Yale D879 (GCGLCGDC135VX, GCGLCGDC155VX) Forklift Pdf Repair Service Manual

Yale D879 135VX and 155VX Forklift PDF Service Manual

When you're maintaining a high-capacity forklift, a small fault in the drive system, braking components or hydraulics can interrupt demanding material-handling work. The Yale D879 GC/GLC/GDC135VX and GC/GLC/GDC155VX Repair Service Manual gives technicians a technical reference for diagnosing faults and servicing the systems fitted to these Yale industrial trucks.

Whether your machine uses a gasoline, LPG or diesel configuration, selecting the right model-specific procedures matters. This PDF manual brings together service information for the listed 135VX and 155VX model families, from electrical troubleshooting and power transmission to hydraulic controls and mast repairs.

Yale D879 Models Covered

• Yale GC135VX forklift
• Yale GLC135VX forklift
• Yale GDC135VX forklift
• Yale GC155VX forklift
• Yale GLC155VX forklift
• Yale GDC155VX forklift

Machine Information

These figures describe the nominal capacity classes. The rated capacity of an individual truck depends on its identification plate, load centre, mast, attachments and configuration.

Service Manual Contents

This manual is useful when a repair requires more than a basic component check. Its listed technical sections cover key systems that affect starting, driving, lifting and stopping.

• Engine and fuel systems: service information for covered GM gasoline/LPG and diesel engine configurations, including applicable fuel-system procedures.
• Diagnostic troubleshooting: diagnostic guidance and service-interface information for investigating operating faults.
• Electrical system: wiring diagrams, wire-harness repair, electronic controls and calibration procedures.
• Transmission and drive axle: two-speed and three-speed powershift transmission sections, plus drive axle and differential repair information.
• Hydraulic components: hydraulic gear pump and main control valve service information for investigating lifting and hydraulic-control problems.
• Steering and brakes: steering axle and Dana brake-system coverage.
• Mast and lift cylinders: repair information for specified two-stage and three-stage mast assemblies and applicable cylinder configurations.
• Cooling system: procedures and technical references for cooling-system service.
• Frame and maintenance: frame repair, periodic maintenance, capacities, specifications and metric/SAE fastener information.

Find the Right Information for the Repair

If the forklift has lost drive, is experiencing an electrical fault or isn't responding correctly to hydraulic controls, the relevant service section can help you identify what to inspect and which procedures apply. Transmission diagrams, wiring information and hydraulic component guidance are particularly useful when troubleshooting involves several connected systems.

Use the manual when preparing a repair, examining a mast assembly, servicing the drive axle, checking electrical connections or planning routine maintenance. Having technical information available before disassembly can also help you organize the job and identify the components involved.

Why Choose the PDF Version?

• Access the service reference digitally without waiting for a printed book.
• Search for component names or system terms when the PDF supports searchable text.
• Zoom into readable diagrams and illustrations on a compatible device.
• Keep the file available on a workshop computer or tablet.
• Print selected pages for bench-side reference when supported by your PDF reader and printer.

Manual Specifications

Get the Yale D879 Service Manual

For mechanics, maintenance teams and forklift owners working on the covered Yale 135VX and 155VX trucks, this manual provides a central reference for major mechanical, electrical, hydraulic and lifting systems.

Order the Yale D879 PDF Repair Service Manual from Manualskart to access the technical information for your forklift's service and repair work in a convenient digital format.

Frequently Asked Questions

Which models does the D879 manual cover?
The listed models are GC135VX, GLC135VX, GDC135VX, GC155VX, GLC155VX and GDC155VX.

What capacity classes are these forklifts in?
The 135VX models belong to the 13,500 lb class, while the 155VX models belong to the 15,500 lb class. Always check the individual truck's capacity plate for its actual rating.

Does the manual include transmission and hydraulic repairs?
Yes. The listed contents include powershift transmission repair, drive axle and differential service, hydraulic gear pumps and the main control valve.

Are electrical diagrams and mast information included?
The listed contents include electrical diagrams, wire-harness repair, calibration procedures and mast and cylinder repair sections for applicable configurations.

Will I receive a paper manual?
No. This product is supplied as a digital PDF manual rather than a printed book.