Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-30-2016, 03:17 AM   #1
4 Rivet Member
 
Moon , Moon
Join Date: Jan 2016
Posts: 343
Black tank pump leaks

Hello Interstaters!


There is a pump underneath, on the left side of our van. Once we open the black tank valve, black fluid goes from the tank to that pump by a pipe approximately 3 inch in diameter. I have a small leak from the place where that pipe connects to the motor pump (it was just my visual inspection).

What me to look first, and is there some clamp or anything that I am able to tight or replace myself before I go to a service shop?

Thank you everyone responded!
__________________

__________________
Mr. B is offline   Reply With Quote
Old 06-30-2016, 07:44 AM   #2
Rivet Master
 
73shark's Avatar
 
2011 Interstate Coach
Overland Park , Kansas
Join Date: Aug 2011
Posts: 2,595
I'm on Anna Maria Island this week so can't come to you but when I dump my tanks this morning, will look to see what might be the cause. I suspect either a loose clamp or screw or something has cracked it like hitting a "gator" like I had the misfortune to do on the way down. Fortunately the only damage seems to be some black streaks down the side and it loosened the exhaust hanger at the end of the tail pipe. First time I've ever seen the birth of a "gator" on the hiway. Semi was about 150 yds in front of me and there was a loud bang when the tread came off. Fortunately it came to rest on the right edge on my lane but since there were vehicles on both sides, I could just edge over to the left of my lane and caught part of it down the right side and both tires hit it. Very jarring.

If one of those goes under the van, then there's no telling how much damage it could wreak.
__________________

__________________
Glass half full or half empty to an engineer is the glass is twice as big as it needs to be.

PM me for sale info on my 2011. SOLD!
73shark is offline   Reply With Quote
Old 06-30-2016, 07:46 AM   #3
Rivet Master
 
UKDUDE's Avatar
 
2014 Interstate Ext. Coach
Sedona , Arizona
Join Date: Jul 2008
Posts: 948
Hello Mr. B, the Interstate Parts Book has a pretty good diagram showing how the waste plumbing is laid out, and it looks like it includes clamps which presumably you can tighten. But dump the tanks first and flush out the black tank before you start; otherwise it's very nasty!
The book is here:
https://www.airstream.com/wp-content...Parts-Book.pdf
Look on page IV-18 for the diagram.


Sent from my iPad using Airstream Forums
__________________
UKDUDE is offline   Reply With Quote
Old 06-30-2016, 08:48 AM   #4
4 Rivet Member
 
2011 Interstate Coach
Muskogee , Oklahoma
Join Date: Mar 2011
Posts: 393
There are a couple of places it could leak. The most likely is the connection between the 3" black pipe to the macerator. This pipe is not smooth on the inside, but rather has ribs, and it makes it very hard to make a tight connection to the macerator. Not only do you have to tighten the clamp, but it has to be in just the right position not to leak. I replaced it with Kanaflex 300 EPDM, which has a smooth interior, and no more leaks.

The second suspect is the macerator itself. If it has been exposed to freezing temperatures after use without draining the hose, it can be damaged. This is true even if you tried using antifreeze, if the temperatures get very cold. This is because there is at least a gallon or more of liquid that constantly remains in the hose to to tank's valves, since the pump is at the same level, and you can't pump liquid with half air and half liquid.

I am on my third pump. The first was damaged by freezing, and the second was damaged when one of the four bolts snapped off that held it together (I'm not sure what caused that). Both symptoms were leaks coming from the pump.

If you get underneath and take a look, you should be able to see where the leak is coming from. It's not that hard to fix, but stand back when you loosen the clamps, or you will get a face full of liquid that won't be very pleasant.
__________________
2011 Interstate WD/Lounge
gmillerok1 is offline   Reply With Quote
Old 06-30-2016, 04:48 PM   #5
4 Rivet Member
 
Moon , Moon
Join Date: Jan 2016
Posts: 343
Quote:
Originally Posted by 73shark View Post
I'm on Anna Maria Island this week so can't come to you but when I dump my tanks this morning, will look to see what might be the cause. I suspect either a loose clamp or screw or something has cracked it like hitting a "gator" like I had the misfortune to do on the way down. Fortunately the only damage seems to be some black streaks down the side and it loosened the exhaust hanger at the end of the tail pipe. First time I've ever seen the birth of a "gator" on the hiway. Semi was about 150 yds in front of me and there was a loud bang when the tread came off. Fortunately it came to rest on the right edge on my lane but since there were vehicles on both sides, I could just edge over to the left of my lane and caught part of it down the right side and both tires hit it. Very jarring.

If one of those goes under the van, then there's no telling how much damage it could wreak.
Anna Maria in Bradenton? It's hot today )))
Be careful with the gators!
__________________
Mr. B is offline   Reply With Quote
Old 06-30-2016, 04:49 PM   #6
4 Rivet Member
 
Moon , Moon
Join Date: Jan 2016
Posts: 343
Quote:
Originally Posted by UKDUDE View Post
Hello Mr. B, the Interstate Parts Book has a pretty good diagram showing how the waste plumbing is laid out, and it looks like it includes clamps which presumably you can tighten. But dump the tanks first and flush out the black tank before you start; otherwise it's very nasty!
The book is here:
https://www.airstream.com/wp-content...Parts-Book.pdf
Look on page IV-18 for the diagram.


Sent from my iPad using Airstream Forums
ABSOLUTELY valuable information!
__________________
Mr. B is offline   Reply With Quote
Old 06-30-2016, 04:56 PM   #7
4 Rivet Member
 
Moon , Moon
Join Date: Jan 2016
Posts: 343
Quote:
Originally Posted by gmillerok1 View Post
There are a couple of places it could leak. The most likely is the connection between the 3" black pipe to the macerator. This pipe is not smooth on the inside, but rather has ribs, and it makes it very hard to make a tight connection to the macerator. Not only do you have to tighten the clamp, but it has to be in just the right position not to leak. I replaced it with Kanaflex 300 EPDM, which has a smooth interior, and no more leaks.

The second suspect is the macerator itself. If it has been exposed to freezing temperatures after use without draining the hose, it can be damaged. This is true even if you tried using antifreeze, if the temperatures get very cold. This is because there is at least a gallon or more of liquid that constantly remains in the hose to to tank's valves, since the pump is at the same level, and you can't pump liquid with half air and half liquid.

I am on my third pump. The first was damaged by freezing, and the second was damaged when one of the four bolts snapped off that held it together (I'm not sure what caused that). Both symptoms were leaks coming from the pump.

If you get underneath and take a look, you should be able to see where the leak is coming from. It's not that hard to fix, but stand back when you loosen the clamps, or you will get a face full of liquid that won't be very pleasant.
I looked again today, and the clamp which connects pipe to the pump is okay, but leaking is going from under the macerator. I would like to remove the macer.pump to look on it. If you are already on your third motor, by now you are able to do it with the closed eyes ))). If it's not hard for you to briefly explain what me to start from?
__________________
Mr. B is offline   Reply With Quote
Old 06-30-2016, 08:09 PM   #8
4 Rivet Member
 
2011 Interstate Coach
Muskogee , Oklahoma
Join Date: Mar 2011
Posts: 393
That, indeed, sounds like a leaky pump. You can buy a kit to repair it, but it costs about half as much as a new pump, and it didn't look very easy to do, so I just bought a new one.

Here goes on the removal and replacement:

If removing and replacing, you will need to cut the two wires from the motor that go into a harness. You will have to splice back into these wires if you replace the pump.

Then, loosen the clamp that holds the 3" pipe to the pump. It will start to leak, but will only really get going when you push it off the pump. About a gallon or two of fairly disgusting liquid will pour out, so be ready. You can do the next step, and it may be easier then to remove it form the hose after the pump is loose. If you can, I'd try to remove it now and get rid of the liquid in the pipe.

The pump itself is held on with four bolts on the motor on each corner that are attached to threaded studs welded to the bottom of the bracket. There are also four rubber-type washers under the bolts. To remove, you simply take wrench and remove the bolts, pull up on the pump from the studs and set it aside.

To replace, just reverse the steps.

Good luck!
__________________
2011 Interstate WD/Lounge
gmillerok1 is offline   Reply With Quote
Old 06-30-2016, 09:21 PM   #9
Rivet Master
 
73shark's Avatar
 
2011 Interstate Coach
Overland Park , Kansas
Join Date: Aug 2011
Posts: 2,595
Quote:
Originally Posted by Mr. B View Post
Anna Maria in Bradenton? It's hot today )))
Be careful with the gators!
Not bad, about 90*. Probably warmer where you are. No gators. Just the ones on the road from the trucks.
__________________
Glass half full or half empty to an engineer is the glass is twice as big as it needs to be.

PM me for sale info on my 2011. SOLD!
73shark is offline   Reply With Quote
Old 07-01-2016, 12:17 AM   #10
4 Rivet Member
 
Moon , Moon
Join Date: Jan 2016
Posts: 343
Gmillerok, thanks a lot, it sounds very good so I will do it. But I have to buy a new pump before testing the black fluid )))
Which pump fits there, and where you bought it?

Marc, enjoy your stay in my Florida! )
__________________
Mr. B is offline   Reply With Quote
Old 07-01-2016, 07:24 AM   #11
4 Rivet Member
 
2011 Interstate Coach
Muskogee , Oklahoma
Join Date: Mar 2011
Posts: 393
Amazon:

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

I forgot, you also have to loosen the clamp that hold the smaller 1.25" hose that goes to the reel and pull the hose off. Be sure to check it's not leaking from there as well (confirm the clamp is tight). It's was very difficult to remove and replace that hose on the outlet on the pump, but it will fit back on.
__________________
2011 Interstate WD/Lounge
gmillerok1 is offline   Reply With Quote
Old 07-01-2016, 01:06 PM   #12
4 Rivet Member
 
Moon , Moon
Join Date: Jan 2016
Posts: 343
Got it. Thank you!
Will post pictures once I start to play yammi )))
__________________
Mr. B is offline   Reply With Quote
Old 07-04-2016, 06:19 PM   #13
4 Rivet Member
 
Moon , Moon
Join Date: Jan 2016
Posts: 343
The REPORT of playing a mechanic )))

I am sorry I cannot fulfill more than one photopicture in a single post, therefore will post several times in a row.

At first, I bought 16 ton Rhino Rumps in a local parts store, and few jack stands, for lifting and supporting the heavy van.
Attached Thumbnails
Click image for larger version

Name:	image.jpeg
Views:	39
Size:	286.7 KB
ID:	265960  
__________________
Mr. B is offline   Reply With Quote
Old 07-04-2016, 06:20 PM   #14
4 Rivet Member
 
Moon , Moon
Join Date: Jan 2016
Posts: 343
Rumps accommodate 8 inches lifting so I was able to get underneath.
Attached Thumbnails
Click image for larger version

Name:	image.jpeg
Views:	39
Size:	340.0 KB
ID:	265961  
__________________

__________________
Mr. B is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Leaks, leaks, and more leaks da_lizard Leaks - Weatherstrips, Gaskets, Caulks & Sealants 15 04-11-2016 11:36 AM
LEAKS LEAKS more LEAKS in ATL parzam21 General Repair Forum 17 12-27-2015 02:46 PM
Leaks, Leaks and more leaks Jim in Pima Leaks - Weatherstrips, Gaskets, Caulks & Sealants 5 12-12-2007 11:23 AM
Leaks, leaks, leaks jeffnjen30 Leaks - Weatherstrips, Gaskets, Caulks & Sealants 8 08-27-2007 11:03 PM
leaks leaks leaks Globie64 Leaks - Weatherstrips, Gaskets, Caulks & Sealants 10 12-31-2005 05:49 PM


Virginia Campgrounds

Reviews provided by



Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 05:52 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.