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Curtis B.
Curtis B., Technician
Category: Construction and Road Equipment
Satisfied Customers: 1148
Experience:  Technican turned service manager with multiple lines of equipment and rental units.
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I have a cat D3c. Left track not pulling. Checked linkage

Customer Question

I have a cat D3c. Left track not pulling. Checked linkage and fluid all ok
Submitted: 1 year ago.
Category: Construction and Road Equipment
Expert:  catmastertech replied 1 year ago.

Hello,

How did this problem begin?

Do you hear any noises from the final drive?

Did you drain the oil from the final drive to inspect it for metal?

What is the full tractor serial number?

Customer: replied 1 year ago.
No noise detected left track just stopped pulling I have it off the ground. Right track pulls left doesn't
Expert:  catmastertech replied 1 year ago.

What is the full machine serial number?

Customer: replied 1 year ago.
8be00180 arr# *****
Expert:  catmastertech replied 1 year ago.

How did this problem begin? What were you doing last?

Customer: replied 1 year ago.
Customer was pushing dirt for stock pile
Expert:  catmastertech replied 1 year ago.

Does the track move or turn at all?

Customer: replied 1 year ago.
No
Expert:  catmastertech replied 1 year ago.

I would drain the oil for the left final drive to inspect it for metal or damaged parts.

Possible the upper bearing has failed and has jammed in the final drive gears.

Expert:  catmastertech replied 1 year ago.

Do the brake pedals feel even and move equally?

Customer: replied 1 year ago.
It has levers they both feel the same
Customer: replied 1 year ago.
It's not lickage I checked that. I checked to make sure plungers were moving in and out on valves. All looks good
Expert:  catmastertech replied 1 year ago.

This tractor does not have steering brake pedals? Is it a SA (Special Application -for farming- usually with manual transmission)?

Customer: replied 1 year ago.
manual trans
Expert:  catmastertech replied 1 year ago.

Just want to verify the brake bands are not damaged. Usually the pedals will feel different when a brake band is damaged. Hand controls will not feel the brakes the same as pedals. If the oil in the final drive is clean, then I would suspect a brake band.

Customer: replied 1 year ago.
But left track not driving at all it won't turn right. When moving forward you pull left it goes left you pull right it stops
Expert:  catmastertech replied 1 year ago.

You said earlier, the left track does not move. I assume you meant it is locked completely.

Expert:  catmastertech replied 1 year ago.

Dou you mean it does not have any pulling power? Does it turn with the machine off the ground?

Customer: replied 1 year ago.
Unit in the air track doesn't move. On ground it mves but won't turn right
Expert:  catmastertech replied 1 year ago.

Ok, sorry for my misunderstanding.

The only things that can cause this is the pressure is going to the release piston or it is jammed in the release position.

Can you move the left track manually and it not move move the right track?

Expert:  catmastertech replied 1 year ago.

This would tell you if the drive is broken to the left track.

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