D7 17A Track Slack

[quote="dph"]I've got a hydraulic track adjuster on the 17A. The other night I got slack in the track all of the sudden. Last night I added grease, took the slack out, and the first time I braked hard and turned the slack came back.

Through the inspection hole I can't see excessive grease from the zerk or the relief valve. I can't see grease from that angle at the front of the cylinder. I was going to take the rest of the covers off tonight, but I figured someone on here would have a good idea of what is going on.

Thanks,
Dan[/quote]

This is my first post on this site; hope it helps.
I had the same experience on a D6C. The piston seal in the adjuster cylinder went bad, the grease got behind the piston into the pilot assembly, and eventually blew out an o-ring seal between the cylinder and the pilot. You'll likely need a seal kit for the track adjuster, and if it's anything like the D6, a lot of sweat. The service manual said you have to break the track and remove the front idler in order to remove the cylinder. I didn't believe it at first; now I do!
American Crane and Tractor (Dallas) had the seal kit I needed for $25. http://www.actparts.com Good Luck

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l have a similar problem on my D7 17a

When i pump grease into the right nipples grease comes out around where the ram comes out of the shaft and the track wont tighten.

lm thinking i may have the many hours of swearing to replace a $20 seal

............................. a better picture. The grease is coming out around the red doodle.

How do i find what kit i need, my D7 has a winch and a motor from god knows what where would i find the right #s

We could be in the same grim boat Dan!

Cheers

............................. a better picture. The grease is coming out around the red doodle.

How do i find what kit i need, my D7 has a winch and a motor from god knows what where would i find the right #s

We could be in the same grim boat Dan!

Cheers

Not quite the same boat....those are aftermarket adjusters, not the Cat variety. How do I know?? happen to have a NOS never been mounted set that were supposed to be for the D6.....wrong!!!

Should be a common type seal once you get them apart.

Winch with it's own motor?? Post a picture.

[quote="Old Magnet"]Not quite the same boat....those are aftermarket adjusters, not the Cat variety. How do I know?? happen to have a NOS never been mounted set that were supposed to be for the D6.....wrong!!!

Should be a common type seal once you get them apart.

Winch with it's own motor?? Post a picture.[/quote]

Aplogies for not being clear, my D7 has a winch mounted so it covers the # on the back of the frame. The motor is from god knows what..............4H8959 (i think)on the block.

Do i take it apart as per the manual untill i get to the ajuster, split track, remove idler, etc etc?

Cheers

Same drill to access the adjusters.
Engine is a D339

............................. a better picture. The grease is coming out around the red doodle.

How do i find what kit i need, my D7 has a winch and a motor from god knows what where would i find the right #s

We could be in the same grim boat Dan!

Cheers