More help needed.

M

mike

New member
Dec 31, 2000
860
0
0
Hello Team GMC, I'm making progress on the interior refresh of my 1975 Royale.

The deconstruction is coming along, I have all winter but I'm in need of more direction.

I believe the fresh water tank is original to the coach, after draining the tank I noticed several items... First, during the PPI the tank was filled
to identify water leaks, no real issues related to leaks although the PPI revealed the water level gauge went as high as 3/4 even when full, perhaps
due to the sensors in the tank? I tried to unscrew the wires connected to the sensors but no luck so I popped them out so I could remove the tank.

Where can I purchase replacement sensors, if they exist? The ends appear quite corroded.

Is this a straight forward repair or do I need special instructions so I don't have a major leak down the raod... literally?

The main fresh water supply on my coach is at the left rear just behind the generator compartment, the water hose travels along the rear to the tank.
I also see in the propane tank compartment (right rear) there are two additional water connections, one larger with a hose diameter approximately
11/2"? enters the water tank at the upper corner and the other connection (smaller diameter maybe 3/8") also enters into the coach and into the water
tank at the opposite upper corner, what are these two connections for?

The inside of the water tank appears dirty, is there a cleaning solution that you recommend, say a water - vinegar mix that can be used to clean and
sanitize it?

As always I look forward to your suggestions and appreciate your help.

Stay Well,
Mike
 
> Hello Team GMC, I'm making progress on the interior refresh of my 1975 Royale.
>
> The deconstruction is coming along, I have all winter but I'm in need of more direction.
>
> I believe the fresh water tank is original to the coach, after draining the tank I noticed several items... First, during the PPI the tank was
> filled to identify water leaks, no real issues related to leaks although the PPI revealed the water level gauge went as high as 3/4 even when full,
> perhaps due to the sensors in the tank? I tried to unscrew the wires connected to the sensors but no luck so I popped them out so I could remove the
> tank.
>
> Where can I purchase replacement sensors, if they exist? The ends appear quite corroded.
>
> Is this a straight forward repair or do I need special instructions so I don't have a major leak down the raod... literally?
>
> The main fresh water supply on my coach is at the left rear just behind the generator compartment, the water hose travels along the inside rear to
> the tank. I also see in the propane tank compartment (right rear) there are two additional water connections, one larger with a hose diameter
> approximately 1 1/2"? enters the water tank at the upper corner and the other connection (smaller diameter maybe 3/8") also enters into the coach
> and into the water tank at the opposite upper corner, what are these two connections for?
>
> The inside of the water tank appears dirty, is there a cleaning solution that you recommend, say a water - vinegar mix that can be used to clean
> and sanitize it?
>
> As always I look forward to your suggestions and appreciate your help.
>
> Stay Well,
> Mike

Mike,

Warning: I don't have a Royale. Someone may choose to correct this.

JimK at Applied has the level sensors. Both are better as they are magnetically coupled and have no seal to fail and leak, but both were apparently
designed by Cinnabar and are terrible for accuracy. Mine sticks at full and I have to go beat on the tank for it to drop and read the level the one
for the black does not even detect the bottom or top third, but it does indicate half pretty well.

The water connection at the left rear (port-aft) goes directly to the pressure potable water and does not fill the tank in most coaches. You can add
a valve if it does not. The large line is in the case that you have to put water that is not supplied by pressure. This is like the open end of a
hose, and it only goes to the tank.

Vinegar will not sterilize much. Unless you take the tank out or put a service port in the top, you really can't clean out the many years of
sediment. Use swimming pool chlorine in a dilute solution or hot tub hydrogen peroxide (needs gloves and eye protection) and like it better because
you don't have to waste a day trying to get the chlorine taste out of the potable system. We do use ours for drinking water, but then we always did
on the boats too.

Matt
--
Matt & Mary Colie - Members GMCMI, GMCGL, GMCES
'73 Glacier 23 - Still Loving OE Rear Drum Brake with Applied Control Arms
Now with both true Keyless and remote entry
SE Michigan - Twixt A2 and Detroit
 
Thanks Matt, I had a look at the Applied site but didn't see the sensors, I must be using incorrect search criteria, I'll keep looking.

I now have the tank out of the coach so I can do a thorough cleaning using a method suggested.

Still not clear about the water inlet connections, I'll keep searching.

Thanks again,
Mike
 
Mike,

searching for sewer will result in some helpful hits.

--
Best regards

Peer Oliver Schmidt
PGP Key ID: 0x83E1C2EA

'76a Eleganza II, VA
 
We travel with pets. We carry bottled water to keep their systems regular. Strange water can cause upset and the results are not pleasant.
Tom, MS II
--
1975 GMC Avion
KA4CSG
 
> ...I believe the fresh water tank is original to the coach...I tried to unscrew the wires connected to the sensors but no luck so I popped them
> out so I could remove the tank.
>
> Where can I purchase replacement sensors, if they exist?...
Would either of these work?
http://appliedgmc.viaretailparts.com/10-1170
http://appliedgmc.viaretailparts.com/10-1165
--
73 23' Sequoia 4 Sale
73 23' CanyonLands Parts Unit 4 Sale
Upper Alabama
"Highest price does not guarantee highest quality."
 
Matt
He might have the sensors that are wires attached to the side of the tanks rather than the float ones.

By the way the magnetically coupled sensors are an 8700 series Liquid Level Rochester Gauge that have been around for many years.
I first bought them from Golby in Florida many years ago.
I don’t think they were designed by Cinnabar.

Jimmy wrote that he had a 75 Royale. Did Coachmen use the studs into the side of the tank as the level gauge rather than a float?

Emery Stora
77 Kingsley
Frederick, CO

>

>> Hello Team GMC, I'm making progress on the interior refresh of my 1975 Royale.
>>
>> The deconstruction is coming along, I have all winter but I'm in need of more direction.
>>
>> I believe the fresh water tank is original to the coach, after draining the tank I noticed several items... First, during the PPI the tank was
>> filled to identify water leaks, no real issues related to leaks although the PPI revealed the water level gauge went as high as 3/4 even when full,
>> perhaps due to the sensors in the tank? I tried to unscrew the wires connected to the sensors but no luck so I popped them out so I could remove the
>> tank.
>>
>> Where can I purchase replacement sensors, if they exist? The ends appear quite corroded.
>>
>> Is this a straight forward repair or do I need special instructions so I don't have a major leak down the raod... literally?
>>
>> The main fresh water supply on my coach is at the left rear just behind the generator compartment, the water hose travels along the inside rear to
>> the tank. I also see in the propane tank compartment (right rear) there are two additional water connections, one larger with a hose diameter
>> approximately 1 1/2"? enters the water tank at the upper corner and the other connection (smaller diameter maybe 3/8") also enters into the coach
>> and into the water tank at the opposite upper corner, what are these two connections for?
>>
>> The inside of the water tank appears dirty, is there a cleaning solution that you recommend, say a water - vinegar mix that can be used to clean
>> and sanitize it?
>>
>> As always I look forward to your suggestions and appreciate your help.
>>
>> Stay Well,
>> Mike
>
> Mike,
>
> Warning: I don't have a Royale. Someone may choose to correct this.
>
> JimK at Applied has the level sensors. Both are better as they are magnetically coupled and have no seal to fail and leak, but both were apparently
> designed by Cinnabar and are terrible for accuracy. Mine sticks at full and I have to go beat on the tank for it to drop and read the level the one
> for the black does not even detect the bottom or top third, but it does indicate half pretty well.
>
> The water connection at the left rear (port-aft) goes directly to the pressure potable water and does not fill the tank in most coaches. You can add
> a valve if it does not. The large line is in the case that you have to put water that is not supplied by pressure. This is like the open end of a
> hose, and it only goes to the tank.
>
> Vinegar will not sterilize much. Unless you take the tank out or put a service port in the top, you really can't clean out the many years of
> sediment. Use swimming pool chlorine in a dilute solution or hot tub hydrogen peroxide (needs gloves and eye protection) and like it better because
> you don't have to waste a day trying to get the chlorine taste out of the potable system. We do use ours for drinking water, but then we always did
> on the boats too.
>
> Matt
> --
> Matt & Mary Colie - Members GMCMI, GMCGL, GMCES
> '73 Glacier 23 - Still Loving OE Rear Drum Brake with Applied Control Arms
> Now with both true Keyless and remote entry
> SE Michigan - Twixt A2 and Detroit
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
 
> Hello Team GMC, I'm making progress on the interior refresh of my 1975 Royale.
>
> The deconstruction is coming along, I have all winter but I'm in need of more direction.
>
> I believe the fresh water tank is original to the coach, after draining the tank I noticed several items... First, during the PPI the tank was
> filled to identify water leaks, no real issues related to leaks although the PPI revealed the water level gauge went as high as 3/4 even when full,
> perhaps due to the sensors in the tank? I tried to unscrew the wires connected to the sensors but no luck so I popped them out so I could remove the
> tank.
>
> Where can I purchase replacement sensors, if they exist? The ends appear quite corroded.
>
> Is this a straight forward repair or do I need special instructions so I don't have a major leak down the raod... literally?
>
> The main fresh water supply on my coach is at the left rear just behind the generator compartment, the water hose travels along the inside rear to
> the tank. I also see in the propane tank compartment (right rear) there are two additional water connections, one larger with a hose diameter
> approximately 1 1/2"? enters the water tank at the upper corner and the other connection (smaller diameter maybe 3/8") also enters into the coach
> and into the water tank at the opposite upper corner, what are these two connections for?
>
> The inside of the water tank appears dirty, is there a cleaning solution that you recommend, say a water - vinegar mix that can be used to clean
> and sanitize it?
>
> As always I look forward to your suggestions and appreciate your help.
>
> Stay Well,
> Mike

Mike, I put 2 boat deck inspection covers on the top of the tank for easy access.

Available at boat places, amazon, and at ?. They're in diff sizes.

https://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=boat+deck+inspection+cover

--
”When we avoid the mistakes we might have made, we sometimes make the mistakes that we might have avoided.”

Adrien & Jenny Genesoto
75 Glenbrook 26-3
Yuba City,Ca. Text 530-nine-3-three-3-nine-nine-6
 
> Matt
> He might have the sensors that are wires attached to the side of the tanks rather than the float ones.
>
> By the way the magnetically coupled sensors are an 8700 series Liquid Level Rochester Gauge that have been around for many years.
> I first bought them from Golby in Florida many years ago.
> I don't think they were designed by Cinnabar.
>
> Jimmy wrote that he had a 75 Royale. Did Coachmen use the studs into the side of the tank as the level gauge rather than a float?
>
> Emery Stora
> 77 Kingsley
> Frederick, CO

Emery,

I was hoping to give Cinnabar the design credit because at lease one says Cinnabar on the dial face and both are done poorly.
I was hoping someone that knew Royale better than I would get on the thread.

Matt
--
Matt & Mary Colie - Members GMCMI, GMCGL, GMCES
'73 Glacier 23 - Still Loving OE Rear Drum Brake with Applied Control Arms
Now with both true Keyless and remote entry
SE Michigan - Twixt A2 and Detroit
 
Thank-you all for your ideas and suggestions.

I too was hoping that someone else with a Royale of the same vintage might be available to offer input. A short time ago I asked on the forum if there
were any other owners for this very reason, however, nobody replied. I did receive input from a fellow Canadian who has a 77 Royale.

Adrien, thanks for the suggestion, which one's did you install, I like this idea as an option?

A. Hamilton, thanks for your suggestion regarding the sensors, this one, http://appliedgmc.viaretailparts.com/10-1170 looks closer to what I removed
but not identical. I probably shouldn't be looking for identical as these items may have changed over the last 40 years.

My sensors were attached at the side of the tank, 8 in total, 2 side by each. A wire connects to a screw with what appears to be a black washer
followed by 2 small nuts... if I can only figure out how to create a folder on the photo archive I could then post images which would make this
process much easier.

Thanks again for the ideas, I'm still trying to figure out what the other connections are for?

Regards,
Mike
 
I answered that I had an Ex Royale....

My black and grey tanks are original, they still say 1976 on them

The level sensors are just rubber rivnuts, you can get them at the local Ace Hardware store.

rip the old ones out, don't bother trying to unscrew them, it won't happen.

LIke these

http://www.hansonrivet.com/rubber-nut-threaded-inserts.htm

Well Nuts : Hanson Rivethttp://www.hansonrivet.com/rubber-nut-threaded-inserts.htm
www.hansonrivet.com
RUBBER-NUTS are a flanged rubber bushing with a brass machine nut molded into one end. When seated in the work piece, a conventional machine screw is threaded through ...

When I say rip, I mean carefully twist and work them out so you don't break the tank.

Or cut the heads off and push them inside the tank...

I think I paid extra and got stainless, hopefully the next time the mice eat the wiring I can get them loose

________________________________
From: Gmclist on behalf of Mike
Sent: Tuesday, November 8, 2016 4:15:33 PM
To: gmclist
Subject: Re: [GMCnet] More help needed.

Thank-you all for your ideas and suggestions.

I too was hoping that someone else with a Royale of the same vintage might be available to offer input. A short time ago I asked on the forum if there
were any other owners for this very reason, however, nobody replied. I did receive input from a fellow Canadian who has a 77 Royale.

Adrien, thanks for the suggestion, which one's did you install, I like this idea as an option?

A. Hamilton, thanks for your suggestion regarding the sensors, this one, http://appliedgmc.viaretailparts.com/10-1170 looks closer to what I removed
but not identical. I probably shouldn't be looking for identical as these items may have changed over the last 40 years.

My sensors were attached at the side of the tank, 8 in total, 2 side by each. A wire connects to a screw with what appears to be a black washer
followed by 2 small nuts... if I can only figure out how to create a folder on the photo archive I could then post images which would make this
process much easier.

Thanks again for the ideas, I'm still trying to figure out what the other connections are for?

Regards,
Mike

_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
 
I think the second link is what you're looking for...

________________________________
From: Gmclist on behalf of A.
Sent: Tuesday, November 8, 2016 7:37:16 AM
To: gmclist
Subject: Re: [GMCnet] More help needed.

> ...I believe the fresh water tank is original to the coach...I tried to unscrew the wires connected to the sensors but no luck so I popped them
> out so I could remove the tank.
>
> Where can I purchase replacement sensors, if they exist?...
Would either of these work?
http://appliedgmc.viaretailparts.com/10-1170
http://appliedgmc.viaretailparts.com/10-1165
--
73 23' Sequoia 4 Sale
73 23' CanyonLands Parts Unit 4 Sale
Upper Alabama
"Highest price does not guarantee highest quality."

_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
 
Dang it, here's the link

http://appliedgmc.viaretailparts.com/10-1165

________________________________
From: Keith V
Sent: Tuesday, November 8, 2016 4:39:13 PM
To: gmclist
Subject: Re: [GMCnet] More help needed.

I think the second link is what you're looking for...

________________________________
From: Gmclist on behalf of A.
Sent: Tuesday, November 8, 2016 7:37:16 AM
To: gmclist
Subject: Re: [GMCnet] More help needed.

> ...I believe the fresh water tank is original to the coach...I tried to unscrew the wires connected to the sensors but no luck so I popped them
> out so I could remove the tank.
>
> Where can I purchase replacement sensors, if they exist?...
Would either of these work?
http://appliedgmc.viaretailparts.com/10-1170
http://appliedgmc.viaretailparts.com/10-1165
--
73 23' Sequoia 4 Sale
73 23' CanyonLands Parts Unit 4 Sale
Upper Alabama
"Highest price does not guarantee highest quality."

_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
 
Mike,
The original level sensors for the potable water and black tank are no longer available. They were a POS anyway. The level sensors from Jim K are a good replacement and I have used them in our first coach and they worked well . The 75 Avion and the 78 Buskirk Stretch use capacitance level sensors that work good too.

Jim K
http://www.appliedgmc.com/prod.itml/icOid/839
http://www.appliedgmc.com/prod.itml/icOid/838

Capacitance Level system
http://www.appliedgmc.com/prod.itml/icOid/1181

I have this one and it work well in the stretch.

JR Wright
Michigan

>
> Thank-you all for your ideas and suggestions.
>
> I too was hoping that someone else with a Royale of the same vintage might be available to offer input. A short time ago I asked on the forum if there
> were any other owners for this very reason, however, nobody replied. I did receive input from a fellow Canadian who has a 77 Royale.
>
> Adrien, thanks for the suggestion, which one's did you install, I like this idea as an option?
>
> A. Hamilton, thanks for your suggestion regarding the sensors, this one, http://appliedgmc.viaretailparts.com/10-1170 looks closer to what I removed
> but not identical. I probably shouldn't be looking for identical as these items may have changed over the last 40 years.
>
> My sensors were attached at the side of the tank, 8 in total, 2 side by each. A wire connects to a screw with what appears to be a black washer
> followed by 2 small nuts... if I can only figure out how to create a folder on the photo archive I could then post images which would make this
> process much easier.
>
> Thanks again for the ideas, I'm still trying to figure out what the other connections are for?
>
> Regards,
> Mike
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
 
> ...if I can only figure out how to create a folder on the photo archive I could then post images which would make this process much easier. ...
Use an existing folder, like "Original Details":
http://www.gmcmhphotos.com/photos/g27-original-details.html
--
73 23' Sequoia 4 Sale
73 23' CanyonLands Parts Unit 4 Sale
Upper Alabama
"Highest price does not guarantee highest quality."
 
Keith V. My mistake on the copy and paste of the URL, you are correct, this one (http://appliedgmc.viaretailparts.com/10-1165).

I have successfully removed the sensors without destroying the tank, one casualty was a broken wire. I will contact Jim regarding the sensor probes.

A Hamilto, I will get the photo thing figured out, thanks for your suggestion.

Regards,
Mike
 
Nice rig, your picture link works great. Welcome.
--
Sean and Stephanie
73 Ex-CanyonLands 26' #317 "Oliver"
Hubler 1-Ton, Quad-Bags, Rear Disc, Reaction Arms, P.Huber TBs, 3.70:1 LSD Honda 6500 inverter gen.

Colonial Travelers
 
You must log in or register to reply here.
Applied GMC
GMCMI Fall 2026 Rally

Share this page

Share this page
Top Bottom
Back