Black water tank replacement '74 Land Yacht rear bath

[wayneelan]

Thanks again for all of the great information, I am still kinda confused, I have a 27' 1974 Rear Bath, My Airstream has the International Sign on the side, but is it the Overlander also?

[bhutch74ly]

Originally Posted by wayneelan

Where do I get a copy of the Manual that these pics come from?

I recently purchased the Owners Manual and a Service Manual on CDs from Vintage Literature Reproductions. The Service Manual was $13.99 plus $2.99 for shipping and handling. I think the Owners Manual was the same price. I strongly recommend you purchase them for your "new" 74 model.

[SummitAir]

Inlandrv.com has the replacement tank. I have a 1970 27' International Overlander with the rear full bath and I had to replace mine as well due to age causing the plastic tank to get brittle. I got a black one from Andy at inlandrv.com. As far as how to do it? I lowered the front jack as far down as possible and raised the rear jacks as far as possible making sure the unit was stable. I just started taking it apart by dropping the rear belly skin enough to expose the box that houses the tank. It was in bad shape so I had a sheet metal shop down the street fab me a new one. Bought new styrofoam at Lowes and cut it to shape to fill the gaps and insulate the tank from cold. After that I just took it all apart and put it back together in reverse order. While I was at it I replaced the dump valve new from inlandrv.com, cut out the dropped belly skin and replaced it with a new sheet of sheet metal and replaced the supporting crosss member angle iron pieces with new improved ones that required drilling some new holes in the main frame. Also replaced some rear exposed floor rot by splicing in a new piece and installed a new toilet. Had to use some rubber hose clamp type sleeves to reconnect the ABS black plastic black tank vent piping. If you are not fairly advanced with handyman skills you should let a RV repair place do it for you. It will almost asssuredly require some self applied adaptations to make it all work but I saved a ton of money doing it myself and feel like it is better than the original.

[bhutch74ly]

Originally Posted by SummitAir

Inlandrv.com has the replacement tank. I have a 1970 27' International Overlander with the rear full bath and I had to replace mine as well due to age causing the plastic tank to get brittle. I got a black one from Andy at inlandrv.com. As far as how to do it? I lowered the front jack as far down as possible and raised the rear jacks as far as possible making sure the unit was stable. I just started taking it apart by dropping the rear belly skin enough to expose the box that houses the tank. It was in bad shape so I had a sheet metal shop down the street fab me a new one. Bought new styrofoam at Lowes and cut it to shape to fill the gaps and insulate the tank from cold. After that I just took it all apart and put it back together in reverse order. While I was at it I replaced the dump valve new from inlandrv.com, cut out the dropped belly skin and replaced it with a new sheet of sheet metal and replaced the supporting crosss member angle iron pieces with new improved ones that required drilling some new holes in the main frame. Also replaced some rear exposed floor rot by splicing in a new piece and installed a new toilet. Had to use some rubber hose clamp type sleeves to reconnect the ABS black plastic black tank vent piping. If you are not fairly advanced with handyman skills you should let a RV repair place do it for you. It will almost asssuredly require some self applied adaptations to make it all work but I saved a ton of money doing it myself and feel like it is better than the original.

Thanks for the good information on your successful remodel. I've decided to purchase a couple of aftermarket tanks in order to increase the gray water storage capacity. One of the on-line vendors has tanks will better utilize the available space between the floor and belly pan than the OEM tanks. They will also spin-weld female pipe thread fittings where I need them for drains, vents, and inlets for a small additional fee. Since I'm doing a complete rebuild of my bathroom anyway, this seemed like a good idea. I hope I will feel this way when I'm finished!

[Aage]

Originally Posted by wayneelan

Thanks again for all of the great information, I am still kinda confused, I have a 27' 1974 Rear Bath, My Airstream has the International Sign on the side, but is it the Overlander also?

My '74 TT is a Sovereign of the Road International Land Yacht. Years ago, the Flying Cloud was merged with the Safari. Now, the Safari model is back to being named the Flying Cloud.

All that to say, you have a '74 27-foot Overlander, rear bath. You'll find the information for that in the Service Manual.

For example, here is the frame diagram for the 1974 23' and 31' models.