Case WX145 Operator's Manual page 318

Set to horizontal position the marker grooves on the
valves' squares (7).
Clean and grease bearing pins and bushes.
Drive the machine towards the clamshell.
Insert dipper into grab bearing, push bearing pin (2)
home and secure it.
Shut off engine and relieve hydraulic pressure from
clamshell hoses as described.
Clean quick couplers on clamshell and dipper.
Connect hydraulic hoses to clamshell cylinder (8)
and to clamshell rotation motor (9). Check that quick
couplers are perfectly engaged.
Grease all nipples on clamshell and gearing of
clamshell rotating mechanism.
Start the engine and lift the clamshell from the
ground.
Bleed clamshell hydraulic system by opening and
closing the clamshell repeatedly and by turning it
clockwise and counter-clockwise.
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