The Stovebolt Site Forums The Parking Lot Big Bolts 1965 c60 rear brakes/ PTO seals

Got the truck back together a while ago ( 1965 Chevy C60 two speed corporate rear and 292Ci with SM420 4 speed). TWO questions in one

1- I've got the PTO seals and gaskets I need. Is there anything I need to be careful of when i remove the unit from the side of the SM420? Never done a PTO before and this thing leaks like crazy.

2- rear brakes are getting hot and are to be sticking. I drove if with half a load of sunflowers to the farm i sold them to and when i got back the drums were 400F WAY TO HOT in my opinion. The shoes got relined and the drums were scuffed "clean" springs were in good shape when reused. I've got the adjusters backed all the way off now ( they are not even touching the shoes). Guessing I've got a groove or something that the shoes are stuck in or its not relieving the pressure back to the system. Anyone have any testing that I have not thought of. Could the Hydrovac be holding pressure to the rears? The front are not even warm to the touch on a quick 1/2 mile trek down the road.

It ain't the HydroVac if the fronts are releasing. I would pull the rear drums, find out if the wheel cylinders are relaxed and why the shoes are hanging up on the backing plate or are the springs installed wrong/ weak/ missing. Did you replace ALL of the brake lines AND rubber hoses? I haven't had a PTO but I believe it is a simple flange mount with no rocket science involved, remove the bolts and pull the PTO gear box off.

The PTO should be holding some oil in, so be prepared for a bath unless it has already drained out.

Ed

Open a rear bleeder and see if you get a squirt of fluid. It sounds like you've got a restricted flex line between the frame and the rear axle. "New" doesn't necessarily mean "good".
Jerry

Thank you guys all very much. All good things to know and lookout for. Yeah the flex line was replaced and bled but like Hotrod said. It could already be swelled up. Ill crack them and find out!

I think i have figured it out ( maybe) cracked the bleeder as Hotrod Lincoln told me to. Got a squirt of fluid and i could see the shoes went up against the star wheels after that. I retrofitted a brake line from a 2500 silverado like below onto it since my brass tee was cracked at the incoming end ( i was having a very hard time finding that tee for some reason) . Its a small line only 1/8" hose. Guessing i may have a restriction there or a new swelled hose like mentioned. We shall see. Got another one on order with a larger hose more like what was stocked. going to check everything after the new hose is on and hopefully that flex line was just swollen! that would be an easy fix instead of ripping everything back apart.

https://www.1aauto.com/chevrolet-gm...e-hose-trq-bla62144/i/1abrl00661/2724457

PTO is easy, just remove the output shaft and 6-bolts holding it to the trans and it's all yours!

The PTO bolt pattern is the industry standard SAE 6-Bolt, so gaskets are easy to find. Knock the seal out and take it to your local bearing shop for replacement.

Mike B

A suitable substitute for that flex line might be a long hose for a grease gun. They have 1/8" NPT male pipe threads on both ends, they're rated for a couple of thousand PSI, and that thread can be adapted to a variety of flared hard lines with brass fittings.

www.ebay.com/itm/374217029507?

Jerry

When I replaced all of my brake lines and hoses, I had no trouble finding the correct ones. Pretty stock lengths and ends at the independent auto parts store here.

You may want to inspect your steel brake lines for kinks as well. If your rear brakes have two wheel cyilinders, you will want to check the line that is running on the inside of the drum as well.

I replaced all of the wheel cyilinders on my 9600/350 from rock auto, so the hydraulics are easy to find - it's the drums and friction material that gets iffy.