Need a lesson in high flow aux.

[Orchard Ex]

Some basic questions on high flow aux. hydraulics:
Will a high flow machine always have the larger size couplers or can they use the normal size also?
Does a 3rd line (case drain) always indicate a high flow machine?
What purpose does the case drain serve? Relief for the attachment motor?

Background: A buddy has bought a HF brush cutter and wants to rent a CTL to run it until he decides which CTL to buy. Rental yard says that their TL140's are HF but he doesn't believe them because they have the "normal" size couplers not the larger size that his attachment came with. The rental 140's do have the 3rd line/case drain however. The easy answer would be to fire it up and see if there is any action on the HF button, but the only one in the shop was down for repairs.

 

[HeyUvaVT]

case drain does NOT signify high flow....high flow ONLY uses the larger couplings...Tak does NOT make a high flow machine...yet...they have the TL250 coming out that will be high flow...also...I dont know what cutter you have (if its like a bush hog then disregard this) but if you are using a forestry mulcher then you need a machine of at least 85-100hp to make it run decently...you are right on with the case drain purpose

 

[bobcatmechanic]

as far as bobcat goes they are the same size couplers on all the machines the only diffrence is the gear pump and the hoses under the cab also being programmed to know it has it usually a sticker on the outside by the couplers or on the back of the machine wil tell you other wise if it has a high flow button and a light you can tell that way or just call the dealer of what ever your looking at and find out if its offered different ways and the flow they put out older bobcats where 28 then 32 on the g series then 39 on the new k series on the high flow side they all run about 18 - 25 on regular flow depending on the machine size

 

[HeyUvaVT]

hmmm i stand corrected on the couplers...never been in a bobcat

 

[Squizzy246B]

Some basic questions on high flow aux. hydraulics:
Will a high flow machine always have the larger size couplers or can they use the normal size also?
Does a 3rd line (case drain) always indicate a high flow machine?
What purpose does the case drain serve? Relief for the attachment motor?

Background: A buddy has bought a HF brush cutter and wants to rent a CTL to run it until he decides which CTL to buy. Rental yard says that their TL140's are HF but he doesn't believe them because they have the "normal" size couplers not the larger size that his attachment came with. The rental 140's do have the 3rd line/case drain however. The easy answer would be to fire it up and see if there is any action on the HF button, but the only one in the shop was down for repairs.

https://www.heavyequipmentforums.com/Forum/showthread.php?t=7953&page=2

A picture of my Hi-Flow connectors halfway down the page. The 248B was good on the chain trenchers.

 

[KSSS]

The machine should have the larger hyd. connections at the high flow. If they don't your creating more heat than needed as you thread all that fluid through a smaller opening. I think the guy will have problems finding a suitable machine to rent that is set up for such applications. A high hp/ROC, high flow equipped tracked machine with a cab and a Lexan door will not be an easy machine to find when you need to rent one to get customers jobs done. It certainly wont be like going down to the local rent a wreck and picking up a 1500 ROC Bobcat.