Construction and Road Equipment

Construction and road equipment repair questions? Ask a mechanic ASAP

Ask an Expert,
Get an Answer ASAP!

312B the hydraulic safety will click on while operating, i…

Customer Question
312B the hydraulic safety will...
312B the hydraulic safety will click on while operating, i have ruled out the micro switch, and have located the small black relay in elec. panel. that is clicking, not sure what or where to check next.
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:
2/25/2016
Mechanic: catmastertech, Technician replied 2 years ago
catmastertech
catmastertech, Technician
Category: Construction and Road Equipment
Satisfied Customers: 2,578
Experience: Field service technician for CAT 19 years.
Verified

Hello,

Please post the full machine serial number so I can research the correct information about this machine.

Are you saying the lock will click when you move the safety lever? (This is the correct function)

Or are you saying it is turning off and the machine is stopping?

Is the charging system working?

Are your batteries testing good?

Have you checked for voltage at the lockout solenoid?

Please provide more details about what is happening to the machine?

Ask Your Own Construction and Road Equipment Question
Customer reply replied 2 years ago
Thanks for reply , what should I look for first . I own a starter & Alternator rebuilding shop. I am sure alt is 28+ . Batts at 90+% cranking amps. I need to know what the path from micro switch to pilot release is .. At least I think 😁
Mechanic: catmastertech, Technician replied 2 years ago

At switch,

Red #150 wire is power from hydraulic lock fuse.
Green #151 wire goes to hydraulic lock relay.
Red #154 wire goes to neutral start relay.

From hydraulic lock relay,

Green #A588 wire goes to hydraulic lock solenoid.
Power to relay is from the same fuse and wire. (Red #150)

Black #200 wires are grounds.

Ask Your Own Construction and Road Equipment Question
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 catmastertech Your Own Question
catmastertech
catmastertech
catmastertech, Technician
Category: Construction and Road Equipment
Satisfied Customers: 2,578
2,578 Satisfied Customers
Experience: Field service technician for CAT 19 years.

catmastertech 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

1,409 satisfied customers

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

Wayne

Wayne

Journeyman

650 satisfied customers

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

Cat Man

Cat Man

Cat Engine Expert

517 satisfied customers

I am ASE Master Certified.

dieseldan55

dieseldan55

Mechanic

273 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
Have a 5640 turbo skid steer, about 5 yr old, have been
Have a 5640 turbo skid steer, about 5 yr old, have been using it, but now it will not start, It seems maybe the safety bar is not connecting? A few days ago it did the same thing but put the bar down … read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
I have a JCB 1110T,It will not move and loader arm will not
I have a JCB 1110T,It will not move and loader arm will not move also. Have checked all fuses and safety bar switch,all good.Not sure what to look for as my service manual does not tell me anything ab… read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
I have a 2005 case 40xt skid loader. it moves but loader
I have a 2005 case 40xt skid loader. it moves but loader controls don't work as if the a safety switch is on. then sometimes they will work most of the time not. … read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,409 satisfied customers
Pc78us-6 LOST ALL HYDRAULIC functions this problem is
Pc78us-6 LOST ALL HYDRAULIC functions this problem is irratic checked micro safety switch At times system works fine after you shut machine down sometimes all hydraulic functions inoperable… read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
2007 TB 175 PILOT CONTROLS QUIT RESPONDING BLADE WILL RAISE
2007 TB 175 PILOT CONTROLS QUIT RESPONDING BLADE WILL RAISE AND LOWER BUT BOOM WILL NOT OPERATE… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
650 satisfied customers
I have a 2003 caterpillar skid steer 3034, and I had the engine
I have a 2003 caterpillar skid steer 3034, and I had the engine rebuilt. after installing the engine,I cant jet the starter to engage.I checked the starter and its good. But I'm trying to find out If … read more
Bradley Martin
Bradley Martin
16 satisfied customers
I have cat 303 and have intermittent electric problem seems
I have cat 303 and have intermittent electric problem seems the machine controls stop working when I'm in travel mode actually all the controls stop ,yes the lever does flip up from time to time howev… read more
Bradley Martin
Bradley Martin
16 satisfied customers
Mustang(model 2050, ~ yr 2005,1700 hrs) skid steer engine
mustang(model 2050, ~ yr 2005,1700 hrs) skid steer engine quits at idle(or advanced throttle). it only continues running if the start key is held in "start" position. As soon as key is released from s… read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
I have a cat 301.4c excavator that reason wont start. like a
hello I have a cat 301.4c excavator that for some reason wont start. like a safety is not allowing it to start. I changed altinator and rectifier in it now it wont crank. at koeo I hear a buzzer and t… read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
I have a case 435 that will not move in forward reverse the
I have a case 435 that will not move in forward reverse the levers move but the controls are locked so i can not operate the bucket. When it first started i could move the machine but not operate the … read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
I have a caterpillar 322b excavator in periodically all the
I have a caterpillar 322b excavator in periodically all the hydraulics shut down until I shut it off and let it cool for 10 minutes then it will operate normally until something kicks out again is the… read more
catmastertech
catmastertech
Technician
Vocational, Technical or Trade Scho
2,578 satisfied customers
I have a 420e backhoe stabilizers and bucket do not work
I have a 420e backhoe stabilizers and bucket do not work nothing happens when you move the controls… read more
catmastertech
catmastertech
Technician
Vocational, Technical or Trade Scho
2,578 satisfied customers
I have a Komatsu sk1020-5. When I lower the lap bar and then
I have a Komatsu sk1020-5. When I lower the lap bar and then flip the switch I see the green symbols that the controls are activated. I checked the fuse panel but all fuses seem OK. Is there any other… read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
I have a 2005 New Holland LT 185 skid steer. The engine
I have a 2005 New Holland LT 185 B skid steer. The engine turns over while trying to start but does not start. I've replaced the fuel filter and bleed the filter but it still will not start. My guess … read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
I have a cat 312b engine runs perfect, but no power going to
I have a cat 312b engine runs perfect, but no power going to hydraulic safety switch. machine doesn't function. also engine has to be jump started at solenoid. throttle cables don't work.… read more
catmastertech
catmastertech
Technician
Vocational, Technical or Trade Scho
2,578 satisfied customers
Hi Just bee browsing trying to find answers to a problem
Hi Just bee browsing trying to find answers to a problem with volvo ec15b 2003 model a couple of times it hasn't stopped when turning the key off, and just now it has lost power, i stopped it. now it … read more
dieseldan55
dieseldan55
Mechanic
Vocational, Technical or Trade Scho
273 satisfied customers
My New Holland LT 185.B SN#N5M416127 has locked the hydraulics
My New Holland LT 185.B SN#N5M416127 has locked the hydraulics on the brakes and cylinders. The engine runs but the parking brake will not release. I have bypassed the seat belt circuit, tried a new i… read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,409 satisfied customers
Need help on repairs to Samsung hydraulic excavator Model #240SE
Need help on repairs to Samsung hydraulic excavator Model #240SE Series LC3. Working fine one day. Next day no movement in tracks, boom, bucket, dipperstick, and swing... as if the limit switch on lef… read more
dieseldan55
dieseldan55
Mechanic
Vocational, Technical or Trade Scho
273 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