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#1
09-17-2010, 06:03 PM
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Help with Vacuum 79 300TD
I have a 79 300TD and want to know what is good vacuum coming off the brake booster line
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#2
09-17-2010, 11:20 PM
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good would be 22" acceptable would be 15 or so.
it should be steady. you may have to plug the nipples to get this if your actuators are leaking or you have worn vac fittings.
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!!  1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#3
09-18-2010, 08:54 AM
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I'm only at 10 is it hard to rebuild the pump
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#4
09-18-2010, 08:56 AM
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before you think of rebuilding the pump you need to be SURE there are no leaks in the line.
you are measuring 10 at the connection to the booster, and everything else on the line is plugged?
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#5
09-18-2010, 10:12 AM
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there is only one line coming off the brake line and that's where I took the reading
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#6
09-18-2010, 10:45 AM
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ahhh.
no, what you need to do is plug that connection, then unbolt the line itself from the booster, then get your reading from the big end of the line. you may have a bad booster that's bleeding vacuum too fast for your pump to maintain vacuum.
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#7
09-18-2010, 06:10 PM
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Thanks. good news I have 18-20 lbs of vacuum. problem the two lines off the ignition where on backward, car just did not want to shut off
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#8
09-18-2010, 06:55 PM
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Backward how?
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#9
09-19-2010, 09:42 AM
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on the ignition there are two vacuum lines they where mixed up one was open when the car was running not letting vacuum build.
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