Dunstan introduces new system to solve wear problem

Presented by

Case hardened pin assembly Case hardened pin assembly Case hardened pin assembly
Case hardened pin and matched bush Case hardened pin and matched bush Case hardened pin and matched bush

Australian farm machinery manufacturer Dunstan has come up with a case hardened pin-and-bush matching solution to solve wear problem on chaser bins.

Dunstan introduces new system to solve wear problem
Dunstan claims to have solved chaser bin wear problems with its case hardened pin-and-bush matching solution.

A fully loaded chaser bin travelling at 25km/h across uneven paddocks puts a punishing load on running gear.

The downward force on tandem axle set-ups is concentrated at the centre pin pivot point, a known problem area on most bins with high rates of wear being quite common.

To make matters worse, the pivot pin can be difficult or even impossible to grease due to the downward pressure.

Paddock bin manufacturer Dunstan claims to have solved the problem with the introduction of a system that matches machined case-hardened pins and bushes.

It also features a side-mounted nipple that makes it easier to get grease into the housing. But even if greasing is incomplete, the case hardened pin is wear resistant and will last longer than conventional systems.

Dunstan Director Craig Miller says that even though pivot pin wear is a known problem, many farmers don't take it into consideration when making a purchase decision.

"Our system is a real improvement and ensures the longevity of the product which ultimately reduces maintenance costs," he says.

"With headers getting bigger and faster all the time, grain handling at harvest is becoming a high-pressure event. The last thing farmers need to be worrying about is down time for maintenance or repairs."

Dunstan's Chief Design Engineer Ian Banfield says the company looked at and tested various alternatives but the case-hardened pins have proved to be the best solutions.

"We also use over-spec'd Australian hubs and stubs. Our biggest bins weigh over 40 tonnes all up and the big tractors really move them along these days," he says.

"That's why we use the best quality running gear. Then we don't have any problems."

For further information on the new Dunstan case-hardened pivot pin system, phone 03 5452 1488 or email

Subscribe to our newsletter

Sign up to receive the Trade Farm Machinery e-newsletter, digital magazine and other offers we choose to share with you straight to your inbox

You can also follow our updates by liking us on Facebook


Graders For Hire | Cranes For Hire | Telehandlers For Hire | Excavators For Hire