D6C Track Adjuster

Hi, Steamdrum1.
That sure sounds like a blown seal to me. Did that mechanic get his certification off the back of a Kelloggs packet? Did he not notice the track getting tighter as he pumped grease into it? If he is a genuine certified heavy equipment fitter for earth moving equipment, why didn't he know about that?

A kew-ree-yuss mind would like to know.

Just my 0.02.

My D6C 10K has never been able to hold track adjustment... I have to give them like 10 pumps each day I use it, been like that since I bought it. Maybe this is a common problem with this model?

I was pretty disgusted to say the least. The undercarriage is like brand new on this tractor. This d6 is our construction department tractor at the Cat Decatur Plant. It only gets ran a few hours a year. The whole machine is in amazing shape!

What do you mean by "a hole in the front"? All hydraulic adjusters are constructed pretty much the same and in general they work well if assembled and maintained properly. Where is the adjustment sitting when the push rod is extended? Is it bottomed out?

Hi SD1,
be aware there are two types of release valves on each adjuster cylinder.
One has the special grease nipple/zerk fitting to adjust the track by, the second is a blank bolt headed grease relief valve.
It my be this second one that is not seated.
From memory there should be two grease exit holes aligning with each valve in the back of the cylinder flange to allow manually released grease out of the adjuster system.
Cheers,
Eddie B.

Hi SD1,
be aware there are two types of release valves on each adjuster cylinder.
One has the special grease nipple/zerk fitting to adjust the track by, the second is a blank bolt headed grease relief valve.
It my be this second one that is not seated.
From memory there should be two grease exit holes aligning with each valve in the back of the cylinder flange to allow manually released grease out of the adjuster system.
Cheers,
Eddie B.

[quote="edb"]Hi SD1,
be aware there are two types of release valves on each adjuster cylinder.
One has the special grease nipple/zerk fitting to adjust the track by, the second is a blank bolt headed grease relief valve.
It my be this second one that is not seated.
From memory there should be two grease exit holes aligning with each valve in the back of the cylinder flange to allow manually released grease out of the adjuster system.
Cheers,
Eddie B.[/quote]

I think you're got it right there....one of the valves isn't seating. If it was a blown seal it would be leaking around the cylinder or piston. I had a new aftermarket track cylinder for my 6c that was doing the same thing....turned out they hadn't tapped the holes deep enough for the two valves and they bottomed in the thread before sealing.

[quote="edb"]Hi SD1,
be aware there are two types of release valves on each adjuster cylinder.
One has the special grease nipple/zerk fitting to adjust the track by, the second is a blank bolt headed grease relief valve.
It my be this second one that is not seated.
From memory there should be two grease exit holes aligning with each valve in the back of the cylinder flange to allow manually released grease out of the adjuster system.
Cheers,
Eddie B.[/quote]

I think you're got it right there....one of the valves isn't seating. If it was a blown seal it would be leaking around the cylinder or piston. I had a new aftermarket track cylinder for my 6c that was doing the same thing....turned out they hadn't tapped the holes deep enough for the two valves and they bottomed in the thread before sealing.

The grease is coming out of the hole that is in line with the valve with the grease zirk on it. The other valve with the plain bolt head is screwed down tight and no grease is coming out of the hole in line with it. Could the one with the zerk need to be tightened down?