{"product_id":"yale-c879-gc135vx-gdc135vx-glc135vx-gc155vx-gdc155vx-glc155vx-forklift-pdf-repair-service-manual","title":"Yale C879 GC135VX, GDC135VX, GLC135VX, GC155VX, GDC155VX, GLC155VX Forklift Pdf Repair Service Manual","description":"\u003ch2\u003eYale C879 GC135VX–GC155VX Heavy-Duty Forklift PDF Repair Service Manual\u003c\/h2\u003e\n\u003cp\u003eWhen a forklift rated for 13,500 or 15,500 lb is down for repairs, getting the correct technical information matters just as much as having the right tools. The \u003cstrong\u003eYale C879 GC135VX, GDC135VX, GLC135VX, GC155VX, GDC155VX and GLC155VX repair service manual\u003c\/strong\u003e brings together detailed workshop references for the mechanical, hydraulic, electrical and powertrain systems used across this heavy-capacity forklift family.\u003c\/p\u003e\n\u003cp\u003eThis documentation is intended for technicians and fleet maintenance teams working on Yale's C879 trucks. Rather than focusing only on daily inspections, it includes component-level repair information, diagnostic troubleshooting, system diagrams, calibration procedures and technical specifications. That makes it a useful reference when a job moves from identifying a symptom to investigating the relevant assembly.\u003c\/p\u003e\n\u003ch3\u003eBuilt Around the Systems That Move Heavy Loads\u003c\/h3\u003e\n\u003cp\u003eWith a high-capacity forklift, drive performance, braking, steering and hydraulic lifting all have to work together. The manual covers several areas that technicians may need to investigate during planned maintenance or a repair.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePowertrain diagnosis:\u003c\/strong\u003e Consult the two-speed and three-speed powershift transmission sections when investigating transmission performance or planning internal component service.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWet-brake drive axle:\u003c\/strong\u003e Find drive-axle and differential assembly repair information relevant to the documented wet-brake configuration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydraulic delivery and control:\u003c\/strong\u003e Reference the hydraulic gear pump, main control valve and hydraulic cleanliness procedures when examining hydraulic-system performance or preparing component work.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-duty mast servicing:\u003c\/strong\u003e Use the mast repair information for applicable two-stage and three-stage mast assemblies, alongside the relevant cylinder procedures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrical troubleshooting:\u003c\/strong\u003e Refer to wiring diagrams, schematics, wire-harness repair information and diagnostic procedures to trace electrical faults.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine and fuel systems:\u003c\/strong\u003e Consult the documented GM engine, ignition, LPG and gasoline fuel-system material for the configuration fitted to the truck.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteering and braking:\u003c\/strong\u003e Locate the steering-axle and Dana brake-system information when servicing these essential vehicle systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eModels and Capacity Classes\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYale model\u003c\/th\u003e\n\u003cth\u003eSeries\u003c\/th\u003e\n\u003cth\u003eNominal capacity class\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eGC135VX\u003c\/td\u003e\n\u003ctd\u003eC879\u003c\/td\u003e\n\u003ctd\u003e13,500 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGDC135VX\u003c\/td\u003e\n\u003ctd\u003eC879\u003c\/td\u003e\n\u003ctd\u003e13,500 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGLC135VX\u003c\/td\u003e\n\u003ctd\u003eC879\u003c\/td\u003e\n\u003ctd\u003e13,500 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGC155VX\u003c\/td\u003e\n\u003ctd\u003eC879\u003c\/td\u003e\n\u003ctd\u003e15,500 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGDC155VX\u003c\/td\u003e\n\u003ctd\u003eC879\u003c\/td\u003e\n\u003ctd\u003e15,500 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGLC155VX\u003c\/td\u003e\n\u003ctd\u003eC879\u003c\/td\u003e\n\u003ctd\u003e15,500 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThese figures identify the nominal capacity classes associated with the model designations. Actual lifting capacity depends on the truck's configuration, load centre, mast, attachments and capacity plate. Confirm the full model and serial identification before selecting a repair procedure.\u003c\/p\u003e\n\u003ch3\u003eTechnical Coverage for Workshop Repairs\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSystem or document section\u003c\/th\u003e\n\u003cth\u003eRelevant workshop tasks\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eGeneral truck and frame\u003c\/td\u003e\n\u003ctd\u003eStructural and general truck service references\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGM engine and ignition systems\u003c\/td\u003e\n\u003ctd\u003eEngine-related service and ignition troubleshooting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLPG and gasoline fuel systems\u003c\/td\u003e\n\u003ctd\u003eFuel-system diagnosis and component service\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling system\u003c\/td\u003e\n\u003ctd\u003eCooling-system inspection and repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTwo-speed and three-speed powershift transmission\u003c\/td\u003e\n\u003ctd\u003eTransmission diagnosis and component repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrive axle and differential\u003c\/td\u003e\n\u003ctd\u003eDrivetrain and wet-brake axle assembly service\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSteering axle\u003c\/td\u003e\n\u003ctd\u003eSteering-component maintenance and repair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDana brake system\u003c\/td\u003e\n\u003ctd\u003eBrake-system inspection and service\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHydraulic gear pump and main control valve\u003c\/td\u003e\n\u003ctd\u003eHydraulic power and control-system repairs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMast and cylinder repairs\u003c\/td\u003e\n\u003ctd\u003eLift-system component service for covered configurations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrical system and wiring harness\u003c\/td\u003e\n\u003ctd\u003eCircuit tracing, wiring repair and electrical diagnosis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCalibration and user interfaces\u003c\/td\u003e\n\u003ctd\u003eDocumented service procedures and diagnostic-interface references\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeriodic maintenance and specifications\u003c\/td\u003e\n\u003ctd\u003eScheduled service planning and technical reference\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eElectronic Diagnosis and Calibration\u003c\/h3\u003e\n\u003cp\u003eThe C879 documentation extends beyond mechanical assemblies. Its contents include a high-voltage-switch ignition system, diagnostic troubleshooting, calibration procedures, diagrams and schematics, plus separate supervisor and service-technician user-interface sections.\u003c\/p\u003e\n\u003cp\u003eThese references can be valuable when a repair involves electronic controls or a fault that cannot be resolved through visual inspection alone. The manual also lists wire-harness repair information, allowing technicians to consult the electrical documentation when tracing a circuit or investigating a connection issue. Use the procedure that corresponds to the installed system rather than assuming that every C879 truck has the same engine or electrical configuration.\u003c\/p\u003e\n\u003ch3\u003ePDF Manual Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer\u003c\/th\u003e\n\u003ctd\u003eYale\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSeries designation\u003c\/th\u003e\n\u003ctd\u003eC879\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEquipment type\u003c\/th\u003e\n\u003ctd\u003eHeavy-capacity forklift truck\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eModel coverage\u003c\/th\u003e\n\u003ctd\u003eGC135VX, GDC135VX, GLC135VX, GC155VX, GDC155VX and GLC155VX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDocument type\u003c\/th\u003e\n\u003ctd\u003eRepair and service manual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFormat\u003c\/th\u003e\n\u003ctd\u003ePDF digital document\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLanguage\u003c\/th\u003e\n\u003ctd\u003eEnglish\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTechnical material\u003c\/th\u003e\n\u003ctd\u003eRepair procedures, troubleshooting, diagrams, calibration and specifications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eKeep Service Information Accessible\u003c\/h3\u003e\n\u003cp\u003eA digital workshop manual lets you consult the relevant section without carrying a large printed reference book between the office and service area. On a compatible device, you can search the document where text search is supported, enlarge diagrams on screen and print selected pages for a particular job.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReview system information while preparing a repair or maintenance task.\u003c\/li\u003e\n\u003cli\u003eKeep electrical diagrams and component references available on a compatible laptop or tablet.\u003c\/li\u003e\n\u003cli\u003ePrint selected material for use at a workshop bench.\u003c\/li\u003e\n\u003cli\u003eReturn to the PDF for future service work on a covered C879 model.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis is a \u003cstrong\u003ePDF digital manual\u003c\/strong\u003e, not a physical book shipped by post. Access and download the file according to the instructions provided with your order.\u003c\/p\u003e\n\u003ch3\u003eChoose the Yale C879 Repair Service Manual\u003c\/h3\u003e\n\u003cp\u003eIf you maintain a Yale GC135VX, GDC135VX, GLC135VX, GC155VX, GDC155VX or GLC155VX, this manual offers broad technical coverage for the systems that matter in heavy-capacity forklift servicing. Use it as a reference for powertrain repairs, hydraulic diagnosis, electrical troubleshooting, mast work and planned maintenance. Check your truck's series and configuration before ordering to make sure the documentation matches the equipment in your workshop.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eWhat is the difference between the 135VX and 155VX models?\u003c\/h4\u003e\n\u003cp\u003eThe model designations correspond to nominal 13,500 lb and 15,500 lb capacity classes, respectively. The actual allowable load must be checked on the individual truck's capacity plate.\u003c\/p\u003e\n\u003ch4\u003eDoes the C879 manual include more than routine servicing?\u003c\/h4\u003e\n\u003cp\u003eYes. The listed contents include diagnostic troubleshooting, transmission and drive-axle repair, hydraulic components, mast and cylinder procedures, electrical diagrams and calibration information.\u003c\/p\u003e\n\u003ch4\u003eAre both two-speed and three-speed transmissions covered?\u003c\/h4\u003e\n\u003cp\u003eThe documented contents list separate two-speed and three-speed powershift transmission repair sections. Confirm which transmission is installed on your truck before using a procedure.\u003c\/p\u003e\n\u003ch4\u003eWhat fuel-system information is included?\u003c\/h4\u003e\n\u003cp\u003eThe contents list LPG fuel-system material and gasoline fuel-system information, alongside GM engine and ignition-system documentation. The relevant section depends on the truck's configuration.\u003c\/p\u003e\n\u003ch4\u003eCan I use the manual for wet-brake drive-axle work?\u003c\/h4\u003e\n\u003cp\u003eYes. Drive-axle and differential assembly repair and Dana brake-system information are included in the listed coverage.\u003c\/p\u003e\n\u003ch4\u003eHow do I confirm the correct C879 manual for my truck?\u003c\/h4\u003e\n\u003cp\u003eCompare the model and serial identification on the forklift with the six model designations listed in this product. 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