Vacuum Generator

J

Johnvtwin

New Member
Feb 25, 2018
12
Australia
Boat Info
Sedan Bridge 400 2000
Engines
4116 Catapillars
Hi All,
I would like to change the Duckbills in the Vacuum Generator! Has anyone previously replaced them and if so how difficult is it to get too?
Thank you
John
 
Not difficult but nasty. You need 4 per pump if I remember correctly.
 
Yes 4 per pump. It's not that hard to do. Search YouTube there are some decent video that explain the process. I recommend before you start dump an ounce of the blue stuff in the toilet and then hold up on your lever and fill toilet with water and flush. Then do 2 more cycles with just water. It flushes everything out and should help with smell and mess. Good Luck
 
Did mine last year. Took about 3 hours to remove pump assembly and dis assemble completely. Cleaned everything with a pressure washer, soaked with Lysol toilet cleaner and let sit for bout 20 minutes, rinsed thoroughly with a pressure washer and re assembled with new duck bills. Lots of corners in there that get buildup and do not empty. Some good rubber gloves and a strong will to just power through it are important tools. Hopefully good to go for several years with proper PM.
 
The duck bills come in two sizes. Make sure u know what size u have or get both sizes and return the ones u don't use. I think its 2" and 2 1/2 " but def make sure. U don't want it apart and u cant finish .

Rob
 
Thank you all for the heads up, if I may ask though, how do you get to the Vacuum Generator on a 400 Sedan Bridge?
Cheers
 
Johnvtwin said:
Thank you all for the heads up, if I may ask though, how do you get to the Vacuum Generator on a 400 Sedan Bridge?
Cheers
Click to expand...
There are two removable panels under the inward bunk of the guest stateroom. They are under those panels. Forward one is for the guest head. Aft vacuum generator is for the master head. I posted step by step instructions in the "40 Sedan Bridge" somewhere in there.

Here it is: http://clubsearay.com/index.php?threads/40-sedan-bridge-forum.53961/page-90#post-910767
 
Last edited:
Thanks Bill,
I really appreciate the advice and will get to the boat in a few days to get things working again.
Kind regards
John
 
I didn't find it to be a difficult job, but somewhat time consuming my first time. Look for an exploded drawing of your pump model, I found a couple which were useful in planning and re-assembling everything.

I would also recommend if it has never been done before to also replace the bellows assembly and all O-rings. It's not much more work and the bellows can dry out and crack over time.

I'd say mine was gross but not too messy. Just plan on a lot of shop towels and a box of rubber gloves.
 
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