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front brake problems!! #1840664
06/03/15 05:32 PM
06/03/15 05:32 PM
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Martin TN
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ridin98ci Offline OP
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I am getting near the end of my rope...
I have a 75 D100, factory 440, auto, 9.25 3.23 gears...slowly trying to get her on the road then modify it little at a time...
ANYWAY.....I have replaced the front brakes on it, calipers, rotors, hardware....the passenger front is hanging up...the caliper its self....what else can it be?


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Re: front brake problems!! [Re: ridin98ci] #1840699
06/03/15 06:38 PM
06/03/15 06:38 PM
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Grand Prairie,Texas
stumpy Online content
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Did you lube the sliding surfaces? When the caliper hangs up try opening the bleeder and see if it loosens up. If it does you may have a collapsing rubber brake line on that wheel. If that is the problem then replace both sides to be safe. If not that then it may just be a bad new caliper. It has happened more than once.

Re: front brake problems!! [Re: ridin98ci] #1840964
06/03/15 11:03 PM
06/03/15 11:03 PM
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Martin TN
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Yeah its all lubed up and free...and when I take the caliper off its tight to push in with a c clamp...so could that be the hose as well?


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Re: front brake problems!! [Re: ridin98ci] #1840975
06/03/15 11:12 PM
06/03/15 11:12 PM
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crack the hose fitting loose, on the end furthest from the caliper, then give it a squeeze. if it doesn't flow, the inner liner has collapsed, and is forming a seal preventing backflow, as mentioned by stumpy. if it flows freely, tighten it up, and move back towards the proportioning valve, and crack each fitting, until you get no fluid. the hoses are known to delaminate inside, causing a one way flap.


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Re: front brake problems!! [Re: ridin98ci] #1840984
06/03/15 11:22 PM
06/03/15 11:22 PM
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Martin TN
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OK...I'll give it a shot


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Re: front brake problems!! [Re: Golden-Arm] #1841146
06/04/15 02:42 AM
06/04/15 02:42 AM
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Chicago Burbs
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Originally Posted By Golden-Arm
crack the hose fitting loose, on the end furthest from the caliper, then give it a squeeze. if it doesn't flow, the inner liner has collapsed, and is forming a seal preventing backflow, as mentioned by stumpy. if it flows freely, tighten it up, and move back towards the proportioning valve, and crack each fitting, until you get no fluid. the hoses are known to delaminate inside, causing a one way flap.


I had that exact problem with my 2500 Van... drove me nuts... now it is perfect.

Re: front brake problems!! [Re: ridin98ci] #1841179
06/04/15 04:50 AM
06/04/15 04:50 AM
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State of Confusion
hp383 Offline
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Had a similar issue on a gov rebuilt HD D44. Everything had been replaced before it was mothballed. I gave up two perfectly good steel piston calipers for a pair of crappy phenolic piston calipers before I realized it was the hoses had corroded on the inside.


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Re: front brake problems!! [Re: hp383] #1841214
06/04/15 09:16 AM
06/04/15 09:16 AM
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Martin TN
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Originally Posted By hp383
Had a similar issue on a gov rebuilt HD D44. Everything had been replaced before it was mothballed. I gave up two perfectly good steel piston calipers for a pair of crappy phenolic piston calipers before I realized it was the hoses had corroded on the inside.

Are the steel piston ones really better? I swapped mine out too....but if they aren't the reason it was hanging up I could swap back.....I just assumed they were freezing up.

The hoses seem to be a common problem I will give it a shot today.


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