I'm planning to install a reconditioned breaker to my unit but i'm at lost to how the piping goes. how will i know the discharge line and the return line to be sure.
Are you asking which is the in port and which is out on the breaker? Those ports should be marked in or out, or possible P and T.
Your dealer can provide you the correct plumbing information. The lines on the end of the boom are often not marked but they will be at the valve block.
Per Willie's comment, are you asking about the plumbing on the breaker or the on the machine?
Actually I am referring about the plumbing on the machine. There are two valve block located near the foot of the boom, and there,s a valve that needs to be open/close. Do I have to close the valve on the supply line and open the valve of the return line? Greatly appreciate any help. Thanks & more power to the forum.
Ok, now that we know you're inquiring about the lines on the excavator, this is all going to sound a bit complex domsant17, but it's necessary info we must ask if you're fitting a breaker to a machine that has existing hyd auxiliary circuit. You must first determine whether your machine is set up for single acting only, or for double acting aux circuit. Climb up on the fuel tank of machine and note the two aux pipe lines attached to each side of the boom. Note the hoses that connect to these hard lines and follow the backwards to find what they are connected to. If both lines are connected to the main control valve chest located behind the swing motor, then it's likely a double acting system and won't work for a breaker. If just one of the aux lines connect to the main control valve, and the other line connects to either reservoir line, or return line going to oil cooler in front of engine radiator, then it's a single acting system. The setup that is required to operate a breaker on an excavator requires a supply line coming from aux valve on main valve chest connected to one of the pipes on boom to feed oil to breaker. The other pipe on boom, the return circuit, has to tee into the return circuit coming from main valve chest and goes to oil cooler. The return circuit from breaker cannot go through the aux valve section of main valve chest. Additionally, if the breaker you are going to use does not have a built in accumulator, you'll need to add accumulator to the return piping fitted to side of boom. Hope this helps.
the flow andf return are normally different sizes, the return is normally smaller ,no need to call the dealer and waste 70- 200 bucks an hour for them to send out an idiot that probable never saw a breaker before. dress them up in komatsu and cat overalls and charge you for talking to an overpriced idiot thats all dealers do!
It sounds like someone has already plumbed the machine for you. On the valve you are speaking of it should have on line coming back from the breaker, one line goes to the valve block and the last line either goes to the cooler line or directly to the tank. If you look at the end of the stem that the handle is connected to, you should see a line or a tee mark. Line up those marks with where you want the oil to flow. If you have a breaker installed, then you want the oil to go free back to the tank. If you are running a thumb or clamshell, then you want the oil to go back into the valve block. A photo of the valve and plumbing setup at the bottom of the boom would confirm what you have.
Thank's to all!! I'm really grateful to all the members who reply to this thread. Lots of info had been given that contribute much to a precise and easy handling of my works. Once again, thanks and more power to all!!
the return form the breaker is the larger size it is for the oil to return to the tank as quickly as possaible