Medium and Heavy Trucks

Have truck repair questions? Ask an Expert

Connect one-on-one with {0} who will answer your question

Related Medium and Heavy Trucks Questions
I have a 2006 freightliner think fl70 with c7 cat. Had a/c
Hello, I have a 2006 freightliner think fl70 with c7 cat. Had a/c compressor and drier replaced, but engine fan doesn't cycle with a/c on. … read more
Bradey V
Bradey V
Certificate
2014 freightliner cascadia dd15 fan clutch stays engaged all
2014 freightliner cascadia dd15 fan clutch stays engaged all the time .. already replaced solenoid… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
Question for the cat man. I have c-15 cat the fan stays on
Question for the cat man. I have c-15 cat the fan stays on only getting 11.1v I put 12v and ground to fan solenoid. Fan solenoid works. I then did a contanuaty test on positive side wire from ecm plug… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,244 satisfied customers
WE HAVE A 2007 FREIGHTLINER COLUMBIA WITH A CAT C15 ENGINE,
WE HAVE A 2007 FREIGHTLINER COLUMBIA WITH A CAT C15 ENGINE, VIN IS 7LV91957. THE ENGINE FAN RUNS ALL THE TIME, LOOKING INTO THE ENGINE ECM THE FAN SHOULD BE OFF. WE FOUND THE AIR SOLINIOD VALVE BAD. W… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
Air clutch will not engage. 2007 frightliner m2 engine model
yes i am. I have found no air going to clutch so far is this free?… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
I'am working on a 2006 Peterbilt truck with a CAT engine.
Hi, I'am working on a 2006 Peterbilt truck with a CAT engine. the engine serial number is ***** The engine fan is stuck on all the time. The fan clutch uses air to disengage.I manually put air to the … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,244 satisfied customers
2003 western star with a c-15 cat. engine fan runs
2003 western star with a c-15 cat. engine fan runs continuously. only 2.5 volts at fan solenoid it works properly when 12 volts are supplied manually. ecu is commanding fan on. new high pressure trans… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,244 satisfied customers
My fan clutch on a c13 engine is staying on. I have 11 volts
My fan clutch on a c13 engine is staying on. I have 11 volts at fan control solenoid. I connected fan supply air line to the air line going to fan clutch. It disengages then. It is the fan control sol… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,244 satisfied customers
Working on a 3406e 5ek in 1996 379 pete, eng fan running all
working on a 3406e 5ek in 1996 379 pete, eng fan running all the time, check wiring and fuses and relays all seem to b ok, on the plug that goes on the manual o/r switch in cab all the wires are hot i… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,244 satisfied customers
I'm thinking my fan clutch is seized on my 2004 intl 4400
I'm thinking my fan clutch is seized on my 2004 intl 4400 with dt530. It never free wheels, hot or cold, and the serpentine belt slips at higher rpm. The fan clutch has air tube … read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
207 satisfied customers
The fan doesnt come on with jakes or when engine temp is hot
the fan doesnt come on with jakes or when engine temp is hot in our 1998 peterbilt 378 with a 3406e … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,244 satisfied customers
Cat Man, I have a SDP12176 That the engine fan is on all the
Cat Man, I have a SDP12176 That the engine fan is on all the time. I checked the config settings and found that the parameters are all screwed up. It has a manual fan switch but is programmed that it … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,244 satisfied customers
I have a 2007 freightliner m2 with mercedes 330 hp engine.
i have a 2007 freightliner m2 with mercedes 330 hp engine. The fan clutch engages around 205 degrees and cools down to 190 degrees but does not shut off. the clutch fan stays engaged. any ideas?… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I have a 99 Freightliner FL 70 with a 3126 Cat. The engine
I have a 99 Freightliner FL 70 with a 3126 Cat. The engine cooling fan stays on all the time. Took it off and tested the air clutch as borking fine. Any ideas what to look at next? Thanks… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,244 satisfied customers
there I have a 2004 international 4400 with a dt530 the
hi there I have a 2004 international 4400 with a dt530 the air clutch fan stays engaged all the time. I have power to the solenoid but no ground when I ground solenoid clutch fan disengages. The coola… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
207 satisfied customers
2001 freightliner century with cummins N14, engine fan is constantly
2001 freightliner century with cummins N14, engine fan is constantly running. Have already replaced the ac high pressure switch and the fan clutch solenoid.… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
207 satisfied customers
installed water pump on mbe4000 Mercedes engine 2007 Columbia
installed water pump on mbe4000 Mercedes engine 2007 Columbia now engine fan stays on. why… read more
Clayton
Clayton
Technician
Vocational, Technical or Trade Scho
627 satisfied customers
Freightliner Century 2001 Detroit 60 Code: ENG. Auxout. Driver2.
Freightliner Century 2001 Detroit 60 Code: ENG. Auxout. Driver2. Short. Hi 128s040.03 any idea what that would be?… read more
Buddy
Buddy
Diesel Technician
High School or GED
703 satisfied customers
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.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Daniel Wilson

Daniel Wilson

4,737 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

10,244 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

4,023 satisfied customers

worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling

Jeremy

Jeremy

Certified Truck/Bus Technician

2,740 satisfied customers

ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications

cumminsdr

cumminsdr

Mechanic

1,700 satisfied customers

All types of Cummins applications

Curtis B.

Curtis B.

Technician

1,571 satisfied customers

Technician turned service manager on multiple lines of trucks and engines, used in industry.

Chris (aka-Moose)

Chris (aka-Moose)

Technician

353 satisfied customers

24 years of experience diagnosing & repairing

< Previous | Next >

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.

Show MoreShow Less

Ask Your Question

x