330c swing drift

[Cat32]

Im working on a 2004 330c and noticed the swing will slowly drift if on a slope. It will not drift with the hyd lockout switch flipped. Im having a hard time finding any info on sis about the problem. any help would be appreciated.

 

[James Sorochan]

Cat32. If you could let us know what make of 330c machine you have with the serial number it is will be helpful to those that can help.

 

[Cat32]

cap01370

 

[Nige]

Is the free/fine swing switch in the "OFF" (activated) position by any chance.?

 

[Cat32]

I apologize i read that wrong its a caterpillar that was the serial number i just posted.

 

[Nige]

I apologize i read that wrong its a caterpillar that was the serial number i just posted.

Don't worry the S/N identified what it was just fine.

 

[Cat32]

Is the free/fine swing switch in the "OFF" (activated) position by any chance.?
Im not seeing that switch in the cab

 

[Nige]

Im not seeing that switch in the cab

OK, it was just an idea. It is an option not fitted to all machines.
Moving on - is this your first time on this particular excavator.?

 

[Cat32]

Yes. Im fixing to check pressures on the swing relief valve and the swing pilot supply pressure. Im i at least headed in the right direction?

 

[Nige]

Yes. Im fixing to check pressures on the swing relief valve and the swing pilot supply pressure. Im i at least headed in the right direction?

See where the attached gets you.

 

[Cat32]

thank you so much ill keep you updated on what i find.

 

[Gary Layton]

You seem to be describing EXACTLY what my CAT 320CL was doing when we first got it...I thought I had a slew motor problem. The switch Nige just posted was the problem...I never noticed it until folks here made me take notice. See this thread:

CAT 315 swivel issue

Hey all, I have a 2017 CAT 315, I was loading trucks and began to notice that when swiveling, the machine’s momentum kept it going and I had to stop it turning as opposed to it stopping when I let go of the joystick as usual. Almost like it became “loose” any ideas what the issue may be?

www.heavyequipmentforums.com

 

[skyking1]

He already looked Gary, his reply is inside the quote up there. He does not have the switch.

 

[Gary Layton]

Missed it...thanks.