Bus Conversions dot Com Bulletin Board
September 01, 2014, 12:58:33 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: If you had an E-Mag Subscription: The dog will not eat it.
   Home   Help Forum Rules Search Calendar Login Register BCM Home Page Contact BCM  
Pages: [1]   Go Down
  Print  
Author Topic: V730 Air Bag  (Read 1058 times)
travlinman
Full Member
***
Offline Offline

Posts: 216





Ignore
« on: September 08, 2012, 02:43:20 PM »

OK, so while I was checking out my new oil leak I discovered that I have an air bag that supports the v730 in my 4106. I did a little clean up on the regulator valve and gauge and it looks like it works and holds air. Any one else have one of these on their 4106 or other GM? If you do what kind of air pressure are you running? The gauge on mine reads up to 60 psi.

Cheers,

TM
Logged

Steve & Kristen Full time nomads since '06 - PD4106-674  8V71/V730
luvrbus
Hero Member
*****
Offline Offline

Posts: 12316




Ignore
« Reply #1 on: September 08, 2012, 07:58:24 PM »

TM, never saw one on a 4106 I haven't been around  the V730 in a 4106 but Bill's 4905 has a air bag under his V730 and it was set at 30 lbs

good luck
Logged

Life is short drink the good wine first
technomadia
Hero Member
*****
Offline Offline

Posts: 580


Zephyr - 1961 GM PD-4106-446


WWW

Ignore
« Reply #2 on: September 09, 2012, 07:44:00 PM »

Hi TM -

We actually just had a support arm and airbag installed under our v730 at Choo Choo Express, after having that modification suggested by several other 4106 owners we've encountered these past couple months. They engineered a system for us, and Joel at Choo Choo told us to aim to keep our particular air bag set at about 60-80 PSI (the particular one he installed is rated to 100+ PSI).

 - Cherie
Logged

Cherie and Chris / www.technomadia.com
Full-time 'Technomads' since 2006 (technology enabled nomads)
travlinman
Full Member
***
Offline Offline

Posts: 216





Ignore
« Reply #3 on: September 10, 2012, 10:04:17 AM »

Hey Cherie,

Thanks for the info on your new set up. Have you guys noticed any change in the operation of your transmission since the bag was installed? Did Joel set yours up with a way to regulate the pressure in the bag? Care to share a couple of photos?

Thanks

TM
Logged

Steve & Kristen Full time nomads since '06 - PD4106-674  8V71/V730
Kajun_Taz
Newbie
*
Offline Offline

Posts: 41


1962 GM PD-4106 "Roamin' Home"




Ignore
« Reply #4 on: September 08, 2013, 06:01:52 PM »

Does anyone have a pic of these airbags on the V730 Trans? Haven't really looked that good to see if ours has it or not, but would be of help to determin where and what I awould be looking for...  Huh
Logged

Better to be judged by 12 then carried by 6.
luvrbus
Hero Member
*****
Offline Offline

Posts: 12316




Ignore
« Reply #5 on: September 08, 2013, 07:03:05 PM »

Open the back door at the engine if you have one it will be at the rear of the transmission underneath it some are tied into the air system with a regulator some just air up with air chuck what good they do ask a GM guy

 I don't see the purpose myself the way the engine cradle is designed in a GM
Logged

Life is short drink the good wine first
Geoff
Hero Member
*****
Offline Offline

Posts: 518





Ignore
« Reply #6 on: September 08, 2013, 07:28:39 PM »

The RTS with the V730 just uses a rubber transmission mount for the transmission support.  In 75k miles of driving it seems to work just fine for me plus the original 575,000 miles that was on the bus when I bought it. 

On another note, a lot of people (shops) used to put the V730 in a 4106 with no support at all, and said it would be fine.  I never heard of one of these units having problems, but then, as was mentioned, how many miles have the owners put on their V730 4106 buses?

--Geoff
Logged

Geoff
'82 RTS AZ
sdc53
Jr. Member
**
Offline Offline

Posts: 91




Ignore
« Reply #7 on: September 09, 2013, 07:34:14 AM »

I just redid mine. Had a weld break on the forward corner of the support bar. No airbag, just a rubber mount.  I would not run without the extra support due to reports of cracked bell housings from the extra weight hanging off the engine there.

Logged

Scott
Gladstone, OR
1969 PD4107
luvrbus
Hero Member
*****
Offline Offline

Posts: 12316




Ignore
« Reply #8 on: September 09, 2013, 08:18:09 AM »

That transmission shouldn't crack a bell housing because of weight the  Allison 750 weighs 100 lbs more and are hung on the back with no extra support.

A GM guy told me it was used because of the spacer between the bell housing and transmission the long 3/8 bolts were not strong or large enough and would break making the transmission leak that is why GM came up with extra mount he said
Logged

Life is short drink the good wine first
Kajun_Taz
Newbie
*
Offline Offline

Posts: 41


1962 GM PD-4106 "Roamin' Home"




Ignore
« Reply #9 on: September 09, 2013, 01:56:17 PM »

Now I know what I'm looking for... Looks like mine doesn't have the airbag, but just a regular rubber mount...
Logged

Better to be judged by 12 then carried by 6.
Barn Owl
Roanoke, VA
Hero Member
*****
Offline Offline

Posts: 2046


PD4106-1063 "Wheezy Bus"




Ignore
« Reply #10 on: September 13, 2013, 01:11:20 AM »

My 4106 does not have one and my father's does. So far so good for mine, not sure if it is something to justify or worry about with the few miles a conversion sees. No immediate plans to install one, fence sitting at the moment while I study it.
Logged

L. Christley - W3EYE Amateur Extra
Blue Ridge Mountains, S.W. Virginia
Itís the education gained, and the ability to apply, and share, what we learn.
Have fun, be great, that way you have Great Fun!
chessie4905
Hero Member
*****
Offline Offline

Posts: 622





Ignore
« Reply #11 on: September 13, 2013, 03:16:25 AM »

   It does cut stress on other areas of engine, mounts, frame, bulkheads. Will it be ok without it?probably. There is a lot of weight hanging off the engine trying to twist off the mounting bolts because of the way it is configured. I took one off a Flxible short city bus, which I'll install on mine. It has a preset pressure regulator at 60 lbs.OR you could consider it bling.
Logged

GMC h8h 649#028
Pennsylvania-central
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines Valid XHTML 1.0! Valid CSS!