How JustAnswer Works:

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

Ask catmastertech Your Own Question

catmastertech
catmastertech, Technician
Category: Heavy Equipment
Satisfied Customers: 1839
Experience:  19 years Cat, 3 years Case
Type Your Heavy Equipment Question Here...
catmastertech is online now
A new question is answered every 9 seconds

I have a cat D3B right side will not turn (dry) steering clutchs

Customer Question

I have a cat D3B right side will not turn (dry) steering clutchs look about half worn ......How do I check the hydraulic pressure on the inside cup ......or how do I loosen this up it only started not working after sitting
Submitted: 2 years ago.
Category: Heavy Equipment
Expert:  catmastertech replied 2 years ago.

Donnie :

Could you explain your problem a little more? Is the track not stopping when you apply the brake or does the track not pull (slipping) when you are driving.

Donnie :

The steering clutch does not have any adjustment. Only the brake can be adjusted.

Donnie :

If the brake is not working, the pedal will travel all the way to the floor and not stop the track for a hard brake turn.

Donnie :

The steering clutch is applied all the time by spring pressure. It uses hydraulic pressure to force the clutch open. This will allow a gradual turn by not driving the clutch and the power on the other track will turn the machine.

Donnie :

Never adjust the linkage, the brake adjustment is a separate adjuster and is easy to but, hard to find.

Donnie :

It is common to have a failure of the steering valve roller bearing (on later models) and this would not allow the machine to disconnect the steering clutch. You would need to use excessive force on the brake to cause the clutch to slip to make a turn. Forcing the turn in this manner will quickly wear out the steering clutch.

Donnie :

Please include the serial number of your machine with your reply.

Customer:

serial # XXXXX 5G1093 ARANGEMENT NUMBER whats the easiest way to remove and check the roller bearing or just get this unstuck ........I have this apart and ready to pull out the whole drive unit

Donnie :

Not much to show from the manual. The valve is under the seat and has a rod connected to the actuation cam.

Donnie :

Remove the valve and disassemble it. The only trick is to pull out the roll pin that keep the spool and roller aligned.

Donnie :

I use Vise Grip pliers and have had good luck, broken a couple of pins though.

Donnie :

Here is a picture of the valve.

Full Size Image

Donnie :

Here is a parts list of the valve.

Donnie :

6H-3956 is the pin that get broken when you pull it out. The roller is item 13, it rides on pin 15. Replace the seals while it is apart.

Donnie :

If the roller is not damaged, check the slave cylinder in the housing. It could be leaking. If it is damaged you may need to replace the cam and its shaft. Anything with wear should be replaced.

Donnie :

Replace items 4,5,6 and 20.

Donnie :

I am assuming your problem is the clutch is not releasing and you must force a turn with the brakes?

Customer:

I have both covers off showing the brake lining and clutch assy i have reassembled all of the hyd lines to the brakes andcan start the machine to spin the track. when i pull on the rod that tightens the brake it will slow the drum down at an idle but thats it, the wish bone shaped arm is not disengageing like it does on the left .I have checked the parts you sent pics of they are fine and not leaking . I am going to try to pull out the clutch assy today

catmastertech, Technician
Category: Heavy Equipment
Satisfied Customers: 1839
Experience: 19 years Cat, 3 years Case
catmastertech and 2 other Heavy Equipment Specialists are ready to help you
Expert:  catmastertech replied 2 years ago.

I hope this reply gets to you before you do too much work, I just got the information that you had accepted my answer.

 

You are looking right at the problem. Most like likely the clutch is fine.

"It is common to have a failure of the steering valve roller bearing (on later models) and this would not allow the machine to disconnect the steering clutch. You would need to use excessive force on the brake to cause the clutch to slip to make a turn." from earlier

You stated "the wish bone shaped arm is not disengaging like it does on the left" That means the clutch is not releasing and the machine will not turn to the right.

The steering valve roller bearing is damaged and not pushing the valve spool in far enough to release the steering clutch. Like the original question, you are not getting enough pressure to through the valve to release the steering clutch. The steering valve is the control for the clutch release slave cylinder connected to the (wishbone) yoke.

If you install the parts from the list I sent you earlier, the clutch will release and the tractor will turn to the right with very little effort.

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:

 
 
 
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
< Last | Next >
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
  • used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future. David L. Richmond, TX
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil Marysville, CA
  • Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible. Charles Walnut Creek, CA
  • As a single woman, I really appreciate an excellent and affordable opinion.
    Thank you Geordie, I will not hesitate to contact justanswer in the future!
    Sue Charleston, WV
  • Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff. Jim Castleberry, FL
  • 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
 
 
 

Meet The Experts:

 
 
 
  • Chris (aka - Moose)

    Technician

    Satisfied Customers:

    112
    16 years of experience
< Last | Next >
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka - Moose)'s Avatar

    Chris (aka - Moose)

    Technician

    Satisfied Customers:

    112
    16 years of experience
  • http://ww2.justanswer.com/uploads/Boxerman1969/2009-06-22_213107_ja_avatar.JPG Tim's Avatar

    Tim

    Foreman

    Satisfied Customers:

    338
    23 Years Heavy Equipment and Truck Repairs Shop and Field in the Minning and Construction Industry
  • http://ww2.justanswer.com/uploads/jrwhitey2000/2009-01-03_193237_me.jpg J.R.'s Avatar

    J.R.

    Technician

    Satisfied Customers:

    148
    13 years as warranty technician for Detroit Diesel
  • http://ww2.justanswer.com/uploads/yellowman99/2010-03-20_033822_Marshall_Pete_Furr.jpg Cat Man's Avatar

    Cat Man

    Caterpillar Engine Expert

    Satisfied Customers:

    3706
    23 Years Caterpillar Engine experience.
  • http://ww2.justanswer.com/uploads/WT/wtolkson/2012-6-8_12723_JApicture2012.64x64.jpg Wayne's Avatar

    Wayne

    Journeyman

    Satisfied Customers:

    3017
    34 years experiance as engine rebuild and problems.Thermo-King repair and trouble shooting.
  • http://ww2.justanswer.com/uploads/cumminsdr/2010-7-20_204410_ja.jpg DR.Cummins's Avatar

    DR.Cummins

    FIELD SERVICE TECHNICIAN

    Satisfied Customers:

    2352
    16 Years working on Cummins Diesel engines,
  • http://ww2.justanswer.com/uploads/KO/koboma/2012-6-6_20917_DSCF1022.64x64.JPG Curtis B.'s Avatar

    Curtis B.

    service manager

    Satisfied Customers:

    2226
    30 years exp. with diesel engines, heavy equipment and forklifts, including lp forklifts