How To: Restore a Morris or keep fit

[Mike K]

At the sandblaster today, I noticed the local RSL have their 25 pounder gun in for a refurbish - a sandblast and a paint . The gun is looking a little tatty in its faded and not so waterproof light stone finish . I'm not sure of its providence but I see it has no muzzle brake . I will take some pics if anyone needs info.

During one of my early VMVC trips we visited a CMF unit, they had a 25 pounder parked in the yard and the soldiers there noted that our club's 25 ( towed behind a F15A) was in better shape than theirs

[Mike K]

Been stripping down the rear axle . The large hub bearings are in excellent shape thank goodness. This is a solid piece of engineering. One oddity I've never seen before is: the brake shoes are a aluminium casting . The drums could do with a skim and the linings are worn thin . The hand brake mechanism on the CS8 is quite involved and I believe it will be effective .

The original copper brake pipes , I have mentioned they used only single flared ends . This is a weird idea but it must have been OK at the time.

[pauldavies]

Hi Mike and best of luck with the resto, just got my C8 road worthy and legal yesterday. Still having problems with the air/fuel mixture which I believe will lead me to another carbi as the carbi fitted seems to have a problem getting the idle and fuel mix as it should be.
Paul

[Mike K]

Originally Posted by pauldavies

Hi Mike and best of luck with the resto, just got my C8 road worthy and legal yesterday. Still having problems with the air/fuel mixture which I believe will lead me to another carbi as the carbi fitted seems to have a problem getting the idle and fuel mix as it should be.
Paul

The C8 is a unique truck in Aust. and your hard work has paid off.

Are you running the original Solex updraft carby ? I have heard that modern petrol can cause issues with older fuel systems .

[pauldavies]

Yes Mike original solex, can't get the air/fuel mix screw to do anything. I have noticed there is a lot of fuel welling at the bottom of the carbi in the choke tube?
Richard Farrant gave me some info which I tried but still no response from the air/fuel mix screw, basically nothing changes when the screw is turned either way?
Paul

[Mike K]

Originally Posted by pauldavies

Yes Mike original solex, can't get the air/fuel mix screw to do anything. I have noticed there is a lot of fuel welling at the bottom of the carbi in the choke tube?
Richard Farrant gave me some info which I tried but still no response from the air/fuel mix screw, basically nothing changes when the screw is turned either way?
Paul

I have some info on the carby , I will have a look and see what I can find out. Is the screw you are adjusting for the idle mixture only ? Or does the screw affect the fuel ratio over the whole RPM range ?

These carbies were a special design for the military , the manual refers to them as "dustproof". Maybe your fuel pump pressure is too high - have you checked it ? The pump pressure is critical. The CS8 uses a Autovac petrol sucking vacuum can on the dash, its a gravity flow down to the carby . If the fuel pressure on the needle seat is too high ( too much pump pressure in your case ) you will experience problems.

[Lynn Eades]

Paul, have you pulled the idle screw out and made sure the drillings are clear.
There will be a drilling across to the throttle plate and one vertically (I have no specific knowledge about this type of carb)
Really you probably need to go through the whole carb, checking the float level, any air correction jets, fuel pressure from the pump compared to specs etc.

[pauldavies]

Thanks guys and much food for thought, the air/fuel mixture screw and the idle screw I have been trying to get some sense out of and I have stripped the carbi a few times and found blocked jets and worn gaskets. I did install electric fuel pumps on and that may be the problem, I don't have the holding tank but the manual fuel pump I can fit to try the theory. Will let you know.
Paul