This comprehensive Service Repair Manual provides in-depth information for maintaining, assembling, disassembling, and servicing your Yale GDP135VX, GDP155VX, GLP135VX, GLP155VX, GP135VX, and GP155VX (C878) forklift trucks. The manual covers a broad range of topics including:

**Cummins Powertrain:** Detailed instructions for the B4.5RGT engine, including a complete overhaul manual for the 1991 model year.

**Operator's Cab:** Comprehensive coverage of the operator's cab, including assembly, disassembly, and maintenance procedures.

**Frame:** Thorough guidance for the repair and maintenance of the frame, ensuring structural integrity and longevity.

**Cooling System:** Step-by-step instructions for maintaining and repairing the cooling system, including troubleshooting common issues.

**GM Powertrain:** Detailed information for the GM 4.3L V-6 engines, including fuel system components, ignition system, and cooling system.

**Drivetrain:** In-depth instructions for the three-speed and two-speed Powershift transmissions, drive axle and differential assembly, and brake system.

**Hydraulics:** Clear explanations for troubleshooting and repairing hydraulic systems, including the hydraulic gear pump, main control valve, and cylinder repair.

**Mast Repairs:** Detailed instructions for repairing the mast, covering several serial numbers including A513, A514, A613, A614, A702, A703, A704, A705, A706, A707, A751, A752, B513, B514, B586, B587, B588, B589, B590, B591, B749, B750, B751, B752, B753, and B754.

**Electrical System:** Comprehensive coverage of the electrical system, including wire harness repair, user interface, and electrical components.

**Reference Material:** Includes metric and inch (SAE) fasteners, calibration procedures, diagrams and schematics, capacities and specifications, periodic maintenance schedules, and diagnostic troubleshooting guides.

This manual is 100% complete and intact, with no missing or corrupt pages. It is fully bookmarked and searchable, making it easy to find the information you need quickly.

The Yale GDP135VX, GDP155VX, GLP135VX, GLP155VX, GP135VX, and GP155VX (C878) forklift trucks represent a range of robust and versatile material handling solutions designed for various industrial applications. These models are known for their reliability, performance, and operator comfort, making them a popular choice for businesses across different sectors. The GDP and GLP models are electric forklifts, distinguished by their fuel-efficient operation and reduced emissions, making them ideal for indoor environments and applications where noise and pollution are a concern. The GP models, on the other hand, are powered by internal combustion engines, providing greater power and flexibility for outdoor operations and demanding tasks. Common features across these models include a compact design for maneuverability in tight spaces, a variety of mast options for different lifting heights, and advanced operator controls for precise handling and safety.

The Yale GDP135VX, GDP155VX, GLP135VX, GLP155VX, GP135VX, and GP155VX (C878) forklifts are designed with a focus on operator comfort and safety. The spacious operator compartment offers ergonomic controls and excellent visibility, reducing fatigue and enhancing productivity. The trucks are equipped with advanced safety features such as load-sensing hydraulics, automatic braking systems, and emergency stop buttons, ensuring a secure and efficient work environment. Additionally, the user-friendly design and intuitive controls make these forklifts easy to operate, even for less experienced operators. These models are also known for their durability and long lifespan, thanks to high-quality components and robust construction, making them a worthwhile investment for businesses seeking reliable and efficient material handling solutions.