Haulotte Group xlb-4725a, Руководство по техническому обслуживанию оператора, Страница: 74 / 118

HAULOTTE GROUP 5 CYLINDER REPLACEMENT
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LIFT CYLINDER REPLACEMENT (CONTINUED)

Verify that the cylinder is supported by lifting straps and an overhead hoist or equivalent.

Remove the pivot pin using a hammer and a brass or hardwood drift.

Use an overhead crane or lifting gear to raise the boom section. Adequate clearance is
necessary to reach the cylinder valve block (base end) and hydraulic hose ports.

Remove the valve solenoid by unscrewing the cap, sliding the coil off, then unscrewing the valve.

Tag and number all hydraulic hoses that attach to the cylinder valve block. Use a marker to label
the valve block ports with the appropriate hose numbers.

Place absorbent cloths below the cylinder ports and detach hydraulic hoses from the cylinder.
Elevate hoses to prevent leakage. Plug or cap exposed hose fittings and cylinder ports.

At the base of the cylinder, unbolt and remove the pin retainer from each side of the pivot pin.

Remove the pivot pin using a hammer and a brass or hardwood drift.

Lift and remove the cylinder using an overhead hoist and lifting straps or equivalent.

Replace or reinstall the cylinder by following the above instructions in the reverse order of
removal.

Actuate the hydraulic system and check for leakage. Tighten hydraulic fittings as needed.

Bleed trapped air from the hydraulic system by raising and lowering the boom with the reservoir
fill port cap on, but not tightened. Allow several cycles of operation for trapped air to escape.
Repeat as necessary
.