C60 cwt Signals CZMk IV

[Phil Waterman]

Hi Gordon

If you have not already read Tony's thread you might want to take a look at the posts dealing with the booster. Speaks to replacement boots.

When I bench tested my units what I was particularly looking for was leak down of the vacuum. Primary leak problem areas are the little seat for the control rod and the seal were the vacuum chamber seals to the housing.

Doing anything with this little rod has to be done carefully.(I'm looking for the manual pages on the booster to post on line.)

To get the inline check value out of the picture as a leak source use a good ball valve so you can pull the vacuum on the unit and then turn of the valve and see how long it takes for the vacuum to start dropping. When everything is perfect it will hold the vacuum over night.

When you reassemble the big piston with the leather gasket be sure to soak the seal in oil. The manual also includes adding oil to the cylinder on a regular basis. They are correct about it needing oil added with mine I include putting several ounces in each spring when I do my preseason brake check.

Another point is to use a stiff oil resistant hose to connect the booster to the manifold. Heater hose will work at first but gets soft and will actually get sucked flat. Auto air conditioning flex hose seems to work well. (10+years) It is also easy to get, either new or used.

Cheers Phil

[Gordon Yeo]

Phil

Thanks for the link to Tony's booster restoration,these units appear to very dependable. Because I never had an engine in the truck I have no idea how the booster tubing was routed and what connected it to the manifold. Could you please post several pictures of you how your truck is set up.

Gord

[Phil Waterman]

Hi Gordon

Tomorrow I'll pick up a replacement digital camera and start taking photos. (My new camera died and they are replacing it.)

Have also found the manual pages you need and will post them as well.

Cheers Phil

[Gordon Yeo]

It has been a very hasty harvest season here, too much rain and too cold. It appears some crops may be abandoned to the winter snow if the weather doesn't turn drier. That's why not much to show on the truck, work got in the way, again.

I have just about every thing cleaned up and repainted ready to instal on the frame. I thought I should get the frame in the shop and the axles mounted before we start into the real snowy weather. Using the loader and slinging the axles with chains sure makes positioning the axle and u-bolts an easy job.

Gord

[Jon Skagfeld]

Gord: When the restoration is all done, and without insulting you, do you need a qualified driver for this vehicle whilst you drive one of your other treasures at various shows?

...or maybe even a co-driver?

[Gordon Yeo]

Jon

As I recall you have come along for the ride in the 15 cwt , and that our trucks were very close in production numbers. You may have to come down to my part of the world to drive the C60 and very welcome to join in the fun.

There might be another Parade/ Celebration in Goderich in 2015, similar to the 2005 event. If it happens, come to that again and the C60 is yours for the day.



Gord

[Gordon Yeo]

Started pulling brake drums and my luck has run out. The rear drums are clean and in excellent condition. The rear brake shoes measure 5/16 " of thickness.

The front brake drums were not quite as happy an experience. I've heard people talk about the larger three ton truck ball joints and never appreciated how different they were to the 15 cwt front ends. And I still don't appreciate the difference. I had to take the pitman arms off the ball joints to get a wrench on the lower brake shoe adjusters. That doesn't seem like a good design.

The front brake shoes were drenched in oil/grease. The front oil seals have left a groove in the metal surface they mate to and that will need to be remedied, some how. The front drums were reluctant to come off and need some persuasion.

Here are a few pictures.