RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Newmar Owner's Forum
Click Here to Login

Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 12-25-2010, 09:54 AM   #1
Junior Member
 
dodger34's Avatar
 
Join Date: Mar 2010
Posts: 8
Unhappy Granning RT500-F53 pump problem

Good morning!
Ref:Granning RT500-F53 tag axle suspension.
I have a 1995 MA3757 MountainAire Gasser (sorry, I figured the problem may be universal for a DP as well)
I have lurked enough and have done a fair amount of searching of the forums about the problem I am having. The air suspension pump runs full time of late with the controls in "on" and "inflate" positions. (No gauge at the driver controls) On a side note, I found what appears to be a tire type valve stem on the back wall of the basement compartment near the air pump. Is that for reading pressures on the air tank?. I have done a very basic inspection (darn tight for an old man) and can not find an air leak. Has anyone had the same general problem and if so do you have any solutions? I am about two weeks from traveling and do not want to damage the unit. I live in a cold area so I am not discounting that it could be ice.
Thanks for any help,
dodger
__________________

dodger34 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 12-25-2010, 06:34 PM   #2
Senior Member
 
GaryKD's Avatar
 
Newmar Owners Club
Join Date: Jul 2006
Location: Wellington, Florida
Posts: 13,311
Hi dodger34,
Welcome to iRV2. If the compressor is running all the time there must be a leak or the method of telling the compressor to stop is malfunctioning. Very cold weather can make unusual things happen. It may be that there is some cold weather binding of valves or switches. With the compressor running, I know I could not hear a leak. There could be a ride height valve stuck or worn and leaking.

The compressor must stop or it would inflate the bags a whole lot more than they should be inflated. Is the coach coming up to ride height? That would say the compressor is working (not just running).

If you are getting to ride height, for me, I'd wait until you get to warm weather. If the coach is not coming to ride height consider having a tech correct the problem before traveling.
__________________

__________________
Gary
2005 Newmar KSDP 3910 + GMC ENVOY XUV 37K lbs Moving Down The Road
The Avatar Is Many Times Around The USA
Nobody Knows Your Coach Like Somebody Who Owns One Just Like Yours
GaryKD is offline   Reply With Quote
Old 12-26-2010, 07:19 AM   #3
Member
 
53panhead's Avatar
 
Join Date: Dec 2010
Posts: 56
My Mountain Aire has two switches, one for inflate/deflate, one for power to the compressor. If you turn off the power switch, the compressor should stop running. There is a relay mounted at the compressor that is controlled by the power switch. If you turn off the power switch and the coach settles down, then you have an air leak somewhere.
The tire stem is the way to check air pressure.
Good Luck.
53panhead is offline   Reply With Quote
Old 12-26-2010, 10:10 AM   #4
Junior Member
 
dodger34's Avatar
 
Join Date: Mar 2010
Posts: 8
Thanks for the info!

Thank you for the responses.

GaryKD:Yes, I do get inflation of the bags and you are most likely right about not being able to hear air escaping. It is about 14 F. this AM so I will allow it to get a little warmer before I climb under.

53Panhead: My controls are as you identified. Also, the bags do settle after a while. I appreciate your identifying the tire stem as that will allow me to check if the compressor is over pressurizing or just not keeping up.

If anyone has had a like problem I would be interested in the specifics and the solutions.
Thanks again,
Dodger34
dodger34 is offline   Reply With Quote
Old 12-27-2010, 01:10 PM   #5
Junior Member
 
dodger34's Avatar
 
Join Date: Mar 2010
Posts: 8
Air tank heated "Spitter valve" leak

Good afternoon,
Appears to be several areas of leakage at the spitter valve designed to remove moisture from the air tank. Has anyone replaced the valve? According to a parts list the part number should be #5442 Valve-Spitter (heated).
I believe there are three possible solutions, find a rebuild kit for the valve, buy a complete replacement, or remove the spitter valve and put a petcock in place of the valve. Any recommendations?
Thanks,
Dodger
dodger34 is offline   Reply With Quote
Old 12-27-2010, 01:16 PM   #6
a k
Registered User
 
Newmar Owners Club
Join Date: Jun 2009
Posts: 1,142
You sure it isn't a Meritor valve?
a k is offline   Reply With Quote
Old 12-27-2010, 03:31 PM   #7
Junior Member
 
dodger34's Avatar
 
Join Date: Mar 2010
Posts: 8
Spitter valve

AK,
I do not believe it is a meritor valve just from looking on line but the Meritor 704916-01 might be a suitable substitute if I have problems with the existing style. Thanks for the suggestion! I believe I will try a manual valve with a pull line and hope I can find a rebuild kit for the original unit.
Thanks again,
Dodger
dodger34 is offline   Reply With Quote
Old 12-27-2010, 03:37 PM   #8
a k
Registered User
 
Newmar Owners Club
Join Date: Jun 2009
Posts: 1,142
The air valve only purges only when the compresor cycles off. You should be able to get some sort of numbers off the water seperator valve. I think if you call Newmar they could tell you which one was used.
a k is offline   Reply With Quote
Old 12-29-2010, 12:32 PM   #9
Junior Member
 
dodger34's Avatar
 
Join Date: Mar 2010
Posts: 8
Stopped the leak

It turns out the auto moisture removal valve is a Haldex Midland.
I purchased a manual spitter valve from an auto parts store about $8. I removed the old valve and installed the new one. The compressor pumped up and shut off! As of about 36 hours the tank is holding at about 50 lbs. I will try to buy a rebuild kit for the old valve, recondition it and reinstall. The manual valve has a lanyard so it can be operated from outside. Thanks to all for your help.
Dodger
__________________

dodger34 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
Should I replace my f53 fuel pump as preventive maintenance Wanabee FTer Ford Motorhome Chassis Forum 8 10-25-2010 03:27 PM
Water pump problem monarchman53 Winnebago Industries Owner's Forum 4 07-05-2010 07:17 AM
Water Pump Problem - 2006 Challenger jhalbert Damon 8 06-10-2008 01:43 PM
Water Pump Problem BobD MH-General Discussions & Problems 4 06-04-2008 05:01 PM
Engine Fuel Transfer/Lift Pump Failure Question jetar Alpine Coach Owner's Forum 7 01-13-2007 08:35 AM

» Featured Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 04:29 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.