Construction and Road Equipment

Construction and road equipment repair questions? Ask a mechanic ASAP

Ask an Expert,
Get an Answer ASAP!

I have a 1997 312B caterpillar excavator. We are having problems…

Customer Question
I have a 1997 312B...
I have a 1997 312B caterpillar excavator. We are having problems with the cooling system. we have changed the rad, water pump, thermostat, rad cap and flush the cooling system with cat's rad flush and changed the air fillers. The hoe has 17000 hrs. on it. What happens is when we start unit and start running the unit on high speed. depending on the outside temp. the temp will hit the top end with in 20 to 30 mins. We taken off the rad cap we can see the fluid circulating freely. There are no bubbles or oil in the coolant. We do not loss coolant. The engine oil is free of coolant. I was wandering if it is possible 1 of the heads could have a crack some were and how we could find out witch head is the problem.
Submitted: 2 years ago.Category: Construction and Road Equipment
Show More
Show Less
Ask Your Own Construction and Road Equipment Question
Answered in 1 hour by:
6/21/2015
Mechanic: catmastertech, Technician replied 2 years ago
catmastertech
catmastertech, Technician
Category: Construction and Road Equipment
Satisfied Customers: 2,497
Experience: Field service technician for CAT 19 years.
Verified
Hello,If your head was cracked, you would build combustion gases in the cooling system and this would cause a coolant loss. Is the air flow through the radiator and oil coolers clear all around the assembly? Are the foam baffles still on the hood and sealing the sides or the radiator?(It is important the air flow is sealed from the engine compartment so that only outside air will enter.)Has the pump loading become excessive? (lugging the engine too much)Does this machine have the high ambient air temperature package? If so, have you replaced the pulleys and v-belts with the correct type parts for high ambient cooling?What is the temperature drop from the outlet to the inlet of the radiator?Please include the full machine serial number with your reply.
Ask Your Own Construction and Road Equipment Question
Was this answer helpful?
Ask Curtis B. Your Own Question
Curtis B.
Curtis B.
Curtis B., Technician
Category: Construction and Road Equipment
Satisfied Customers: 1,382
1,382 Satisfied Customers
Experience: Technican turned service manager with multiple lines of equipment and rental units.

Curtis B. is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

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

1,382 satisfied customers

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

Wayne

Wayne

Journeyman

615 satisfied customers

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

Cat Man

Cat Man

Cat Engine Expert

495 satisfied customers

I am ASE Master Certified.

dieseldan55

dieseldan55

Mechanic

270 satisfied customers

Road Mechanic for Volvo Construction Equipment.

Chris (aka- Moose)

Chris (aka- Moose)

Technician

42 satisfied customers

16 years of experience

Steve

Steve

Mechanic

42 satisfied customers

Heavy Equipment Mechanic for 25 years

JBFixxer

JBFixxer

Mechanic

20 satisfied customers

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

< Previous | Next >

Related Construction and Road Equipment Questions
I have a volvo ec140lc and the controls stopped working.
I have a volvo ec140lc and the controls stopped working … read more
dieseldan55
dieseldan55
Mechanic
Vocational, Technical or Trade Scho
270 satisfied customers
I have a hp-2 warning code on a bobcat 753. What does this
I have a hp-2 warning code on a bobcat 753. What does this code usually indicate? … read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
What tools do I need to replace the steering wheel on a 85d
what tools do I need to replace the steering wheel on a 85d challenger 4gr00806? … read more
catmastertech
catmastertech
Technician
2,497 satisfied customers
Having issues with catC13 (in a 349F)....rear main engine
Having issues with catC13 (in a 349F)....rear main engine seal. Ours went out at 400 hrs , Cat replaced the seal and now out at 1200 hrs again. Apparently they had a bunch of defectives crankshafts up… read more
catmastertech
catmastertech
Technician
2,497 satisfied customers
I have a deere 675b and the up down doesnt work at all
i have a john deere 675b and the up down doesnt work at all suddenly and the tilt works fine … read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
I have a 1968 950 caterpillar loader serial # 81J1162. Where
I have a 1968 950 caterpillar loader serial # 81J1162. Where do we start to replace and adjust the brake shoes? … read more
Curtis B.
Curtis B.
Technician
1,382 satisfied customers
I have allis Chalmers 175 tractor gas engine the problem I'm
I have allis Chalmers 175 tractor gas engine the problem I'm having the engine runs terrible I did a complete tune up plugs condenser cape rotor wires it has miss in it and lose of power any idea what… read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
Can't get the pressure off on the auxiliary connectors so I
Can't get the pressure off on the auxiliary connectors so I can hook up the grapple bucket … read more
Curtis B.
Curtis B.
Technician
1,382 satisfied customers
I have a D5h 1988 model,the steel oil line from the priority
second opinion] I have a D5h 1988 model,the steel oil line from the priority valve to the brake and steering valve seems to have lost its seal where it goes through the transmission case at the brake … read more
catmastertech
catmastertech
Technician
2,497 satisfied customers
The hydraulic coupler won't unlock the attachment pins on my
The hydraulic coupler won't unlock the attachment pins on my New Holland L220 … read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
What type of oil dos the mustang take in the gear box that
what type of oil dos the mustang take in the gear box that driwes the wheals … read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
I have a yutani mdi200ble the left tracks will go for but
hi i have a yutani mdi200ble the left tracks will go for but not backwards … read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
My 455 is blowing 14 amp fuse. when i turn the key to start.
my 455 is blowing 14 amp fuse. when i turn the key to start. any ideas? … read more
Curtis B.
Curtis B.
Technician
1,382 satisfied customers
How to reassemble the unit that has the idle screw on it.
how to reassemble the unit that has the idle screw on it. don't know the name. JD model 216 … read more
Curtis B.
Curtis B.
Technician
1,382 satisfied customers
Someone stole the batteries out of my busy busy MS 240 LC
Someone stole the batteries out of my busy busy MS 240 LC I'm trying to wire the batteries up correctly is 24 V system but I think it's a 12 V lights so I know how to wire the batteries up to make a 2… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
615 satisfied customers
I have a komatsu wheel loader wa 320 is this machine
I have a komatsu wheel loader wa 320 is this machine positive ground I have a main wire from altinater hanging from below starter where does it go?… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
615 satisfied customers
I have a code F9P9. T00315A156801. Fuses. Starts and go
I have a code F9P9 JA: What is the complete model and serial number of your machine? Customer: T00315A156801 JA: Are you fixing this yourself? What have you tried so far? Customer: Fuses JA: Anything … read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
2006 motorhome onfreightliner chassis with cat350hp C7 (i
2006 motorhome onfreightliner chassis with cat350hp C7 (i think) starts fine,runs good started feeling sluggish/low power very slow to get to shift point (allison 6 speed auto) will still do 65 when u… read more
timdieseltech
timdieseltech
diesel tech
Vocational, Technical or Trade School
63 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.

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