Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 

Go Back   Montana Owners Club - Keystone Montana 5th Wheel Forum > GENERAL DISCUSSIONS > General Discussions about our Montanas
Click Here to Login

Reply
 
Thread Tools Search this Thread Display Modes
 
Old 04-22-2018, 11:32 PM   #1
fonsecaangelm
New Member
 
Join Date: Apr 2018
Location: Jackson
Posts: 7
M.O.C. #21628
Smile Replace/repair grey holding tank

Hi there! We have a leak in our grey holding tank, and already patched it with ABS, but either it didn't work, or we didn't find/patch all the cracks. So....we will be opening the bottom back up and checking again, but, we are thinking we might want to replace it.

Does anyone have any tips on
1) where to find the replacement part # (is there a registry of part numbers for our year/model?)
2) once I find the part, has anyone found an owner's schematic of how components are mounted?
3) what to watch our for? who's done this???

Thanks for any information
 
fonsecaangelm is offline   Reply With Quote
Old 04-23-2018, 04:10 AM   #2
WeBeFulltime
Montana Master
 
WeBeFulltime's Avatar
 
Join Date: May 2011
Location: Hixson
Posts: 3,436
M.O.C. #11397
Would be very helpful to know the year and model of your Monty. Many members add a signature with the information included.
__________________
2018.5 Montana 3791RD


Full Timers 9/1/2010 through 1/16/2020.
WeBeFulltime is offline   Reply With Quote
Old 04-23-2018, 10:11 AM   #3
fonsecaangelm
New Member
 
Join Date: Apr 2018
Location: Jackson
Posts: 7
M.O.C. #21628
thank you! I just added our signature, but just in case!! 2005 Montana 3400RL.

yes! We bought it last summer, and in the fall discovered that the underbody vinyl (?) was dripping water. so we opened that up and discovered that the grey water tank was leaking. We found it was cracked under the drain hole... so for several weeks and searched videos/etc on how to fix it. We tried multiple things, but we THOUGHT the one that held was the black ABS cement. so after watching it for a while with no leaking we buttoned the underbody back up.

Lo and behold....3 weeks later, it was leaking again. I suspect there was another crack we didn't originally patch (but could be wrong, we will be opening it back up next week...hubby had knee surgery and has trouble climbing under there). If we find a crack higher up (we think it is, which is why it started leaking after getting fuller?) then we are thinking stop messing with it and just put a new one in. Of course ordering the correct part is as big a hassle as removing the tank!

any help is appreciated.
amf
__________________
~~~~~~~~~~~~~~~
Sam and Angel
2005 Montana 3400RL | 2016 Ram 2500
Newbies Always looking for tips
fonsecaangelm is offline   Reply With Quote
Old 04-23-2018, 10:26 AM   #4
shovelhead86
Montana Master
 
Join Date: Dec 2010
Location: Sioux Falls
Posts: 663
M.O.C. #10985
Go online and find a product named Plasti-mend. It works. After repairing support everything better.
shovelhead86 is offline   Reply With Quote
Old 04-23-2018, 10:34 AM   #5
jcurtis934
Montana Master
 
Join Date: Sep 2013
Location: Pensacola (mail forward service)
Posts: 3,198
M.O.C. #13740
Okay, have done my black tank as well as my galley grey. The repair should have been done with plastimend and with the tank out. The failure mode on my galley tank was on one of the ribs on the bottom that got worse with more grey water in it as these tanks expand quite a bit with stuff in them. I also had a major leak at the top lip where the tank top is bonded to the lower molded part of the tank. Haven't had any issues since repair. Black tank failure was my fault, leak around top seam. Tanks are only held in place by two rails under the side seams at the top. One of the rails is removeable. Remove wiring to tank, make sure as much liquid I'd out of tank, cut inlet on top of tank leaving enough pipe for a rubber no hub coupling to put back together, cut tank output from rest of output plumbing...again leaving enough room for a rubber coupling to put back together, remove the removeable metal tube under one side of the tank, and lower it out. With tank totally empty and no or little liquid in tank one can use plastimend kit to repair the issue. Tanks have a raised molded in number on them that tells size and pipes configuration of any tank. New tanks don't come with any fittings as far as I am aware of.
__________________
2012 F350 6.7 L dually, 2013 3800RE with 6 pt leveling, Sumitomo 17.5" load range h tires, Samsung 18 cu ft residential fridge, 8k Morryde I.S. with disc brakes. Full timing since 2012.
jcurtis934 is offline   Reply With Quote
Old 04-23-2018, 11:05 AM   #6
fonsecaangelm
New Member
 
Join Date: Apr 2018
Location: Jackson
Posts: 7
M.O.C. #21628
We had everything winterized last year and want to resolve this before using again this year. Hopefully it's as dry as it's going to get....been 7 months! BUT....if we are removing the tank anyway...why not replace with a new one? (other than cost, obviously. Just seems that the time will be worth it if we don't patch it correctly, don't want to work on it all summer).

thoughts? Know where to find part #s and order?
thanks in advance!!!
__________________
~~~~~~~~~~~~~~~
Sam and Angel
2005 Montana 3400RL | 2016 Ram 2500
Newbies Always looking for tips
fonsecaangelm is offline   Reply With Quote
Old 04-23-2018, 01:39 PM   #7
rohrmann
Montana Master
 
rohrmann's Avatar
 
Join Date: Oct 2012
Location: Box Elder
Posts: 4,676
M.O.C. #12947
We had a grey tank leak a couple years ago which was located in one of the ribs on the bottom. I used a Plastimend kit that has the piece of screen material. Once the repair was complete, I installed extra braces across the frame and used blocking to support both the black and grey tanks. Once the blocks were in place, I removed the braces and reinstalled the coroplast and then reinstalled the braces. I haven't done the galley tank, but we don't let it get that full before draining.
Attached Thumbnails
Click image for larger version

Name:	repaired grey tank crack.jpg
Views:	288
Size:	101.9 KB
ID:	1565   Click image for larger version

Name:	tank supports added.jpg
Views:	268
Size:	111.8 KB
ID:	1566  
__________________
Bob & Becky
2012 3402RL
2012 Chevy 2500HD D/A CC 4WD
rohrmann is offline   Reply With Quote
Old 05-13-2018, 04:54 PM   #8
Wheelhouse
Montana Fan
 
Join Date: Jun 2011
Location: Aptos
Posts: 427
M.O.C. #11462
Quote:
Originally Posted by jcurtis934 View Post
Okay, have done my black tank as well as my galley grey. The repair should have been done with plastimend and with the tank out. The failure mode on my galley tank was on one of the ribs on the bottom that got worse with more grey water in it as these tanks expand quite a bit with stuff in them. I also had a major leak at the top lip where the tank top is bonded to the lower molded part of the tank. Haven't had any issues since repair. Black tank failure was my fault, leak around top seam. Tanks are only held in place by two rails under the side seams at the top. One of the rails is removeable. Remove wiring to tank, make sure as much liquid I'd out of tank, cut inlet on top of tank leaving enough pipe for a rubber no hub coupling to put back together, cut tank output from rest of output plumbing...again leaving enough room for a rubber coupling to put back together, remove the removeable metal tube under one side of the tank, and lower it out. With tank totally empty and no or little liquid in tank one can use plastimend kit to repair the issue. Tanks have a raised molded in number on them that tells size and pipes configuration of any tank. New tanks don't come with any fittings as far as I am aware of.
I have tried the Plasti-mend and abs- cement and finally said put in a new tank. I just blew the black water so figured replace both.
The plastic-mend crack just continued after mending.
Wheelhouse is offline   Reply With Quote
Old 05-13-2018, 07:41 PM   #9
jcurtis934
Montana Master
 
Join Date: Sep 2013
Location: Pensacola (mail forward service)
Posts: 3,198
M.O.C. #13740
Who knows why your repair didn't work. Moisture in the tank really hurts the process, which is why my tanks were taken out and stood on end to drain out, then sit in the Florida sun to evaporate stuff inside. I used sandpaper to rough up my bottom split, then allied a layer of the plastimend and embedded the fiberglass screening into it, then followed that up with two more layers of plastimend. Still holding. On the top seam, I sandpaper ed the outside of the lips, forced plastimend into the seam, followed by the above sequence all the way around and things are still holding nicely. Guess you had the bad luck day on yours. Oh well, new tanks to give you long service hopefully.
__________________
2012 F350 6.7 L dually, 2013 3800RE with 6 pt leveling, Sumitomo 17.5" load range h tires, Samsung 18 cu ft residential fridge, 8k Morryde I.S. with disc brakes. Full timing since 2012.
jcurtis934 is offline   Reply With Quote
Old 05-13-2018, 07:47 PM   #10
DQDick
Site Team
 
DQDick's Avatar
 
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
Replacement tanks can be found at Trekwood.com
DQDick is offline   Reply With Quote
Old 05-13-2018, 09:55 PM   #11
Rondo
Site Team
 
Join Date: Aug 2007
Location: Omaha
Posts: 6,749
M.O.C. #7560
Whether you patch the tank or replace it put some support under them. I've heard of metal strapping with foam or rubber between the strapping and the tank or do like rohrmann did and put wooden supports under the tanks. They will hold approximately 40 gallons plus of water and that equals about 340 lbs. of weight pushing down on the bottom or sides of that tank, so some extra support is needed.
Rondo is offline   Reply With Quote
Old 05-14-2018, 08:12 AM   #12
richfaa
Montana Master
 
Join Date: Jan 2005
Location: North Ridgeville
Posts: 20,229
M.O.C. #2839
With the extended warranty it is a phone call and about 500.00 to replace the tank at a dealer 50.00 of which is on us.
richfaa is offline   Reply With Quote
Old 05-14-2018, 05:52 PM   #13
bigred715
Montana Master
 
Join Date: Dec 2005
Location: Eugene
Posts: 1,050
M.O.C. #5091
That is where a extended warranty is worth the price when you don't have a place for the do-it-yourself person. Our galley tank leaked and our dealer replaced the tank under warranty. All we had to pay was the shipping of the tank. He also added more support under tank and added venting from the tank all under the replacement cost.
bigred715 is offline   Reply With Quote
Old 05-14-2018, 06:21 PM   #14
mlh
Montana Master
 
Join Date: Oct 2004
Location: Salem
Posts: 7,528
M.O.C. #2283
If I had to remove the tank I would replace it and add much more support to it. Leaking tanks are a fairly common problem.
Lynwood
mlh is offline   Reply With Quote
Reply

Tags
grey, holding tank, leak

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
Forum Jump

» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by Montana RV, Keystone RV Company or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 04:24 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2024, vBulletin Solutions, Inc.