8503312\u003cbr\u003eFormat: PDF\u003cbr\u003eJuly 2005\u003cbr\u003eLiebherr R954, R954B, R954C, R964, R964B, R974B Litronic Wheel Excavator Service Manual – 1682 Pages\u003cbr\u003e\u003cbr\u003eDescription\u003cbr\u003eLiebherr R954, R954B, R954C, R964, R964B, R974B Litronic Wheel Excavator Manual\u003cbr\u003eExcavator\u003cbr\u003eModel Applicable from :\u003cbr\u003eR954, R954-HD, R954-V Litronic from serial 101 (Type 406, 494, 629, 630)\u003cbr\u003eR964, R964-HD Litronic from serial 101 (Type 407, 610)\u003cbr\u003eR974, R974B Litronic from serial 1001 (Type 408)\u003cbr\u003eLanguage: English\u003cbr\u003ePublication: 8503312\u003cbr\u003eFormat: PDF\u003cbr\u003eJuly 2005\u003cbr\u003eLiebherr R954, R954B, R954C, R964, R964B, R974B Litronic Wheel Excavator Service Manual – 1682 Pages\u003cbr\u003eTable of Content of the Service Manual:\u003cbr\u003e1 General information\u003cbr\u003e2 Tools\u003cbr\u003e3 Technical data \/ Maintenance guidelines\u003cbr\u003e4 Engine\u003cbr\u003e5 Coupling \/ Splitterbox\u003cbr\u003e6 Hydraulic system\u003cbr\u003e7 Hydraulic components\u003cbr\u003e8 Electrical system\u003cbr\u003e9 Swing gear\u003cbr\u003e10 Swing ring\u003cbr\u003e11 Travel gear \/ Two Speed Gear Box\u003cbr\u003e12 Track components \/ Axles\u003cbr\u003e13 Pressure Air System\u003cbr\u003e14 Central Lubrication\u003cbr\u003e16 Special Attachments \/ Additional Hydraulic Installations\u003cbr\u003e17 Cab Heater \/ Air Conditioning System\u003cbr\u003e18 Undercarriage \/ Uppercarriage Attachments\u003cbr\u003eThis manual has been prepared to provide you with technical information on the design and construction of the various components which made up the LIEBHERR excavator.\u003cbr\u003eManual Extract – Working position of spool valve\u003cbr\u003eIf a spool valve is moved from its neutral position, the connection from pump to user is open and restricts at the same time the flow to the tank.\u003cbr\u003eThe pump pressure rises until it reaches the pressure on the user connection. Oil starts to flow to the user. When the spool valve moves further, the connection from pump to tank closes off and opens the connection for the returning oil from the user to the tank.\u003cbr\u003eThe total oil flow from the pump is now available for the user.\u003cbr\u003eThe movement of the spool valve depends only on the available control pressure.\u003cbr\u003eThis control pressure can be changed continuously depending on the movement of the appropriate joystick (see description and function of the servo control, sub group 7.41).\u003cbr\u003eDue to a negative spool overlap, together with metering notches, the oil flow to the users and thus all working and travel movements, can be controlled by pistons in the control blocks The piston stroke is 15 mm per side on the NS 32, about 30% overlap and about 60% fine control. The remaining stroke is used to regain the nominal diameter.\u003cbr\u003eSprings, which are installed on the upper end of the spool, return the spools to neutral position if control pressure is not available.\u003cbr\u003eInternal leakages on a user connection under pres­sure are influenced by the overlap and the play between housing and piston. Maximum permissible leak oil, see \"Control Valves -Technical Data\".","brand":"Uploader","offers":[{"title":"Default Title","offer_id":53602167783755,"sku":null,"price":61.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0978\/2519\/4315\/files\/1-50_9205d0a1-77ce-4597-93b6-b1e94ae6c8c5.png?v=1760448375","url":"https:\/\/manualbull.com\/products\/liebherr-r954-r954b-r954c-r964-r964b-r974b-litronic-excavator-service-manual","provider":"ManualBull","version":"1.0","type":"link"}