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Brakes will cause the wheels on the front and the wheels and axle on the rear to try to move the opposite direction you are going. 

 

 

Clunk from the front??? Could be worn tension rod bushings. But I would imagine it would do it all the time.

Clunk on the rear? My 620 frame rotted out of sight and the leaf spring mount separated and would clunk, but again it was continuous.

 

Probably the sliding brake adjusters in the backing plates. They self adjust and center themselves once the brakes are tight against the rims, but once centered, they should stay there and move only as the shoes wear down. If the brakes are not adjusted snug enough this might be the cause. A broken return spring? I would look at all of them and see about a little brake grease on the rubbing points the metal parts of the shoes make with the backing plate. Maybe a shoe is hanging up when the pedal is released.

 

There is a good chance the 521 used leading and trailing shoes. This is characterized by the lining on one shoe being closer to the wheel cylinder and the other closer to the adjuster on the bottom. If not careful it's possible to have two leading shoes on one side and two trailing on the other or simply a trailing shoe in the leading shoe position. Not all shoes are this way but the intent is that the forward motion adds a significant amount of extra friction to the shoe moving in the direction of travel. If you stop better backing up chances are they are reversed. Like I say the 521 may have come with leading and trailing or they may have been replaced with evenly lined shoes.

 

Old Doges were notorious for grabby brakes in the morning the first time you used them when it was damp. Always good to drag the brakes for half a block to warm them. This was my '64 and probably asbestos linings back then.

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10 hours ago, datzenmike said:

Brakes will cause the wheels on the front and the wheels and axle on the rear to try to move the opposite direction you are going. 

 

 

Clunk from the front??? Could be worn tension rod bushings. But I would imagine it would do it all the time.

Clunk on the rear? My 620 frame rotted out of sight and the leaf spring mount separated and would clunk, but again it was continuous.

 

Probably the sliding brake adjusters in the backing plates. They self adjust and center themselves once the brakes are tight against the rims, but once centered, they should stay there and move only as the shoes wear down. If the brakes are not adjusted snug enough this might be the cause. A broken return spring? I would look at all of them and see about a little brake grease on the rubbing points the metal parts of the shoes make with the backing plate. Maybe a shoe is hanging up when the pedal is released.

 

There is a good chance the 521 used leading and trailing shoes. This is characterized by the lining on one shoe being closer to the wheel cylinder and the other closer to the adjuster on the bottom. If not careful it's possible to have two leading shoes on one side and two trailing on the other or simply a trailing shoe in the leading shoe position. Not all shoes are this way but the intent is that the forward motion adds a significant amount of extra friction to the shoe moving in the direction of travel. If you stop better backing up chances are they are reversed. Like I say the 521 may have come with leading and trailing or they may have been replaced with evenly lined shoes.

 

Old Doges were notorious for grabby brakes in the morning the first time you used them when it was damp. Always good to drag the brakes for half a block to warm them. This was my '64 and probably asbestos linings back then.

 

Wait a minute are you cluttering up our covid shitfest thread with car talk? 

 

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17 hours ago, Dguy210 said:

 

Wait a minute are you cluttering up our covid shitfest thread with car talk? 

 

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It was tied back to the universal truths about Datsuns and the bungee cord n brick - I use rope n a chock.  I did add a question about why rear brakes clunk early in the morning, trying to kill two birds with one post and save the world?  Yes, how dare we.

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2 hours ago, Mattndew76 said:

Meh I'm self employed so no coronacation for me.

 

I want that natural immune response though. 

5454BB33-6103-4E0D-9BFF-C6DBDCE4986D.jpeg

 

If only there were a way to get the immunity without having to getting sick....

 

Hey Matt, does that thermometer have wi fi? Expect the co-vid police any moment.

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Fuck, are you alright? What am I saying? That's not a good indication. Treat the symptoms. Acetaminophen will lower it some. Maybe let up on the nun porn.... or floor it. If you're going to hell anyway might as well drift in like a boss.

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Still mild grade fever and rattle cough but all in all so far so good.

 

I’m sitting in the sunshine on the south porch. I hate closed off rooms. I made sure the wife opened our windows on the house to get some fresh air circulation since this virus thrives on poor air circulation. 
 

 

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