Go Back   The Ford Barn > General Discussion > Early V8 (1932-53)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 03-23-2020, 05:05 PM   #1
Mac VP
Senior Member
 
Mac VP's Avatar
 
Join Date: May 2010
Location: Cincinnati, OH
Posts: 1,108
Default What happens in a transmission rebuild - Part 2

LINK TO ORIGINAL POST:
https://www.fordbarn.com/forum/showthread.php?t=278347

So with each succeeding development of the 49 Merc overdrive trans rebuild, we will set it up as a fresh thread so that the comments and questions don't extend the thread page too much. This next thread will carry practically the same thread name but will be Part 2 (eventually followed by Parts 3, 4 and so on). I am not concerned with keeping to a tight schedule on bringing each fresh thread to the site, so you will have to watch for them. Thanks for the kind remarks!

Part 2 simply shows the process of cleaning the castings. They are placed in a sturdy basket and taken to a partner shop who has the industrial oven system for cleaning engine blocks and such. The castings are placed in the oven and baked at about 500 degrees for about 45 to 60 minutes depending on how many items are in the oven and how nasty they are. The gas fired oven virtually burns off any old paint, oil or grease.

When the oven cools, the parts are removed and placed in the rotisserie media blast machine. They are tied into place with wire. The machine turns the parts while the media (ie shot blast) is thrown about inside the cabinet. This process removes any residue of burnt ash, and of course, any rust that might be on the castings. There are two impellers that take the media from the reservoir and, spinning rapidly, throw the media at the revolving cage.

After this blaster unit is finished, the parts are blown off with compressed air, and then placed in a wash cabinet. Any dust or debris is rinsed off. The castings are dried. At this point, we have them painted with the usual "cast blast" gray paint at our request. We don't want the castings to turn brown which they would do fairly quickly if we didn't protect them.

When they are finished up we pick the castings up and return them to the transmission shop for the next steps.

Here is the link to Part 3:
https://www.fordbarn.com/forum/showt...28#post1866528
Attached Images
File Type: jpg Merc-ODtrans-Part2-1.jpg (371.0 KB, 217 views)
File Type: jpg Merc-ODtrans-Part2-2.jpg (212.2 KB, 205 views)
File Type: jpg Merc-ODtrans-Part2-3.jpg (255.6 KB, 201 views)
File Type: jpg Merc-ODtrans-Part2-4.jpg (221.9 KB, 190 views)
__________________
VANPELT SALES LLC
Cincinnati, Ohio
Office: 513-724-9486
www.vanpeltsales.com
www.classictransmission.com

Last edited by Mac VP; 05-08-2020 at 05:06 PM.
Mac VP is offline   Reply With Quote
Old 03-23-2020, 09:29 PM   #2
Lawrie
Senior Member
 
Lawrie's Avatar
 
Join Date: May 2010
Location: Qld, Australia
Posts: 3,442
Default Re: What happens in a transmission rebuild - Part 2

Mac ,you are fortunate to have access to such a cleaner, any engines or trans that I do in my shop are cleaned manually with wire brushes and kerosene etc ,a real messy job.
Lawrie
Lawrie is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 03-23-2020, 10:10 PM   #3
cas3
Senior Member
 
Join Date: Jan 2011
Location: sw minnesota
Posts: 2,218
Default Re: What happens in a transmission rebuild - Part 2

i have access to a shot blast cabinet like that, it shoots cast iron balls. i have used it on cases, but you run the gears and shafts thru there too?
cas3 is online now   Reply With Quote
Old 03-24-2020, 05:00 AM   #4
Mac VP
Senior Member
 
Mac VP's Avatar
 
Join Date: May 2010
Location: Cincinnati, OH
Posts: 1,108
Default Re: What happens in a transmission rebuild - Part 2

The bake and blast process is only for the exterior castings. Way back when I first began to rebuild transmissions on my own, I scraped and wire brushed them before scrubbing with soapy hot water. What a long messy job that was! Plus you never really got it all that clean, and it didn’t do much about the rusted castings.

The wonderful thing about this process (for us as a shop) is the significant saving of time. We get totally clean castings..... and I do mean totally! You know how it is with the little nooks and crannies. You could never get them properly cleaned by hand scrubbing. A great side benefit is that our sealing compounds stick very well to the clean surfaces.

As for the gears and shafts, we utilize a completely different procedure for them....that’s coming up in one of the next threads.
__________________
VANPELT SALES LLC
Cincinnati, Ohio
Office: 513-724-9486
www.vanpeltsales.com
www.classictransmission.com
Mac VP is offline   Reply With Quote
Old 03-24-2020, 05:46 AM   #5
Mart
Senior Member
 
Mart's Avatar
 
Join Date: May 2010
Location: Solihull, England.
Posts: 6,444
Default Re: What happens in a transmission rebuild - Part 2

Great stuff, Mac.
Mart is offline   Reply With Quote
Old 03-24-2020, 08:45 AM   #6
Seth Swoboda
Senior Member
 
Seth Swoboda's Avatar
 
Join Date: May 2010
Location: Southern Illinois
Posts: 2,875
Default Re: What happens in a transmission rebuild - Part 2

I'm enjoying these segments. Thanks Mac.
Seth Swoboda is offline   Reply With Quote
Old 03-24-2020, 08:52 AM   #7
RKS.PA
Senior Member
 
RKS.PA's Avatar
 
Join Date: Jun 2010
Location: Marana, AZ
Posts: 717
Default Re: What happens in a transmission rebuild - Part 2

Mac, this is like your book on steroids!!!

Thanks for taking the time to do this for us!!

Dick.
RKS.PA is offline   Reply With Quote
Old 03-24-2020, 04:11 PM   #8
kegmon
Member
 
kegmon's Avatar
 
Join Date: Jan 2013
Location: Kansas City, MO
Posts: 38
Default Re: What happens in a transmission rebuild - Part 2

This is the best thing on the internet right now...
kegmon is offline   Reply With Quote
Old 03-25-2020, 07:48 AM   #9
Tim Ayers
Senior Member
 
Join Date: May 2010
Location: NJ
Posts: 3,501
Default Re: What happens in a transmission rebuild - Part 2

Thank you for a peek behind the curtain!
Tim Ayers is offline   Reply With Quote
Old 03-25-2020, 10:05 AM   #10
Ol' Ron
Senior Member
 
Ol' Ron's Avatar
 
Join Date: May 2010
Location: Chester Vt
Posts: 7,406
Default Re: What happens in a transmission rebuild - Part 2

when I ran my shop, I sent all myBlocks ans etc out for bake cleaning. At the time it cost 65 per block, worth every sent!
Gramos
Ol' Ron 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

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 09:55 AM.