Steering Sector Shaft Pin Rotation

1941 - 1945, MB, GPW Technical questions and discussions, regarding anything related to the WWII jeep.
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dcrawford
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Steering Sector Shaft Pin Rotation

Post by dcrawford » Fri Feb 16, 2018 4:54 pm

Howdy,
I'm rebuilding my Ross steering box. The sector shaft pins are a bit worn, but otherwise, the shaft itself measures out within spec. I've seen vague references to folks pressing out their worn sector shaft pins, rotating them, then reinstalling. Given the current sad state of the available reproduction shafts, I'd like to give this a try. Has anyone done this who can give guidance, or provide a resource? I'm assuming they press out from the rear, but I'd rather have a clue before jumping in.
Thanks,
Dave
GPW 270351 6/1/45 Dallas USA 20735727 Restoration https://fordgpw.wordpress.com/
GPW 107810 4/12/43 Louisville USA 20370495
MBT 39950 9/43 USA 0240139


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artificer
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Re: Steering Sector Shaft Pin Rotation

Post by artificer » Sun Feb 18, 2018 11:05 am

Luc wrote: I would not even attempt doing that.
Very sensible advice. Don't fool with steering components that could possibly result in your & others disablement or death.
John GIBBINS Member Institute of Automotive Mechanical Engineers [Ret], ASE Master Medium/Heavy Truck & Auto Technician USA -2002 Licensed Motor Mech NSW MVIC 49593 Current 2015
TO DIAGNOSE, TROUBLESHOOT OR FAULT FIND ANY AUTO SYSTEM....
Understand how system parts interact with one another. GOOD parts can then be established & the NOT GOOD problem/s part/s isolated for repair or replacement.

dcrawford
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Re: Steering Sector Shaft Pin Rotation

Post by dcrawford » Sun Feb 18, 2018 5:49 pm

Thanks, gents. I appreciate your thoughts.
Dave
GPW 270351 6/1/45 Dallas USA 20735727 Restoration https://fordgpw.wordpress.com/
GPW 107810 4/12/43 Louisville USA 20370495
MBT 39950 9/43 USA 0240139

KiwiMB
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Re: Steering Sector Shaft Pin Rotation

Post by KiwiMB » Mon Feb 19, 2018 6:43 pm

Hi Dave,
Good advice so far. I believe the sector shaft pins are available as a separate item from Ron here on the Gee. Provided you have a good hydraulic press you can remove the old worn pins, and install replacements.

To install the new pins, Polish the shaft of the pin with VERY fine crocus cloth. Do the same to the holes in the sector shaft. Were just looking to remove any nicks and scratches here. Ensure the pins will NOT fot the holes to ensure the pins will be tight in the sector.

Place the sector shaft in your oven and set the temperature at 100 degrees C (200F) and leave for 30 minutes,

Place the pins in some dry ice (or better still liquid nitrogen) for 10 minutes. WARNING YOU MUST WEAR LEATHER GLOVES, FACE MASK and FULL BODY COVER when messing with liquid nitrogen.

This will expand the sector shaft and shrink the pins. You will literally have a couple of seconds to put the pins into the sector before temperatures normalize and the pins will grab in their holes in the sector, but the pins should simply drop into the holes.

Once everything is back at room temperature, take the sector to a good machine shop and have then swage the top of the pins to ensure they are fullt retained.

Hope this is helpful.

Cheers
Ian
Ian J
New Zealand
1941 Willys MB
1953 M38A1 Nekaf
1998 Land Rover Wolf 90


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