|
|
|
|
|
|
| Re: Date of frame change? [message #234762 is a reply to message #234756] |
Wed, 01 January 2014 19:29   |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
|
Senior Member |
|
|
| Dennis S wrote on Wed, 01 January 2014 19:17 |
Curious as to the date of this frame change to the rearmost crossmember.
SNIP
Dennis
|
My early '74 (#150) has the removable frame piece.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
|
|
|
|
|
|
| Re: [GMCnet] Date of frame change? [message #234767 is a reply to message #234759] |
Wed, 01 January 2014 20:17 |
 |
Richard RV
Messages: 631
Registered: July 2012
Location: Full-timer for 12 years, ...
Karma: -17
|
Senior Member |
|
|
| Ken Henderson wrote on Wed, 01 January 2014 18:20 |
Is the '76 a GMC-fitted coach or one by Coachmen or someone else? That's very likely the difference -- upfitters did different stuff.
|
My '77 rear bath Birchaven has two removable sections in that cross member. The central one looks OEM and there is nothing going through the opening. The other is more towards the driver's side, used for the grey tank outlet, and was apparently cut with the torch setting on "Obliterate". A fast, overly large, and nasty cut.
Richard
'77 Birchaven TZE...777;
'76 Palm Beach under construction;
‘76 Edgemont waiting its turn
|
|
|
|
|
|
| Re: Date of frame change? [message #234771 is a reply to message #234756] |
Wed, 01 January 2014 21:16 |
Dennis S
Messages: 3046
Registered: November 2005
Karma: 2
|
Senior Member |
|
|
From the initial replies, it would appear this frame change occurred in 1973 -- my 73 coach is serial number 267 -- and Matt's late 73 has the removable section.
So, hopefully other 73 owners could let us know about their frame.
Thank you all for the replies.
Dennis
Rob -- before I posted my question, your photos were some I starred at for a while trying to determine if the frame had the removable section. Funny, once you told me it did, it was easier to see.
Dennis S
73 Painted Desert 230
Memphis TN Metro
|
|
|
|
|
|
|
|
| Re: Date of frame change? [message #234881 is a reply to message #234874] |
Thu, 02 January 2014 22:03 |
Dennis S
Messages: 3046
Registered: November 2005
Karma: 2
|
Senior Member |
|
|
Bob
The original black tank discharge on my coach was a stiff, corrugated rubber hose. Later in 73 I believe the discharge was changed to a rigid pipe -- and I now wonder if the frame change came at that time to accommodate the pipe installation/maintenance.
Thanks,
Dennis
| Bob de Kruyff wrote on Thu, 02 January 2014 21:44 |
Many of those changes were driven by the assembly process in the plant.
|
Dennis S
73 Painted Desert 230
Memphis TN Metro
|
|
|
|
| Re: Date of frame change? [message #234949 is a reply to message #234756] |
Fri, 03 January 2014 14:58 |
bryant374
Messages: 563
Registered: May 2004
Location: Pleasant Valley, NY 12569
Karma: 1
|
Senior Member |
|
|
Date of frame change?
Wed, 01 January 2014 20:17
Dennis S
Curious as to the date of this frame change to the rearmost crossmember.
Here is a photo showing my 73 --
http://www.gmcmhphotos.com/photos/macerator-for-73-23-ft-coach/p38776-0202.html
And here is a link to the same crossmember on a 76 coach -- see the removable piece just below the black tank drain line - I am curious as to the date of this change.
http://www.palmbeachgmc.com/gmc/gmc_images/macerator2.jpg
Thanks for looking.
Dennis
>
>
Here are more details on frame changes from multiple sources:
Published GVWs for 26', all years:
....1973 to....Front..Rear..Total
..TZE 2400...4000..7000..10,500
late 73-74 ...4200..7000..11,200
1975-76-77..4200..7500..11,700
1978...........4500..8000..12,500
Note: While some of these changes can be supported with design changes, one was a paper upgrade by K. Stubenvoll
Parts Books frame section 11.002 (per P/N change)
X-173019, published Jan 1973 (first manual)
Several frame crossmember P/N changes indicated. (apparently from preproduction models).
X-173019, published May 1973
same P/N listings as above.
75-Z & 76-Z don't have books.
The new diagonal brace for the front frame assembly started with 5V100542 (p/n 795964).
P/N 715304 was apparently issued to retrofit earlier TZE coaches.
77-Z published Sept. 1976
Crossmembers again changed along with several bolts/nuts/washers.
78-Z published May 1979
no changes from 77-Z
Maint Manuals
X-7425
Frame material SAE 950, 1023 & 1080
Note: Can't find my reference but remember reading crossmember steel was changed to same as side rail steel ~1975.
Dealer News Fall 1974 Vol. 2 No. 1
1975 model major MH Improvements.....
#2- Increased GVW rating 11,200 to 11,700 "accomplished with design changes in the frame assembly"
Sales Literature
1973 & 1974 Side channels SAE 1023 steel
Crossmembers SAE 950
1977 & 78 Chassis
Welded with 6 X 2.50 X 1.25 channel
Glove Box "Service Parts Identifications" sticker
Option #F11403/4 on 26" & F10403/4 on 23' Base Fram Reinf Spec shows up on GB stickers from ~3V102060 to the end of 1974 model production. Dave G and I tried to figure this one out for a long time. My take, one of the frame changes, which one?
The above are all the "official" sources I am aware of.
After writing the GMC Motorhome History and trying to make sense with this kind of confusing data, is it any wonder I don't have much hair left?. Anyway, have fun trying to understand "what happened back then".
Bill Bryant
PO 1976~PB (owned 34 years)
1914 Ford (owned 70 years)
1965 Corvette (owned 39 years)
GMC Motorhome History
|
|
|
|
|
|
| Re: Date of frame change? [message #235041 is a reply to message #234963] |
Sat, 04 January 2014 09:58 |
bryant374
Messages: 563
Registered: May 2004
Location: Pleasant Valley, NY 12569
Karma: 1
|
Senior Member |
|
|
Re: Date of frame change?
Fri, 03 January 2014 19:48
SeanKidd
73 Canyonlands #317... No removable crossmember...and I thought I had the oldest!
>
>
Sorry Sean, The earliest GMC MH sold to the public still exists in North TX (0021). There are several with VINs under 100, an outstanding survivors rate for early coaches.
Bill Bryant
PO 1976~PB (owned 34 years)
1914 Ford (owned 70 years)
1965 Corvette (owned 39 years)
GMC Motorhome History
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
