MLU FORUM  

Go Back   MLU FORUM > MILITARY VEHICLES > The Restoration Forum

Notices

Reply
 
Thread Tools Display Modes
  #1  
Old 01-10-17, 09:48
Harlé Sylvain's Avatar
Harlé Sylvain Harlé Sylvain is offline
Registered User
 
Join Date: Aug 2015
Location: FRANCE
Posts: 254
Default ford cmp gearbox boom

Hello
What about this gearbox boom , is it twisted or is that original?
I am asking that because the engine in the truck was not original and was monted higher than the original.

Thank you
Sylvain
Attached Thumbnails
P1030308.JPG   P1030309.JPG  
Reply With Quote
  #2  
Old 01-10-17, 14:04
Tony Smith's Avatar
Tony Smith Tony Smith is offline
No1, Mk 2** (I'm back!)
 
Join Date: Feb 2003
Location: Lithgow, NSW, Australia
Posts: 5,042
Default

Yes, it is twisted. The top face of the crossmember should be flat all the way across, the front face perfectly vertical.
__________________
You can help Keep Mapleleafup Up! See Here how you can help, and why you should!
Reply With Quote
  #3  
Old 01-10-17, 18:22
Harlé Sylvain's Avatar
Harlé Sylvain Harlé Sylvain is offline
Registered User
 
Join Date: Aug 2015
Location: FRANCE
Posts: 254
Default

hello tony :
Thank you, If this crossmember is really flat , I will have a few more hours work!!

regards
Sylvain
Reply With Quote
  #4  
Old 01-10-17, 19:54
T Creighton T Creighton is offline
Registered User
 
Join Date: Nov 2005
Location: Katikati New Zealand
Posts: 167
Default

Quote:
Originally Posted by Harlé Sylvain View Post
hello tony :
Thank you, If this crossmember is really flat , I will have a few more hours work!!
As Tony said it should be straight both ways
Good luck with your extra work. It shouldn't be too difficult but not much room to work in there.
Being still riveted in the chassis should hold it firm while you do the heating and hammering.
Cheers,
Terry
Attached Thumbnails
IMG_0138 (Medium).JPG  
__________________
Terry
F30 13 Cab CMP
Morris Commercial C8
Reply With Quote
  #5  
Old 01-10-17, 20:07
Harlé Sylvain's Avatar
Harlé Sylvain Harlé Sylvain is offline
Registered User
 
Join Date: Aug 2015
Location: FRANCE
Posts: 254
Default

Yes ,thank you!
I will try to push on it with a jack , and head it with a acetylène torch.

cheers
Sylvain
Reply With Quote
  #6  
Old 02-11-17, 21:08
Harlé Sylvain's Avatar
Harlé Sylvain Harlé Sylvain is offline
Registered User
 
Join Date: Aug 2015
Location: FRANCE
Posts: 254
Default

Hello
I hammer my crossmember, it is perfectly flat and repainted, but I found this picture on witch the crossmember looks also twisted like my was.

I hope i dont make a mistake!

What are you thinking about?

Cheers
Sylvain
Attached Images
 
Reply With Quote
  #7  
Old 02-11-17, 21:53
Jacques Reed Jacques Reed is online now
VMVC
 
Join Date: Jul 2012
Location: Victoria Australia
Posts: 858
Default Ford CMP Transmission crossmember

Quote:
Originally Posted by Harlé Sylvain View Post
Hello
I hammer my crossmember, it is perfectly flat and repainted, but I found this picture on witch the crossmember looks also twisted like my was.

I hope i dont make a mistake!

What are you thinking about?

Cheers
Sylvain
Hello Sylvain,

No Mistake made! If it is flat and square in all directions as Tony and Terry said, it is correct.

See attached photo of my F15-A crossmember viewed from directly above it with transmission attached as a confirmation you didn't make a mistake.

Cheers,
Attached Thumbnails
IMG_1909.JPG  
__________________
F15-A 1942 Battery Staff

Jacques Reed
Reply With Quote
  #8  
Old 02-11-17, 22:01
Harlé Sylvain's Avatar
Harlé Sylvain Harlé Sylvain is offline
Registered User
 
Join Date: Aug 2015
Location: FRANCE
Posts: 254
Default

Whaaa!

Many many thanks Jacques !! I will have a good night

My chassis is already primed and painted ,it would be terrible to remake this job.!



Cheers from Normandy
Sylvain
Reply With Quote
  #9  
Old 02-11-17, 23:05
Phil Waterman Phil Waterman is offline
Moderator
 
Join Date: Feb 2003
Location: Temple, New Hampshire, USA
Posts: 3,927
Default Wonder if this from trying to pull the engine

Hi

Wonder if this is from someone trying to the engine without unbolting the transmission. Probably by some Chevy mechanic who is used to just taking out the drive shaft unbolting the engine mounts and pulling the engine and transmission as a unit.

Cheers Phil
__________________
Phil Waterman
`41 C60L Pattern 12
`42 C60S Radio Pattern 13
`45 HUP
http://canadianmilitarypattern.com/
New e-mail Philip@canadianmilitarypattern.com
Reply With Quote
  #10  
Old 02-11-17, 23:29
Harlé Sylvain's Avatar
Harlé Sylvain Harlé Sylvain is offline
Registered User
 
Join Date: Aug 2015
Location: FRANCE
Posts: 254
Default

In my truck there was a french flathead but very bad mounted with the french stock water pumps , there are higher than the canadian one , so I thouth that that was the reason why they had to lift the engine hight and twist the crossmember.
Reply With Quote
  #11  
Old 03-11-17, 00:12
Jacques Reed Jacques Reed is online now
VMVC
 
Join Date: Jul 2012
Location: Victoria Australia
Posts: 858
Default

Quote:
Originally Posted by Harlé Sylvain View Post
In my truck there was a french flathead but very bad mounted with the french stock water pumps , there are higher than the canadian one , so I thouth that that was the reason why they had to lift the engine hight and twist the crossmember.
That makes some sense. Perhaps another case of "bush engineering" to make do with the available components. May also explain why you have seen the same modification on another truck. Never saw it here but there are not many French Flatheads in Australia! I would think the rubber insulator as part of the rear transmission mount would tear loose from the steel part if it was left attached while trying to remove the engine and transmission as a unit.
Still the rubber is well attached (vulcanized?) and it may still be possible to bend that crossmember via the rear transmission mount. It's all about mechanical advantage.

I cannot count the number of times I have seen modifications to these vehicles in order to keep them going or use them for another purpose.

Perhaps there is a thread there: "Bush engineering of CMP Trucks"
It might become the longest ongoing thread!

Cheers,
__________________
F15-A 1942 Battery Staff

Jacques Reed
Reply With Quote
  #12  
Old 20-12-17, 19:13
Harlé Sylvain's Avatar
Harlé Sylvain Harlé Sylvain is offline
Registered User
 
Join Date: Aug 2015
Location: FRANCE
Posts: 254
Default

Hello
I install my engine this week end , and what a bad surprise, impossible to bolt the gearbox, (the motors mounts an waterpumps are original).

I had to "retwist" the boom as on the begining. Now the engine is on is right place, so the conclusion is that there must be two types of boom, Maybe cab 12 and 13? Or long an short wheel base.....?


I will know for the next truck......

Cheers
Reply With Quote
  #13  
Old 20-12-17, 22:00
Jacques Reed Jacques Reed is online now
VMVC
 
Join Date: Jul 2012
Location: Victoria Australia
Posts: 858
Default Twisted boom transmission mount

Hello Harle,

So sorry to hear about your twist having to be re-done to the transmission boom. There is enough work to do in a restoration without re-doing things.

I am completely puzzled why it is required, but if it works I guess that answers it. I, and others, just have never seen that before.

Just curious however, it would seem the engine would now sit higher at the front mounts with the boom twisted. If the water pumps are original style could the front engine mounts have been modified and therefore raised the engine from original height?

My previous photo shows a glimpse of the front engine mounts which may be of some help.

Cheers,
__________________
F15-A 1942 Battery Staff

Jacques Reed
Reply With Quote
  #14  
Old 20-12-17, 22:15
Jacques Reed Jacques Reed is online now
VMVC
 
Join Date: Jul 2012
Location: Victoria Australia
Posts: 858
Default Ford CMP Front engine mounts

Hello Harle,

Here are a couple of close ups of the front engine mounts which are better than the previous photo.

Cheers,
Attached Thumbnails
IMG_0183.JPG   IMG_0184.JPG  
__________________
F15-A 1942 Battery Staff

Jacques Reed
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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Ford V8 Engine Color? Ford Gearbox Color? macca004 The Restoration Forum 42 23-08-21 23:16
Re: Big Boom Thread Geoff Winnington-Ball (RIP) The Armour Forum 0 17-09-08 03:23
Chevy Army Boom truck doesn't run!!!! NORTH-SHORE(CANADA) For Sale Or Wanted 2 31-05-07 13:35
Ford gearbox Tim Berry The Softskin Forum 2 10-04-05 18:29
How to make a dewat Bofors go boom for effect! Rob Fast The Sergeants' Mess 2 27-05-04 05:23


All times are GMT +2. The time now is 22:53.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright © Maple Leaf Up, 2003-2016