4500kg 70mm Ball Coupling – CTA-060782

What is a CTA?

A CTA is a certification given to automotive parts that meet applicable Australian Design Rules (ADR) and Road Vehicle Standards (RVS). Each approval is unique to the component, hence why approval is issued as a unique CTA number.

Learn more about trailer and caravan road vehicle compliance here.

Learn specifically about Australian Design Rule 62/02 (Mechanical Connections Between Vehicles) here.

Learn about all relevant Australian Design Rules and other regulations here.

What is a “D-Value”?

• Basically, your D-value tells you how much weight can be transferred to the towbar without the trailer becoming unstable.
• Once the downward weight is higher than your towing part’s recommended D-Value, the D-value product can break. There can be some serious consequences if this occurs.

D-Value Calculation:

T = Total weight of the towing vehicle (GVM)
C = Sum of the axle loads of the central-axle trailer (ATM)
g = 9.81m/s, the gravitational pull/acceleration.

• D-Value can only be calculated with the permissible total weight of both towing vehicle and trailer.
• Additionally, the calculated D-Value can be equal or lower than the D-Value of the hitch and of the towing eye.

Is a 70mm coupling’s bolt hole pattern the same as a 50mm coupling’s bolt hole pattern?

• No, a 70mm coupling’s bolt hole pattern is different to that of a 50mm coupling’s.

How do I install this coupling?

1. Install a 4.5t electric coupling over the tow ball.
2. Remove the nut.
3. Adjust the side bolt until tight, then back it off 1/2 turn.
4. Reinstall the nut and retighten it.
5. This nut puts pressure on the coupling tongue to prevent decoupling.
6. Repeat the installation instructions if the 4.5t electric coupling starts feeling loose.

• It is essentially an “R” clip, a lynchpin, or another suitable device, such as a padlock, placed behind the handle’s lower part.
• Use 4 x 5/8″ Grade 12 bolts of suitable length, washers, and nylocks. It must be bolted to the drawbar and cannot be welded to it.

Do we sell the handle seperately? Do we sell spare parts for this product?

We do not sell the handle by itself, or sell parts for this coupling.

Our Service Lifetime Warranty

Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.

Couplemate™ is a manufacturer and vendor of high-quality towing, trailer, and caravan components. Couplemate™ Core Goods and Custom Work are guaranteed to be free of defects for the service lifetime of the product when used as intended.

Warranties are non-transferrable and Couplemate™ requires satisfactory proof of purchase prior to issuing a remedy. The full Couplemate™ Warranty Policy can be found in the Terms & Conditions: Section 8 – Consumer Guarantees & Warranty.

Warranties are in addition to your rights under the Australian Consumer Law. If something is wrong with your order, please contact our team.

60-Day Returns

After 60 years of experience, we know that life has its unpredictable moments.

All Couplemate™ orders (online, over the phone, or in-store) have a 60 day period for change-of-mind returns and exchanges. There are some items that can’t be returned and some returns may incur a 15% restocking fee.

You can view our full policy for change-of-mind returns here.