Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
Air continuously leaking from the air dryer purge valve when
Air continuously leaking from the air dryer purge valve when compressor has unloaded, when the brake pedal is pressed it seems to stop. The air dryer, compressor and governor have been replaced ......… read more
Mike
Mike
Shop Foreman/Triage Tech
Associates
2,797 satisfied customers
I'm having with air pressure on a 379 Pete with vin #
I'm having with air pressure on a 379 Pete with vin # ***************** it's only building 90 psi on primary side no air leaks and I have tried a new compressor, still 90 psi no secondary at all no ai… read more
Mike
Mike
Shop Foreman/Triage Tech
Associates
2,797 satisfied customers
Secondary air pump wont fill primary is filling. 2007
Tried air antifreeze, heat, it was tarped in and heated. Primary is working fine secondary wont kick in… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
203 satisfied customers
45 here. Last sat had truck towed to a shop. Release valve
45 here. Last sat had truck towed to a shop. Release valve on compressor continually popping. Shop opened up supply line poured antifreeze into it and blew out everything. No moisture came out of tank… read more
Roy
Roy
shop foreman
Associate Degree
5,399 satisfied customers
Broke the plastic air line fitting we're it connects to the
Broke the plastic air line fitting we're it connects to the dryer the line goes back to one of the air tanks. Do I need to replace the whole hoes or can I cut it at the connection and splice it? … read more
Mike
Mike
Shop Foreman/Triage Tech
Associates
2,797 satisfied customers
Air dryer started purging every minute and a half or so. No
Air dryer started purging every minute and a half or so. No loss in pressure. Swapped the air dryer and new governor. Started doing that I'm very cold weather. Still doing the same thing after new par… read more
Don
Don
fleet superintendent
Vocational, Technical or Trade Scho
1,631 satisfied customers
Have a 2011 volvo class A semi with detroit DD15 engine.
Have a 2011 volvo class A semi with detroit DD15 engine. Extremely cold "0" degrees. Brakes were froze and thawed them. But, now air is continuously blowing out of bottom of air drier, not purging but… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
3,400 satisfied customers
HAVE A 86' MC686FC MACK TRUCK. AIR BRAKE PRESSURE BUILDS
HAVE A 86' MC686FC MACK TRUCK. AIR BRAKE PRESSURE BUILDS ERRATICLY. BEFORE AIR PRESSURE STARTS TO BUILD AIR WILL SPUTTER 3 TIMES OUT OF SAFETY VALVE ON AIR DRYER,THEN AIR WILL BUILD.I HAVE REPLACED GO… read more
Don
Don
fleet superintendent
Vocational, Technical or Trade Scho
1,631 satisfied customers
Don't answer this question unless you are very knowledgeable
Please don't answer this question unless you are very knowledgeable on this issue. How does one get a semi air brakes that froze up thawed in the field?… read more
Alex Olsen
Alex Olsen
auto/diesel/industrial
524 satisfied customers
This truck came in with a single air dryer having air
Hello this truck came in with a single air dryer having air charging problems with purge valve and oil . I ran the vin and saw that this truck comes with the dual air dryer, I began the install with t… read more
][\][iCk0411
][\][iCk0411
Fleet Warranty Manager
Vocational, Technical or Trade School
5 satisfied customers
MY SPLITTER ON MY 13 SPEED STOPPED WORKING TODAY ALL AT ONCE
MY SPLITTER ON MY 13 SPEED STOPPED WORKING TODAY ALL AT ONCE COULD IT BE COLD WEATHER … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
3,632 satisfied customers
1994 international 4900. we have been having severe problems
1994 international 4900. we have been having severe problems with the air freezing up on it and we want to bypass the air dryer. what are the ramifications of bypassing the unit? I would much rather s… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
3,400 satisfied customers
we are having problems with some of our trucks air lines
we are having problems with some of our trucks air lines freezing. We have instituted a protocol to drain their tanks everynight but it is still happening. Any tips or tricks?… read more
tkman55
tkman55
Shop manager Trailer Refrigeration shop
138 satisfied customers
Volvo vn 670: my trailer brakes are frozen. I pumped the service
my trailer brakes are frozen. I pumped the service brake to see if that would help. Now My air pressure won't build… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
203 satisfied customers
We have a 1996 Volvo Semi Tractor w/M11+ motor. The tractors
We have a 1996 Volvo Semi Tractor w/M11+ motor. The tractors air suspension lines froze today (extreme cold) and with out warming it it just broke loose and worked fine an hour later. 1. How can we te… read more
Toby
Toby
Vocational, Technical or Trade Scho
107 satisfied customers
I have a 2004 Pete 387 with a cummins ISX, Where is the air
I have a 2004 Pete 387 with a cummins ISX, Where is the air dryer located? I parked it and now it will not build any air. The compressor appears to be working.And I bought a new gonernor. But can't fi… read more
Jim
Jim
Diesel tech.
212 satisfied customers
Volvo 670: can i operate my truck without an air dryer? my
can i operate my truck without an air dryer? my air dryer sneezes every 20 seconds & i would like to know if I can bypass it until I can replace it… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
3,400 satisfied customers
LTL 9000Ford: i HAVE FORD QUAD AXLE DUMP TRUCK. AIR DRYER BRACKET
i HAVE FORD QUAD AXLE DUMP TRUCK. AIR DRYER BRACKET BROKE. DRYER WAS HANGING FROM AIR HOSES. I WELDED BRACKET & INSTALLED DRYER. AFTER THAT PRESSURE WOULD BUILD UP TO 120 P S I AND DRYER WOULD RELIEVE… read more
Jim
Jim
Diesel tech.
212 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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