D4 7U track adjustment

I have a D4 7U11595 and need to tight up the tracks but have never seen this exact type that doesn't have the typical clamp bolts that you loosen to allow the threaded rod to turn. Instead the are 2 zerk grease fittings which are unlike anything I've been able to find in any of my manuals or online for that matter. I have only tried turning the adjustment nut with a 5' bar on my track wrench and was able to get about 1 1/2 turns before it started binding up. I'm about to pump the fittings with grease and see if it's hydraulically adjustable? Has anyone seen or have experience with this type?

Thank you,

CrawlerAddict

Figured out that it is adjustable with a grease gun on the inner fitting.

The nut you tried turning is to set the preload on the spring not to adjust track tension. My guess would be the upper grease zerk is the adjustment and the lower one is to keep the theards from seizing up for disassembling them.

I do not know for sure but in some of the Hydraulic Track Adjusters, what appears to be a grease zerk is actually the relief for the pressure in the cylinder. Be certain what you are doing, if one tries to remove the zerk without releasing the pressure, you have a projectile - one that has no care for you! --- cts

Hi, CrawlerAddict.

That is an after-market modification if the welding is any indication and it sounds like you may have 'figgered' it out. Looks like it would be a pretty good improvement over the original.

That is a 'different' hydraulic set-up that you have there - ain't seen one like it afore.

Just my 0.02.

Hi Crawler addict, I would suggest the top zerk has the large head behind is the same as what is on later model grease adjustable canon set ups for track tension, the larger head normally indicates long reach with tapered end to seal in the grease and be able to realise pressure via a journal to the side to allow grease to return out (inside larger machine track frame), basically you pump in grease as per normal operation then to release pressure undo the larger head and it bypasses grease out. This particular arrangement I have never seen it before nor used one. maybe operates the same? Dunno

Hi Team,

I seem to recall questions on these way back early 2000's. l

Link below is for more modern version now available.

https://www.brokentractor.com/p/hydraulic-track-adjuster-for-cat-d4-dozer-pv310x/?srsltid=AfmBOopq7eCK9OWtT_sg9AxUWHxvDWq-dbxXfeUfsv0Gpi53BtLXPLtU

Cheers,

Eddie B.