Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
What would make air pressure back feed to the foot peddle
What would make air pressure back feed to the foot peddle and jonny bar at 120 psi on a kenworth. If you pull jonny bar and press on brakes air leak stops… read more
Joe
Joe
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I have a 2007 kenworth t800, when i have the park brake set
Hi, i have a 2007 kenworth t800, when i have the park brake set and step on the brake pedal i have air coming out of the exhaust port on the parkbrake valve … read more
Mike Mcmillan
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Working on a 1999 t600 kenworth problem is when aplpying
working on a 1999 t600 kenworth problem is when aplpying brake pedal air leak thru red glad hand hose and also leaking from dash valves exhaust. when parked with parking brakes on it works fine when p… read more
Mike Mcmillan
Mike Mcmillan
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I step on break peddle and I feel tractor is breaking not
I step on break peddle and I feel tractor is breaking not the trailer, when I'm stopping I can pull red knob out and truck will keep rolling and you don't hear air exhaust from the trailer. … read more
Daniel Wilson
Daniel Wilson
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With both red and yellow brake valves pulled out and
With both red and yellow brake valves pulled out and applying brake pedal I have air coming out of red gladhand. No trailer aka bobtail. 2001 Kenworth T800 last 6 of VIN 875278… read more
NicholasM1019
NicholasM1019
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Vocational, Technical or Trade School
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I have the same problem as noted in this post. 2001 Kenworth
I have the same problem as noted in this post. JA: Okay, the Mechanic will know what to do. Before I connect you, is there anything else you'd like them to know about your car? Customer: 2001 Kenworth… read more
timdieseltech
timdieseltech
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1999 Kenworth T800 Red Trailer supply valve wont stay in
1999 Kenworth T800 Red Trailer supply valve wont stay in when i push it. It pushes right back out. New dash valve lines are not crossed. Checked all other valves it still happens. Disconnected Emergen… read more
BrentR718
BrentR718
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I have a 05 Freightliner day cad. Have an air leak in dash
I have a 05 Freightliner day cad. Have an air leak in dash where foot valve bolts to firewall. Only leaks when foot valve is depressed. Checked all chambers replaced foot valve no change. It does not … read more
Daniel Wilson
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When I press my service brake pedal I have air coming out of
When I press my service brake pedal I have air coming out of the exhaust side of my dash valve. I have replaced my dash valve, treadle valve, relay valve, and I have removed the park hoses from my bra… read more
AMANDEEP MAHERU
AMANDEEP MAHERU
1 satisfied customers
When the parking brake is applied, if I push on the foot
When the parking brake is applied, if I push on the foot pedal air leaks from the trailer protection valve exhaust. … read more
Daniel Wilson
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2012 pro star plus international change foot valve and tp5
2012 pro star plus international change foot valve and tp5 valve still have a problem bleeding air through service glad hand when push pull valve on trailer applied and brake on trailer will lock down… read more
Jeremy
Jeremy
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Associate Degree
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Kenworth T660 serial 221528. Leaking air through valve
Kenworth T660 serial 221528. Leaking air through valve mounted on the driver side below 5th wheel . It supplies air to service side of brake chamber . This one after releasing parking brakes starts bu… read more
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Daniel Wilson
Auto Mechanics 1&2/diesel mech
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Just to make myself clear with the park brakes released then
Just to make myself clear with the park brakes released then applying the foot peddle i have no air leaks but with the park brake on and apply the foot peddle i have air coming out the supply/emerganc… read more
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2011 Freightliner Coronado no air at red glad hand when
2011 Freightliner Coronado no air at red glad hand when trailer valve is pushed in on dash. if red trailer valve is pushed in on dash and you step on brake pedal then air feed out of red glad hand but… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
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1996 western star ,fitted with black brake spring push pull
1996 western star ,fitted with black brake spring push pull valve ,red trailer supply valve , when you release park brakes , air starts releasing from back of park brake valve at dash , have replaced … read more
John Vieira
John Vieira
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I have a 2006 t800 kenworth. The brakes don't seem to work
I have a 2006 t800 kenworth. The brakes don't seem to work as well as I think they should. All drums, linings, slack adjusters, and parking brake canisters are new on the truck. When I apply the brake… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
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my Kenworth 2002 Service brakes wont release when applied.
my Kenworth 2002 Service brakes wont release when applied. it is the same with or without trailers connected the only way to release brakes, is to apply the yellow parking brake then release it. it th… read more
Rudolph Diesel
Rudolph Diesel
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i have a 1998 w900 kenworth with brake ploblem, when you apply
i have a 1998 w900 kenworth with brake ploblem, when you apply the foot valve ,air leaks out the exhuast port of the dash valve, with the brakes released and apply the foot valve the air quits?… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
5,454 satisfied customers
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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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