Medium and Heavy Trucks

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I have cgp25 topped off all fluids and it won't go forward
I have Clark cgp25 topped off all fluids and it won't go forward or backward feels like it's trying too checked parking brake switches with meter … read more
Curtis B.
Curtis B.
Technician
Associate Degree
39,225 satisfied customers
We bought a school bus from an auction a few months back.
Hello! We bought a school bus from an auction a few months back. Other than needing an alternator, it drove home like a rocket no problem. It has an Allison AT545 transmission and lately it's been act… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I borrowed a 416c that worked great. I used it 4 days, 6-7
I borrowed a 416c that worked great. I used it 4 days, 6-7 hours a day. The owner came over to pick it up and it would not move. Shifting between forward and reverse did noting. Occasionally, it will … read more
catmastertech
catmastertech
Field service technician
Vocational, Technical or Trade Scho
1,307 satisfied customers
I have a Komatsu FD40ZT-8 Curtis, it use to rain and
I have a Komatsu FD40ZT-8 Curtis, it use to rain and naturally it would get wet and wouldn't go forward or reverse, but run fine, last week it did the same symptoms on a good sunny day, any ideas, I a… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
The smoke started coming from ENGINE INTAKE FILTER, removed
The smoke started coming from ENGINE INTAKE FILTER, removed the egr pipe and found fuel inside the egd … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
It is showing several fault codes on being link 1939. 2000
it is showing several fault codes on being link 1939 … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
430 satisfied customers
Transmission. Today. 2000 freight liner Allison transmission
Alison transmission JA: When was your transmission fluid last checked? Customer: Today JA: What is the make/model/year of your transmissions? Customer: 2000 freight liner Allison transmission JA: Are … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
Truck Vin H72526 cummins ism air compressor part number..
Truck Vin H72526 cummins ism air compressor part number.. problem started a couple days ago..truck would build way too much pressure 140+ psi. I changed the governor out and it built and stayed perfec… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
430 satisfied customers
Stuck in foward. H50 xl a177b34388k va577530. Have pulled
have pulled the top plate cant find anything wrong the two pressure ports at the inching spool are around 95-100 cant reall tell because it tries to go forward only will not reverse each spool has pressure till I shift the other direction then it goes to 0 so I drained the oil out it don't look too good brown with some metal pull out the screen had a few little black pices the lift will still try to go forward will all the oil drained out I guess it done … read more
Curtis B.
Curtis B.
Technician
Associate Degree
39,225 satisfied customers
I have an 86 Caterpillar 931B trackloader. It isn't used a
I have an 86 Caterpillar 931B trackloader. It isn't used a whole lot. Recently I ran it and after about an hour, it stopped pulling. It was steering fine. Engine running fine, etc. I had not changed t… read more
catmastertech
catmastertech
Field service technician
Vocational, Technical or Trade Scho
1,307 satisfied customers
I have a 2000 International 4700 with a DT 466. The truck
Hi, I have a 2000 International 4700 with a DT 466. The truck starts and runs fine as I use it every day. It will start and run fine if it sits for 4 days. If I leave it 5 or 6 days it will start, beg… read more
Curtis B.
Curtis B.
Technician
Associate Degree
39,225 satisfied customers
2000 model Freightliner FL 70 with cat engine and first
2000 model Freightliner FL 70 with cat engine and first generation Eaton fuller six speed auto ship tranny … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
I have an 07 vnl780 with an ISX. I recently, out of the blue
I have an 07 vnl780 with an ISX. I recently, out of the blue started having trouble being legal on my steer axle weight. Spec weight is 10900 lbs (bobtail). My steer axle weight is 11700 lbs with tank… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
I am having trouble with my cruise control not always working
Hi I am having trouble with my cruise control not always working on my 1999 international 4700. It works most of the time but once and a while it won't work at all. I'm just useing it to ramp up idle … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
C12 1YN11287 Truck has a flutter/miss/ grey smoke revving
C12 1YN11287 Truck has a flutter/miss/white grey smoke revving thru the gears or sitting still. Doesn't do it all the time. But acts up most of the time.… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
yes I have a 2011 QSB with no codes will not start. have 350
yes I have a 2011 QSB with no codes will not start. have 350 rmp while cranking 7500 lbs of fuel pressure cranking. no air in fuel system. engine start of a spit second then dies. if you continue to c… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,700 satisfied customers
in my ms3 midliner, when the oil pressure drops below 30, I
in my ms3 midliner, when the oil pressure drops below 30, I hear a tapping sound. Probably a rod bearing. I bought the truck used, 1997 Mack, 178,000 miles. This started when i changed the oil and add… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
Have 13 speed xmsn. Have had clutch adjustments done over past 2 yrs.
Have 13 speed xmsn. Have had clutch adjustments done over past 2 yrs. Recently had Peterbilt do adj which they said they did to spec. Noticed upon leaving that the truck seemed to move faster, earlier… read more
Clayton
Clayton
Technician
Vocational, Technical or Trade Scho
627 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

4,737 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

5,234 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

39,225 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

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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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