2020 Volvo VAH 640 Service and Repair Manual

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Fits the 2020 VAH 640 — Base Tractor Truck - Long Conventional 2-Door ·
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2020 Volvo VAH 640 service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Designed for technicians and DIY owners, this manual helps you troubleshoot accurately, follow step-by-step repair procedures, and reference wiring diagrams and system sections quickly while you work.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Wiring diagrams and electrical sections
  • Powertrain, brakes, steering, suspension, HVAC and more

Trims covered

  • Base Tractor Truck - Long Conventional 2-Door

Engines covered

  • 10.8L 661Cu. In. l6 DIESEL SOHC Turbocharged
  • 12.8L 780Cu. In. l6 DIESEL SOHC Turbocharged

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Hybrid & Electric Vehicle Systems
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams
NHTSA #25V75300003/11/2025Component: SEAT BELTS:FRONT:ANCHORAGE

Volvo Trucks North America (Volvo Trucks) is recalling certain 2019-2026 VAH trucks. The passenger seat belt anchor may fail due to inadequate floor reinforcement. As such, these vehicles fail to comp

Consequence

A seat belt anchor that fails will not properly restrain an occupant in a crash, increasing the risk

Remedy

Dealers will install a new weld nut and washer, free of charge. Owner notification letters were mail

NHTSA #20V53600002/09/2020Component: SERVICE BRAKES, AIR

Volvo Trucks North America (Volvo Trucks) is recalling certain 2020-2021 VAH, VHD, VNL and VNR vehicles. The die cast pedal plate may break at one of its attachment points, possibly resulting in the

Consequence

A dislodged brake pedal would be inoperable, increasing a risk of a crash.

Remedy

Volvo Trucks will notify owners, and dealers will inspect and replace the pedal plates if required,

NHTSA #19V51000002/07/2019Component: POWER TRAIN:AUTOMATIC TRANSMISSION

Volvo Trucks North America (Volvo Trucks) is recalling certain 2019-2020 VAH, VHD, VNL, and VNR vehicles. The t-bolt clasps on the transmission auxiliary air tank straps may have been over-tightened,

Consequence

The deformation of the air tank strap t-bolts may cause the t-bolt to disconnect from the strap allo

Remedy

Volvo Trucks will notify owners, and dealers will inspect and replace the air tank strap, if necessa

NHTSA #19V50900002/07/2019Component: ELECTRICAL SYSTEM:WIRING:FUSES AND CIRCUIT BREAKERS

Volvo Trucks North America (Volvo Trucks) is recalling certain 2018-2020 VAH, VHD, VNL, and VNR vehicles. The fuse in the transmission circuit may blow, preventing the transmission from shifting.

Consequence

If the fuse blows the transmission may not shift, increasing the risk of a crash.

Remedy

Volvo Trucks will notify owners, and dealers will inspect and replace the fuse, if necessary, free o

No service bulletins No technical service bulletins on file with NHTSA for the 2020 Volvo VAH 640.
No complaints filed No consumer complaints on file with NHTSA for the 2020 Volvo VAH 640.

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