Tag axle adjustment - Luxury Coach Lifestyles
Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
Reply
 
Thread Tools Display Modes
 
Old 08-29-2011, 04:11 AM   #1
Hardtrigger
Member
 
Join Date: Sep 2010
Location: Boise, Idaho
Posts: 63
Default Tag axle adjustment

Good evening in Newell land, hoping someone can help me with a question about adjusting the tag axle air pressure! In the passenger side of the engine compartment is three air gauges, two up high on the forward firewall and one lower about a foot off the floor. The manuel says to keep air pressure on the tag axle to 25lbs. and I would venture to guess the bottom gauge is the tag axle gauge and that is what scares me! When the air pressure builds this gauge goes up to 110lbs and has a brass dial on the side of it which reads max on opposing edges with arrows pointing in both directions which does not make sense! If I spin this dial clockwise the air pressure does not change. When I dial it counter clockwise air pressure kepps at 110lbs. I guess I have to ask; is this the correct gauge for tag axle air pressure for 25lbs. hope not showing 110lbs? And if so how do I get this to bleed down to 25lbs as the manuel ask for? I have a 1991 42ft. and any help would be highly appreciated for I am frustrated not being able to figure this out for the manuel does not say what the three gauges are for and how to adjust air pressur to tag axle. Thank you very much Robert
__________________

Hardtrigger is offline   Reply With Quote
Old 08-29-2011, 10:39 AM   #2
rheavn
Senior Member
 
rheavn's Avatar
 
Join Date: Feb 2010
Posts: 433
Default

Robert,
There are several folks on this forum with early 90s coaches that I'm sure will be able to answer your question. My vintage coach does not have the ability to adjust air pressure on the tag axle other than raising & lowering through a switch on the dash. You might start with a call to Newell and speak with one of the service managers. (888) 3-newell
__________________

__________________
Steve
Newell
rheavn is offline   Reply With Quote
Old 08-29-2011, 12:01 PM   #3
tuga
Senior Member
 
tuga's Avatar
 
Join Date: May 2006
Location: Houma, LA
Posts: 886
Talking

I had a 1987 Newell and the air pressure on the tag was adjustable. Trouble is that was so long ago I can't remember how to do it.

Call Newell service 1-888-9NEWELL and ask for one of the service managers, they will walk you thru it.
__________________
Tuga & Karen Gaidry
1999 Newell 45 w/2 slides
Coach #512
2005 Pilot
tuga is offline   Reply With Quote
Old 08-29-2011, 01:36 PM   #4
Wally Arntzen
Senior Member
 
Join Date: Apr 2007
Location: Minnesota
Posts: 326
Default

I have an 88 and the tag air is adjustable. I have a black knob at the bottom of the guage and I don't recall if you push the the knob in or pull it out and turn it to the amount of air you want to make the adjustment. I then put it back to the neutral position and it holds. On my 88 I was told at Newell to keep my tag at 40 pounds. They probably have different preasures for newer coaches.
__________________
Wally and Phyllis
1988 Newell Coach #163
40' with tag 8V92
Wally Arntzen is offline   Reply With Quote
Old 08-29-2011, 01:37 PM   #5
fulltiming
Senior Member
 
fulltiming's Avatar
 
Join Date: Feb 2006
Location: Texas
Posts: 1,558
Default

Hardtrigger, on my 1992, the top gauge is the transmission air shift pressure gauge, the center gauge is the system pressure gauge (non-adjustable) and the lower gauge is the tag axle air. To adjust the tag axle pressure on mine you pull out on the plastic knob and rotate. Assuming the engine is running, the gauge should change with a small movement of the knob.

If you actually have 125 psi in your tag the rear of the coach would look high and the rear wheels would have very little weight on them. I would check for a stuck air gauge. Does the gauge drop to 0 a couple of minutes after you release the tag dump switch on the dash?
__________________
Michael and Georgia Day
1992 Newell 43.5' #281
8V92 DDEC-2, HT740
PT Cruiser GT with Remco Transmission Pump
https://newellowner.com/newell-photos/
fulltiming is offline   Reply With Quote
Old 08-29-2011, 11:51 PM   #6
Hardtrigger
Member
 
Join Date: Sep 2010
Location: Boise, Idaho
Posts: 63
Talking Tag axle

Thankyou very much for the replys! Fulltiming yes the tag axle looks as if it is taking on much more of the weight! The drive axle tires looks like it has much less of the weight! I will see if the brass screw on the bottom gauge will pull out so I may reduce air pressure! Im much concerned on not moving thenbus til this is corrected! Again thanks for the replys and have a great day!!!
Hardtrigger is offline   Reply With Quote
Old 08-30-2011, 03:42 PM   #7
Hardtrigger
Member
 
Join Date: Sep 2010
Location: Boise, Idaho
Posts: 63
Default I cant sem to adjust tag axle still!!

I guess I am a little disappointed to have the best built coach in the world and hardly any manuels to support the user on such a technical coach as far as I'm concern! The manuel claims the air pressure gauge is with the regulator and should be set at 25lbs. and no more or may damage the components and frame. Thats it, thats all nothing on how to adjust air pressure or which gauge out of all of them is the air gauge!! Anyhow I think the tag axle gauge is the bottom off a elbow and sits about 5 inches horizontly coming off the firewall! It has a brass nob on the side of the air line which has two curve arrows going both ways which says max both directions which counterdicts itself! The brass flat nob will not pull out nor adjust air pressure when spun! The gauge still reads 125lbs. before the cutoff kicks in! Im kinda stuck til I get this adjusted for I have no intention for the coach to move with a tag @ 125lbs. and the drive wheels barely on the pavement! Anyone please have any similiar set up! Thank you very much! Robert Oh by the way this botton gauge mimics air pressure of the 2nd gauge up high on the firewall between the upper most gauge and botton gauge I cannot adjust!
Hardtrigger is offline   Reply With Quote
Old 08-30-2011, 04:51 PM   #8
busnut
Member
 
Join Date: Feb 2006
Location: Yuma, AZ
Posts: 45
Default

Here is a case of a picture is worth a thousand words.

Our '93 has a pressure regulator with a black knob. You push it in (maybe pull out) and rotate it to change the pressure. This regulator is available anywhere you can get air tools or supporting supplies.
__________________
Gary Carter
'93 43.5' #318
busnut is offline   Reply With Quote
Old 09-04-2011, 11:29 PM   #9
Hardtrigger
Member
 
Join Date: Sep 2010
Location: Boise, Idaho
Posts: 63
Unhappy Tag axle adjustment and new air leak

Busnut thank you for your reply! This gauge I am talking about seems to reflect supply gauge in dash as far as air pressure goes though it does have the adjustment knob that turns and turns without any adjustment to the air pressure gauge! Im going down to the supply house and swapping out regulator and gauge and see what this will do! Other night I started the coach and again the air pressur built up to 125lbs and sprung a leak in a hose I believe behind the generator 5 feet back from the opening! Air pressure wont build above 70 lbs. and when I slide the generator out it really bleeds air quickly. I have no way of getting behind the generator for the clearance is too small and now have no idea on what to do! Bought this Newell month ago and just cant seem to get on top of the problems! Really nervous on the last issue for it looks as if I am going to need to pull off the generator just to have access to the air leak. Wow I say Wow Have a great day!
Hardtrigger is offline   Reply With Quote
Old 09-07-2011, 01:05 PM   #10
fulltiming
Senior Member
 
fulltiming's Avatar
 
Join Date: Feb 2006
Location: Texas
Posts: 1,558
Default

Air leaks can be a real bugger to track down and fix. That is true on any air operated coach. The pressure regulator you are talking about is somewhat different than the ones I have seen on Newells in the age range of yours. I wonder if it has been replaced. I have heard of a few cases where someone had a leaking regulator and put a screw into the orifice to stop the venting. That would result in an inability to reduce the pressure once it was increased.
__________________
Michael and Georgia Day
1992 Newell 43.5' #281
8V92 DDEC-2, HT740
PT Cruiser GT with Remco Transmission Pump
https://newellowner.com/newell-photos/
fulltiming is offline   Reply With Quote
Old 09-07-2011, 04:57 PM   #11
Jimg
New Member
 
Join Date: Mar 2010
Posts: 9
Default

Top gauge with regulator in line is the transmission modulator air supply and should be set at 60

The middle gauge show's air supply pressure it will very from 0 – 120 psi.

Bottom gauge is the tag axle regulator that should be set to 25 psi
Jimg is offline   Reply With Quote
Old 09-07-2011, 10:54 PM   #12
fulltiming
Senior Member
 
fulltiming's Avatar
 
Join Date: Feb 2006
Location: Texas
Posts: 1,558
Default

Sorry, I added gauge location info to the photo in the gallery but didn't add it here. Thanks for also adding setting information.
__________________
Michael and Georgia Day
1992 Newell 43.5' #281
8V92 DDEC-2, HT740
PT Cruiser GT with Remco Transmission Pump
https://newellowner.com/newell-photos/
fulltiming is offline   Reply With Quote
Old 09-08-2011, 03:38 AM   #13
Wally Arntzen
Senior Member
 
Join Date: Apr 2007
Location: Minnesota
Posts: 326
Default

I have an 88 and when I got it I was frustrated with air leaks as you are. A friend of mine who manages a bus repair garage and I decided to fix it all. We replaced every check valve, air switch, air guages, air motors and two air tanks (which had leaks in the welded seams) and to this day when I am parked and living in the coach, my 110 air compressor goes on approx 2 to 3 times in 24 hours. This is primarly due to the fact that I have an air operated toilet. It cost a bit of money for all of this equipment but it was well worth it to eliminate the problem. The air switches I replaced were for the generator slide, the step slide, the windsheild wipers and they were the most expensive.
In most cases you don't find cracked lines, it's just the check valves, switches, etc that get all gumed up over time and fail due to lack of use or moisture that causes the gumming up.
__________________
Wally and Phyllis
1988 Newell Coach #163
40' with tag 8V92
Wally Arntzen is offline   Reply With Quote
Old 09-08-2011, 11:53 PM   #14
Hardtrigger
Member
 
Join Date: Sep 2010
Location: Boise, Idaho
Posts: 63
Default

Fulltiming this gauge comes off the bottom center row where yours is capped off in your pic then from the gauge if is yubed over to the bottom right solenoid.Where you bottom gauge is I have nothing bit a 1/8# hole that bleeds when I hit the dump as well as the gauge will go from 125lbs. to 0 when I release tag switch! I e-mailed pic to myself but cannot figure how to move to this message so as to show the layout of mine! Thanx for everyones help! Robert
Hardtrigger is offline   Reply With Quote
Old 09-09-2011, 12:10 AM   #15
Hardtrigger
Member
 
Join Date: Sep 2010
Location: Boise, Idaho
Posts: 63
Default Hopefully pic opens

Click image for larger version

Name:	mail.jpg
Views:	142
Size:	73.5 KB
ID:	1146 hopefully this opens
Hardtrigger is offline   Reply With Quote
Old 09-09-2011, 12:13 AM   #16
Hardtrigger
Member
 
Join Date: Sep 2010
Location: Boise, Idaho
Posts: 63
Default

Nice it opened! Can you see where the gauge comes off of center bottom row solenoid then feeds solenoid to the left? Where your gauge is I only have a hole that bleeds when I dump my tag! The gauge mimics air pressure of gauge top right and suppose to adjust but doesnt! Thank you for any ideas! Im suppose to go on vacation Sunday but refuse to move until I reduce air pressure to tag axle! Thanks again
Hardtrigger is offline   Reply With Quote
Old 09-09-2011, 12:45 AM   #17
HoosierDaddy
Senior Member
 
HoosierDaddy's Avatar
 
Join Date: Mar 2006
Location: Indiana
Posts: 424
Default

Hardtrigger,
It appears to me that the air pressure regulator in your system is different than those in Michaels and my systems. Ours are like this:
http://www.grainger.com/Grainger/SPE...M16?Pid=search
Ours has a diaphragm and spring in it and are rebuildable. I do not know how yours works but I think it could be replaced very economically. It is probably letting air pressure leak by. A call to Newell will probably get the part you need.
__________________
1993 Newell 45'#316, 1976 Trans Am 455, 1967 GTO, 1953 Chevrolet 3105 (panel truck),1952 Chevrolet 3600,1969 Airstream Overlander. Always fixing something!
HoosierDaddy is offline   Reply With Quote
Old 09-09-2011, 12:57 PM   #18
fulltiming
Senior Member
 
fulltiming's Avatar
 
Join Date: Feb 2006
Location: Texas
Posts: 1,558
Default

From the photo, I don't see a way to vent the setup that has been installed other than through the tag dump. Definitely has been changed out from the original setup. I would concur with Dean, I would look at changing the out the regulator.
__________________
Michael and Georgia Day
1992 Newell 43.5' #281
8V92 DDEC-2, HT740
PT Cruiser GT with Remco Transmission Pump
https://newellowner.com/newell-photos/
fulltiming is offline   Reply With Quote
Old 09-18-2011, 04:17 PM   #19
Hardtrigger
Member
 
Join Date: Sep 2010
Location: Boise, Idaho
Posts: 63
Smile Tag axle weight

K I bought some solenoids from Newell and replaced as advised from Newell and this had no reflection on the 125lb. going to the tag axle. I then replaced the valve and regulator that was rengineered before I purchased as shown in picture and was able to regulate the air pressure perfectly. The regulator and gauge are used to adjust air pressure for paint gun and total investment equals to air solenoids fron Newell with freight $210.00. Investment from Harbor freight for regulatoe and gauge $2.25. I now am in Oregon and stopped at there scale house when closed and following weights with 60lbs. in tag axle equals steering axle is 14,205lbs. drive axle is 19,825lbs and tag axle is 8300lbs. with 60lbs. psi. in tag axle. Now I understand Newell advises 25lbs. psi in tag axle but when I reduced my tag from 60lb psi to 25lb psi my steering jumps to 14,920lbs. drive axle is 21,425lbs and tag reduces to 6200lb. My main concerns are the following with my past experience in owning a trucking firm legally I cant exceed 12,000lbs on steering and I should be able to transfer up to 10,000lb onto the tag axle off of steering with my drive axle absorbing some of this also of course. With my fuel tanks(325 gallons x 6.50lbs) and my water tank (300 gallons x 8lbs.) directly behind my steering axle I am over weight on steering with full tanks no matter what I do with my tag. So I increased my tag axle psi to 60lbs. to asorb steering weight the best I know how and with that done I still in excess of 12,000lb legal by law the best I know having 14,205lbs. Anyone else have this situation or give advise on how to lighten up steering axle with full fuel and mostly full water tanks?? As always thank you and hope I did not confuse anyone
Hardtrigger is offline   Reply With Quote
Old 09-18-2011, 04:23 PM   #20
Hardtrigger
Member
 
Join Date: Sep 2010
Location: Boise, Idaho
Posts: 63
Default

Oh and one other thing. As mentioned above adjusting weight to tag axle is not a problem but from time to time when I dump tag to make a hard turn when I switch back to on on tag to replenish the air to axle I get a different psi to reading on axle and I need to readjust air pressure to tag when I park to get back to 60psi. I would think thought I dump air for turns when reactiate switch it should go to previous settings? I mean no a major concern for I can keep readjusting the air but it would be nice to be done with it. Thanx Robert
__________________

Hardtrigger is offline   Reply With Quote
Reply

Thread Tools
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 Newell Coach Corporation or any of its affiliates. This is an independent, unofficial site.


All times are GMT. The time now is 09:56 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
×