D400 Brake bleeding process

Suspension, Brakes, Tires, Wheels etc..

D400 Brake bleeding process

Postby moparbay » Sun Aug 13, 2017 7:50 pm

Hi,

does anyone know if there is a special bleeding process with trucks that have the frame mounted booster master cylinder or is it the regular RR - LR - RF - LF process?

Also, there is a hose that runs from the frame mounted booster that vents (or sucks) in the cab. Mine is on the driver side next to the tank, what is the purpose of it and is there supposed to be a filter of any kind on it? After stop cranking the engine (non start) i can hear that thing gurgling for a couple of seconds and am assuming it's vacuum related.
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Re: D400 Brake bleeding process

Postby dodgeboykim » Sun Aug 13, 2017 9:28 pm

Seems I gravity bled booster then to rr and lr wheels and fr and fl wheel on my D500. But I used a vacuum bleeder to finish it. Worked good as I was alone when done.
My truck is younger than me.
66 W100. 70 D 500 with 69 Hiab Speed Loader. 96 Ram 3500 Club Cab Cummin's 5 spd. 97 Ram 1500 Club Cab 5.9 gas auto. 83 W200 L/B 360 auto on propane.
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Re: D400 Brake bleeding process

Postby 712edf » Mon Aug 14, 2017 12:40 am

Does your D400 have a frame mounted vacuum tank? My W600 does. Also has a vacuum gauge in the dash hooked to it.

My 65 W500 didn't have the vacuum tank, but did have the hose up into the cab. Since that truck didn't run I can't tell you what the hose was for.

Bucky
1966 W500
1975 W600
1978 W200 club cab
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Re: D400 Brake bleeding process

Postby moparbay » Mon Aug 14, 2017 5:14 pm

712edf wrote:Does your D400 have a frame mounted vacuum tank? My W600 does. Also has a vacuum gauge in the dash hooked to it.

My 65 W500 didn't have the vacuum tank, but did have the hose up into the cab. Since that truck didn't run I can't tell you what the hose was for.

Bucky


No vacuum tank, just a frame mounted vacuum booster/master cylinder combo that gets vacuum from the intake and has the mysterious hose going into the cab.
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Re: D400 Brake bleeding process

Postby dodgeboykim » Mon Aug 14, 2017 8:43 pm

All trucks with Hydraulic brake booster under cab have hose up into cab. Air inlet filter for booster diaphragm on one side. I have seen them on D and W 200, My D300. On a D400 I wrecked years ago and on my 70 D500. :thinking :thinking
My truck is younger than me.
66 W100. 70 D 500 with 69 Hiab Speed Loader. 96 Ram 3500 Club Cab Cummin's 5 spd. 97 Ram 1500 Club Cab 5.9 gas auto. 83 W200 L/B 360 auto on propane.
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Re: D400 Brake bleeding process

Postby moparbay » Mon Aug 14, 2017 10:03 pm

dodgeboykim wrote:All trucks with Hydraulic brake booster under cab have hose up into cab. Air inlet filter for booster diaphragm on one side. I have seen them on D and W 200, My D300. On a D400 I wrecked years ago and on my 70 D500. :thinking :thinking


You wouldn't have any info on the air inlet filter, do you? maybe a pic? All i have is a rusty fitting sticking through the floor. thanks
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Re: D400 Brake bleeding process

Postby PwrWgnDrvr » Tue Aug 15, 2017 9:41 am

Its pretty basic. About the size of a soup can, holes in the sides, filled with fiber similar to an oil bath air filter, stuck on the end of the pipe.
They put them inside the cab to keep from getting filled with water and dirt kicked up off the road.
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Re: D400 Brake bleeding process

Postby Grodr625 » Thu Sep 28, 2017 1:09 pm

Process is booster bleed, RR, LR, RF, LF, back to booster for final touch per the shop manual. My air inlet filter is attached directly to the frame mounted booster. One vacuum line to engine and another to reserve tank behind booster.
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