Yale D878 GP135VX, GLP135VX, GDP135VX, GP155VX, GLP155VX & GDP155VX Forklift Pdf Repair Service Manual

Yale D878 GP135VX, GLP135VX, GDP135VX, GP155VX, GLP155VX & GDP155VX Forklift Repair Service Manual PDF

When maintaining a high-capacity Yale forklift, identifying the correct service information is an important first step toward an accurate repair. The Yale D878 GP135VX, GLP135VX, GDP135VX, GP155VX, GLP155VX and GDP155VX Repair Service Manual PDF provides technical reference material for the specified VX-series lift trucks, helping workshop technicians investigate faults, plan maintenance and service major truck systems.

Designed for forklift mechanics, fleet maintenance teams and equipment owners, this digital reference brings together information on powertrain systems, transmission, hydraulics, steering, braking, electrical components and lifting equipment. Because these model families include gasoline, LPG and diesel configurations, always confirm the engine and fuel system installed on your truck before following a procedure.

Service and Repair Topics Covered

The associated D878 service documentation lists the following workshop topics and technical sections. Coverage may vary by powertrain, mast serial number and equipment configuration.

• Operator cab and frame: Reference information for cab components and the truck's structural frame.
• Engine and cooling system: GM 4.3L V6 engine and cooling-system service topics for applicable configurations.
• Fuel systems: LPG and gasoline fuel-system sections, including related ignition-system information.
• Drivetrain: Transmission service information, including three-speed powershift transmission repair.
• Drive axle and differential: Assembly and repair reference information for drivetrain components.
• Brake and steering systems: Brake-system and steering-axle service topics.
• Hydraulic equipment: Hydraulic gear pump, hydraulic cleanliness procedures and main control valve information.
• Mast and cylinders: Cylinder repair and mast repair information for specified serial-number groups.
• Electrical systems: Electrical troubleshooting, wire-harness repair and user-interface information.
• Workshop reference sections: Calibration procedures, periodic maintenance, capacities and specifications, diagrams, schematics and metric/SAE fastener information.

Powertrain note: This D878 manual listing identifies GM 4.3L gasoline and LPG-related information. Do not assume that all diesel engine repair procedures are included in this particular edition. Confirm the engine fitted to your truck and verify diesel-specific coverage before ordering.

Yale D878 Model Compatibility

All six designations are listed under the D878 family. The GP, GLP and GDP prefixes distinguish powertrain configurations, so engine, fuel-system and diagnostic procedures must be matched to the actual truck. Check the model plate and serial number to confirm compatibility.

PDF Manual Specifications

Why Keep the D878 Manual in Your Workshop?

Forklift systems are interconnected, and a fault in one area can affect the operation of another. Having relevant technical information available can help technicians organize inspections, locate system-specific guidance and prepare for repairs without relying solely on general-purpose instructions.

• Find the appropriate service section before dismantling or adjusting components.
• Consult transmission and drivetrain information when investigating power-delivery problems.
• Refer to hydraulic, steering and brake sections when planning system maintenance.
• Check mast serial-number coverage before using cylinder or mast repair instructions.
• Use the PDF's searchable format, if supported by the supplied file, to locate relevant terms efficiently.

Confirm Compatibility Before Purchasing

Not every procedure applies to all six models. Engine type, fuel system, mast configuration, serial-number range and production changes can affect which information is relevant. Verify the full model designation and serial number, especially if you need engine-specific or mast-related repair instructions.

Follow appropriate workshop safety practices and use qualified personnel for work involving fuel systems, brakes, lifting equipment and pressurized hydraulic components.

Get the Yale D878 Forklift Repair Service Manual PDF

If you maintain a Yale GP135VX, GLP135VX, GDP135VX, GP155VX, GLP155VX or GDP155VX, this digital service reference can help you access information on the systems covered in the associated D878 documentation. Check the exact truck configuration and required repair coverage before purchasing to ensure the manual is suitable for your machine.

Frequently Asked Questions

Which Yale forklift models are covered?

The listed models are GP135VX, GLP135VX, GDP135VX, GP155VX, GLP155VX and GDP155VX in the D878 series.

Does the manual cover gasoline and LPG configurations?

The associated listing includes gasoline and LPG fuel-system sections, along with GM 4.3L V6 engine information. Verify the relevant section against your truck's powertrain.

Does it include transmission repair information?

Yes. The listed contents include three-speed powershift transmission repair, along with drivetrain and drive-axle information.

Does it include diesel engine repair procedures?

The model listing includes GDP diesel variants, but the cited D878 contents specifically identify GM gasoline and LPG-related engine sections. Confirm that the required diesel engine information is included in the edition being sold.

Are mast and cylinder repairs covered?

The associated contents list cylinder and mast repair sections for specified mast serial-number groups. Check your mast serial number before relying on a procedure.

Is the manual provided as a PDF?

Yes, the associated listing describes the service manual as a PDF document that can be opened with compatible PDF-reading software.