Electric Caravan Trailer Coupling to suit 70mm Tow Ball
4.5t electric caravan trailer coupling with park brake is ADR Approved (CTA-045126) and is recommended for use with Grade 12 Bolts.
Hole Spacings: 184mm x 56mm x 16mm.
An example of a rating is a 10-t trailer towed by a 10-truck; the D-value is 49kn. (Refer to the table below for the calculation of your towing combination.)
Another example is a 20-ton truck that can tow a 6-ton trailer; the D-value is 45kN. The table below shows variable towing capacities.
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CTA Road Vehicle Component Type Approval
This coupling has been granted a component type approval under section 177 of the Road Vehicles Standards Rules 2019. The component fully complies with the applicable national road vehicle standards.
CTA Approval CTA-045126 will be available for download upon purchase. Vehicle inspectors may want to see this certificate for registration and certifications.
You can read more about a Component Type Approval and what it means for you here.
Specifications
- The mounting structure must support the rated capacity of this coupling.
- Use four 5/8″ socket head cap screws and torque to 287Nm.
- Removing the hand brake attachment if used for a boat trailer is permissible.
- Max Torque is 100 ft/lbs
- D-Value 23.24kN
- CTA-045126
Purchase 70mm tow ball with CTA approval here.
CM235 – 4.5t Electric Coupling Installation Instructions
- Install 4.5t electric coupling over the tow ball.
- Remove the nut.
- Adjust the side bolt until tight, then back off the bolt 1/2 turn.
- Reinstall the nut and retighten it.
- This nut puts pressure on the coupling tongue to prevent decoupling.
Repeat the installation instructions if the 4.5t electric coupling starts feeling loose.
It is essentially an “R” clip, 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 and cannot be welded to the drawbar.
Marine Applications
Marine brakes use hydraulic brakes and do not require the park brake attachment on the 4.5t electric coupling. This attachment is for use with electric brakes.
Cutting the brake handle from the coupling is permissible without altering its integrity. Why? Therefore, the park brake attachment is optional and not part of the testing procedures.
Important Notice
The approval letter’s CTA is the same as the one on the invoice.
Show vehicle inspectors this Invoice during your trailer or vehicle inspections if required.
Regulations for Towing and Accessories over 4.5t
© Steve Wotherspoon May 10 2014
Additional information
Weight | 10 kg |
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Dimensions | 40 × 30 × 20 cm |
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