Question
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Mar 2, 2008, 06:42 AM
|  | Über Member  | | Join Date: May 2007 Location: Florida Keys
Posts: 6,260
| | | 88 Chevy Cheyenne 2500 brakes hanging.
I have a friend who had a problem with brakes hanging, He bought 2 rear wheel cylinders, I change out for him. Tried to ge him to Service Manual, He got Front Calipers and Pads instead. I installed for him. Then He bought Master Cylinder, He changes it. Still hangs, It has another unit with electronics at Master Cylinder. Any tests or input you can suggest.
TX? Thanks.
I think he will put out for the Manual Now. People don't understand the amount of Time and Parts that can be saved by a Manual.
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Answers
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Mar 2, 2008, 05:03 PM
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#2
| | | Senior Cars & Trucks Expert
Join Date: Jun 2006 Location: Undisclosed, Republic of Texas
Posts: 7,749
| Be sure to grease the caliper pins with silicone grease or Squeak Relief (silicone grease with Moly). I use Squeak Relief on all rear drum brake rub points. |
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Mar 2, 2008, 06:27 PM
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#3
| | Über Member
Join Date: May 2007 Location: Florida Keys
Posts: 6,260
| Hoping you'd show up, No all that is fine. Someone did mention deterioiated brake lines with bits of rubber that Floats? and acts like a check valve at Master Cylinder.
You push pedal, it applies pressure to wheels, when letting off it plugs the return? | |
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Mar 2, 2008, 06:41 PM
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#4
| | | Senior Cars & Trucks Expert
Join Date: Jun 2006 Location: Undisclosed, Republic of Texas
Posts: 7,749
| Sounds like you need to change deteriorated brake lines, then flush the system. | |
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Mar 2, 2008, 06:46 PM
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#5
| | Über Member
Join Date: May 2007 Location: Florida Keys
Posts: 6,260
| So far thats the plan, they got new brake lines. I was going to disconnect lines, blow them out from above to wheel cylinders/calipers. What would be the best way to deal with cylinders/calipers(rubber bits). I'm hoping since it supposedly floats, they may be OK? | |
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Mar 2, 2008, 07:01 PM
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#6
| | | Senior Cars & Trucks Expert
Join Date: Jun 2006 Location: Undisclosed, Republic of Texas
Posts: 7,749
| Flushing would likely be sufficient; however, if you are really concerned, rebuild the wheel cylinders. Then, you should have all contaminants removed, after bleeding the system. | |
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Mar 2, 2008, 07:05 PM
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#7
| | Cars & Trucks Expert
Join Date: Apr 2007 Location: Pale Blue Dot
Posts: 4,994
| Don't overlook that deterioration of hydraulic hoses can act like a one-way check valve. If cracking the bleeder relieves the "hangning", look to replace the hydraulic hose to that section and flush the remaining sections. Also, the proportioning valve can become an issue... | |
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Mar 2, 2008, 07:08 PM
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#8
| | Über Member
Join Date: May 2007 Location: Florida Keys
Posts: 6,260
| He just bought new cylinders, calipers, shoes and pads, they are all installed and no better, He didn't want to turn anything, and they didn't look bad. | |
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Mar 2, 2008, 07:12 PM
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#9
| | Über Member
Join Date: May 2007 Location: Florida Keys
Posts: 6,260
| Thanks Captain, I did crack the bleader, fluid and pressure released, and wheel was free again. I will check Proportioning valve. Thanks all, I'll get back with the results. | |
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Mar 2, 2008, 07:12 PM
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#10
| | Cars & Trucks Expert
Join Date: Apr 2007 Location: Pale Blue Dot
Posts: 4,994
| Turning to me would be for pulsation.... not so much a factor.
If he's flushing the system, does he see good, or more importantly: even flow from all corners? | |
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