Hello, Should the return hose of auxilary hydralics (in this case brushcutter) be of a larger diameter than input hose? ln this case the input hose to the brushcutter head is 1/2" should the return be 3/4" or is 1/2" Ok? Cheers.
whats the inside diameter??? why wouldnt you want 3/4" for both??
The ID is 1/2"!!! This brushcutter is designed to have 1/2" imput line!! lt was plumbed with 1/2" both ways on the previous machine. l read somewhere that it was better to have a larger return...................................
Does the attatchment work single or double acting ie in one direction only ? Single acting circuits usually have a larger return to tank fitted to reduce back pressure when hydraulic breakers are fitted and return direct to tank and not thru the valve block itself. The double acting attatchment circuits on Komatsu's have a larger return side so when breaker is fitted there is little back pressure, but still allow double action thru the valve block when switched . What size is the feed and return hoses on the machine itself going the end of the arm ?
Motor works always have a larger return than a supply. The scenario is set up using a chart that is based on flow and inherent back pressure from friction within the piping or hoses. Parker puts out a catalog that has one of those charts in the back. I'll have to see if I can find one of my old books and try to post the chart on here.
Thanks John C, that's what i needed to know.
I use this chart as a guide, oil velocity should be kept at or below: Suction lines 8 ft/sec Return lines 15 ft/sec Pressure lines 30 ft/sec Hope this helps.
Thanks Harry!
Thanks Harry Dart, I looked all over trying to find that chart. John C.