Wanderlodge Owners Group  
BuyByeBlueBird.com
Donate

Go Back   Wanderlodge Owners Group > Mechanic's Corner > BMC (Bluebird Motor Coach Unique Issues)

BMC (Bluebird Motor Coach Unique Issues) If you have a unique issue with your BMC coach and it can't be answered in one of the other forums here, then this is where you can list it.....List your BMC Parts here too.

Site Search:
Reply
 
Thread Tools
  #1  
Old 03-06-2011
Al Johnson Al Johnson is offline
Member
 
Join Date: Jan 2008
Location: Mandeville
Posts: 33
Exclamation Cummins 8.3 Auxillary Drive Support

After attending the LSB rally a couple of weeks ago, we pin pointed a leak in the auxillary drive. Everyone said it was a repair that I could do so I got home after the rally and ordered the gasket to make the repair. After about 4 - 5 hours of tinkering with it I realized it was not a repair for me to complete. So add 3 or 4 more hours and had it back together. What I did find during my tear down was two bolts that are supposed to support the auxillary drive unit were not there. The bolts that go into the engine block had fallen out during the years. One hole had a toasted dirt diver nest built in it. So everyone at the rally recommended Clyde at Sequin Diesel should be where I take my bird since he owns one. So we are now in Canyon Lake waiting for a Monday appointment. Met him on Friday so he could take a quick look. Says he is very familiar with this repair. Says it might not be the gasket but the aluminun plate and will not know till he gets bird on Monday. Sure hope it is not the plate, got 2 dogs and 1 cat that we are going to have to find a place on Monday if he has to tear down the front of the engine. If we have to do a teardown, what other items should we fix since he is in the area. My bird has 91K miles on it. If we are going to spends upwards of 2k, whats a few hundred more. I guess at the least we should have him change transmission, gear oil and antifreeze. What else? If it is the plate, all could have been avoided by 2 lost bolts. I will make sure he puts lock washers on the bolts this time. So go check your birds. You should have two bolts going to block and two bolts mounting the bracket to the auxillary drive unit.

Al & Kathy Johnson
'96 BMC 37 B75
Mandeville, Louisiana
Currently in Canyon Lake till Wednesday then headed to Alexandria for my son's state varisty weight lifting meet.
Reply With Quote
  #2  
Old 03-06-2011
Rob Robinson's Avatar
Rob Robinson Rob Robinson is offline
Forum Moderator
 
Join Date: Dec 2007
Location: Victoria
Posts: 4,384
Default

From what I've heard Al you can trust Clyde to give you good advice on what else should be 'checked', 'lubed' and 'replaced'.
__________________
Rob Robinson
Victoria, British Columbia
1999 LXi
Moderator
Reply With Quote
  #3  
Old 03-07-2011
bwinter1946's Avatar
bwinter1946 bwinter1946 is offline
Senior Member
 
Join Date: Mar 2009
Location: Madera
Posts: 4,060
Default

I would very much appreciate pictures of the missing bolt areas and wonder if this problem applies to other Cummins engines or is unique to the 8.3.

Thank you if this is possible.
__________________
Brad Winter
Madera, California
1997, 37' BMC
1999, Jeep Cherokee, Toad
1970, VW Baja Bug, Alternate Toad
Reply With Quote
  #4  
Old 03-07-2011
Al Johnson Al Johnson is offline
Member
 
Join Date: Jan 2008
Location: Mandeville
Posts: 33
Default

Rob.. Thanks for your confirmaition..

Brad.. I will take picture of the area once we get back home next week. We did not bring our camera on this trip. You have a 37' model just like mine so you for sure have it. You can't miss it since it is mounted to both the mount and block. I would assume that all cummins with auxillary drive units will have some form of support. It is worth the look just to confirm.

Al & Kathy Johnson
'96 BMC 37 BMC
Mandeville, Louisiana
Reply With Quote
  #5  
Old 03-07-2011
Robert Britton Robert Britton is offline
Senior Member
 
Join Date: Jan 2008
Location: Hollister, California
Posts: 1,908
Default

Quote:
Originally Posted by Al Johnson View Post
Rob.. Thanks for your confirmaition..

Brad.. I will take picture of the area once we get back home next week. We did not bring our camera on this trip. You have a 37' model just like mine so you for sure have it. You can't miss it since it is mounted to both the mount and block. I would assume that all cummins with auxillary drive units will have some form of support. It is worth the look just to confirm.

Al & Kathy Johnson
'96 BMC 37 BMC
Mandeville, Louisiana
Whats an "auxillary drive unit"?
__________________
Robert in Hollister, CA
Marathon XL40
Previously Owned; 04 M380, 88 PT-38, 87FC, 95 Weekender "Baby Bird"
Reply With Quote
  #6  
Old 03-07-2011
bwinter1946's Avatar
bwinter1946 bwinter1946 is offline
Senior Member
 
Join Date: Mar 2009
Location: Madera
Posts: 4,060
Default

OK, I think I know what Al is talking about here.

On the lower left side (passenger side) of my 8.3 Cummins behind the engine gearcase is the air compressor with a through drive for the hydraulic pump. The hydraulic pump is mounted to back of the compressor. Where the hydraulic pump mounts to the compressor is a support mount. There are two bolts that bolt to the hydraulic pump support and two bolts that bolt into the engine block. I just checked my bolts. All were there however, the lower bolt to the engine block was very loose. (I could loosen it by hand) The upper was not tight either. It is a 13mm shoulder bolt. I will retorque and use some thread locker on it. All this is done from below while looking up.

I would suggest all 8.3 owners check all four bolts. I have no idea if this applies to other Cummins engines.
__________________
Brad Winter
Madera, California
1997, 37' BMC
1999, Jeep Cherokee, Toad
1970, VW Baja Bug, Alternate Toad

Last edited by bwinter1946; 03-08-2011 at 09:40 PM. Reason: Corrected errors
Reply With Quote
  #7  
Old 03-08-2011
Robert Britton Robert Britton is offline
Senior Member
 
Join Date: Jan 2008
Location: Hollister, California
Posts: 1,908
Default

Just checked my coach (ISL 8.9 Cummins). It looks to be a little different than whats described in the other post but I did find two loose Bolts that mount the support bracket for the hydraulic pump. There are three 3/4" bolts that bolt the bracket to the block...two of the three were loose!

Good catch guys...thanks for the heads-up!
__________________
Robert in Hollister, CA
Marathon XL40
Previously Owned; 04 M380, 88 PT-38, 87FC, 95 Weekender "Baby Bird"
Reply With Quote
  #8  
Old 03-08-2011
bwinter1946's Avatar
bwinter1946 bwinter1946 is offline
Senior Member
 
Join Date: Mar 2009
Location: Madera
Posts: 4,060
Default

Thanks for checking yours Robert.

I retorqued my bolts and added a thread locker to keep them tight

Sounds like the M380s and maybe the LXs should check their mounts also.

Also I corrected the verbage/item descriptions in my earlier #6 post.

The problem is the air pump and hydraulic pump support mount bolts coming loose.
__________________
Brad Winter
Madera, California
1997, 37' BMC
1999, Jeep Cherokee, Toad
1970, VW Baja Bug, Alternate Toad
Reply With Quote
  #9  
Old 03-10-2011
Lee Davis's Avatar
Lee Davis Lee Davis is offline
Senior Member
 
Join Date: Feb 2008
Location: Wherever we are parked
Posts: 1,624
Default Bolts

Brad, Can you just crawl under there and see those bolts or do you have to get it jacked up? Did you support it or is there enough room when the air is let out and it is totally down to check under there?
__________________
Lee and Jacque Davis - Full Timers

Lee - 423-292-5767 or Jacque 423-262-9569
or lnjdavis@gmail.com Please call or email instead of private messages


1995 BMC 37
300 HP Cummins 6CTA 8.3 Turbocharged Diesel
Boldly Going Nowhere
http://www.bbirdmaps.com/index.cfm #117
Reply With Quote
  #10  
Old 03-10-2011
bwinter1946's Avatar
bwinter1946 bwinter1946 is offline
Senior Member
 
Join Date: Mar 2009
Location: Madera
Posts: 4,060
Default

On my coach, I just crawled underneath it. If you can fit under the body you can see it. Access is helped by the fact that the body line sweeps up for ground clearance at that spot. Mine has been sitting for a while so it is low on the air bags but it is in my shop on a nice, clean, flat, concrete floor and safety clearance was not an issue.

Your circumstance might vary and all safety warnings apply.
__________________
Brad Winter
Madera, California
1997, 37' BMC
1999, Jeep Cherokee, Toad
1970, VW Baja Bug, Alternate Toad
Reply With Quote
Reply

Bookmarks

Thread Tools

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Auxillary Pump Ned Hoopes FC (Forward Control Unique Issues) 8 03-03-2010 08:28 AM
Still in the drive... Turbokitty Tell Us Where You're At 7 12-08-2009 07:15 PM
Need Doghouse support strut sanibel FC (Forward Control Unique Issues) 9 05-23-2009 08:16 PM
Auxillary air compressor fxdwg PT and WB Parts List 3 04-16-2009 05:18 PM
Electrical parts - customer support GPSGary Electrical 3 03-21-2009 08:58 PM

Web Search:

All times are GMT -4. The time now is 03:06 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.