DROTT SKIDLOADER

tpmx

New User
Ok with winter over I am back to working on my dozer
fired it up tonight and brought it up to the garage where I can work on it.
I am curious as to the purpose of the large coil that is tied into the loader hydraulic lines.
It appears to be some type of "cushion" for the hydraulic system and wonder if it is on the lift side of the loader or what its purpose is for.
There is a handle there but is not hooked up to anything.
Anyone have any insight as to the purpose of this ?

Here is a link to my original post:
http://forums.yesterdaystractors.com/viewtopic.php?p=5629562#5629562

This is a TD6 with a drott skid loader that does not have the 4-1 bucket
 
We commonly called that a hydro spring in my neck of the woods and you are correct in saying it's a cushion for the hydraulics,usually in front of it was a tee piece lever to turn it on and off,you would notice the difference if you have a full bucket and drop it down a bit if the hydro spring was off it would stop abruptly and give a jerk,if it was on the spring would compress and the stop was smoother,it was turned off when grading as the hydraulics were more positive without the cushion, I think the hydro springs were on all IH Drotts models.
AJ
 
Thanks AJ
Kind of thought that was its purpose.
Either way it should not affect not having any up pressure.
going to hook up a pressure gauge to the lift spool and see what is going on there than trace it out.
i did crack the lift lines and get fluid when the valve is operated.
Starting to look like a problem in the cylinders but I dont understand why I have good down pressure.
Like I stated earlier I can lift the machine front up with the loader with the down pressure.
Just wont even try to lift the loader
 
I think that most cylinders of that vintage had chevron type seals,there were two sets on each piston,those seals were directional,the vee facing the pressure so it is possible to have down pressure and no lift,test the cylinders by removing the return hose one side at a time,if the oil is bypassing the piston it will come from the return outlet.
AJ
 

Thanks Al,
That makes perfect sense and is easy enough to do as that side of the cylinder is easy to get to.
If only one of the cylinders was leaking would the other not even try to lift?
My loader doesnt even twitch when I try to lift,there is just nothing
Thanks very much for your help
 
If one seal has failed thats enough to cause it not to lift, fluid power is the same as mechanical or electrical power it always finds the easiest route of escape.
AJ
 

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