Westfalia 314 304 Tow Bar Installation and Operating Instructions for Opel Antara

Product Overview

This document provides installation and operating instructions for the Westfalia 314 304 tow bar designed for the Opel Antara vehicle.

Brand: Westfalia Automotive

Model: 314 304

Vehicle Compatibility: Opel Antara

Part Number: 314 304 691 101 - 36/07 - 002

Technical Specifications

The D-Value is determined according to European Directive 94/20 as follows: D = (T x C) / (T + C) x 0.00981, where T is the maximum permissible mass of the towing vehicle and C is the maximum permissible towing mass of the trailer.

Parts List

The following components and fasteners are included in the kit:

• 2x M12x80 bolts (Strength Class 10.9)
• 12x M12x40 bolts (Strength Class 8.8)
• 2x M10x40 bolts (Strength Class 10.9)
• 4x M10x30 bolts (Strength Class 10.9)
• 3x 13x24x2.5 washers/spacers
• 16x 12.5x30x3 washers/spacers
• 10x 10.5x30x3 washers/spacers
• 6x M12 nuts (Strength Class 10)
• 4x M10 nuts (Strength Class 10)

Refer to the assembly diagrams for specific placement of each part.

General Safety and Operating Instructions

Important: Always observe national guidelines concerning official approval and installation of tow bars.

• Any alteration or conversion of the tow bar is strictly prohibited and will result in the cancellation of the type approval.
• Before installation, remove any insulating compound or underseal (if present) from the vehicle's mating surfaces where the tow bar will be attached.
• The tow bar is designed for towing trailers equipped with ball couplings and for use with load-bearing implements approved for attachment to the tow bar. Any use other than specified is prohibited.
• Parking Assistance Systems (PDC): Vehicles equipped with parking assistance systems may experience malfunctions after tow bar installation. This can occur if the tow bar components (ball bar, coupling ball) are within the sensor detection area. If this happens, the sensor detection area should be readjusted, or the parking assistance system deactivated. Malfunctions are not expected with detachable or pivoted ball bars if the ball bar is removed from its operating position.
• Clearance Requirements: Ensure the clearance specified in Appendix VII, Diagram 30 of Guideline 94/20/EC is maintained. This includes specific dimensional requirements such as:
  • Maximum angle: 45°
  • Minimum clearance from vehicle body: 32 mm
  • Minimum clearance from vehicle body: 140 mm (vertical)
  • Minimum clearance from vehicle body: 55 mm
  • Maximum clearance: 100 mm
  • Minimum clearance: 65 mm
  • Minimum clearance: 45°
  • Minimum clearance: 45°
  • Distance: 350 - 420 mm
  • Maximum angle: 30°
  • Maximum radius: R 14.5
  • Maximum radius: R 40
• Towing Capacity: The towing capacity is indicated by the vehicle's maximum permissible gross vehicle weight.
• Usage Limits:
  • Maximum towing speed: 0 km/h (This likely refers to a specific test condition, not general use. A more general interpretation is that towing requires adherence to speed limits, but the diagram implies a comparison between 0km and 1000km, possibly related to testing or endurance.)
  • Maximum towing distance: 1000 km (This likely refers to a test condition or a limit for initial use after installation, not a general limit.)
  • Maximum load for accessories: 24 kg
  • Maximum combined load (tow bar + accessory): 24 kg

(Note: The "0km" and "1000km" indicators in the diagram are not standard towing capacity measures and might refer to specific testing protocols or initial break-in periods. The "x" and "x+24kg" likely refer to the weight of the tow bar itself plus an accessory.)

Installation Steps

The following steps outline the installation process. Refer to the diagrams for visual guidance.

Step 1: Vehicle Preparation

Identify the rear of the Opel Antara. Locate the designated mounting points on the vehicle's chassis. Remove any protective covers or plugs from the vehicle's chassis to access the mounting holes.

Step 2: Attach Chassis Mounting Brackets

Secure the left-side chassis mounting bracket (part 5) and the right-side chassis mounting bracket (part 6) to the vehicle chassis using the specified fasteners: two M12x40 bolts and two 12.5x30x3 washers for each bracket. Ensure correct orientation as per the diagram. A warning symbol ⚠️ indicates the use of M12 fasteners and a hand gesture ✋ suggests tightening.

Step 3: Attach Tow Bar Brackets

Attach the left tow bar bracket (part 3) and the right tow bar bracket (part 4) to the vehicle chassis using the specified fasteners: one M10x30 bolt with a 10.5x30x3 washer, and one M12x40 bolt with a 12.5x30x3 washer for each bracket. A warning symbol ⚠️ indicates the use of M12/M10 fasteners and a hand gesture ✋ suggests tightening.

Step 4: Connect Main Tow Bar Assembly

Attach the main tow bar assembly (part 1) to the previously installed tow bar brackets (parts 3 and 4). Use the following fasteners: M12x40 bolts with 12.5x30x3 washers for the upper holes, and M10x40 bolts with 10.5x30x3 washers for the lower holes. A warning symbol ⚠️ indicates the use of M12/M10 fasteners and a hand gesture ✋ suggests tightening.

Step 5: Secure Main Tow Bar Assembly

Ensure the main tow bar assembly is correctly positioned and secure all fasteners. Torque specifications are provided:

• M12 bolts: 65 Nm
• M10 bolts: 55 Nm

Step 6: Attach Ball Mount Assembly

Attach the ball mount assembly (part 2) to the main tow bar assembly (part 1). Use two M12x80 bolts and two 13x24x2.5 washers. A warning symbol ⚠️ indicates the use of M12 fasteners and a torque specification: M12 = 95 Nm.

Step 7: Final Installation Check

The tow bar is now installed on the Opel Antara. Ensure all fasteners are tightened to the specified torque values and that all components are securely fitted. The final assembly should resemble the illustration in Figure 8.

Declaration of Correct Installation

This section is a declaration by the installer confirming that the tow bar has been correctly fitted according to the manufacturer's instructions and vehicle specifications. It includes fields for the tow bar type, vehicle details, license plate, company stamp, and signature. The installer also declares that the vehicle user has been informed about the use and maintenance of the tow bar.