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66rmack

Air psi problems

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On my 89 superliner. When I first went and looked at it. It built air psi. But when it got delivered, it wouldn't build any at all. Nothing has changed. I cracked a line and you can hear air but it's not much. So I guess I wondering is there a check valve or a governer on the compressor? I know freightliners have a governer that if it goes out it won't build air. I'm not familiar with the systems. I may have looked right at it and didn't notice one. Thanks in advance for any insite. 

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Are all the air tank drains shut? 

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1 hour ago, terry said:

Are all the air tank drains shut? 

Yep they are. I had to check twice. 

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they have 4....just double checking drivers side  1 on air tank under batt. box    2 on pass. side air tank under batt. box  and one on the frame rail behind the trans on the drivers side.     the air governor is on the fire wall passenger side.   

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8 minutes ago, gearhead204 said:

they have 4....just double checking drivers side  1 on air tank under batt. box    2 on pass. side air tank under batt. box  and one on the frame rail behind the trans on the drivers side.     the air governor is on the fire wall passenger side.   

Thank you! I'll check it out. I'm starting to get to know semi's I have a lot to learn! 

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air brake systems need to be understood before you delve into trying to fix problems shotgun style... and you need to know how to pre-trip your truck correctly even if you haven't got a CDL or equivalent...

here is some good bedtime reading, or in your favourite place of solitude ;-)

BC Mack

 

Bendix Air Brake Handbook[1].pdf

air brake problem finder.pdf

tractor_air_brake_troubleshooting_guide[1].pdf

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