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Check out the filters,and is the proper weight oil for the hydraulic been changed lately and refilled with correct oil. May have air in the line as well, bleed the line
Craig, I do not have a lot of experience with trenchers, if hydraulic operated not enough oil/check reservoir,, one of the valves/controls may be stuck, you will have to follow line from boom cylinder and trace it back to the valve and dismantle and repair. Secure boom as to not harm you or others.
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Equipment specification for a Ditch Witch 5110. ... Ground drive: Transmission (mechanical): 4 speeds forward, 1 reverse with gear drive to axles ... Engine oilincluding filter: 8.5 qt ... This information is subject to change by the manufacturer.
ive heard of folks doing it without a crane but i would not try it , alignment is too critical with getting guides and stops back in and with nothing to move boom that would be too difficult
anyways: suspend boom end with double straps from crane , disconnect hydraulic/electric swivels/plugs at truck end lift end of boom slightly with boom all the way extended straight out , remove acess panel (both sides) at jct of upper/lower boom section . remove C clip one side drive out pin oppisite side (wiggle boom to clear pin) locate stops in lower section boom end unbolt , slowly pull upper boom with crane away take care of hydraulic lines and electric wires set on floor on wood cribbing , locate bottom of cylinder truck end find C clip and pin Might be behind a trim cover that might need to be remove drive out pin also remove bottom cylinder hyd hose connect crane to cylinder end move out a foot or so remove top cyliinder hydraulic hose then carefully slide out cylinider with crane , Note if your valves are not tight and new oil will leak back and cause boom base to sag when you unhook hydraulic hoses , your gonna need to block this up with wood cribbing just in case
reverse removal process to install new one , also i would not just install a new seal (you can) with out having cylinder recromed I'll bet it's rusty thats what tears the seals up
and allways replace entire oil volume in hydraulics your old seal is in old oil not good for the new one
You may have something stopping up the hydraulic supply line. You may have to bleed the air out of the cylinders. they often have bleeders in the end of the cylinders, if not crack the supply hoses loose and bleed air from them. Also loosen the pressure line side of the pump and bleed out air. The pumps should start pushing fluid out, crack the pressure lines while running. Also check that the vent cap is functioning properly. If it is not venting it can build up a vacuum that will starve the pump of oil.
Like other hydraulic systems, there is probably a procedure for bleeding the lines after loss of most of the fluid.
You may still have air trapped in the system and once it works its way to the cylinder, the cylinder is working with air instead of fluid and the air compresses instead of doing work.
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