Construction and Road Equipment

Construction and Road Equipment repair questions? Ask a mechanic ASAP

Ask an Expert,
Get an Answer ASAP!

Construction and Road Equipment

I have problem with my Terex TC25. Its hard to digg with due

Customer Question
Hey, I have problem with...
Hey, I have problem with my Terex TC25.
Its hard to digg with due to it shakes, like Its to high pressure on the hydraulic system.
Submitted: 1 year ago.Category: Construction and Road Equipment
Show More
Show Less
Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
The hydraulic oil and filters are new.
Answered in 5 minutes by:
7/29/2016
Mechanic: Curtis B., Technician replied 1 year ago
Curtis B.
Curtis B., Technician
Category: Construction and Road Equipment
Satisfied Customers: 29,446
Experience: Technican turned service manager with multiple lines of equipment and rental units.
Verified

Does it shake in all functions? Could the pump be sucking ir in on the suction tubes? Or filters plugged, aerating the oil? Do you see any foaming in the hydraulic tank?

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
The most shaking is in the boom cylinder but the problem is worst when combining operations, like turn the machine at the same time I swing the boom in the direction of the cabin.
There is no problem with the blade or tracks.
The oil and filters are new.
Do you know if the stand bye pressure on pump variates with rpm on the motor?
Mechanic: Curtis B., Technician replied 1 year ago

Pressure will always vary from low rpm to maximum. If no aeration of the oil, it is possible that the boom cylinder is binding and is the cause of the jerking.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
The mecanic I have talked to home in Sweden says that the stand bye pressure the pump is giving is to high and thats why i shakes, but they don`t know what causes the high pressure. Do you know that the correct pressure is supose to be on a TC25 ?
Mechanic: Curtis B., Technician replied 1 year ago

No I don't, but stand bye pressure should not affect the dig function, That would be main pressure. Standbye is just the pressure to work the main pump stroke.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
But but its only one hydraulic pump on TC25
Mechanic: Curtis B., Technician replied 1 year ago

yes, but the standbye pressure works the control valve. Then the main pressure becomes factor, not standbye. I will opt out, maybe Dan is around and can help. He is more familiar with this than I am. Sorry. Please do not respond to me or it will lock the question to me.

Ask Your Own Construction and Road Equipment Question
Mechanic: Dan, Technician replied 1 year ago
Dan
Dan, Technician
Category: Construction and Road Equipment
Satisfied Customers: 5,966
Experience: 17+ yrs. shop and field experience with all major brands of heavy equipment and trucks - 1995 WyoTech graduate.
Verified

Hi Jorgen, My name is***** will b e glad to try to help but first what is your complete model and serial number? Just to be sure I look up the correct information. TC25, TC25D, etc?

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
Hello Dan.
Its a Terex TC25 with stelnr TC00250188
Mechanic: Dan, Technician replied 1 year ago

Thanks for the updated information. This is a load sensing variable displacement hydraulic system as I am sure you are already aware so the pump output is always changing based on signal pressure in relation to the demand. If you are getting shaking it is possible due to a return restriction and possibly a pump internal problem. Open up the old filters to inspect internally for any signs of fine metallic glitter in the oil or inside the filter media indicating a pump failure occurring. Click on this link as I found a PDF service book that has all your specs, schematics, and test information for under 10.00 for the proper test procedures on your machine. Once you have downloaded the manual and run through the tests, Let me know the results or if you have found metal in the system.

Troubleshooting Manual

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
Hello Dan.
Sorry for delayed answer, was on jobsite digging yesterday.
The oil and filter was replaced for 50 hours ago when I bought the machine.
I will order new filter and check the old one for metal glitter. I will let you know when I have checked.
I have already the manual, sofar I have messured servo pressure to 32 bar. What I can see on the manual the Servopressure is supose to be 30 bar. I messured att the accumutalor tack, I´m not sure if thats the correct place to messure?
Can you tell me more about "return restriction" What can cause this?RegardsJörgen
Mechanic: Dan, Technician replied 1 year ago

Hi Jorgen, I understand as it is the busy season for me as well and I have been out on the road all this week. Sorry for the delay as well. All components send return oil back to the tank. Follow the schematics and identify the return line back to the hydraulic tank and check it for any restrictions and confirm oil is not getting restricted flow back to the tank causing higher pressure. A cause could be a component failure putting metal in the system, a foreign object left in the system from prior work, etc. If you have the manual in PDF you can gladly share with me and I can look over the diagrams and specs if you need more help . Yo can use a file sharing site and post the link or try to upload using the paperclip icon above. Let me know

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
I`m not sure I can attach the manual, its like 2000 pages :)
I`ll will wait for the new filter to arrive and check the old one for metal glitter.
What I´ve been told the stand bye pressure should be 24 bar. I have messured it to 30 bar at low rpm and 38 bar
at max rpm. could that be an issue?Also the pilot pressure is messured to 32 bar and should be 30 bar according to manual.RegardsJörgen
Mechanic: Dan, Technician replied 1 year ago

Thanks for the update. 2 bar is not much variance and will not create an issue. Let me know what you find in the old filter once opened up for sampling.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
I will.
What about the standbye pressure?
Its supose to be 24 bar but is 38 at full trottle.RegardsJörgen
Mechanic: Dan, Technician replied 1 year ago

Try backing off the pressure with adjusting the relief settings on the relief valves.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
I`m not sure what "Try backing off the pressure" meen? I`m not able to adjust pressure my self so need externial help.RegardsJörgen
Ask Dan Your Own Question
Dan
Dan
Dan, Technician
Category: Construction and Road Equipment
Satisfied Customers: 5,966
5,966 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

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

29,446 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 CAT 279D and the boom is disabled. Give me one
I used the manual and tried several things; the machine got stuck in the mud last week. we got it out but the boom does not work. It shows a symbol indicating the hydraulic system is locked … read more
Curtis B.
Curtis B.
Technician
29,446 satisfied customers
Ex230 has little power to track. Drive motor. Nothing.
Joe JA: What is the complete model and serial number of your machine? Customer: Ex230 has little power to track. Drive motor JA: Are you fixing this yourself? What have you tried so far? Customer: Yes… read more
Curtis B.
Curtis B.
Technician
29,446 satisfied customers
Having problem with s175bobcat controls wont work lights
Having problem with s175bobcat controls wont work lights panel lights come on when I turn key but do not come back on when engine starts it is verry cold here and have snow … read more
Dan
Dan
Technician
5,966 satisfied customers
I have a 926m loader lte03586 it has a e457 code mataince
I have a 926m loader lte03586 it has a e457 code mataince pass due how do I clear the code do u need cat et if so I do have it how do I clear it or reset it maybe tell me how do it on cat et… read more
catmastertech
catmastertech
Field service technician
Vocational, Technical or Trade Scho
1,287 satisfied customers
I have a2016 Bobcat s630 skidsteer that is showing code
I have a2016 Bobcat s630 skidsteer that is showing code MO515 Hydraulic Charge Pressure in shutdown. The hydraulics work normally, moves forward and back but shuts down after running a couple minutes.… read more
Curtis B.
Curtis B.
Technician
29,446 satisfied customers
My in cab heat is blowing cold air. I'm thinking it may be a
my in cab heat is blowing cold air. I'm thinking it may be a thermisat? … read more
catmastertech
catmastertech
Field service technician
Vocational, Technical or Trade Scho
1,287 satisfied customers
I have a question about a Deere 655 crawler loader, probably
I have a question about a John Deere 655 crawler loader, probably B model, 1980's. … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
615 satisfied customers
I have a 1992 Case 580 Super K Construction Backhoe. We are
I have a 1992 Case 580 Super K Construction King Backhoe. We are having trouble priming the injection pump. We prime the low pressure side of the pump, but when we turn the engine over there is no fue… read more
Curtis B.
Curtis B.
Technician
29,446 satisfied customers
My volvo ecr88 ran 6 hours then started to die when the
my volvo ecr88 ran 6 hours then started to die when the hydraulic functions were used . changed fuel filter, had to use ether to get engine to idle up,other wise engine just rough idled and stoped. … read more
Curtis B.
Curtis B.
Technician
29,446 satisfied customers
I have a cat 322bl sn 8nr00291. It will swing left but wont
Hello, I have a cat 322bl sn 8nr00291. It will swing left but wont brake but wont swing right but will brake, I've installed new solenoids front and back on the swing motor and swapped the cross over … read more
Dan
Dan
Technician
5,966 satisfied customers
I have a 11' Bobcat UTV, and having trouble getting it
I have a 11' Bobcat UTV, and having trouble getting it started. Checked battery and it reads 12v, and it has fuel. I don't know where else to look at. It turns over but does not start. Been having pro… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
615 satisfied customers
I have a Deere 450h dozer that won't start. Tested the
Tested the solenoid. It Is getting power from the battery but nothing from the ignition. … read more
Dan
Dan
Technician
5,966 satisfied customers
My problem is on a 330bl cat, the hydraulic shut of
Hi, my name is ***** ***** problem is on a 330bl cat, the hydraulic shut of solenoid , just under the cab, I keep replacing 4 times already, today I checked the wiring at the plug and there is power t… read more
Dan
Dan
Technician
5,966 satisfied customers
Forklift on a yanmar ym155d-165d. Have forklift cannot gat
have forklift cannot gat spool valve becoz noreturn plug yanmar 165d … read more
Curtis B.
Curtis B.
Technician
29,446 satisfied customers
I have 216B Cat skid steer. Travels fine forward and
I have 216B Cat skid steer. Travels fine forward and reverse. When loading on trailer at idle the machine will stop. Rev engine a little then right side moves but left side jerks trying to go. No nois… read more
Dan
Dan
Technician
5,966 satisfied customers
I have a cat 963 loader.code indicator light started
I have a cat 963 loader.code indicator light started flashing and buzzing.retreived codes. most are history codes but one is a component identifier code.machine operates just fine now.recently replace… read more
catmastertech
catmastertech
Field service technician
Vocational, Technical or Trade Scho
1,287 satisfied customers
Need help installing an ignition switch for a bobcat 743
Need help installing an ignition switch for a bobcat 743 serial#50194821 The old style switch is in it, got a new one part number 6 724 282. Not sure where the wires go on the new switch. Any diagrams… read more
Dan
Dan
Technician
5,966 satisfied customers
I have a gehl 5640 e with joystick controls -- when I try to
I have a gehl 5640 e with joystick controls -- when I try to lift the bucket it starts to move then instantly stops I realise the handle and try again the bucket moves up about 1/5" instantly stops ag… read more
Dan
Dan
Technician
5,966 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