check that no leaks of oil are in the hydraulic ciruit due to pipeconnecting

check that no leaks of oil are in the hydraulic ciruit due to pipeconnecting
Check that no leaks of oil are in the hydraulic ciruit due to pipeconnecting pieces un screwed or to breackaqe of seals or of mechanical parts.Eliminate these leaks immediately as they are a great dammage for the good running of the machine,and arrang to add the oil leaked.
It is better to remember when you have to replace some seals or mechanical parts which are whole part of the hydraulic circuit ,that it is necessary to deliver the oil from the filling thank 4,into that of the general board,by turning tap 6 to discharge position.
while it is simple enough to replace the outside parts of the cylinder,of the general tank and others ,to replace the seal of the main piston and those of the quick lifting piston as well as the relevant mechnical parts,is required a particular procedure shown also in our drawing.鞠躬!
pipe-connecting