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15. Set the boom in the completely retracted and fully
raised state, fit the oil feed cap and pressurize the
tank.
16. Attach the cover (1) on top of the hydraulic oil tank.
17. After replacing/cleaning the hydraulic oil, filter element,
and strainer, vent the air in the circuit. For details of
venting the hydraulic circuit, refer to the description
under "MAINTENANCE 11 VENTING AIR IN
HYDRAULIC CIRCUITS ".
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