"BIG" truck forum C/40, C/50, C/60 and the like...

[special-K]

Not me.

Hey,about this thread and seeing if there's a demand for a medium & heavy GM truck forum. I guess it's going nowhere,huh? Like I've said before,if we took all the years and combined them,then threw in all the other GM built commercial vehicles that are not acknowledged on this site,I think we'd have a worthwhile forum. There's StepVans,El Caminos,Sedan Deliveries,Greenbriars
/Corvair90s,buses,special bodies,RVs,military,foreign GM companies,and probably others I'm over looking. This thread and it's original purpose has been lost in the back pages. What will it take to get something going? The same was true with pre-47s and we finally gave them a forum. It may not be the busiest forum but it sure earns it's keep. I'd have -plenty to post if there was such a forum. I post this stuff in the pickup forum and it disappears,but also the mind set there is largely narrowed to specific interest even in light trucks. I can see the forum I'm talking about being for all truck of working nature,even LTs.

[C10 - C90 Bill]

I too would be a frequent participant. It would be nice if we could have a trial run. The posts we have on Medium and Heavy Trucks in the regular forums does a lot of responses.

I'm a member of Heavy Trucks on another forum. As great as it is, it is All trucks and only gets Chev and GMC activity now and then. I'm also a member of another site, and as great as that one is, it doesn't have the activity on it like we do here. Especially pictures. The pictures posted on this site are outstanding.

Bill

[C10 - C90 Bill]

Tim,

Here is a picture of a GMC 6500 that someone posted on a truck site for me the other day. Although in rough shape, it is the only non-factory picture of one that I know of online:

All sizes | GMC 6500 fuel truck | Flickr - Photo...

This one is either a '64 or '65 Model.

(Click onto the Topic at the top of it to open if necessary).

Bill

[Bigasstrux]

My latest projects.

[watahyahknow]

maibe an idea for the next project to use a single wheel bed and use a couple of front fenders mounted the same way as in the front it would lower them to about equal , might look even better

[jonzcustomshop]

I picked up a nice 66 60 series, (pics when I get it home).

As far as I could tell the master cylinder is bad.. the floor mat is all stained from the fluid, and the m/c was empty.. -the truck sat for 4 years, and judging by the empty brake fluid bottles on the seat, the brakes probably wern't too hot 4 years ago either!

the master cylinder is similar to a 60-62 c 10, the truck has a hydraulic clutch.

I have a new m/c on order, and will bench bleed it before go out to the ranch to install it.

which do I bleed first? clutch or brakes?

the system has a hydrovac unit under the cab, I think it is a vacuum booster and a slave cylinder, it also looks to be connected to the power steering pump.

the rear wheels have 2 wheel cylinders each, but it looks like only one bleeder on each side.



any tips /instructions/ pionters would be a great help!

[powerdriver 1958]

Originally Posted by jonzcustomshop

I have a new m/c on order, and will bench bleed it before go out to the ranch to install it.

which do I bleed first? clutch or brakes?

It does make much difference which side you start with as long as you dont let run dry

the system has a hydrovac unit under the cab, I think it is a vacuum booster and a slave cylinder, it also looks to be connected to the power steering pump.

Haven't seen one hooked to the steering pump but haven't everything . I will start at the master and work my way back .

the rear wheels have 2 wheel cylinders each, but it looks like only one bleeder on each side.

That is normal . If you have access to a power bleeder it will make the job a whole lot easier .Shoe adjustment is the key to keeping good pedal height . The hydro vac has a limited stroke .

[jonzcustomshop]

thanks, that will help, unfortunately it is out on a farm 70 miles from town, so I am going to bleed the old fashioned way..

[powerdriver 1958]

Hydro vac should have bleeder screws on it too

[jonzcustomshop]

hmmm so in order from distance from m/c bleed, RR,LR,RF, LF, Then hydrovac?

[hugger6933]

If I remember right, Jon the slave at the bottom has a bleeder type screw on it .crack it open and get a old squirt can with brake fliud in it and pump up then the air will push back the line and come out the top of thew m/c [slave cyl] I have tried to bleed them in the conventional manner and just get no results and nothing but frustrated. I had an old [real old]chevy tec teach me that trick way long time ago. I would still bench bleed it and you may want to try the regular method to bleed . just keep that tip in mind if you run into trouble. At some point I will have to put a wheel cylinder on the right rear of my 64 c60.

[powerdriver 1958]

Master , Hydro vac ,then the 4 corners

[padresag]

furthest point from the m/c, then work the next furthest until you hit the closest bleeder. sometimes with those old hydrovacs the diaphram cracks in them and leaks, so you may not get any assist from it
ron

[jonzcustomshop]

will the system still work if the diaphram is leaky? main thing i need to do for now is get it home, which is about 30 miles of 2 lane , and then 40 miles of interstate...

[padresag]

should be just a power brake system with a bad diaphram in it. not saying that it is faulty but there is a good possibility. you may get lucky. it has been 40 years since I sold a diaphram for one of those. can't remember whether or not that they had a hole in them or not. I have a leaning that they didn't but took the same style as a maxi-pot on a truck air brake system, but were smaller than the std maxi-pot size which were 7 or 8"(which any truck shop would have
ron

[A.T. RockDriller]

Originally Posted by jonzcustomshop

hmmm so in order from distance from m/c bleed, RR,LR,RF, LF, Then hydrovac?

Jon..
I just have to pipe up on this one...
If you haven't already dealt with it, there is a pretty easy process that I use.
I've revived quite a few of the old ones, and since they, more often than not, have very old fluid in the system that has lost it's technical properties, I just "flush and bleed" at the same time.
It doesn't take two people either.
First, get a quart or two of your DOT 3 or 4 and a handfull of new bleeders if you have or can get some.....and fill the reservoir.
Get down there and start crackin bleeders....and leave them all cracked open.
Start at the close corner and pull the old bleeder out. Throw it if ya have a replacement or clean it if not.
Just let the fluid dribble for a few and replace the bleeder almost seated...look fer bubbles...if there aren't any, tighten it and move to the next one down the line...repeat and so on..When the fluid runs out with no bubbles...tighten it an move on.
Remember to keep the reservoir full....you will go through quite a bit of fluid fairly quickly.
The idea behind starting at the close corner instead of the far one is that between the proportioning valve (if ya have one) and any Tees or such you have the chance of harboring a few air bubbles that do not get out the rear if you cork it first.
Any way....I've done it this way since my old Truck Shop Foreman (Frank Barringer R.I.P.) taught me how in 1980, and without a power bleeder or an extra body....it just works great.
There are a few systems that don't like to be "gravity bled".....but these old rigs respond well to it......plus you end up with a system full of fresh fluid.

[A.T. RockDriller]

Originally Posted by C10 - C90 Bill

I too would be a frequent participant. It would be nice if we could have a trial run. The posts we have on Medium and Heavy Trucks in the regular forums does a lot of responses.

I'm a member of Heavy Trucks on another forum. As great as it is, it is All trucks and only gets Chev and GMC activity now and then. I'm also a member of another site, and as great as that one is, it doesn't have the activity on it like we do here. Especially pictures. The pictures posted on this site are outstanding.

Bill

I sure think it would be a good thing.....the 10 thru 30 series guys will also benefit from some of the info ....a lot of folks may not know how much info and components cross over between the light and Med/Hd trucks.
Here's my 4000 GMC....recent addition.
Nicer than most lt duty trucks...including my own.

[A.T. RockDriller]

And a great LCF '55 chev that I spotted on CL.
The guy wants $4500....says it'll be at the PDX swap meet later this month if he doesn't sell it first.
It looks to me like it might be a sweet old ride. Wish it was closer...(Salem), I'd go check it out. Oh well....the swap meet's only a week or so.

[tincan1966]

Originally Posted by aerotruk63

Not mine but great concept!

I am stARTING A BUILD SIMILIAR TO THIS, JUST BOUGHT A 1964 lcf AND PUTTING ON A 1970 c-30 157"wb CHASSIS

[tincan1966]

This is what I just purchased, will be bringing home in a cpl weeks

[A.T. RockDriller]

Originally Posted by tincan1966

This is what I just purchased, will be bringing home in a cpl weeks

Ya baby....

[hugger6933]

A.T. love theGMC my dad bought a 66 Dark blue 4500 for my mom to drive to haul grain from the feild in 67 new off the lot. It had power steering and brakes and I rode in it aug of 67 .I was born on 28 july 67. When he sold the truck in 87 he within 500 of what he gave for it new. It had 13,000 miles Imiss it. My bro in law gave me a 64 chev 28,000miles 292 6 2 speed rear wit ha dump that run really good.
tin can, also love the LCF or shorty I wished I had that super clean grille and grille panels[haha] to go on my 64. great trucks

[jonzcustomshop]

heres my 66 60 series.. luckily all I had to do with the brakes/clutch was replace the master cylinder, and bleed the clutch.
I have been doing some research trying to figure out how to insure it... will probably only use it a few times a year for car/truck retrival, and maybe for some dump runs or gravel if needed...
as far as I can tell the curb weight is about 9500 lbs (the only figure I could come up with from a multitude of google searches)

how do any of you that own/use these big trucks insure them?

[C10 - C90 Bill]

Originally Posted by jonzcustomshop

how do any of you that own/use these big trucks insure them?

I would just run liability. I would check with my local agent and asked for the best way and the cheapest price. You could probably get cheaper insurance with Historical Plates, but then you may not be able to haul any loads with it.

The weight sounds about right. I weighed my '62 GMC 4000 16 Ft Flatbed and it was about 8000. Mine didn't dump though which made it lighter.

Bill

[watahyahknow]

that truck looks usuable you could make long boards at the end and a winch at the front and use it as a car hauler , as for the curbweight , dont you have some weighingbridge in the neighbourhood like at the grainfactory or the scrap metal dealer you can use to get the weight of the truck ?