necaise p

[Kobelco ireland]

O

2003 acera dyamic 160 Kobelco ymo3

OK when you asked about collapsed hose between pump and valve body is it a main hose or sevro hose coming off the pump regulator

 

[patrick necaise]

left track is real slow and weak if u put boom down to pick machine up u have to move the left lever a little bit to pick machine swing is real slow and the bucket moves slow the right track moves good

 

[funwithfuel]

So left stick and travel functions are weak, right stick and travel are strong? To confirm

 

[patrick necaise]

there two hoses about one inch from pump to valve body thinking maybe the one from pump two going to valve body may be collapsed being nothing on pump two is working right

 

[patrick necaise]

yea that's right fwf

 

[funwithfuel]

Ok. Going back a bit. Can you swap servo hoses from boom to arm or bucket to swing at the main control valve? what we're trying to establish is whether you have a servo issue or a pump issue or a controller issue. You may just have poor drain at the pump controller

 

[funwithfuel]

What would happen if for example you pulled boom up to the end of Boom travel held it there and then tried any function on your left hand stick would your function speed be increased

 

[John C.]

Which pump was bad before the rebuild and is it the noisy one now? Many of the shops now days think that rebuilding a hydraulic pump involves installing bearings and seals only. They don't know about lapping the piston and barrel assembly to the seal plate nor do they have the measuring tools to check the piston and barrel fit.

 

[patrick necaise]

pump two is the one whining I when in the pump first and didn't see nothing wrong then I pulled it back out an sent it to a hydraulic shop and let him know what it was doing when he got in to it he called me an said he seen nothing to make it whine he resealed it and I have the same thing now

 

[patrick necaise]

fwf the only thing that works normal is the right track ,what or u calling servo I don't see it in manual

 

[funwithfuel]

On the end of each spool, you have spool caps. On the end of the cap you have a small line which should come from your remote control valve. When you stroke the joystick, that sends servo signal to spool. Spool shifts and allows pump oil to go out to do work, at the same time sends signal to the pump to increase displacement.
I guess it's time for gauges, are you equipped?

 

[funwithfuel]

Some folks call it pilot oil , if that helps
Any chance you can post a pic of your main control valve?

 

[funwithfuel]

https://drive.google.com/file/d/0B3CHoxRUD5qALVJwWWN5REh2UXc/view

Lifted from excatech

 

[patrick necaise]

FWF, control valve

 

[funwithfuel]

Yeah, all those little hoses going to the spool caps are servo or pilot, but we're past that now.
Now you say only R travel works properly. That sucks. Something must be bleeding oil back to tank. I think you'll need gauges. A pair with 7k psi should be plenty. You want to see discrepancies between pumps, what functions yield correct pressure. You'll also need to find cycle times for your machine. We have to start at the beginning and work through. Otherwise, you're wasting money on parts and labor for nothing. You stated that you have the factory service manual. That's a big plus.
If you wanna tackle this, myself and others will help you along. I will preach safety a lot. I mean no offense, I just don't know your skill and comfort level. I don't want anyone getting hurt following my instructions.