PLT/Attachments/TBT-PLT-008

Quick Hitch Safety

Plant & Equipment › Attachments › Quick Hitch Safety

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A quick hitch allows rapid changing of excavator attachments such as buckets, breakers, and grabs without manual pin removal.
Quick hitch failures have caused multiple fatalities in the UK when buckets detached and fell onto workers below.
Only fully automatic quick hitches with a secondary locking mechanism are acceptable on UK construction sites.
Semi-automatic quick hitches that require the operator to leave the cab to manually insert a safety pin are no longer acceptable.
The operator must confirm both the primary and secondary locking mechanisms are fully engaged before lifting any attachment.
A visual and physical check from outside the cab must verify the coupler is correctly seated and locked after every change.
The attachment weight must not exceed the quick hitch rated capacity — overloading causes structural failure of the coupler.
Quick hitches must be inspected daily as part of the excavator pre-use check and included in thorough examinations.
All quick hitches must carry a current thorough examination certificate under LOLER 1998.
A dropped bucket from a failed quick hitch kills instantly — this single component deserves the highest level of attention.

Fatal bucket drop	A detached excavator bucket weighing over 500kg kills anyone beneath it — fully automatic quick hitches prevent this.
Secondary lock	The secondary locking mechanism is the failsafe — without it, a single pin failure drops the attachment without warning.
Visual confirmation	The operator cannot confirm correct engagement from inside the cab alone — an external check is mandatory after every attachment change.

Don't

Use only fully automatic quick hitches with a secondary locking mechanism.
Confirm both primary and secondary locks are engaged before using the attachment.
Carry out a visual and physical check from outside the cab after every change.
Verify the attachment weight does not exceed the quick hitch rated capacity.
Inspect the quick hitch daily as part of the excavator pre-use check.
Ensure the quick hitch has a current LOLER thorough examination certificate.
Test the attachment by lifting it slowly and tilting before working near people.
Train all operators on the specific quick hitch model fitted to their machine.
Replace worn or damaged locking pins, catches, and springs immediately.
Maintain an exclusion zone around the excavator when changing attachments.

DON'T use semi-automatic quick hitches that require manual pin insertion from outside.
DON'T lift or use an attachment without confirming both locks are fully engaged.
DON'T skip the external visual check — the cab view cannot confirm correct locking.
DON'T exceed the quick hitch rated capacity with oversized or heavy attachments.
DON'T operate with a quick hitch that has not been inspected during the pre-use check.
DON'T use a quick hitch without a current LOLER thorough examination certificate.
DON'T swing a newly attached bucket over people before testing it clear of workers.
DON'T operate a quick hitch model you have not been specifically trained to use.
DON'T continue using a quick hitch with worn pins, catches, or damaged components.
DON'T allow anyone beneath the attachment during the changing and testing process.

See also: 360 Excavator Safety | Plant Pre-Use Inspections

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