Construction and Road Equipment

Construction and road equipment repair questions? Ask a mechanic ASAP

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

This answer was rated:

I have a Case 480F loader that wont stay running more than…

I have a Case 480F...
I have a Case 480F loader that won't stay running more than about 15 seconds. I've replaced the primer pump and bled the injectors. Sometimes, over the 15 seconds or so that it runs, it will idle up and down from about 1000rpm to whatever I set the throttle to, say 1500rpm. Then it acts like it's starving for fuel, chugs a bit then quits. I can often start it right back up and it will run anywhere from 3-15 seconds or so.
Show More
Show Less
Ask Your Own Construction and Road Equipment Question
Answered in 1 hour by:
9/21/2012
Mechanic: Dan, Technician replied 10 years ago
Dan
Dan, Technician
Category: Construction and Road Equipment
Satisfied Customers: 14,855
Experience: 17+ yrs. shop and field experience with all major brands of heavy equipment and trucks - 1995 WyoTech graduate.
Verified

HeavyEquipmentTech :

Hi my name isXXXXX will try to help. Install a clear hose or sight glass between your tank and pump to monitor for air bubbles. Check your lines for restrictions, loose connections, leaks, dry rot or cracking, etc. Any of these could cause the symptoms you mentioned. Try running from a separate fuel container to see if the problem goes away. Then you will know it is either bad fuel lines/filter housing or a restriction in your tank/lines. I hope this helps. Let me know if you need further assistance.

Customer:

I don't think this is it. When I installed the primer pump the tank line ran freely as I tried to capture it in a bucket. Also, the lines are all metal tubes so I don't think it's anything before the fuel filter. There is plenty of fuel getting as far as the filter. It doesn't run long enough to use up all of the fuel in the fuel lines. What symptoms would a clog injector show? Is there any place after the fuel filter where air could be getting in?

HeavyEquipmentTech :

Ok thanks for the update. Check for power at your fuel shut off when this problem occurs to be sure you are not loosing power to your solenoid to hold the pump open for fuel. Also check your return line fitting (check valve) on the pump to be sure it is not plugged with debris as this could cause the shut down you are experiencing. It causes pressure to build inside the pump and kills engine.

Customer:

thanks much. this is just the type of help I was hoping for.

Dan
Dan, Technician
Category: Construction and Road Equipment
Satisfied Customers: 14,855
Experience: 17+ yrs. shop and field experience with all major brands of heavy equipment and trucks - 1995 WyoTech graduate.
Verified
Dan and 87 other Construction and Road Equipment Specialists are ready to help you
Ask your own question now
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Dan Your Own Question
Dan
Dan
Dan, Technician
Category: Construction and Road Equipment
Satisfied Customers: 14,855
14,855 Satisfied Customers
Experience: 17+ yrs. shop and field experience with all major brands of heavy equipment and trucks - 1995 WyoTech graduate.

Dan is online now

Related Construction and Road Equipment Questions
I have a cat 287d skidstrr that you have to give a lot of
Hey I have a cat 287d skidstrr that you have to give a lot of throttle for it to move ( track forward or backwards) how ever the loader functions work great. Wondering if the pump is on its way out? I… read more
catmastertech
catmastertech
Field service technician
Vocational, Technical or Trade Scho
1,325 satisfied customers
Not sure how this webiste works, but will give it a try. I
Hey, not sure how this webiste works, but will give it a try. I have an '83 JD 310B backhoe, that turns over but doesn't start. I was trying to bleed the lines, but the fuel primer lever doesn't seem … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
1,298 satisfied customers
My 317 Deere skid steere keeps getting air locked at hand
My 317 John Deere skid steere keeps getting air locked at hand pump … read more
Curtis B.
Curtis B.
Technician
Associate Degree
2,324 satisfied customers
I have a Volvo ec240bl s/n 10081. I drained the fuel tank,
Hello, I have a Volvo ec240bl s/n 10081. I drained the fuel tank, and let the engine run out of fuel, so I can tell when it was empty. Seemed like a reasonable thought at the time. I installed fuel sh… read more
Heavy Equipment Tech
Heavy Equipment Tech
Heavy equipment mechanic
158 satisfied customers
I have a Cat D5M-XL that has started randomly powering down
I have a Cat D5M-XL that has started randomly powering down after the engine gets heated up. As soon as you press the decelerator and let off it powers right back up. Its almost like its starving for … read more
Heavy Equipment Tech
Heavy Equipment Tech
Heavy equipment mechanic
158 satisfied customers
I've got a 1999 cat 953c with a 3116. It has air in the fuel
I've got a 1999 cat 953c with a 3116. It has air in the fuel system. It appears I'd have to remove the valve cover to get the the injector lines. Is there another way to bleed the system? … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
591 satisfied customers
Case 1845C starts and idles normally. Full throttle engine
Case 1845C starts and idles normally. Full throttle engine spits and sputters , excessive white smoke. New fuel filter. Ran a line directly to primer pump into a bucket of clean fuel. Same problem. I … read more
Curtis B.
Curtis B.
Technician
Associate Degree
2,324 satisfied customers
My takeuchi TB175 stalls and dies after about 2 to 3 minutes
my takeuchi TB175 stalls and dies after about 2 to 3 minutes of operation the will restart and run for another couple minutes.. Ive changed everything i know to possible change. whats wrong? … read more
Curtis B.
Curtis B.
Technician
Associate Degree
2,324 satisfied customers
I�m having a lot of trouble with my 3116 cat motor it is the
Second opinion] I�m having a lot of trouble with my 3116 cat motor it is the industrial motor in a caterpillar 953 crawler when you started up it runs fine lots of power doesn�t miss a beat within 10 … read more
Dan
Dan
Technician
Auto Mechanics 1&2/diesel mech
14,855 satisfied customers
I have a bobcat s630 that starts and runs but just stalls
I have a bobcat s630 that starts and runs but just stalls out, like it is not getting fuel. I replaced the fuel filter and it still s stalls out. If I drive it in Idle its fine. But if i crank itup it… read more
Fieldtech59
Fieldtech59
416 satisfied customers
My 3116 mechanical starts and runs slowly andd smokes light
Second opinion] My 3116 mechanical starts and runs slowly andd smokes light blue for about 10 second then quits and won't fire again unless sitting for a while. Acts flooded? Is that possible? Steppin… read more
Curtis B.
Curtis B.
Technician
Associate Degree
2,324 satisfied customers
I have a 1995 cat 3406e motor that started out with a lack
I have a 1995 cat 3406e motor that started out with a lack of fuel changed the fuel lines the filter and the bleeder valve. Would run fine for a while then under a load would act like it is starving f… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
578 satisfied customers
I have a CASE 570 XLT Series 2 loader. I recently started it
I have a CASE 570 XLT Series 2 loader. I recently started it and let it idle for several minutes (prior to this it was running fine). After running about 4 minutes it all of a sudden died, slowly ... … read more
Curtis B.
Curtis B.
Technician
Associate Degree
2,324 satisfied customers
Massey Ferguson MF30 industrial tractor...replaced fuel filters and a cracked return line
Massey Ferguson MF30 industrial tractor...replaced fuel filters and a cracked return line from injection pump. Bled system and finally got running but not reving properly and then eventually died whil… read more
Curtis B.
Curtis B.
Technician
Associate Degree
2,324 satisfied customers
I have a 35c Deere excavator that started to act up. It starts
I have a 35c Deere excavator that started to act up. It starts up fine but when you pull the throttle to rev up it sputters and wands to die but it doesn't. I changed all the fuel filters and fuel pum… read more
Curtis B.
Curtis B.
Technician
Associate Degree
2,324 satisfied customers
2005 bobcat s130 runs for about 1 hour then slowly dies. Let
2005 bobcat s130 runs for about 1 hour then slowly dies. Let it sit for a half hour and it will run for about 5 minutes. Its been doing this for several years. It is used at full throttle. Last time a… read more
Fieldtech59
Fieldtech59
416 satisfied customers
I recently purchased a 1989 John Deere 410c backhoe loader.
I recently purchased a 1989 John Deere 410c backhoe loader. It ran like a charm for about 2 months, but started acting like it was not getting fuel. This happened during the progression of perhaps 2 d… read more
Dan
Dan
Technician
Auto Mechanics 1&2/diesel mech
14,855 satisfied customers
We have a komatsupc50uu that I ran out of fuel. I refuelled
We have a komatsupc50uu that I ran out of fuel. I refuelled it, bled the lines but it won't restart.… read more
Curtis B.
Curtis B.
Technician
Associate Degree
2,324 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:

Curtis B.

Curtis B.

Technician

2,324 satisfied customers

Technican turned service manager with multiple lines of equipment and rental units.

Wayne

Wayne

Journeyman

1,298 satisfied customers

worked on many road graders, Bull dozers , skid steers, Rollers

Cat Man

Cat Man

Cat Engine Expert

578 satisfied customers

I am ASE Master Certified.

dieseldan55

dieseldan55

Mechanic

299 satisfied customers

Road Mechanic for Volvo Construction Equipment.

Chris (aka- Moose)

Chris (aka- Moose)

Technician

85 satisfied customers

24 years of experience diagnosing & repairing

Steve

Steve

Mechanic

42 satisfied customers

Heavy Equipment Mechanic for 25 years

JBFixxer

JBFixxer

Mechanic

22 satisfied customers

16+ years experience, hydraulics,hydrostatics, engines, fuel injection systems. And everything in between.

< 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