Expansion tanks

[StarTech]

Hmmm I don't see anything there about these vents.

Even if you are refferring to the PDF page, it don't mention a vent valve.

Now the HG 55995 vent here is an one way valve allowing air in but nothing out. Actually tested them here and then put the vent back into inventory.So previously said the drain port is where you should attach the hoses apparently. Now the vent is a 9/16-18 thread.

 

[21Mav]

Look on page 12 of the service manual.

Yep and here it is blown up. My maverick with the 3200s looks the same... wonder if there's a passage way were there's only air

 

[StarTech]

I found my problem here with the manual mine is a 2020 and the newer 2023 SM is different...Updating my files to the newest repair manual. So I can be on the same page guys. Just download the older from HG back in January.

Boy I free like an idiot for not checking if a newer manual was out.

IF we look in the 2023 manual page 28 (PDF page 30) HG explains this new feature. There is an internal expansion tank that was added to some version of these transaxle.

 

[7394]

Yep many newer hydros have the "internal Expansion tank" So it requires the 2 barb fitting (So it can vent while filling) in the You Tube I posted from H-G. https://www.hydro-gear.com/oil/

My Scag has them & my fitting is ready & waiting..

 

[StarTech]

The external expansion tank fitting is BB 024-1200-00 but if you search for 4603-6-6 fitting it is same and is about a third to a quarter of the BB price.

This is the 45 degree one and the HG straight version is PN 71393. Note they do use different size connecting hose barbs.