Brake Problem - Diesel Truck Forum -
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post #1 of 4 (permalink) Old 04-12-2009, 06:35 AM Thread Starter
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Brake Problem

I DONO?--as I*M new to the diesel pick up Scene--& in asking--in referance to changing my Vacume brake system over to a Better? system--I was in hopes of getting some answers?--as locally I*M informed that Dodge had three three brake systems in 89? or 90?--it appears my Vacume pump is BAD!--{hard peddel--after many bleedings}--some one? must! have ran into this Problem!--on the DG as I read of the many Up grades to make Dodges GO!--& in making them GO! I assume?? some one? would be the One to make E*M STOP Better!--personally I*D be more than GLAD to assist any One? in making a Big Air Brake JOB STOP!--step by step--w/ NO B/S! just step by step FACTS! as I deal w/ 600HP tractors hauling 100,000 Lbs!--& I don*t just replace Units I Re-Build what you allready have! & Garrantee it for a full Year! & personally I*M very disapointed in NO REPLYS!--Ole JIM--
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post #2 of 4 (permalink) Old 04-13-2009, 05:59 AM
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There are 2 parts to the vacuum boost for the brakes. Put a vacuum gauge on the line to see which it is - over 17" at sea level means the vacuum pump is working and the booster is broke - probably under $100.

With no vacuum it is the pump - over $300 for a rebuilt, if it has 5" of vacuum a $20 seal kit may do it.

The hydroboost has quite a bit more assist than a vacuum booster and the return spring is softer.

Mine takes about 40 # to lock up with boost assist and about 90 # with no vacuum - the 40 # is higher than most, normal is 15-30 #. I have moved cars that took less than 3 # for a full brake application.


93 Dodge /CTD, IC, 518, club cab LE, BHAF, KDP fixed, kelderman air ride
81 Isuzu /C223na, 5spd
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post #3 of 4 (permalink) Old 04-14-2009, 12:19 AM
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i replaced my booster this past weekend $84 an some change, with the core charge at auto zone. brakes work great now.
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post #4 of 4 (permalink) Old 04-29-2009, 03:44 AM Thread Starter
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Brake Problem

Brake problem Now Fixed--Thanks--Ole JIM--
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