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

Have 740 throwing a 2742-6 code, 2L700338 cat 730-2, yes and…

Customer Question
Have 740 throwing a...

Have 740 throwing a 2742-6 code

Mechanic's Assistant: What is the complete model and serial number of your machine?

2L700338 cat 730-2

Mechanic's Assistant: Are you fixing this yourself? What have you tried so far?

Yes and swapped solinoides checked fluid

Mechanic's Assistant: Is there anything else the Construction Mechanic should know before I connect you? Rest assured that they'll be able to help you.

Made sure there was no broken wires ect

Submitted: 1 year ago.Category: Construction and Road Equipment
Show More
Show Less
Ask Your Own Construction and Road Equipment Question
Answered in 2 minutes by:
10/26/2021
Mechanic: catmastertech, Technician replied 1 year ago
catmastertech
catmastertech, Technician
Category: Construction and Road Equipment
Satisfied Customers: 4,043
Experience: Field service technician for CAT 19 years.
Verified

Hello,

Have you tried leaving the connector disconnected to see if the code becomes a -5 for an open circuit?

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
Yeah it does do thatDo you want me to ring you?
Mechanic: catmastertech, Technician replied 1 year ago

Did you take an ohm reading of the old coil and the new coil?

Sorry, I am not setup for phone calls.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
I haven’t put a new coil on I just switched one and another to see if the code moved but it doesn’tAll good it just came up haha I can’t reply to texts
Mechanic: catmastertech, Technician replied 1 year ago

Its automatic and I can't get the admin to turn it off.

Your posts are coming in fine.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
Okay sweet as haha
Mechanic: catmastertech, Technician replied 1 year ago

Have you had this problem listed below?

PROBLEM

The existing Parking Brake Solenoid Valve (424-2272 Solenoid Valve) and Brake Accumulator Charge Solenoid valve (424-2272 Solenoid Valve) can fail on certain 725C 2, 730, 730 EJ, 730C 2, 730C 2 EJ, 735, 740 EJ, 740GC AND 745 Articulated Trucks. If the existing Parking Brake Solenoid Valve and Brake Accumulator Charge Solenoid valve fails it can lead to the Parking Brake not releasing or low charge pressure on the Brake Accumulator Charge Valve.

Ask Your Own Construction and Road Equipment Question
Mechanic: catmastertech, Technician replied 1 year ago

It does not say it causes this code though.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
both those can fail because I swapped those to coils over and it seems to be only throwing the 2742-6 code the park brakes working fine and it throws the code randomly
Mechanic: catmastertech, Technician replied 1 year ago

Here is the resistance the ECM is expecting for the circuit +/- 1 ohm.

Resistance at 20 °C (68 °F) is 41.74 ± 4.20 ohms.

It seems that the code did not move, the wiring for that circuit must have a poor connection somewhere.

Have you checked the resistance on the circuit from the ECM?

The blue wire marked C881 is connected to the ECM on the J2 connector at pin 3.

The white wire is next to it at pin 4 and marked G859.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
Yeah and tou want resistance on the C881 wire
Mechanic: catmastertech, Technician replied 1 year ago

You can test it with nothing connected to see if it is shorted to the frame. and then install a jumper wire at the solenoid to test the total reistance of both wires. Nomally, it should be less than 2 ohms.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
The coil is extremely hot aye
Mechanic: catmastertech, Technician replied 1 year ago

You should be testing with the key off.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
Yeah I am but I was just doing ET tests ect and it got hot over that time
Mechanic: catmastertech, Technician replied 1 year ago

ok, just didn't want you to create more codes.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
Yeah nah I’ve been watching what codes are getting made okay so jump across at the white and blue wire at the plug of the solinoide
Mechanic: catmastertech, Technician replied 1 year ago

Yes

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
It says 045.6 ohms
Mechanic: catmastertech, Technician replied 1 year ago

Are you sure you are on the correct connector? Verify the wire colors and numbers if possible.

That reading would be good if the solenoid is still connected.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
Yeah I’m on the right wires and have the solenoid connected
Mechanic: catmastertech, Technician replied 1 year ago

Disconnected it and check the blue wire for a short to ground.

White wire is shared with other solenoids.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
No shorts to earth from the blue wire
Mechanic: catmastertech, Technician replied 1 year ago

Connect the J2 to the ECM and the solenoid then Check If The Diagnostic Code Remains
A. Turn the key start switch and the disconnect switch ON.
B. Clear all diagnostic codes.
C. Operate the machine.
D. Stop the machine and engage the safety lock lever.
E. Check if diagnostic code for the solenoid is active.

If all is OK - The diagnostic code does not exist at this time. The initial diagnostic code may have been caused by poor electrical connection or short at one of the harness connections. Resume machine operation.

If all is NOT OK - The diagnostic trouble code has not been corrected. If the diagnostic code has not been corrected after performing the procedure a second time, the ECM may require replacement.
Prior to replacing the ECM, contact the Technical Communication at your dealership for possible consultation with Caterpillar. This consultation may greatly reduce repair time.

Ask Your Own Construction and Road Equipment Question
Mechanic: catmastertech, Technician replied 1 year ago

I have searched through old record that I can access but, I do not find anything else for this code. Your dealer may need to contact CAT to see if they know of any other issues before you have the ECM replaced.

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: 4,043
4,043 Satisfied Customers
Experience: Field service technician for CAT 19 years.

catmastertech is online now

Related Construction and Road Equipment Questions
I have a D3K2xl dozer, during regular whilst reversing the
I have a D3K2xl dozer, during regular whilst reversing the park brake will come on it will then release and and operate normally … read more
PAPA Chris
PAPA Chris
Field Service Technician
Automotive Technology
46 satisfied customers
297 c lift arms start up but stops turn key off then back on
297 c lift arms start up but stops turn key off then back on does same thing … read more
catmastertech
catmastertech
Technician
Vocational, Technical or Trade Scho
4,043 satisfied customers
I have a 730 bobcat all new drive motors and new hydraulic
I have a 730 bobcat all new drive motors and new hydraulic pump it goes forward but while moving forward it will start reversing … read more
Curtis B.
Curtis B.
Technician
Associate Degree
2,324 satisfied customers
Looking for the main power relay in cat 926m. LTE04649.
Yes fixing it myself. Clicking noise behind fuse panel took The panel off to look behind it and everything looks ok. There is a code for main power relay. Machine turns on but no lights no wipers no ac … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
1,298 satisfied customers
563c cat cutter code says can bus A. Runs great for 3 hours
563c cat cutter code says can bus A . Runs great for 3 hours then does nothing but idle … read more
RichardH416
RichardH416
Resident Tech
Associates
75 satisfied customers
Cat 725T cylinderrebuild procedure, are any special tools
Cat 725T cylinder(###) ###-####rebuild procedure, are any special tools needed and the pressure to set it & do i need to check a height measurement… read more
catmastertech
catmastertech
Technician
Vocational, Technical or Trade Scho
4,043 satisfied customers
I have a Bobcat 2017 T 740. many hours of diagonios with
I have a Bobcat 2017 T 740. many hours of diagonios with good mechanics. Error codes all wind up showing 000157-10. or(###) ###-####10. It has the following Delphi products not purchased on EBAY., but… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
1,243 satisfied customers
I have a 2012 cat 279c skid loader. We just rebuilt the
I have a 2012 cat 279c skid loader. We just rebuilt the motor and the machine will only run for 5 min and shut off. It will not restart unless you wait several hrs. I have power to the pump solinoid. … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
1,243 satisfied customers
I have a 950m and it's throwing a code of 2742-5 brake
I have a 950m and it's throwing a code of 2742-5 brake pressure accumulator sol current low. Where on the machine is this solenoid located … read more
catmastertech
catmastertech
Technician
Vocational, Technical or Trade Scho
4,043 satisfied customers
Need to know the first gear solinoid location on control
Need to know the first gear solinoid location on control valve … read more
Bradley Martin
Bradley Martin
77 satisfied customers
I have a Kubota u17-3 a and its been fine. Went to start it
Hi i have a Kubota u17-3 a and its been fine. Went to start it today and it won't turn over. … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
1,243 satisfied customers
I have a bobcat 334G mini excavator. I was working on a
Hi, I have a bobcat 334G mini excavator. I was working on a slope the past weekend and while I was cutting in a new road the excavator made 3 audible beeps and then the engine shut off. The Red exclam… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
1,243 satisfied customers
Reprogramming cat 725 dumper transmission ecm has generic
Reprogramming cat 725 dumper transmission ecm has generic result … read more
catmastertech
catmastertech
Technician
Vocational, Technical or Trade Scho
4,043 satisfied customers
287c cat alert light is on level 2. Have no lift arm or
287c cat alert light is on level 2 . Have no lift arm or tilt. Right joystick have no control. Connect cat communication adapter. Codes 681-5 110-3 190-2 1703-6 1704-3 Also use a plug to bypass door s… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
1,243 satisfied customers
Cat D6r Serias 2 Serial No 8TM01324 Code 689.5 Which Should
Cat D6r Serias 2 Serial No 8TM01324 Code 689.5 Which Should Be Left Hand Break Solinoid Open Circuit,. Ordered New Soliniod We Need To Know Wheres Abouts On The Machine The Solinoid Is Situated We Als… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
1,243 satisfied customers
I have a 2009 pt 100 forestry machine. I was moving it
I have a 2009 pt 100 forestry machine. I was moving it around a job and a small stick knocked a wire off of the brake/loader solenoid on the hydralic block. I had this happen one other time several ye… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
1,243 satisfied customers
I'm having transmission issues with a 966f series ii with the
I'm having transmission issues with a 966f series ii with the dash that has 4 analog gauges in it and a large analog tach. The transmission keeps kicking into neutral at random times during operations… read more
catmastertech
catmastertech
Technician
Vocational, Technical or Trade Scho
4,043 satisfied customers
I have a cat 950G Series 11 loader. It takes to start
I have a cat 950G Series 11 loader. It takes for ever to start and now I can't get to fire in will turn over and over but never fires has fuel in filter made sure they where primed and shut off valve … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
1,298 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