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Bradley Martin
Bradley Martin,
Category: Construction and Road Equipment
Satisfied Customers: 173
Experience:  Field Technician at Thompson Tractor Company
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My d31p won't steer left or right

Customer Question

My d31p won't steer left or right
Submitted: 9 months ago.
Category: Construction and Road Equipment
Expert:  Bradley Martin replied 9 months ago.

I would say either left or right clutch is not pulling. Have you put it against a pile of dirt and seen which track is working?

Customer: replied 9 months ago.
After rebuilding the ppc valve it will not steer left or right. I bled all hoses to make sure there was no air.
Expert:  Bradley Martin replied 9 months ago.

Does it have forward and reverse?

Customer: replied 9 months ago.
Forward and reverse works
Expert:  Bradley Martin replied 9 months ago.

Let me opt out see if someone else can help I can not find my manuals on this one

Customer: replied 9 months ago.
Ok
Customer: replied 9 months ago.
Any luck
Expert:  Bradley Martin replied 9 months ago.

Whats you model number and serial number?

Customer: replied 9 months ago.
I know it is D31P-20 serial starts with 48 I can't remember the rest
Expert:  Bradley Martin replied 9 months ago.

There is a filter going into thee PPC valve on a 90 degree fitting> Have you checked that and made sure it was not stopped up with debris?

Customer: replied 9 months ago.
Customer: replied 9 months ago.
That screen is actually inside the ppc value
Expert:  Bradley Martin replied 9 months ago.

How about your steering brake cylinder? Has that been rebuilt lately

Customer: replied 9 months ago.
They have not been rebuild
Expert:  Bradley Martin replied 9 months ago.

I would check the cylinders for blown O-rings.

Expert:  Bradley Martin replied 9 months ago.

Are you checking the brake cylinders?

Customer: replied 9 months ago.
Brake cylinders look good no leaks and working back and forth
Expert:  Bradley Martin replied 9 months ago.

You said you rebuilt the PPC valve correct?

Customer: replied 9 months ago.
Correct. I just went back took it apart make sure I didn't put something in wrong. Everything is in right
Expert:  Bradley Martin replied 9 months ago.

It was working before you rebuilt the PPC valve.

Customer: replied 9 months ago.
Expert:  Bradley Martin replied 9 months ago.

Are you positive the lines are not crossed on the PPC valve?

Customer: replied 9 months ago.
I marked all the before taking apart and took a photo. I put everything back as marked
Expert:  Bradley Martin replied 9 months ago.

There has to be a problem with that valve if it was working before rebuilding. Where did you get a kit because from the parts manual I have it does not list a rebuild kit only replacement PPC valve.

Customer: replied 9 months ago.
I got new seals, o rings, filter screen from Komatsu dealer
Expert:  Bradley Martin replied 9 months ago.

The only other thing it could be is trash in the lines from the trans to the PPC and out of the PPC. I dont see any other thing it could be surley the clutches could not be worn if it was working before.

Customer: replied 9 months ago.
Going through the lines is my next step. You would think at least one direct would work
Expert:  Bradley Martin replied 9 months ago.

I would check the lines if they are good I will see if we can get some more help on this issue.

Customer: replied 9 months ago.
I contacted my local dealer and have a tech scheduled to come Thursday. I hope I can figure something out before then
Expert:  Bradley Martin replied 9 months ago.

hopefully we will figure this out.

Expert:  Bradley Martin replied 9 months ago.

Let me know what you find out in the lines.

Customer: replied 9 months ago.
Do not know what I did but got it working
Expert:  Bradley Martin replied 9 months ago.

What were you doing when it started working?

Customer: replied 9 months ago.
Ribbed the engine up just started jerking the the steering handle back and forth
Expert:  Bradley Martin replied 9 months ago.

Must have still had some air trapped in the system some where dont know if I helped any but please rate me when you have time

Customer: replied 9 months ago.
Ok
Expert:  Bradley Martin replied 9 months ago.

Let me know how it does while you are running it.

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