Brake pedal needs manually reset after depressing

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84K30

84K30

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Hello,

I recently changed out a leaking hydroboost unit in my 84 K30. After doing so, I noticed that the brakes seemed to remain engaged after releasing the pedal. After driving the truck a while, I discovered that the brake pedal is not fully returning to the "up" position after being pressed. Brakes work as they should and release when I manually reset the pedal. It is acting if I forgot to reinstall a pedal return spring but I do not recall having removed one when I swapped out the booster. Any ideas what could be causing this?

Eric
 
84K30

84K30

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My power steering pump seems to groan and the belt squeals occasionally. Is it possible that my power steering pump is on the way out and not producing enough pressure to reset the pedal? I may go ahead and replace the pump since I am not sure how old/how many hours the unit is/has on it. If that doesn't resolve my issue, I suppose I'll swap out the hydroboost unit again.
 
BKING33

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I didn't have any pedal problem with my hydroboost, but I did have a moan/groan noise intermittently in my Burb. I had just replaced a leaking hydroboost with one I pulled off a donor truck. Luckily I decided to replace the pump and not swap out the booster. Haven't heard any noise in over 6 months now.
 
84K30

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Thanks for responding. I'll probably go ahead and change out the PS pump then and see what happens.
 
BKING33

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Your welcome. Just make sure to get a new one. Reman pumps are junk. Mine was from BBB Industries.
 
PrairieDrifter

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If your brake pads and shoes are too wore out it can cause that pedal issue as well. In that situation you're over extending the master.
 
AuroraGirl

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PrairieDrifter said:
If your brake pads and shoes are too wore out it can cause that pedal issue as well. In that situation you're over extending the master.
Click to expand...
I could see rear shoe and maybe not being adjusted properly(or if the shoes can be in the wrong orientation, the primary shoe being in the secondary spot), but the front i could see maybe if the inboard pad never was clinched it possibly is worn more, and thats where the piston has to push, so I could see it having extra travel even if on a quick look at the outboard pad it looks fine.
 
PrairieDrifter

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AuroraGirl said:
I could see rear shoe and maybe not being adjusted properly(or if the shoes can be in the wrong orientation, the primary shoe being in the secondary spot), but the front i could see maybe if the inboard pad never was clinched it possibly is worn more, and thats where the piston has to push, so I could see it having extra travel even if on a quick look at the outboard pad it looks fine.
Click to expand...
I had a leaky wheel cylinder and it would do this, and when the fluid got lowish, it would cause this exact issue. Did it more often in the cold, didn't even need to have low fluid.

It leaked just enough for the pedal to do that, but still not enough for me to have "bad brakes"
 
AuroraGirl

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PrairieDrifter said:
I had a leaky wheel cylinder and it would do this, and when the fluid got lowish, it would cause this exact issue. Did it more often in the cold, didn't even need to have low fluid.

It leaked just enough for the pedal to do that, but still not enough for me to have "bad brakes"
Click to expand...
probably kept itself bled but of course when the pedal goes back and some time passes, there becomes a void that has to be filled before youll see any braking
 
84K30

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Front brakes are not overly worn. Rear brakes could be-I've never pulled the drums because the brakes had always worked and never made any strange noises of hung up. Due to the need to pull the axles, I figure I'll just changes the drums, wheel cylinders, bearings, shoes and hardware when I do get around to checking them

-Eric
 
84K30

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Also, the pedal "sticks" regardless of how far/hard I push on the pedal. It will stay depressed with even the slightest amount of pressure
 
PrairieDrifter

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84K30 said:
Also, the pedal "sticks" regardless of how far/hard I push on the pedal. It will stay depressed with even the slightest amount of pressure
Click to expand...
Did it do it before you replaced the master?
 
AuroraGirl

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Uh... with that knowledge..

have you looked at your pedal return spring?

its a spring that returns your pedal
 
AuroraGirl

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iirc the spring should be attached to the same point or at least pull in the same angle as the rod so it can pull it out the same "direction" without putting undue pressure on the seal. i could be wrong im just thinking otloud.
 
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