Hydraboost brake quirks??? Help please. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Kenbo-Slice · 02-09-2010, 07:52 PM

I just replaced the front calipers on my dually because they didnt seem to be working properly. If I stomp the brake pedal, it pulls to the right if i don't hold the wheel. When I start to drive again it feels like the left front brake is hung up a bit. For some reason the brake pads (brand new from previous owner) dont have clips that go into the piston, or clips that go on the back side of the caliper on the outside. What I don't understand is that the truck is pulling to the right when I brake hard. but the outside of the rotor on the right side barely looks like its rubbing. I really don't like these slide type (delco?) calipers, I would much rather have the bolt type, they just seem to slide better. With the caliper replacement, the brakes seem to be working better, but they're still pulling and acting strange. Any ideas or suggestions guys?

cableguy0 · 02-09-2010, 07:59 PM

first thing to do is pull the calipers clean everything good. put the proper hardware on and lube everything properly. a bad brake hose will also collapse and cause the caliper to stay locked up. As i said first thing is to get the system mechanically sound and make sure everything moves freely

fla wildman · 02-09-2010, 08:09 PM

Replace your ruber brake line they brake down inside and acted like a check valve.

And after a while the let go and it drives fine? Am I right if so its more than likely that.

Kenbo-Slice · 02-09-2010, 08:24 PM

Quote:

Originally Posted by fla wildman

Replace your ruber brake line they brake down inside and acted like a check valve.

And after a while the let go and it drives fine? Am I right if so its more than likely that.

Ah Ha! That may be it then, great man, thank you! That's exactly what it's doing. It hangs up and then it frees up after a little bit.

2badgn · 02-10-2010, 10:24 AM

Quote:

Originally Posted by Kenbo-Slice

Ah Ha! That may be it then, great man, thank you! That's exactly what it's doing. It hangs up and then it frees up after a little bit.

Do u get a strange vibration when driving on the highway?

Does the brake pedal feel strange?

Kenbo-Slice · 02-09-2010, 08:30 PM

That may also be the reason why they were such a pain in the butt to bleed after I put on the new calipers. It makes a lot of sense now, haha. I just hope that it IS the culprit.

fla wildman · 02-09-2010, 08:34 PM

It took me replacing the master, the proportioning valve (that was fun) before it I got back to the hose.I got bad ones from the part store.But now that the first thing I go to when I have a brake problem.

Kenbo-Slice · 02-09-2010, 09:37 PM

Fair enough guys, I guess I'm going to order some front brake hoses. Thank you all!

Kenbo-Slice · 02-10-2010, 03:16 PM

Not really any vibrations, the pedal feels a bit soft and then it will work. About 1/2 way down before it seems to work well.

02-09-2010, 07:52 PM	#1
Kenbo-Slice Registered User Join Date: Jan 2010 Location: Poughkeepsie, N.Y. Posts: 108	Hydraboost brake quirks??? Help please. I just replaced the front calipers on my dually because they didnt seem to be working properly. If I stomp the brake pedal, it pulls to the right if i don't hold the wheel. When I start to drive again it feels like the left front brake is hung up a bit. For some reason the brake pads (brand new from previous owner) dont have clips that go into the piston, or clips that go on the back side of the caliper on the outside. What I don't understand is that the truck is pulling to the right when I brake hard. but the outside of the rotor on the right side barely looks like its rubbing. I really don't like these slide type (delco?) calipers, I would much rather have the bolt type, they just seem to slide better. With the caliper replacement, the brakes seem to be working better, but they're still pulling and acting strange. Any ideas or suggestions guys? __________________ It's a Jeep towing machine! (at least it will be)

02-09-2010, 07:59 PM	#2
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,948	Re: Hydraboost brake quirks??? Help please. first thing to do is pull the calipers clean everything good. put the proper hardware on and lube everything properly. a bad brake hose will also collapse and cause the caliper to stay locked up. As i said first thing is to get the system mechanically sound and make sure everything moves freely __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

02-09-2010, 08:09 PM	#3
fla wildman Registered User Join Date: Nov 2009 Location: st.cloud fla Posts: 76	Re: Hydraboost brake quirks??? Help please. Replace your ruber brake line they brake down inside and acted like a check valve. And after a while the let go and it drives fine? Am I right if so its more than likely that. __________________ 83 Chevy 4x4 stepside was a 6.2 stick now 350 auto 86 Cutlass with built 350 street/strip car 85 K5 all stock 2006 F250 6.0 the puller 69 c10 soon to be k30 too far gone to fix

02-09-2010, 08:30 PM	#6
Kenbo-Slice Registered User Join Date: Jan 2010 Location: Poughkeepsie, N.Y. Posts: 108	Re: Hydraboost brake quirks??? Help please. That may also be the reason why they were such a pain in the butt to bleed after I put on the new calipers. It makes a lot of sense now, haha. I just hope that it IS the culprit. __________________ It's a Jeep towing machine! (at least it will be)

02-09-2010, 08:34 PM	#7
fla wildman Registered User Join Date: Nov 2009 Location: st.cloud fla Posts: 76	Re: Hydraboost brake quirks??? Help please. It took me replacing the master, the proportioning valve (that was fun) before it I got back to the hose.I got bad ones from the part store.But now that the first thing I go to when I have a brake problem. __________________ 83 Chevy 4x4 stepside was a 6.2 stick now 350 auto 86 Cutlass with built 350 street/strip car 85 K5 all stock 2006 F250 6.0 the puller 69 c10 soon to be k30 too far gone to fix

02-09-2010, 09:37 PM	#8
Kenbo-Slice Registered User Join Date: Jan 2010 Location: Poughkeepsie, N.Y. Posts: 108	Re: Hydraboost brake quirks??? Help please. Fair enough guys, I guess I'm going to order some front brake hoses. Thank you all! __________________ It's a Jeep towing machine! (at least it will be)

02-10-2010, 03:16 PM	#9
Kenbo-Slice Registered User Join Date: Jan 2010 Location: Poughkeepsie, N.Y. Posts: 108	Re: Hydraboost brake quirks??? Help please. Not really any vibrations, the pedal feels a bit soft and then it will work. About 1/2 way down before it seems to work well. __________________ It's a Jeep towing machine! (at least it will be)

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