The ARB Air Locker Bulkhead Fitting Kit (Part #170114) is an essential component for connecting air lines to ARB air-operated locking differentials. This guide will break down the diagram provided, explain each part's function, and provide helpful notes for proper installation.
Components of the Bulkhead Fitting Kit
This kit includes several components designed to ensure a secure and leak-free connection between the air supply line and the ARB differential. Below is a detailed breakdown of each part, their corresponding part numbers, and their role in the assembly:
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Banjo Bolt (6mm)
The banjo bolt (Item #01) secures the banjo elbow and washer to the differential body. This bolt plays a critical role in maintaining pressure and airflow to the differential.
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Banjo Washer
Banjo washers (Item #02) are placed on either side of the banjo elbow (Item #03) to prevent air leaks at the connection point. It's essential to use both washers for a proper seal.
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Banjo Elbow (1/8" BSP)
The banjo elbow (Item #03) allows for a smooth transition between the air line and the differential. This elbow fitting ensures that the air line can be connected at the appropriate angle to reduce strain.
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Compression Fitting Body (6mm)
The compression fitting body (Item #04) secures the air line into place. It uses compression to lock the air line securely, preventing air from escaping.
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Outer Compression Nut (6mm)
The outer compression nut (Item #05) works with the compression fitting body to tightly hold the air line, ensuring that it remains in place during operation. This is crucial for maintaining a constant air supply.
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Airline (6mm)
The airline (Item #06) transmits compressed air from the external compressor to the ARB locker, engaging the differential when needed. In this kit, a 6mm airline is used.
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Ferrule (6mm)
The ferrule (Item #07) helps provide a firm grip on the airline inside the compression fitting. It is a small ring that compresses around the air line when the fitting is tightened, ensuring a leak-proof seal.
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Center Compression Nut (6 to 3.5mm)
The center compression nut (Item #08) allows for a step-down connection from the 6mm airline to the 3.5mm copper airline, which is typically used for smaller or more specialized applications.
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Spacer
The spacer (Item #09) provides the proper alignment of components within the bulkhead fitting, ensuring smooth and effective air flow.
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O-ring (BS006 N90)
Two O-rings (Item #10) are included in this kit to create a seal within the assembly, preventing leaks where components connect. O-rings are critical for maintaining air pressure.
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Bulkhead Body
The bulkhead body (Item #11) is the central part of the fitting that connects to the axle housing. It secures the air lines and creates a junction between the external and internal air lines.
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Push-in Fitting (6mm)
The push-in fitting (Item #12) allows for a quick and easy connection of the air line without requiring additional fittings or tools. It simplifies the installation and provides a secure connection.
Specs for the ARB Bulkhead Fitting Kit
- External Tube Size: 6mm
- Internal Tube Size: 3mm
- Bulkhead Thread: 1/4" NPT
These specifications indicate the sizes for the air lines and the thread type used to secure the bulkhead body to the differential housing. It's crucial to use the correct tubing and threading to avoid leaks or malfunctioning of the air locker.
Installation Tips and Notes
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Air Line Not Included
While this kit includes the components needed to connect the air line, the air line itself is not included. You'll need ARB PN #710314.
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O-ring Pack Availability
Replacement O-rings are available in packet #160256, which can be helpful if your O-rings become damaged or worn out over time.
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Air Line from Seal Housing
The air line runs from the axle seal housing. Ensure the air line is routed properly to prevent kinks or sharp bends that could compromise air flow.
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Complete Fitting Availability
The complete fitting kit is available as part #170214. Additionally, the ferrule can be purchased separately under part #170132.
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Elbow Fitting Options
If installing with a 5mm x M5 elbow, use part #170216. For a 6mm x 1/8 BSPP elbow, use part #170217, which provides flexibility based on your specific setup.
Final Thoughts
The ARB Air Locker Bulkhead Fitting Kit is a crucial component for maintaining a reliable air connection to your ARB air locking differential. By understanding the purpose of each part and following proper installation procedures, you'll ensure that your air locker functions smoothly, providing on-demand traction when you need it most.
Whether you're a professional installer or a DIY enthusiast, make sure to use high-quality parts, follow torque specifications, and ensure that all connections are secure to avoid air leaks or performance issues.
For more detailed installation instructions or to purchase additional components, visit ARB's website or consult your local dealer.