The Stovebolt Site Forums The Shop Area Driveline Please help I.D this wheel cylindar.

Hi there,
Just about got my 54 Chev truck together only have the bed and tail lights to go and she is off to be weighed for rego. Hopefully in the next few weeks.

Being so far away from suppliers it is hard to track down some parts down here in Aus.

I have a wheel cylinder with the numbers
646?(?=last digit unreadable)and 385 or 885.

Would they use the same wheel cylinder for both the front and rear wheels?

Just wondering if anyone recognises these numbers at all. If I can I.D these I can start to track down new ones through LMC Truck, Filling Station etc.

If I knew how to I would put up a photo.

Thanks
John.

Hy Dawso, could you tell us what size of truck you're asking about?

I do not know for sure, However I have always wanted to know exactly what I have here, so I have some info on the truck perhaps you might be able to tell me please.

Centre of front axle to centre of rear is: 13'4".
20" wheels all round with duals on the rear.
1 x wheel cylinder per drum.
Chasis is 8 and 3/4"deep at deepest point under cab.
5 bolts hold dust cap on rear hub.
6 bolts hold dust cap on front hub.
9 leafs on front spring set-up.
18 leafs on rear spring set-up.


Thank you

John.

Just from the dimensions and spring specs you give, you have a 6400 2 ton.

Hy Dawso, could you tell us the wheel cylinder bore sizes please, also the diameter of the brake drums?

Hi LONGBOX55
Thanks that's one big truck I have then. In my manual that makes it G.V.W of 16000 lbs? or 7 to 8 ton depending on short or long ton thereabouts? Ones U.S ton and ones U.K. ton.

I do not have a clue where the '2 ton' comes from though, how is this worked out, and where does that come from?

Does this mean the truck has a carrying capacity of 7 or 2 ton? (G.V.M)

Painfull with the questions I know, but I find all this info very very interesting.

3B, Thank you for the help I will get back to you as it was a while ago I had the wheels off and I did not take any measurements only photos of the brake system (spring, wheel cylinder, etc) with the drum off.

When I had the wheel cylinders off and gave them a clean up I am sure the front were the same size as the rear.

Thank you
John.

John, gross weight is truck 'curb weight' + load .... '2 ton' is a manufacturers 'nominal rating' that indicates it's rated to carry 2 tons

Bill

Thanks for that info Bill.

Hi there 3B
"Hy Dawso, could you tell us the wheel cylinder bore sizes please, also the diameter of the brake drums?"

Dia of brake drums are 3'3 1/2"
Cylinder bore is 0.866 of an inch. (22mm)

Thanks
John.

Hy Dawso, are you saying that your brake drums a 13 inches in diameter and 3 1/2 inches wide? Do your wheels use five studs on the front and ten studs on the rear? I can't locate anything that uses a rear wheel cylinder that small in diameter. Those brake dimensions seem to indicate a much more modern rear axle, any idea what it may have come from?

Hi 3B,
No, my blu there, was in a hurry.
I measured the front drums and the rears are the same, that measurement was: 1 x foot and 3 and a half inches in diameter.

Front wheels have 5 studs and 10 on the rear.

Both front and rear wheel cylinders are the same. I measured one of the pistons from the cylinder I had laying around.

I looked at a 46-48 chev truck, same weight, before I bought this one and the diff looked very much the same.

Does this info help any?

Thanks for the help,
much appreciated.
John.

Hy Dawso, so just to clarify you're saying your brake drums are 15 1/2 inches in diameter? Are you measuring the inside diameter of the drum, where the brake shoes ride? I cannot recall any brake drums that are 15 1/2 inches inside diameter. The single rear wheel cylinder is unusual, most rear wheel brakes of that era had two wheel cylinders per wheel for the larger trucks. Pictures of what you have would be very helpful. Metric dimensions on parts of that era did not exist here in north America. The wheel cylinder you have is a lot smaller in bore than what we are used to seeing, and as I said most systems of that size of truck use two wheel cylinders per wheel and much larger in diameter.

The diameter of the drum was measured from under the truck and from behind. I may have picked up the wrong piston for the cylinder I will check.
https://plus.google.com/photos/106260083219000588032/albums/5997790739590732433

Yes, you are right, the rears have 2 cylinders. Thankfully I photograph everything usually. Guess I won't rely on my memory anymore.

Hy Dawso, ah grasshopper one picture worth thousand words! I will try and get my partner to help me post other research I have already done for others, the master cylinder information will not be correct for your truck, but I think the rest is applicable.

Re: Wheel Cylinders - replacements [Re: 1959 Viking]
3B Online
Shop Shark

Hy 59Viking, if my memory serves me correctly, your front wheel cylinders are no longer available, but we did manage to find another wheel cylinder with a different style of hose attachment that would bolt on and do the job. I wish I was better with the confusilator and could find the old post for you, but alas I'm not smart enough for these new fangled contraptions. Your rear wheel cylinders are Raybestos p/n WC18196 one left at RockAuto $16.00 and p/n WC18197 one left at RockAuto $3.26, I realize you will need two of each and I will try to cross the number at the Napa site. I suspect your rear brakes are the type with the wheel cylinder crossover line inside the drum, DO NOT THROW THOSE LINES AWAY THE NUTS ON THEM HAVE A DIFFERENT PITCH THAN STANDARD BRAKE LINE NUTS. If the lines themselves are damaged you can transfer the nuts to standard tubing and make your own crossover lines, hope that helps.

Re: Wheel Cylinders - replacements [Re: 1959 Viking]
3B Online
Shop Shark
Hy 59Viking, the Napa p/n for the rear wheel cylinders are
UP18196 $35.49
UP18197 $35.49, hope that helps.

Re: Wheel Cylinders - replacements [Re: 1959 Viking]
3B Online
Shop Shark Registered: 11-09-2005
Posts: 4181
Loc: B. C. Canada
Hy 59Viking, with the help of my partner I found the old post, hope it helps. the following are Raybestos numbers and prices are from RockAuto in U.S. dollars. A little explanation on the front wheel cylinders, the originals are no longer available, back in 2012 fclaridge was looking for them also. I suggested that he try the p/ns I'm giving you, which he did and photo documenteted their installation. The only difference between the two wheel cylinders is the angle that the hoses attach to the wheel cylinders.
Master cylinder MC21698 $127.79
Front wheel cylinder left WC19091 $18.01
Front wheel cylinder right WC19090 $11.00
Rear wheel cylinder reverse WC18197 $27.79
Rear wheel cylinder forward WC18196 only one left @ $3.79
Front brake hose BH36548 $16.53
Rear brake hose BH25664 $27.79 this is the hose for the H.D. rear axle, as they showed no stock for the standard rear axle hose p/n BH4492.
You will have to order two of each of the rear wheel cylinders, and as you can see they only have one of one of them left in stock, also you will need two front brake hoses, hope that helps.

WoW, that sure is a bit of info, thank you.

I will just go through that info. I will have to see if these places post overseas I know LMC truck/Filling Station and Chevs of the Forties do, but I'll check the places you mentioned.

Thanks
John.

Whoa,
Just done a check out at Rockauto.
The postage is far greater than the items themselves.
No, I have not purchased them as yet, will check out some other places first. But the site did give me good photos of what they looked like and thanks for that.

John.

Just wondering if anyone one who is not in the U.S can give me the name of places that ship to Australia or if anyone in the U.S/Canada would know any stores that ship to Australia.

I know Filling Station, Chevs of the Forties and L.M.C Truck do but they do not have what I am after.

Just a side note, was just outside and a guy walking by saw my truck, mentioned to me his dad has an old early forties truck he may wish to part with. He will get back to me. We will see.

Anyone?

Hy Dawso, are you asking because RockAuto and Napa do not ship to Australia?

Hi 3B,
No, Rockauto will post here, but their postage far outweighs the price of the items. I don't normally worry about the postage costs as I know the distance they have to come from and that's part and parcel of doing up a vehicle from overseas. No worries there at all.

But I have been getting parts from overseas for a while now and have had larger and heavier items sent for less.

Just after suggestions if anyone knows of places that are reasonable in their postage charges. If I cannot find cheaper postage rates, I will have to go with these guys as a last resort.