Grader Parts

Fully automatic Dual Positive Lock Hydraulic Quick Hitch/Coupler

RD Williams Excavator Parts & Hill Engineering have come together to offer the Australian market a fully automatic dual positive hydraulic quick coupler.

The Tefra Quick Hitch/Coupler offers a range of models to suit 3-120 Tonne Excavators, all makes & models.

Click here to view our range of Tefra Quick Hitch/Couplers
Phone RD Williams Excavator Parts on 07 3715 0800 to order or request more information about the Tefra Quick Hitch/Coupler.


 Product Information & Installation Guide for Tefra Quick Hitch/Coupler

Tefra Quick Hitch/Coupler Features & Benefits

The TEFRA Quick Hitch/Coupler offers the following features & benefits:

Dual Locking
– Tefra locks both the front and rear attachment pins in the event of a hydraulic failure.

Simplicity – Tefra has only three moving parts, the fewest of any double locking coupler.

Smart Valve – Hill Smart Valve ensures the attachment is in a safe position before the release sequence is permitted.

Single Cylinder Design – totally enclosed piston rod, no external pipes, eliminating the risk of damage.

Failure Indicator – a failure condition allows limited movement of the attachment upon the coupler indicating a problem.

Universal Pick Up
– Coupler has the ability to pick up attachments from different machine manufacturers within its weight range.

Quick HitchTefra Quick Hitch

Frequently Asked Questions

Meets AS4772-2008 Standards? Yes.

Complicant to future standards? Yes. Independent Government testing has passed the Tefra design to meet or exceed the proposed International ISO Standard.

Automatically locked into position? Yes. Front hooks closes first, then rear hook. Pins will be held firmly, even with slight variance in bucket pin centres.

Dual Lock Design? Yes. If the hydraulics fail, both pins remain locked into position. The bucket cannot swing on one pin.

Mechanical & Positive Safety System? Yes, see Safety Locking Mechanisms below.

Multiple Safety Locking Mechanisms?
1. Primary is Hydraulic activation.
2. Secondary is hook shape, where the geometry of the pick up forces the hooks to stay closed.
3. Third is Active Protection System consisting of two separate powerful springs that apply pressure to the hooks.

What happens if hydraulics fail? In an event of the hydraulic failing, the bucket stays on both pins through the safety systems, however, the bucket will have some movement on the pins to provide indication of failure to the operator.

Detach Sequence? Yes. The Smart Valve system does not allow the bucket to detached unless in the fully crowded in position.

What is a Smart Valve? A Smart Valve is a simple float device that prevents Hydraulic Oil from flowing to the cylinder unless the hitch is in the fully crowded in position.

Can the bucket become detached whilst digging? No. The operator must intentionally go through the re-lease sequence within the permitted release zone.

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