1991 DHL trailer Master Cylinder rebuild kit???

[gregoryrbaker]

My hydraulic actuator unit is welded (from the factory) to the removable tongue.  I need a new master cylinder and reservoir to fit the existing unit. Where can I find one to fit the existing DHL unit?         What does the "Clunk" indicate when starting to pull or stopping??

Edited April 18, 2020 by gregoryrbaker
needed to add a question.

[Eagleboy99]

IT is probably an Atwood unit. https://www.pacifictrailers.com/blogs/boat-trailer-tips-advice/atwood-hydraulic-brake-actuator-parts-list-and-schematic  Or etrailer.com

[gregoryrbaker]

What does the "Clunk" indicate when starting or stopping?

Thank you for your help.

[Eagleboy99]

33 minutes ago, gregoryrbaker said:

What does the "Clunk" indicate when starting or stopping?

Thank you for your help.

It could be something as simple as your ball mount moving in the receiver.  There are kits to stop that. Like https://www.etrailer.com/Hitch-Anti-Rattle/Lets-Go-Aero/63232.html Or it could be your actuator bottoming out.

[justgary]

On 4/18/2020 at 1:08 PM, Eagleboy99 said:

It could be something as simple as your ball mount moving in the receiver.  There are kits to stop that. Like https://www.etrailer.com/Hitch-Anti-Rattle/Lets-Go-Aero/63232.html Or it could be your actuator bottoming out.

That's very likely since the drawbar tends to fit a little loose, and the pin is loose too. 

Could also be a loose ball, loose removable tongue, or other loose parts. 

I generally take the clunk as a reminder that I'm towing something.