Hydraulic Brush Cutter Connections?

GATC35 · Jul 21, 2009

JJ,

I took some pictures last night, but didn't get a chance to download them from the camera. I'll try to get them posted when I get home today. I already bought a set of manuals, they are excellent. I'm not real thrilled with the sales staff or parts folks at my local Bobcat dealership, but the service manager is exceptional. Several days after I bought my T190 I walked into the service department and introduced myself. I explained I just bought a machine, had been a mechanic all my life, and didn't have a clue about Bobcats. Also told him about several of the problems I had. The guy just smiled and said "Well come on back here and let's have Bobcat school" For two hours he went all over a T190 that was in the shop. He showed me how to raise and block the lift arms, how to raise the cab, how to adjust track tension, and how to adjust the drive levers for creeping. Also pointed out all the rountine service points, and discussed the top 3 problems he sees with this model machine. The guy was great! Best service manager I ever dealt with. I even called the General Manager for the dealership and told him how impressed I was. Your right I need to take him a cool case of adult beverages.

Iron Horse,

Not famaliar with a "cross port relief", can you elaborate? I'm famaliar with case drain, they are all over the airplanes I work on. The motor does have some type of valve mounted on it where the hoses attach. Look at picture #5 back on post #12. Is this a cross port relief? If so what does it do?

Thanks....

J_J · Jul 21, 2009

GATC35 ,

I believe I can answer that about the relief. It is a safety feature, usually mounted close by the hydraulic motor, and is designed to let the fluid have a path to go when certain valves are in neutral. With a motor spool valve. it is not necessary, but if you loan it to someone and they don't have the motor spool valve, then they might break it.

https://www.surpluscenter.com/item.asp?UID=2009072106465092&item=9-4019-75-L&catname=hydraulic

GATC35 · Jul 21, 2009

I googled "cross port relief valve" now I understand. I just didn't know the terminology, we call them snubbers on airplanes. Looks like there is one already installed on the motor.

pics as promised.

J_J · Jul 21, 2009

GATC35.

Mark, did you receive my PM about the skidsteer forks?

Eagleview · Jul 21, 2009

GATC35 said:
I googled "cross port relief valve" now I understand. I just didn't know the terminology, we call them snubbers on airplanes. Looks like there is one already installed on the motor.

pics as promised.

That's good Mark , because a hydraulic slasher/brush hog on a skid steer without one or a case drain will dead head when you lift your foot off the pedal and will crack the motor case instantly . The inertia of the rotor will drive the motor and turn it into a pump , the oil has nowhere to go but out and that's why it has one fitted .