S-COGA-2100-P-N
S-COGA-2100-P-N
⚠️ Not sure if this part fits your trailer? Please check before ordering.
Email parts@brianjamestrailers.co.uk with your trailer VIN number before placing your order and we'll confirm compatibility and/or SKU code for you.
Please note: We do not accept returns on incorrectly ordered parts. Taking 60 seconds to confirm fitment now can save you significant time and cost.
Genuine rubber gaiter (bellows) for the Bradley HU12 overrun coupling fitted with the AL-KO A351 locking head. This accordion-style rubber sleeve protects the sliding drawtube from dust, grit, and moisture — keeping your coupling operating smoothly and your brakes responding correctly.
Key Specifications:
- Part Number: S-COGA-2100-P-N
- Designed for: Bradley HU12 overrun coupling with AL-KO A351 locking head
- Fits: 50mm tow ball / draw tube overrun devices
- Material: Durable rubber (bellows/accordion construction)
- Type: Protective drawtube gaiter
About the Bradley HU12 Coupling:
The Bradley HU12 is a heavy-duty overrun coupling rated for up to 3,500kg. It features a hydraulic over-run damper that manages braking force relative to the towing vehicle, providing smooth and progressive trailer braking. Known for its delta or straight drawbar compatibility, it is typically finished in a heavy-duty galvanised or cast iron housing — built for durability in demanding towing conditions.
About the AL-KO A351 Locking Head:
The AL-KO A351 (AK351) is a cast steel hitch head designed for high-weight capacities, gripping the 50mm tow ball securely. It features:
- Integrated lock hole — accepts a barrel lock to secure the trailer to the vehicle or lock it while uncoupled, preventing theft
- Wear indicator — a visual gauge on the side shows if the tow ball or internal hitch jaws are worn and need attention
About the Gaiter (Bellows):
The rubber accordion sleeve sits behind the locking head and protects the sliding drawtube from dust, grit, and moisture. If this rubber splits:
- Grease can escape from the drawtube
- Dirt and moisture can enter the coupling mechanism
- The coupling can begin “sticking” or “snatching” when braking
Replacing a split gaiter promptly is a small investment that protects the much more expensive coupling assembly.
Benefits:
- Protects the drawtube and internal coupling mechanisms from dirt and water
- Prevents corrosion of critical brake linkages
- Extends coupling service life significantly
- Maintains smooth, progressive overrun brake operation
- Essential for Australian conditions (dust, mud, coastal salt)
- Prevents costly coupling repairs and replacements
Confirmed Compatible Models:
- 476-2718-30-2-10 — Connect 476, 2.7m deck length, 1.8m width, 3,000kg GVM, single axle, 10″ wheels
- 476-3118-30-2-10 — Connect 476, 3.1m deck length, 1.8m width, 3,000kg GVM, single axle, 10″ wheels
- 476-3618-30-2-10 — Connect 476, 3.6m deck length, 1.8m width, 3,000kg GVM, single axle, 10″ wheels
Always verify your trailer's chassis plate before ordering to ensure correct fitment.
When to Replace:
Inspect your coupling gaiter regularly and replace if you notice:
- Cracks, splits, or tears in the rubber
- Perishing or hardening of the material
- Loose or detached mounting
- Visible dirt or water inside the coupling
- Coupling sticking or snatching during braking
- As part of annual coupling maintenance
Installation Note: Ensure the gaiter is properly seated at both ends. Clean the coupling mechanism before installing the new gaiter. Check for proper fit and secure mounting before towing.