Service manual for mares 28 xr and HR

[Chris-Wood]

It's 2025, are we still in the dark with the 28HR?

I have a few of them and looking to put them in to use on stages, so need them to be oxygen clean. Has anyone got o-ring sizes at least and I could make a kit up from there?

 

[Zef]

It's 2025, are we still in the dark with the 28HR?

I have a few of them and looking to put them in to use on stages, so need them to be oxygen clean. Has anyone got o-ring sizes at least and I could make a kit up from there?

What are "we" in the dark about?

If you can get the service kit, servicing is straight forward similar to other Mares 1st stages, except there is no diaphram to remove as it is done away with on this model since it has the TBP in its place.

IP should be set to between 9.8-10.2 bar.

Here is one possible source for the service kit from the USA:

Service Kit - Mares XR Regulators

These are the OEM service kits for the Mares XR regulators ONLY. We do not have service kits for Mares brand regulators other than their XR line.

www.divegearexpress.com

Here is one possible source for the service kit from the EU:

Service kit Mares 28XR First Stage Service Kit

Mares 28XR First Stage Service Kit<br /> <br /> Available in:<br /> Nitril, air and nitrox up to 40%<br /> (*) Diaphragm not included.

www.scubasupport.nl

If you can't get a hold of the service kit, then check the diagram posted earlier in this discussion thread, there are o-ring sizes listed for some, and the others have reference numbers that you can use to cross reference with your o-ring supplier of choice....it would probably be helpful if you measured your o-rings to compare to what the reference numbers cross reference to in actuality....or bring them with you to your brick and mortar o-ring supplier to help ensure they match up correctly.

-Z

 

[lowwall]

It's 2025, are we still in the dark with the 28HR?

I have a few of them and looking to put them in to use on stages, so need them to be oxygen clean. Has anyone got o-ring sizes at least and I could make a kit up from there?

I don't have a service manual, but here's the schematic and parts list.

 

[Tanks A Lot]

This might be helpful.

 

[Chris-Wood]

Awesome, just what I needed