Atlas1302

[daliti]

Hello,
Sorry for my post in English but your language is really very difficult to read.
I'm living in Belgium.
Why this post in the 1st place?
It was the only place on the whole WWW where I could find manuals for the Atlas 1302.
So thanks for sharing these..
I have a problem with a 1302 we bought second hand.
All hydraulics are working fine, only problem since some days is that we can't rotate any longer around the central axe.
Pressure is also lower than normal 4 bar.
Is there somehow an airbrake or hydraulic brake around the cabin?
Thanks
PS: HAs someone an English or French or German instruction user manual available?

[Daniel R]

Most likely you have an air-leak somewhere, 4Bar is not enough to unlock the rotation-break.

[daliti]

Thanks so far Daniel. So there's an air break on it? I tought it was rather a hydraulic break.
I couldn't find it on the drawings.
Any idea what the red and the white needle is on the pressure indicator?

[Daniel R]

One needle (dont remember wich one) is for the airpressure in the smaller air-tank thats for the brakes (wheels) and when that pressure reaches 4,5-5 bar the pressure starts going up in the main tank (the other needle).

The brakes are air-assisted hydraulic brakes and the brake for rotation is directly pneumatic and is fed from the main tank so if pressure never rises above 4bar it is unsufficient and probably due to an airleak.

Listen around the machine and see if you cant hear any airleaks. Broken hoses, leaking valves in the breakpedal or stuck/jammed/dirty valves ar common problems on the Atlas but fortunatly easy and cheap to repair.

[daliti]

Thanks very much Daniel. In the past, when we first used the excavator some days (practise a little bit the movements before the bigger jobs), pressure also rose very slowly.
We will now disassemble first the air compressor to see if we find something irregular.
There are no air leaks, so we suspect now the valves (reed?) inside the air compressor.
We are industrial refrigeration mechanics, so opening this German KNORR compressor will not give big problems I suppose.
As far as I already found, the lubrication of this compressor comes from the oil from the main motor.
Perhaps searching for a remanufactured compressor.

[Daniel R]

If the compressor is beyond repair it could be replaced with an ordinary stationary comressor with a bit of tinkering.
Check the regulator before opening the compressor, you could also connnect a separate airfeed to see if the machine works then.

[daliti]

Thanks again Daniel, I will look for it next week.