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Old 04-28-2020, 10:36 PM   #1
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Parking brake button hard to pull out

I have a 97 newmar pusher and have a very hard to pull parking button. It pulls on my dash I think to much. Should this button be easy to pull out to set or are they all stiff like mine?
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Old 04-28-2020, 11:11 PM   #2
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Might start with a little white grease on the shaft going into unit. Have had the large nut come a little loss which made it harder to push in and out.
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Old 04-28-2020, 11:11 PM   #3
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It will pull a little hard, but on the age of your unit, try squirting a little Silicone lubricant on the stem when you have the brake set. Work it a few times to see if it frees up a bit.

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Old 04-29-2020, 01:52 AM   #4
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If lubing doesn't help, maybe you can unbolt it, slip it out and then put a large fender washer or even larger plate behind the dash the spread out the pressure and then reinstall.
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Old 04-29-2020, 02:04 AM   #5
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The valve's internal mechanism , is working against 90>110 psi of air pressure , so it can't be too free , my dash flexes too , but in 10 years of my use and 21 total, it hasn't developed any cracks.
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Old 04-29-2020, 02:15 AM   #6
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Iíve also seen that in other older vehicles with a plastic dash. I wouldnít call it abnormal, but I can see the concern. I agree some light lube may be in order, but as long as it activates automatically between 20 and 45 psi, itís operating properly. If it doesnít itís time for some repairs.
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Old 05-23-2020, 09:18 AM   #7
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Quote:
Originally Posted by bioguy View Post
I have a 97 newmar pusher and have a very hard to pull parking button. It pulls on my dash I think to much. Should this button be easy to pull out to set or are they all stiff like mine?
Valve is working against air pressure so should be stiff, conversation with my diesel buddy confirmed proper operation. My original valve has not caused any cracks in the dash but there has always been flex.
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Old 05-23-2020, 01:37 PM   #8
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Not sure just how much resistance your switch is providing. I could well be a problem that needs fixing. But - Considering the results of pulling/pushing the air brake button, it should be hard to activate and deactivate. I have grandkids roaming in and out at times, one of which loves to push/pull buttons and flip switches just to see what happens. I wouldn't want that switch, in particular, to be any easier to operate. In fact, some owners have purchased and installed a mechanical lock for that switch to make it even harder. Just a thought.
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Old 05-23-2020, 01:59 PM   #9
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Drain the air system and see how the switch feels. That takes the air out of the equasion.

Actually the button should pop out on its own once the air drops to 40 PSI or less.

If not, spray some lubricant around the button shaft and see if that helps.
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Old 05-23-2020, 03:20 PM   #10
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Quote:
Originally Posted by twinboat View Post
Drain the air system and see how the switch feels. That takes the air out of the equasion.

Actually the button should pop out on its own once the air drops to 40 PSI or less.

If not, spray some lubricant around the button shaft and see if that helps.
X2 if you’re not familiar with the test, fan the brake pedal to lower the air pressure until the know pops out and note the air pressure at which this happens. As in my post above, this should happen between 20 and 45psi. If it doesn’t, you have an issue.
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