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Old 05-30-2014, 07:52 AM   #1
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Park Brake Plunger Leak

My Park Brake plunger is leaking air and if I move it to a certain position leak stops for a while but then continues. I assume I will have to replace the plunger - correct? Is this something I can do with minimum tools and somewhat mechanical knowledge. I just left OK and headed for WA (home) and would like to wait until I get home but am I looking at a huge safety issue? thanks 2008 Monaco Diplomat 400.

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Old 05-30-2014, 08:26 AM   #2
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Location: Powell River, B.C.
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The dash , park brake control, supplies air to the park ( spring brakes ) on the rear axle to keep them released. Because the coach air system continually replaces any lost air , a slight leak should not be a problem.
Personally , I would want the part in hand during my travels, just in case.
Remember to completely drain the air tanks before replacement. Can't think that it is a difficult job, access to the back of the control may be tight, but that's about it.

EDIT: There are only about 4 common types of park brake controls in use in air brake systems. Most truck repair shops will have what you need.

99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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Old 05-30-2014, 10:11 PM   #3
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For more information on air brake systems and help with parts identification visit,


For a free download.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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brake, leak

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