CMP FAT steering box

Tony B · #1 31-05-10, 15:48

I've been looking at a FAT in UK. I think the gasket at the front of the steering box has gone. Has anyone an exploded drawing of the box? I don't want to start stripping unless I can put it back together again.

NORTH-SHORE(CANADA) · #2 31-05-10, 16:07

Hi,
What is the model of the fat an year?

Tony B · #3 31-05-10, 17:19

Hello Eric, I'm afraid I don't know. The history of the vehicle is very sketchy, and she has undergone a lot of changes in her life.I'll try and post some photos to help.

Hanno Spoelstra · #4 31-05-10, 17:32

Quote:

Originally Posted by Tony B

Hello Eric, I'm afraid I don't know. The history of the vehicle is very sketchy, and she has undergone a lot of changes in her life.I'll try and post some photos to help.

Hi Tony,

That looks like the Chevrolet CGT FAT of the Royal Artillery Museum.

HTH,
Hanno

NORTH-SHORE(CANADA) · #5 31-05-10, 17:53

Quote:

Originally Posted by Tony B

Hello Eric, I'm afraid I don't know. The history of the vehicle is very sketchy, and she has undergone a lot of changes in her life.I'll try and post some photos to help.

Hi Tony ,
Sorry i can't help is a chevy and i work more on the ford side mabe the guy from the Barn boys could help you on this

Tony B · #6 31-05-10, 20:43

Hey Hanno, quite right. Aiming to get the old girl road worthy and tested.

Hanno Spoelstra · #7 31-05-10, 21:37

Tony,

You should be able to download the appropriate manuals from http://www.canadianregister.co.uk/
Parts like gaskets should still be available. Get her back on the road, please.

Hanno

Tony B · #8 31-05-10, 21:53

Hanno! You gentelman! Have a beer on me!

Hanno Spoelstra · #9 31-05-10, 21:59

Quote:

Originally Posted by Tony B

Have a beer on me!

You can buy me one during on our pub run with that FAT!

H.

cletrac (RIP) · #10 01-06-10, 02:16

They're just a basic worm and sector gearbox and there's really nothing to get you mixed when reassembling.

Phil Waterman · #11 01-06-10, 14:59

Hi Tony

There are several previous threads that have touched on the issue of steering box leaking. All three of mine have or do leak the problem seems to stem from the lubrication guide that says to use 80 or 90 Hypoid well any modern "equivalent" is just too thin and literally runs out through the threads and everywhere else.

The one steering box of mine that leaks the least has never been apart and never had the original grease like stuff cleaned out. In the previous discussions on this leak issue has suggested is a mix of grease and heavy gear oil to a mix that will just barely flow at room temperature. I plan to try this approach in the near future. Figure the kitchen blender should be just about right for mixing the grease and gear oil, might make the Dacaries taste funny though.

Cheers Phil

jim sewell · #12 02-06-10, 12:28

Hi Tony
As Phil mentioned a heavier lubricant should stop the leak which is usually past the threads of the bolts and the worm adjustment nut.

Suggest you clean it down thoroughly, remove one bolt at a time and allow the box to drain and then seal the threads with some gasket sealer or tape.
The traditional type greases were frowned upon for use in steering boxes because as they became less fluid over time the steering mechanism cut a path through the hard grease and moving parts were starved of lubricant.

Refill the steering box with a grease containing molidium ( 5% ) which is a very sticky grease and will not move away from the moving parts.

This will be an easier fix than dismantling and having to reset the steering box bearing preloads.
Regards
Jim S.

Alex van de Wetering · #13 02-06-10, 23:08

Looks like a very nice truck, although I would opt for a NWE respray.

Are those period WW2 tyres, or a post-war alternative in a slightly different size?

Alex